Gilderfluke & Co Sd-25 w/DMX User manual
Sd-25 with DMX-512
v2.nn
Stereo Audio Playback System
with
Mp3 and .WAV Playback from Sd/SdHC flash Cards,
50 Watt Class-D Amplifier,
Stereo Mixer,
DMX-512 Receiver,
Rs-232 Port and
IR Receiver
The Sd-25 w/DMX is a complete stereo audio playback system. It can be used in
Store-Casting, Music-On-Hold, Museum, Safety, Haunt, Industrial or Entertainment ap-
plications. Anywhere you need a solid state, high quality audio system that will play for
years.
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 1 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 2 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
Safety Disclaimer: Any electronic or mechanical sys-
tem has a potential to fail. Certain applications using
Gilderfluke & Company equipment may involve poten-
tial risks of death, personal injury, or severe property, or
environmental damage (“Critical Application”).
Gilderfluke & Company equipment is not designed, in-
tended, authorized, or warranted to be suitable in life
support applications, devices, or systems, or other
critical applications. Inclusion of Gilderfluke & Com-
pany products in such applications is understood to be
fully at the risk of the customer. In order to minimize
risks associated with the customer's applications, ade-
quate design and operating safeguards should be pro-
vided by the customer to minimize inherent or proce-
dural hazards.
Gilderfluke & Company assumes no liability for appli-
cations assistance, customer produced design, soft-
ware performance, or infringement of patents or copy-
rights. Nor does Gilderfluke & Company warrant or rep-
resent that any license, either express, or implied, is
granted under any patent right, copyright, mask work
right, or other intellectual property right of Gilderfluke &
Company covering or relating to any combination, ma-
chine, or process in which Gilderfluke & Company
products or services might be or are used.
...................................................................Sd-25 w/DMX Configuration & Installation!7
............................................................................................................................................Sd/SdHC Card:!7
.........................................................................................................................................Speaker Outputs:!7
.........................................................................................................................................Bridged Amplifier:!8
..........................................................................................................................................DMX-512 Inputs:!8
............................................................................................................................................Trigger Inputs:!14
............................................................................................................................................Power Supply:!14
.......................................................................................................................................Volume Controls:!15
..................................................................................................................Line Level Inputs and Outputs:!15
......................................................................................................................................Modulation LEDs:!16
................................................................................................................................ʻStatusʼRelay Output:!16
....................................................................................................................................Status Output LED:!17
....................................................................................................................................RS-232 Serial Port:!17
................................................................................Using the Serial Port to Select and Play SoundFiles:!18
.............................................................................Using the Serial Port to Adjust Audio Playback Levels:!18
.....................................................................................................................................InfraRed (IR) Port:!18
........................................................................................................................IR Port in Modes 1A or 1B:!19
...................................................................................................................IR Port with Apple IR Remote:!19
......................................................................................................................................Sd-25 Installation:!20
........................................................................Sd-25 w/DMX non-DMX Configuration!21
......................................................................................................................................Operating Modes:!22
..............................................................Mode 0 / off/off/off/off/off: Loops with Mutes Fade to -3dB on ʻbʼ! 22
..............................................................Mode 1 / on/off/off/off/off: Loops with Mutes Fade to -6dB on ʻbʼ! 22
..............................................................Mode 2 / off/on/off/off/off: Loops with Mutes Fade to -9dB on ʻbʼ! 22
............................................................Mode 3 / on/on/off/off/off: Loops with Mutes Fade to -12dB on ʻbʼ! 22
............................................................Mode 4 / off/off/on/off/off: Loops with Mutes Fade to -18dB on ʻbʼ! 22
............................................................Mode 5 / on/off/on/off/off: Loops with Mutes Fade to -24dB on ʻbʼ! 22
............................................................Mode 6 / off/on/on/off/off: Loops with Mutes Fade to -33dB on ʻbʼ! 22
............................................................Mode 7 / on/on/on/off/off: Loops with Mutes Fade to -48dB on ʻbʼ! 22
................................................Mode 8 / off/off/off/on/off: Two triggers, with fast access to 1st SoundFile!23
.......................................Mode 9 / on/off/off/on/off: Two triggers, with exclusive access to 1st SoundFile!23
...........................................................Mode A / off/on/off/on/off: Trigger + reshuffle and a second trigger!23
...Mode B / on/on/off/on/off: Like Mode A, except the ʻbʼinput plays 2 thru ?? instead of ʻAllʼSoundFiles!24
..............................................................................Mode C / off/off/on/on/off: Single trigger with reshuffle!24
..........................................Mode D / on/off/on/on/off: Single trigger with mute on ʻaʼFade to -6dB on ʻbʼ! 24
.........................................Mode E / off/on/on/on/off: Single trigger with mute on ʻaʼFade to -12dB on ʻbʼ! 24
.........................................Mode F / on/on/on/on/off: Single trigger with mute on ʻaʼFade to -24dB on ʻbʼ! 24
.......................................Mode 10 / off/off/off/off/on: Single trigger with mute on ʻaʼFade to muted on ʻbʼ! 24
..........................Mode 11 / on/off/off/off/on: Single trigger with mute/reshuffle on ʻaʼFade to -6dB on ʻbʼ! 25
........................Mode 12 / off/on/off/off/on: Single trigger with mute/reshuffle on ʻaʼFade to -12dB on ʻbʼ! 25
........................Mode 13 / on/on/off/off/on: Single trigger with mute/reshuffle on ʻaʼFade to -24dB on ʻbʼ! 25
........................Mode 14 / off/off/on/off/on: Single trigger with mute/reshuffle on ʻaʼFade to muted on ʻbʼ! 25
..................................................................................................Mode 15 / on/off/on/off/on: Two PlayLists!25
