Furman HDS-16 User manual

HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
HEADPHONE/AUDIO DISTRIBUTION
AND REMOTE MIXING SYSTEM
HDS-16
HRM-16
MONITORING
SERIES

HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
INTRODUCTION
The HDS-16/HRM-16 Headphone/Audio
Distribution System is the latest addition
to the Furman Sound headphone/audio
distribution product line. The HDS-16
distribution device sends signals to
one or more HRM-16 remote mixers;
the HDS-16 and HRM-16 are sold
separately. This new system, although
similar to our HDS-6/HR-6 system,
offers more channels and several
en hanced features that better meet the
demands of both studio and live stage
monitoring situations.
FEATURES
The HDS-16 accepts eight mono and four
stereo inputs from a mixing console and routes
them to each HRM-16 via a 50-pin Centron-
ics cable. This cable also transports the DC
power to each HRM-16 so they do not require
a power cable or “wall wart.” Each HDS-16
has six Centronics outputs on the rear panel,
and additional HRM-16’s can be daisy-chained
together. A maximum of eight HRM-16’s can be
driven from a single HDS-16. Since each HRM-
16 can drive two headphone outputs, sixteen
musicians can be supplied with eight different
mixes from one HDS-16.
The HRM-16 is a 16-channel mixer with a
powerful headphone amplifi er. It also features
a built-in microphone and talkback system that
allows communication between each musician
and the mix engineer in two modes:
■
The Live/Stage Mode (default) allows the
HDS-16 to communicate with all HRM-16’s. All
HRM-16’s with their TALK buttons depressed
can communicate with the HDS-16 but not with
other HRM-16s.
■
The Studio Mode establishes communication
among all HRM-16’s and the HDS-16 much
like an intercom system. The HRM-16 user
presses their TALK button to speak to all other
HRM-16’s and the HDS-16. This mode en-
ables discussion between the musicians and
mix engineer between takes. Turn to page 5 to
see how to change modes.
A solo system allows the engineer to auto-
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HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
matically mute all HRM-16 sends except the
channel D stereo and talkback outputs. This
unique feature allows each musician to hear a
rough or fi nal mix and send soloed tracks from
the mix console. This eliminates the need for
musicians to relocate to the control room or
manually change their HRM-16 level settings.
Note: Both the solo func tion on the HDS-16 and
the talkback system on the HRM-16 can be ac ti -
vat ed man u al ly using their front panel con trols or
by op tion al remote switch es.
ADDITIONAL USEFUL HRM-16
FEATURES INCLUDE
■
local effects send and return;
■
line out (mono);
■
bass and treble shelving EQ controls;
■
talkback level and master volume controls.
HDS-16 HEADPHONE/
AUDIO DISTRIBUTION
SYSTEM
The HDS-16, a 2-U rack-mountable device
normally located near the main mixing console,
provides the power and signal conditioning
for a maximum of eight HRM-16’s. Individual
channel sends from the console connect to the
HDS-16 inputs.
FRONT PANEL
The front panel serves as the patch bay for all
input connections: eight mono and four stereo
¼-inch and TT input connectors. All connec-
tors are balanced and use the Tip/Ring/Sleeve
(TRS) wiring convention. Both ¼-inch and TT
connectors can be used but not for the same
channel. If both con nec tor types are used for
the same channel, the TT connector will be ac-
tive and ¼-inch connector will be disabled.
TALKBACK
Figure 2 shows the TALKBACK connectors at
the far left of the front panel. Connect the mix
con sole’s line-level, talkback-microphone out-
put or cue send to the HDS-16’s ¼-inch INPUT
jack. This signal is distributed to the HRM-16s
on the Centronics cable along with the other
channels. Use the RETURN FROM HRM-16
connector to monitor talkback from the HRM-
Figure 1: HDS-16 front panel
Figure 1: HDS-16 front panel
The front panel is shown above; the TT and ¼-inch input sections are shown in detail in Figure 2
and Figure 4, respectively. Note: Although the POWER indicator LED is located on the far right
of the HDS-16 front panel, the AC power ON/OFF switch is on the rear panel.
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HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
16’s. Talkback is always available from the mix
console and the level can be adjusted with the
HRM-16’s TALKBACK VOLUME control.
There are two talkback modes designed for
live and studio situations:
LIVE/STAGE MODE (DEFAULT)
This mode establishes communication from the
HDS-16 to all HRM-16’s but not between them.
Each HRM-16 user must depress their TALK
button or switch to speak with the HDS-16 but
can always receive from it. The HRM-16 users
will not hear other HRM-16 users or their own
voice. This is useful for live situations where
a single HRM-16 user’s communication with
the mix engineer does not require interaction
between musicians. Live/Stage was selected
as the default mode to eliminate feedback from
adjacent stage monitors.
STUDIO MODE
This mode establishes communication among
all HRM-16’s and the HDS-16 much like an
intercom system. Any HRM-16 user with their
TALK button depressed can speak to all HRM-
16’s and the HDS-16. Each person will also
hear their own voice.This mode is useful to
enable discussion be tween the musicians and
mix engineer between takes.
Figure 2: Detail of HDS-16 front panel: Talkback and TT inputs
Figure 2: Detail of HDS-16 front panel: Talkback and TT inputs
3

HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
Figure 3: Changing the talkback mode inside the HDS-16
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HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
CHANGING THE TALKBACK MODE
A jumper located inside the HDS-16 selects
between two talkback modes.
1. Use a a Phillips screwdriver to unscrew the
middle two screws located near the top of the
front panel and all screws on the top.
2. Remove the top cover. You will see the left-
front corner of the main PCB.
3. Lift the jumper from the J-2 two-pin header and
move it to J-1 to change the talkback mode
from Live/Stage to Studio mode.
SOLO
This feature allows musicians at the HRM-16s
to hear rough and fi nal mixes or soloed tracks
from the recording console without exiting to
control room or manually altering the HRM-16’s
level controls. The HDS-16 solo feature re-
quires patching the mix console’s main or mix
output to the HDS-16’s channel D input.
Note: After using the solo feature to listen to
the main console mix between takes, turn the
channel D level control off (to 0) on all HRM-16s
before resuming recording. It is easy to forget to
turn down channel D because you will still hear
the intended channel mix but the main console
mix will also be present.
Figure 4 shows the solo interface, labeled
CHANNEL D LEFT & RIGHT ONLY because
all HRM-16 outputs are muted when the SOLO
button is depressed except Channel D. A
switch can be plugged into the ¼-inch SOLO
REMOTE SWITCH connector to turn the solo
function on/off. The SOLO ON LED indicator
lights when the solo function is active.
Figure 5: HDS-16 rear panel
Figure 5: HDS-16 rear panel
Figure 4: Detail of HDS-16 front panel:
¼-inch inputs and Solo interface
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HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
Note: The remote and front panel switches
are wired in parallel. Although either switch
can activate the SOLO function, both must
be in the off position to deactivate it.
REAR PANEL
The HDS-16 rear panel has six, 50-pin, Cen-
tronics output connectors for the HRM-16s,
AC-power, and ground switches (Figure 5).
While male-to-male Centronics cables are
available from computer re tail ers, Furman
manufactures superior quality cables with
twisted pair con struction to optimize sound
quality and reject cross-talk interference. We
highly recommend using the 25 twisted pair,
shielded, 25-ft cable supplied with each HRM-
16. Contact Furman for other cable lengths and
linking adapt ers.
Note: The maximum recommended cable run
is 200 ft. See Table 1 on page 8 for information
about cable losses beyond 100 ft.
Push the AC-power switch up to the ON posi-
tion to power the HDS-16.
The GROUND lift switch has two positions:
LIFT: Signal ground is separate from chassis
ground. Earth ground (AC line cord) is con-
nected to the chassis only.
GROUNDED: Signal ground is connected to
chassis ground; use this setting unless there is
hum or noise present.
Note: Be sure all units are turned off before con-
necting an HDS-16 to one or more HRM-16’s.
6
Figure 6: HRM-16 top panel

HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
HRM-16
REMOTE MIXER
The HRM-16s receive their input signals and
power supply entirely through the Centronics
cable from the HDS-16. Eight mono and four
stereo channels can be mixed and monitored
with head phones or sent to a monitor system.
The eight mono channels may be routed to
the EFFECTS SEND output on the rear panel.
The effected signal is returned to the HRM-16
through the stereo effect returns on the rear
panel and blended into the mix with the EF-
FECTS RETURN level control. The HRM-16
can be easily mount ed on a microphone stand
with the thumb screws and clip provided, or
placed on a table or shelf.
TOP PANEL
The top panel provides:
■
Level controls for four STEREO SOURCES;
■
EFFECTS SEND, L/R pan, and level controls
for each of eight mono channels;
■
MASTER volume control;
■
HI and LO shelving EQ controls with 12 dB
boost and cut;
■
TALKBACK VOLUME control, TALK button,
and built-in microphone;
■
EFFECTS RETURN level control.
TALKBACK
Press the TALK button and speak in the direc-
tion of the built-in microphone above the button
(three small holes in the shape of a triangle).
The microphone will pick up voices from up to
six ft away so you do not need to speak directly
into it. Use the TALKBACK VOLUME control to
alter the level of incoming talkback information.
See page 4 for a complete description of the
talkback functions.
REAR PANEL
The HDS-16/HRM-16 system can be connect-
ed in parallel or series without compromising
sound quality or power