........................................Mode 16 / off/on/on/off/on: Two PlayLists, with looping background SoundFile!25
........................................Mode 17 / on/on/on/off/on: Two PlayLists, with looping background SoundFile!26
..........Mode 18 / off/off/off/on/on: Trigger SoundFiles one or two, with a background SoundFile PlayList!26
..........................Mode 19 / on/off/off/on/on: ʻStoreCasterʼ, ʻSafety Messageʼand ʻMusic-On-Holdʼmode!27
............................................................................................Mode 1A / off/on/off/on/on: ʻIR Normalʼmode!27
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 3 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
................................................................................................Mode 1B / on/on/off/on/on: ʻIR Oddʼmode!27
..................................................................................Mode 1C / off/off/on/on/on: ʻDougʼs Doorbellʼmode!27
.......Mode 1d / on/off/on/on/on: Fade out and Trigger 2 PlayLists, with 1 background looping SoundFile!28
Mode 1E / off/on/on/on/on: Fade out and Trigger SoundFiles one or two, with a background Looping
.................................................................................................................................................PlayList!28
................................................................................Mode 1F / on/on/on/on/on: Reserved for Future Use!29
.........................................................................................................................................Trigger Options:!29
...................................................................................................................................Audio Ramp Speed:!29
..................................................................................................................................Sequential/Random:!29
.........................................................................................................................Steppable/Non-Steppable:!29
........................................................................................................................................Amplifier Enable:!30
....................................................................................................................................Seamless Looping:!30
.......................................................Using the Two Inputs on an Sd-25 to Randomly Access SoundFiles:!30
..........................................................................................................................................Special Orders:!30
.........................................................................................................................FCC and CE Compliance:!31
............................................................................................................................FCC Instruction to User:!31
....................................................................................................EC DECLARATION OF CONFORMITY!31
.....................................................................HEXadecimal to Decimal to Percentage!32
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 4 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
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Sd-25 w/DMX Manual • page 5 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
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Sd-25 w/DMX Manual • page 6 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
Sd-25 w/DMX Configuration & Installation
Before the Sd-25 w/DMX can be used, you will need to drag-n-drop your SoundFiles onto a Sd or SdHC flash card,
attach a power supply, speakers, and (optionally) a switch or DMX-512 to start the Sd-25 w/DMX playing. Select the
operating mode using the DipSwitch to tell the Sd-25 w/DMX how you would like your SoundFiles to be played.
Sd/SdHC Card:
Any standard Secure Digital (Sd) or SdHC flash
memory card can be used with the Sd-25. As of this
writing, Sd and SdHC cards are available in sizes up
to thirty-two GBytes. These can
hold months of continuous audio
playback. The Sd-25 supports up
to 255 SoundFiles in most operat-
ing modes. Some modes support
up to 32,767 SoundFiles.
The flash card should be format-
ted ʻFATʼor ʻFAT32ʼ(it will proba-
bly come that way).
Most laptops now come with a
built-in Sd card reader/writer slot.
If your PC doesnʼt have one of
these, you will need to use an Sd
card reader/writer attached to
your PC or Mac through a USB
port.
You load Mp3 and .wav files onto
the Sd card by simply dragging-n-
dropping them onto your Sd card.
On bootup, or when a Sd card is
inserted in the Sd-25, it will sort
the SoundFiles. For 255 or less
SoundFiles, they are played in
alphanumeric order, based
upon the 8.3 DOS FileName. If
there are more than 255
SoundFiles on the Sd card,
then they will be played in Win-
dows Drag-n-Drop order.
For the Sd-25s to recognize a
SoundFile, its FileName must start with an alpha-
numeric character, and it must have the extension of
either ʻ.wavʼor ʻ.Mp3ʼ. If a SoundFile meets these
criteria, the Sd-25 will attempt to play it. If the Sd-25
canʼt play a SoundFile for any reason, it will give up
after a few seconds.
The Sd-25 will play just about all stereo Mp3 or .wav
file formats. Mp3 bit rates up through 320 Kb/second
are supported. .Wav files of up to 48 Kbytes/second
and sixteen bit are supported.
If a file does not play, it is most often
caused by a large (more than 2 MBytes)
ʻid3ʼtag at its front. These typically hold
the album cover artwork for files down-
loaded from iTunes and similar sources.
Since a Sd-25 canʼt use album
artwork, it simply takes up addi-
tional storage space, delays the
time it takes a SoundFile to start
playing, and (in the worst case),
will keep a SoundFile from playing
at all. Most audio programs (in-
cluding iTunes, Audacity, etc.)
have an option to delete ʻid3ʼtags.
Speaker Outputs:
The Sd-25ʼsamplifier is a ʻClass-
Dʼdesign. Its efficiency is near
90%. If you feed 50
Watts of 24 vdc into the
Sd-25ʼs amplifier, you
will get almost 50 Watts
into your speakers. ʻLinearʼ
amplifiers have only
about 20% efficiency.
Fully 80% of the power
you put into them goes
into the heatsink as waste
heat. A 50 Watt linear ampli-
fier would only feed 10 Watts of power into your
speakers, and 40 Watts into the heatsink. This
makes the Sd-25ʼsamplifier roughly equivalent to
what would be a 200 to 250 Watt linear amplifier!
If you are going to run your speakers at high SPLs,
you will need to select speakers that can handle at
least 125 to 150 Watts or more of continuous
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Sd-25 w/DMX Manual • page 7 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
12-24vdc
Power
Level
Sd-
Left
Line InLevel Line In Level Level
Sd-
Right
Mixer
Right
Mixer
Left
Audio Repeater/Amp
Gilderfluke & Company
Burbank, California
Sd-25 w/DMX
B
Left Right
Power
12-24
vdc A
Trigger
Inputs
Speakers
(8Ω)
Running
Status
Power Supply
12 to 24 vdc
Optional Line
Level In or
Line Level Out
Switch 'B'
Switch 'A'
power. Speakers smaller than this may clip or be
damaged if run at too high an output power level
from the Sd-25.
The amplifier outputs from the Sd-25 can be used
with speakers of eight ohms (or higher) impedance,
or four ohms when bridged. As with any amplifier,
you can series/parallel a number of speakers, so
long as the impedance remains within these limits.
In rare cases your speaker may clip out at an un-
usually low level. This may be that the protection
circuitry inside the crossover is confused by the digi-
tal output of the Sd-25ʼsamplifier. If this is the case,
we have a small filter modules that can filter the high
frequency spikes the speaker receives.
The Sd-25ʼsamplifier is well protected from short
circuits and overheating. You can stick a screwdriver
right across the speaker terminals. The amplifier will
instantly turn off. The Sd-25ʻsamplifier will go back
to work an instant after a fault is removed.
If the speaker impedance is too low and you are
running at a high volume level, the amplifier may
start to cut out. If you hear this, check the power
supply voltage. If the power supply voltage is drop-
ping, you might simply be drawing too much power
for the power supply and a larger supply may fix
your problem. If the power supply is OK, and you
canʼt increase the speaker impedance, then you
might simply be asking too much of the Sd-25ʼs
amplifier, and need to turn down the volume a tad.
If you wish to comply with FCC and CE standards
for radio frequency emissions, you should use
shielded speaker wires with the Sd-25. The shield
should be attached to a good ʻEarthʼground. If no
ʻEarthʼground is available, then attach the shields to
the ʻnegativeʼpower supply terminal, which is im-
mediately adjacent to the speaker
terminals. This will not effect the
sound quality from the Sd-25, but
will make the FCC and CE folks
happy. Shielded speaker lines
were used during all CE/FCC cer-
tification testing.
Bridged Amplifier:
If you need a mono output with
more ʻoomphʼ, then amplifier in
the Sd-25 can be ʻbridgedʼ.
Bridging will only have an effect Bridged Wiring
Left Right
Power
12-24
vdc
Speakers
(8Ω)
with lower impedance speakers (4 ohms). You wonʼt
hear a bit of difference if you are using an 8 ohm
speaker. The only audio which is amplified comes
from the ʻleftʼsources (mixer and repeater). The wir-
ing to ʻbridgeʼthe amplifier is a little different from
what you might be used to on a linear amplifier. The
speaker is wired in parallel to both speaker outputs
as shown in the drawing, and the ʻStereo/Bridgedʼ
switch on the bottom of the Sd-25 is moved to the
ʻBridgedʼposition.
Wiring the speak-
ers for a ʻBridgedʼ
output without
throwing the
ʻStereo/Bridgedʼ
switch to the
ʻBridgedʼposition
can damage the
Sd-25ʼs amplifier.
DMX-512 Inputs:
The DMX-512 connections are through two RJ-45
connectors. These are the eight position, eight con-
ductor plugs typically used for ethernet cables. They
are also used for DMX-512. The pinout of the DMX-
512 connectors follows the USITT wiring standards:
Pair
Wire #
Color
Function
DMX-512 Pin
Pair 2
1
White / Orange
Data 1+
DMX-512 Pin 3
2
Orange
Data 1-
DMX-512 Pin 2
Pair 3
3
White / Green
no connection
no connection
6
Green
Pair 1
4
Blue
5
White / Blue
Pair 4
7
White / Brown
Signal Common
DMX-512 Pin 1
8
Brown
Shield
Drain
The two DMX-512 connectors are wired in parallel.
Either one can be used as the ʻinputʼor the ʻthruʼ.
You can easily daisy chain between multiple Sd-
25ʼs, v-HD-to-DMXs, Br-EFBs and other DMX-512
devices using standard (not crossover) ethernet ca-
bles.
Whenever it is receiving valid DMX-512, the Sd-25s
will toggle its DMX-512 LED on each packet re-
ceived.
If the DMX-512 is coming from another piece of Gil-
derGear, it will automatically sense and start using
Gilderfluke & Company
www.Gilderfluke.com
DIN Rail
Mount
DIN Rail
Mount
Sd-25
w/ DMX
Mixer In
Line Out
Bridged
Stereo
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 8 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
the GilderCheckSums. These prevent the Sd-25s
from triggering on any corrupted DMX-512 packet.
If you plug the Sd-25ʼsRs-232 port into a computer
and fire up GilderTerm (or any other terminal pro-
gram), it will display the current DMX-512 mode,
DMX-512 address, if DMX-512 is being received
and if GilderCheckSums are being received in the
DMX-512.
SoundFiles are triggered by ʻbumpingʼthe data sent
to the DMX-512 address you have set for the Sd-25.
The bump should have no ramping, as that could
trigger other SoundFiles as it ramps up and down.
With one through eight SoundFiles loaded on the
Sd-25, each individual bit triggers each SoundFile. If
you bump the channel to a value of:
Decimal
Value
Hexadeci-
mal
Bit Number
SoundFile played
1
0x01
0
SoundFile #1
2
0x02
1
SoundFile #2
4
0x04
2
SoundFile #3
8
0x08
3
SoundFile #4
16
0x10
4
SoundFile #5
32
ox20
5
SoundFile #6
64
0x40
6
SoundFile #7
128
0x80
7
SoundFile #8
With between nine and 255 SoundFiles loaded onto
the Sd-25, You just ʻBumpʼthe DMX-512 address
you have set for the Sd-25 to the value of the
SoundFile you want to play. If you bump the channel
to a value of:
Decimal Bump
Value
Hexadecimal
Bump Value
SoundFile played
1
0x01
SoundFile #1
10
0x0A
SoundFile #10
100
0x64
SoundFile #100
255
0xFF
SoundFile #255
If you have set the DipSwitches to DMX-512 mode 2
(DipSwitch #11 =Off and DipSwitch #12 = On), once
you start a SoundFile playing, you will not be able to
start another SoundFile until the first SoundFile has
finished. This is called ʻUnsteppableʼmode.
If you have set the DipSwitches to DMX-512 mode 3
(both DipSwitch #11 and DipSwitch #12 = On), then
the next consecutive DMX-512 address after the
address used for selecting and playing the Sound-
Files will be used to control the volume of the audio
played from the Sd card. A 100% value will give you
full volume, limited by both the volume control pots
and any muting provided by the trigger inputs (see
next paragraph). Serial and DMX-512 volume com-
mands are not saved to non-volatile memory.
When in any of the DMX-512 operating modes, the
two trigger inputs can be used to fully mute (input
ʻAʼ) or partially mute (-12 dB on Input ʻBʼ) the audio
from the Sd card. This is equivalent to the non-DMX
mode-3 with the ramp speed set to the slowest rate.
The twelve position DipSwitch controls the DMX-512
address and mode of operation for the DMX-512
port on the Sd-25. The first nine positions set the
address, and the last two switches control the DMX-
512 mode. A pen or any other pointy object can be
used to flip the switches. Do not use a knife or other
sharp object, as it might damage the switch.
Despite of what it may say on the switch, Down is
Off and Up is On.
DMX
Mode
Sw 1 -
Sw 9
Sw 10
Sw 11
Sw 12
Description
Non-
DMX
Mode &
Options
Off
=
Amp
on only
when
playing
On
=
Amp
always
on
Off
Off
Not Using DMX-512.
Select operating mode
& options on Sw 1-9
DMX
Mode 1
DMX
Address
On
Off
One DMX address
selects & plays
SoundFiles
DMX
Mode 2
DMX
Address
Off
On
Same as above, but
once playing, Sound-
Files are Unsteppable
DMX
Mode 3
DMX
Address
On
On
1st addr. used to select
& play SoundFiles,
2nd controls volume
The DMX-512 Address is set using DipSwitch posi-
tions #1 through #9 (down=Off, up = On).
DMX-512 addresses are either ʻOne-Basedʼ(ad-
dresses run from 1 to 512) or ʻZero-Basedʼ(ad-
dresses run from 0 to 511).
Zero-based DMX-512 addressing was originally
used on all DMX-512 equipment. Some users had
trouble with the idea of counting from ʻzeroʼ, so one
was added to the zero-based DMX-512 addresses
to make them one-based. Most installations now
use one-based DMX-512 addresses.
Use the first column to find a One-Based DMX-512
address. Use the second column for Zero-Based
DMX-512 addresses. Then set DipSwitch positions
one through nine as shown in the chart:
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 9 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
One-
Based
DMX
Zero-
Based
DMX
+1
Sw
#1
+2
Sw
#2
+4
Sw
#3
+8
Sw
#4
+16
Sw
#5
+32
Sw
#6
+64
Sw
#7
+128
Sw
#8
+256
Sw
#9
1
0
Off
Off
Off
Off
Off
Off
Off
Off
Off
2
1
On
Off
Off
Off
Off
Off
Off
Off
Off
3
2
Off
On
Off
Off
Off
Off
Off
Off
Off
4
3
On
On
Off
Off
Off
Off
Off
Off
Off
5
4
Off
Off
On
Off
Off
Off
Off
Off
Off
6
5
On
Off
On
Off
Off
Off
Off
Off
Off
7
6
Off
On
On
Off
Off
Off
Off
Off
Off
8
7
On
On
On
Off
Off
Off
Off
Off
Off
9
8
Off
Off
Off
On
Off
Off
Off
Off
Off
10
9
On
Off
Off
On
Off
Off
Off
Off
Off
11
10
Off
On
Off
On
Off
Off
Off
Off
Off
12
11
On
On
Off
On
Off
Off
Off
Off
Off
13
12
Off
Off
On
On
Off
Off
Off
Off
Off
14
13
On
Off
On
On
Off
Off
Off
Off
Off
15
14
Off
On
On
On
Off
Off
Off
Off
Off
16
15
On
On
On
On
Off
Off
Off
Off
Off
17
16
Off
Off
Off
Off
On
Off
Off
Off
Off
18
17
On
Off
Off
Off
On
Off
Off
Off
Off
19
18
Off
On
Off
Off
On
Off
Off
Off
Off
20
19
On
On
Off
Off
On
Off
Off
Off
Off
21
20
Off
Off
On
Off
On
Off
Off
Off
Off
22
21
On
Off
On
Off
On
Off
Off
Off
Off
23
22
Off
On
On
Off
On
Off
Off
Off
Off
24
23
On
On
On
Off
On
Off
Off
Off
Off
25
24
Off
Off
Off
On
On
Off
Off
Off
Off
26
25
On
Off
Off
On
On
Off
Off
Off
Off
27
26
Off
On
Off
On
On
Off
Off
Off
Off
28
27
On
On
Off
On
On
Off
Off
Off
Off
29
28
Off
Off
On
On
On
Off
Off
Off
Off
30
29
On
Off
On
On
On
Off
Off
Off
Off
31
30
Off
On
On
On
On
Off
Off
Off
Off
32
31
On
On
On
On
On
Off
Off
Off
Off
33
32
Off
Off
Off
Off
Off
On
Off
Off
Off
34
33
On
Off
Off
Off
Off
On
Off
Off
Off
35
34
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Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 10 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
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+1
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+2
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+4
Sw
#3
+8
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#4
+16
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+32
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+64
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+128
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+256
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#9
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Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 11 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
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Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 12 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
One-
Based
DMX
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Based
DMX
+1
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#1
+2
Sw
#2
+4
Sw
#3
+8
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#4
+16
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#5
+32
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#6
+64
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#7
+128
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#8
+256
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#9
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One-
Based
DMX
Zero-
Based
DMX
+1
Sw
#1
+2
Sw
#2
+4
Sw
#3
+8
Sw
#4
+16
Sw
#5
+32
Sw
#6
+64
Sw
#7
+128
Sw
#8
+256
Sw
#9
470
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On
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Off
Off
Off
Off
On
On
On
On
On
498
497
On
Off
Off
Off
On
On
On
On
On
499
498
Off
On
Off
Off
On
On
On
On
On
500
499
On
On
Off
Off
On
On
On
On
On
501
500
Off
Off
On
Off
On
On
On
On
On
502
501
On
Off
On
Off
On
On
On
On
On
503
502
Off
On
On
Off
On
On
On
On
On
504
503
On
On
On
Off
On
On
On
On
On
505
504
Off
Off
Off
On
On
On
On
On
On
506
505
On
Off
Off
On
On
On
On
On
On
507
506
Off
On
Off
On
On
On
On
On
On
508
507
On
On
Off
On
On
On
On
On
On
509
508
Off
Off
On
On
On
On
On
On
On
510
509
On
Off
On
On
On
On
On
On
On
511
510
Off
On
On
On
On
On
On
On
On
512
511
On
On
On
On
On
On
On
On
On
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 13 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
Trigger Inputs:
The two trigger inputs can be used with any type of
switch. This can be a pushbutton, motion detector,
IR beam, step mat, a digital signal from a control
system, or anything else
that will give you a ʻpow-
ered switch closureʼ. The
trigger inputs are non-
polarized (they donʼt care
which terminal is
p o s i t i v e o r
negative) and
opto-isolated.
You must feed
a DC voltage into
them. Just
touching a pair
of leads from a
nine volt tran-
sistor radio battery
is a good test of the in-
puts. As shown in the first illustration, you can ʻbor-
rowʼsome of the power that is running the Sd-25
using the adjacent ʻPowerʼscrew terminals, or use a
separate isolated sup-
ply (as shown in the
second illustration).
The isolated power
supply can be any DC
power supply
or battery, as
long as the
output is be-
tween 5 and 24
vdc. Because
the inputs are
not polarity
sensitive, you
can wire the
power supply with either
polarity. i.e.: You canʼt get it wrong.
The best test for your wiring are the green ʻInputʼ
LEDs, located adjacent to the inputsʼscrew termi-
nals. These LEDs are on the isolated side of the in-
puts, so if the Sd-25 is powered and you apply a
voltage to an input, the LED will light.
If these LEDs are ʻglowingʼeven dimly when off, that
is an indication that an AC voltage is being induced
B
Right
Power
12-24
vdc A
Trigger
Inputs
Speakers
Running
Status
Switch 'B'
Switch 'A'
B
Left Right
Power
12-24
vdc A
Trigger
Inputs
Speakers
(8Ω)
Running
Status
Switch 'B'
Switch 'A'
Isolated
Power
Supply
on the wires to your switches. Either separate the
switch wires from the AC wires (this can include
speaker lines), or add a small resistor across the
input terminals to drain away this in-
duced voltage.
Not surprisingly, all Gilderfluke & Co.
control systems are easy to attach to an
Sd-25. A Br-miniBrick4 is shown be-
cause it is the only piece of GilderGear
that doesn't have DMX-512 network-
ing. We recommend attaching all other
GilderGear to the Sd-25ʼsusing the
DMX-512 network.
On the Br-miniBrick4, the common
positive is run to one side of both Sd-
25 inputs, and the control system out-
puts are wired to the Sd-25 inputs.
Power Supply:
The Sd-25 will run on any voltage from
12 through 24 vdc. Size your power supply so it will
provide enough current for the volume you are plan-
ning to run through your speakers. The amplifier will
put out more power at 24 volts than it can at a lower
voltage. If using all 50 Watts of the amplifier power,
you will need to use a 24 volt supply rated for at
least 60 Watts. By its nature, the Class-D amplifier
can switch between drawing nothing to drawing 50+
Watts thousands of times per second. The power
supply must be able to do this without dropping out.
If you hear clipping, the speakers or power supply
may be undersized for your application, or your
speakers may have an impedance below 8 ohms.
If you arenʼt using the amplifier, the Sd-25 will run
on as low as 7 volts. Below 12 volts the amplifier is
disabled.
The power supply can be attached through either
the 2.1 mm power jack, or the screw terminals. They
are wired in parallel.
Power Supply voltages higher than 24 vdc can po-
tentially damage the amplifier on the Sd-25. The
ESD protection diodes on the power supply inputs
are rated for 30 VDC before they kick in.
Br-MiniBrick4
Gilderfluke & Co.
Burbank, California
0
1
2
3
Record
Go
Data
Trigger
9-24
vdc
Outputs
Outputs
Triggering from a
Control System
A
Inputs
B
Sd-10
Sd-25 w/DMX
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Sd-25 w/DMX Manual • page 14 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
Volume Controls:
A pair of small trimpots on the Sd-25 are used to set
the maximum audio output level from the
Line Level
Input/Output
Sd Volume
Mixer Volume
IR Sensor
Window
Sd card. The operating modes which ramp the audio
up and down can never exceed the level set by
these pots.
An additional pair of pots is used to set the levels for
the ʻmixerʼinputs.
You can adjust these pots using a small ʻtrimmerʼ
screwdriver. A suitable screwdriver comes as part of
the Sd-25/Starter Kit.
These trimpots are smaller than you. Do not use a
big screwdriver on them. Do not apply too much
force. They can be broken if you strong-arm
them!
Line Level Inputs and Outputs:
Two gold plated
ʻRCAʼjacks are
available on Sd-25s
(as shown in the
preceding photo). A
switch on the bottom
of the case allows
you to switch these
jacks between a line
level output of the
audio coming from
the Sd card, or a line
level input that gets
mixed with the audio coming from the Sd card.
When the switch is set to the ʻLine Outʼposition, the
audio from the Sd Card is sent to both the amplifier
and the RCA jacks. Only the audio going to the am-
plifier is routed through the ʻSd Levelʼpots. The
RCA outputs will always be at full volume unless the
audio level is reduced in the DSP by a serial volume
command, DMX-512 volume command, or full or
half muting command from the trigger inputs.
To use the line level outputs, just run a pair of RCA
cables to your amplifier (or amplified speakers), just
as you would if you were connecting an iPod or CD
player. The line level outputs are robust enough to
drive headphones and small speakers directly.
When the switch is set to the ʻLine Inʼposition, line
level audio signal from a Sd-10 or another Sd-25
audio repeater, pre-amplified microphone or any
other line-level audio source can be plugged into the
two RCA jacks. Two ʻMixer Levelʼtrimpots can be
used to adjust the audio levels of the mixer inputs.
These inputsʼlevels are not effected by a serial vol-
ume command, DMX-512 volume command, or full
or half muting command from the trigger inputs.
In this example, a pre-amplified (or line level) micro-
phone is fed into the mixer inputs of the Sd-25. The
ʻPush to Talkʼbutton on the microphone is fed into
the ʻbʼinput of the Sd-25. The Sd-25 is configured to
ʻduckʼthe audio from Sd the card to a lower level
when it sees a closure on the ʻbʼinput. When the
microphone button is pressed, the Sd-25 ramps the
prerecorded audio down to a lower level, and the
microphone is used to make an announcement.
When the ʻPTTʼbutton is released, the prerecorded
audio ramps back up to the normal playback level.
Gilderfluke & Company
www.Gilderfluke.com
DIN Rail
Mount
DIN Rail
Mount
Sd-25
w/ DMX
Mixer In
Line Out
Bridged
Stereo
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 15 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
12-24vdc
Power
Level
Sd-
Left
Line InLevel Line In Level Level
Sd-
Right
Mixer
Right
Mixer
Left
Audio Repeater/Amp
Gilderfluke & Company
Burbank, California
Sd-25 w/DMX
B
Left Right
Power
12-24
vdc A
Trigger
Inputs
Speakers
(8Ω)
Running
Status
Pre-Amp
'PTT' Switch
PreAmp
Modulation LEDs:
The two ʻmodulationʼLEDs, which are located in
front of the speaker screw terminals, blink to show
audio as it is being reproduced. They pick up the
audio signal coming from the repeater before the
two volume control pots, so they are not affected by
adjusting these pots or by the auxiliary ʻmixer inputs.
Reducing the audio level through one of the ʻramp-
ingʼfunctions will reduce the intensity of these
LEDs. Audio at too low a level will cause these
LEDs to completely extinguish. Normalize your
audio before loading it on the Sd-25 so that it is near
100% modulation.
Sometimes additional safety system assurance
above and beyond monitoring the ʻStatusʼRelay
Output output is needed to confirm that the Sd-25 is
actually playing. An external solid state relay or op-
toisolator can be attached in place of these LEDs.
The safety system can then monitor this to confirm
that an audio signal is indeed being generated. Con-
tact Gilderfluke & Company for more information on
this sort of application.
ʻStatusʼRelay Output:
A single solid state relay
output is available for
remote monitoring of the
Sd-25. It is ʻonʼonly
while the Sd-25 is play-
ing a triggered or ʻfore-
groundʼSoundFile. It is
not active while stopped or
when playing a ʻbackgroundʼ
looping SoundFile. It can be
used to control ducking mixers,
relays, or whatever you need.
This output is a solid state re-
lay output, which is rated
for up to 250ma at up to
24 Volts of AC or DC. Like
the trigger inputs, this output is not
polarity sensitive. Unless whatever
you are controlling is polarity sensitive
(like the input to a larger solid state relay or an LED,
as shown in the illustrations), you can ignore power
supply polarity and wire it up either way. You can
power the ʻStatusʼRelay Output from the adjacent
Power Supply screw terminals (as shown at left), or
use an isolated AC or DC power supply (as shown
at the right).
To turn on a light, motor, or other electrical device
while a triggered or foreground SoundFile is playing,
just wire a solid state relay to the ʻStatusʼRelay
Output. Then wire the light, motor, or whatever you
are controlling to this relay. This can be used in a
museum, trade show, Point Of Sale (POS) and other
applications where all you need to do is turn ʻonʼa
light or other device while your SoundFile is playing.
HINT: If you need the ʻStatusʼRelay Output to turn
on after the Sd-25 is triggered, but before your
SoundFile starts playing, or stay on for a bit after the
SoundFile ends, just pad out your SoundFile with
silence. Sd-25 turns on this output when a fore-
ground sound is playing. It doesnʼt care if you hap-
pen to be playing ʻsilenceʼ. It will turn on the output
just the same.
Another application for the ʻStatusʼRelay Output is
when you need a background audio SoundFile to
continue playing when a triggered foreground
SoundFile is also playing, the BGM SoundFile can
be played from a Sd-10 or another Sd-25 which
Right
Power
12-24
vdc A
Trigger
Inputs
Speakers
Running
Status
B
Right
Power
12-24
vdc A
Trigger
Inputs
Running
Status
Isolated
Power
Supply
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 16 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
feeds its audio into the ʻmixerʼinputs of the first Sd-
25.
When the Sd-25 plays a triggered SoundFile or a
timed announcement (if using modes 16, 17 or Sto-
reCaster mode) the ʻStatusʼRelay Output will go ac-
tive. This is wired into an input on the Sd-10 which
has been configured to partially duck, or fully mute
its audio output. In this way, the Sd-10 will duck (or
mute) the BGM SoundFile (without stopping it) while
the foreground SoundFile plays.
ʻBackgroundʼlooping SoundFiles, like those in
modes 16 and 17 will not turn on the ʻStatusʼRelay
Output. When in these modes, the ʻStatusʼoutput
will only be turned on when a triggered SoundFile is
playing. In StoreCaster mode, the ʻStatusʼRelay
Output will only be turned on when playing Sound-
File #1.
In a safety related application, such as a fire or
emergency annunciator system, the safety system
can monitor this output to confirm the Sd-25 is re-
ceiving commands and playing SoundFiles. For ab-
solute surety, you can monitor that this output goes
active when a SoundFile is triggered, and goes inac-
tive at the end of the SoundFile.
Status Output LED:
The LED which is next to the ʻStatusʼrelay output
does not reflect the current state of the Status
Output Relay. Instead, it flashes to show accesses
12-24vdc
Power
Level
Sd-
Left
Line InLevel Line In Level Level
Sd-
Right
Mixer
Right
Mixer
Left
Audio Repeater/Amp
Gilderfluke & Company
Burbank, California
Sd-25 w/DMX
B
Left Right
Power
12-24
vdc A
Trigger
Inputs
Speakers
(8Ω)
Running
Status
Audio
Repeater
Line Out
A
Inputs
Sd-10
9-24
vdc
B
Power
Right
Left
9-24 vdc
Burbank, California
Gilderfluke & Co.
to the Sd flash card by the Sd-25.
This LED will flicker when an Sd-25 boots, as it
counts each SoundFile on the card1. When not play-
ing, it will be very dim. While playing, it will flicker at
a high rate of speed. The faster the flicker, the
higher your SoundFileʼs bit rate.
RS-232 Serial Port:
An RS-232 serial port is built in to every Sd-25. On
the earlier versions of the Sd-25, the serial port was
available only as an option (part #Sd-RS/232).
The serial port on a Sd-25 runs at a fixed rate of
9600 baud, n, 8, 1.
Adapters to attach this port to a PC or Mac are
available from Gilderfluke & Company as (as part
numbers C-USB-RS232 or USB-RS232/422). It can
also be controlled from a Gilderfluke & Co. Br-SDC/
09 (a null modem cable must be used to flip pins #2
and #3 when used with a Br-SDC/09).
The RS-232 serial port uses a ⅛” (3.5mm) stereo
plug. The pinout to connect this to a standard DE-09
connector as found on a PC or our serial adapters is
as shown:
We offer a ready-made cable as our part number
Mp3-50/CBL.
When the Sd-25 boots or a Sd card is inserted, the
Sd-25 will list all the SoundFiles that are found, as
well as the order after sorting them alphanumeri-
cally:
Rxd
Txd
gnd
IBM AT
Serial
1
2
3
4
5
6
7
8
9
1
3
2
3.5mm Stereo
(ring)
(tip)
(sleeve)
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 17 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
1The speed at which the Sd-25 counts the SoundFiles is perhaps the best indication of how ‘fast’ a SD flash card is. Fast cards will count up to ten SoundFiles
each second. Slower cards may only count one SoundFile per second.
When any SoundFile is played, the configuration
settings and the name and info about the SoundFile
are displayed through the serial port. The Sd-25
then reports the SoundFile time as it plays.
If set for DMX-512 input, the status report will show
which DMX-512 mode the player is in, the DMX-512
address, if DMX-512 is being received, and if the
DMX-512 packets contain GilderCheckSums.
Using the Serial Port to Select
and Play SoundFiles:
To select and play a SoundFile through the serial
port, send the Sd-25 an ASCII ʻpʼcharacter (ʻpʼis
short for ʻplayʼ), followed by a two digit ASCII Hex
number of the SoundFile you want to be played. Ex-
ample: To play SoundFile 1, send ʻp01ʼ. To play
SoundFile 5, send ʻp05ʼ. For SoundFile 25, send
ʻp19ʼ(the value ʼ19ʼis the hexadecimal equivalent of
the decimal number ʼ25ʼ).
Gilderfluke & Co. Sd-25w/DMX v1.28 copyright 2014 DCM
a=C, b=C, DipSw=_2______9___
mode=02, Volume Level=__0, Sd Card w/__0 SoundFiles
xxx: HERO____.MP3
SoundFileTime=____0
_SoundFiles__|__#__|_pos.
CLOCKS__.MP3 | __1 | ___0
HERO____.MP3 | __2 | ___1
LABAMBA_.MP3 | __3 | ___2
ROAM____.MP3 | __4 | ___3
SMOOTH__.MP3 | __5 | ___4
FARAWA~1.MP3 | __6 | ___5
BIGLOVE_.MP3 | __7 | ___6
CLDASICE.MP3 | __8 | ___7
sorted list...
__1 BIGLOVE_.MP3
__2 CLDASICE.MP3
__3 CLOCKS__.MP3
__4 FARAWA~1.MP3
__5 HERO____.MP3
__6 LABAMBA_.MP3
__7 ROAM____.MP3
__8 SMOOTH__.MP3
Gilderfluke & Co. Sd-25w/DMX v1.28 copyright 2014 DCM
a=O, b=O, DipSw=_2______9___
mode=02, Volume Level=255, Amp=ON, Sd Card w/__8 SoundFiles
__5 HERO____.MP3
SoundFileTime=____8
Gilderfluke & Co. Sd-25w/DMX (DEBUG!) v1.28 copyright 2014 DCM
a=O, b=O, DipSw=_2________B_
mode=is DMX-1 @ address: __2 DMX is active w/High CS
Volume Level=255, Amp=ON, Sd Card w/__8 SoundFiles
__5 HERO____.MP3
SoundFileTime=__103
Using the Serial Port to Adjust
Audio Playback Levels:
To set the ʻnormalʼaudio playback level for the Sd
card through the serial port, send the Sd-25 an AS-
CII <Control>+ʼVʼcharacter (0x16), followed by a
two digit ASCII hexadecimal number of the level you
want to use. Valid levels are ʼ00ʼto ʻFFʼ. Example: to
set playback level to 0x80, send ʻ<0x16>ʼ,ʼ80ʼ.
You do this by holding down the <control> key and
then pressing the letter ʻvʼ. Release the <control>
key and press ʻ8ʼand then ʻ0ʼto send the value for
the audio level.
The volume control through the serial port is highly
logarithmic. Once set, the Sd-25 will scale all the
ʻmuteʼand ʻduckʼfunctions to the value you have set
as the ʻnormalʼplayback level. Serial and DMX-512
volume commands are not saved to non-volatile
memory.
InfraRed (IR) Port:
An IR port is built into
every Sd-25. You can
see the window on the
left side of the case for
the IR sensor.
On the earlier versions
of the Sd-25, the IR port
was available only as an option (part
#Sd-IR/Rx). The IR receiver was used
solely in one of the two IR modes (either
mode 1A or 1B) to trigger sounds from an Ir-Tx. On
the Sd-25 it can also be used with an Apple IR re-
mote control for triggering, testing and volume con-
trol.
Whenever the Sd-25 receives an IR signal, the
DMX-512 LED will flash.
The IR receiver on the Sd-25 has a fairly wide re-
ception angle. In some applications you may need
to ʻsnorkelʼthe receiver and/or transmitter to narrow
the beam to suit your application. In outdoor applica-
tions you may need to do this just to keep sunlight
from hitting the sensor directly and temporarily
overwhelming it.
IR Sensor
Window
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Sd-25 w/DMX Manual • page 18 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
IR Port in Modes 1A or 1B:
These modes are typically used to trigger sound on-
board a train, monorail, hay wagon, bus, or other
vehicle.
These two modes are used with Ir-Tx transmitters.
Each Ir-Tx is set to send out a continuous request
for a specific SoundFile. When the IR receiver
comes into range of the Ir-Tx, it will play the re-
quested SoundFile.
In some cases, the Sd-
25s are mounted next to
the path of the vehicle.
An Ir-Tx is mounted
on each vehicle, and
SoundFiles are trig-
gered from station-
ary speakers as
each of the vehicles
pass them.
In most applications, the Sd-25 is
mounted where the IR sensor can see out the left or
right side of the vehicle. As the vehicle passes Ir-
Txsalong its route (and on the same side of the ve-
hicle as the Sd-25ʼsIR port is facing), the desired
SoundFiles are played through on-board speakers.
Even if the route of the vehicle is ʻrandomʼ, the
proper SoundFile will always be triggered as it
passes each Ir-Tx transmitter. You can even have
different Ir-Txson each side of a roadway, transmit-
ting requests for different SoundFiles. One set of
SoundFiles will be triggered when the vehicle goes
in one direction, and a completely different set of
SoundFiles will be triggered when the vehicle travels
in the opposite direction.
HINT: if you have different SoundFiles that are
played at different times (example: One set of
SoundFiles that plays during the daytime, and an-
other set that plays during the night), you can used
two sets of Ir-Tx transmitters to select which plays.
Load the Sd-25s with both sets of SoundFiles.
Power up one set of Ir-Txs, and only the SoundFiles
it requests are played. Swap power to the other set
of Ir-Txs, and then only the second set of Sound-
Files will be played. One major theme park does a
ʻholidayʼredecoration of their major shows. They
used this technique to change their audio systems
between the ʻnormalʼshow and the ʻholidayʼshow
with the flick of a single switch.
IR Port with Apple IR Remote:
When not set to either of
the IR modes (modes 1A
or 1B), or set to listen to
DMX-512, the IR port on
the Sd-25 can be used
with an Apple IR remote
control. These can be used
for testing and adjusting
audio levels, or as the
permanent method of trig-
gering SoundFiles from a
handheld button by an ac-
tor or docent in an attraction
or museum.
The Apple IR remotes have been
manufactured in two different models:
The older all-plastic (right) and newer
all-aluminum (left). Either one will work
with the Sd-25. The aluminum remote
has one more button than the plastic model, but
other than that, they are operationally identical. If
you donʼt already have a drawer full of Apple re-
motes laying around, you can purchase a new All-
Aluminum remote for $19 from Apple. It is their
product number MC377LL/A. There are also lots of
covers and cozies available for the Apple Remotes
from third party vendors.
The buttons are used as follows on the Apple IR
Remotes:
Apple
Plastic IR
Remote
Apple
Aluminum
IR Remote
Function
+
Up
Volume Up
-
Down
Volume Down
Left
Left
Select & Play ‘Previous’ SoundFile
Right
Right
Select & Play ‘Next’ SoundFile
Menu
Menu
Player Status Updated on RS-232 Port
Center
Pause/Play
Play/Pause/Continue
Center
Play/Stop
A few seconds after adjusting the volume level
through Apple IR Remote, the volume setting will be
saved into non-volatile memory in the Sd-25. If you
power the unit down, the next time you power it up it
will return to playing at this preset level. This is use-
ful for adjusting the audio levels in applications
where the Sd-25 is mounted in a difficult-to-reach
location.
If you have the RS-232 port connected to your com-
puter, it will display all IR commands as they are re-
ceived.
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 19 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
HINT: If mounting the Sd-25 in a hard-to-reach loca-
tion, use the pots to set the ʻworst caseʼmaximum
volume for the speakers as it is being hung. When
you climb down off the ladder, then use the Apple
remote to set the final audio levels.
Sd-25 Installation:
The Sd-25 can be mounted using two screws on 2-
1/4” centers; 2-3/4” Augat ʻSnap-Trackʼ(which itself
can be DIN rail mounted); using DIN rail adapters;
or just Velcroʼd down. In many applications, the Sd-
25 can be attached on (or in) the speakers it is feed-
ing. The Sd-25 must not be mounted where it might
get wet, or suffer from extremes of temperature.
The optional DIN rail mounts just snap onto the back
of the Sd-25. Once they are snapped on, they are
wicked hard to get back off.
The Sd-25 has two 0.156” (4mm) diameter mounting
holes. You can use these if you are just screwing the
unit down:
12-24vdc
Power
Level
Sd-
Left
Line InLevel Line In Level Level
Sd-
Right
Mixer
Right
Mixer
Left
Audio Repeater/Amp
Gilderfluke & Company
Burbank, California
Sd-25 w/DMX
B
Left Right
Power
12-24
vdc A
Trigger
Inputs
Speakers
(8Ω)
Running
Status
2.250"
2.250"
2.250
2.250
57.15mm
57.15mm
An Sd-25 is just the right size to fit into a four x four
J-Box (standard electrical junction box typically used
to mount two duplex electrical outlets). Run 12 to 24
vdc in to power the unit, and conduit to where your
speakers are mounted. Then put a ʻblankʼcover
onto the J-Box. No one will ever guess that this little
J-Box is where the audio system is hiding. If no one
knows where it is, unauthorized personnel are un-
likely to mess with it.
Zoos, water parks and miniature golf courses often
mount their Sd-25s in this way in the landscaping.
They just use outdoor-rated J-Boxes and conduit.
Museums, retail stores and other indoor venues of-
ten mount them this way, since they donʼt need to
dedicate an electrical closet to holding a traditional
rack mounted sound system.
If the Sd-25 is to be mounted in an enclosure to pro-
tect it from weather, it should be mounted in a
shaded location so that the sun hitting the case di-
rectly wonʼt overheat it.
Unless the amplifier is being run at extreme output
levels, the Sd-25 will generate very little heat. At-
taching it to something metal will allow it to dissipate
what little heat it does generate.
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 20 of 32 • © September 4, 2014 • Gilderfluke & Co. • DCM
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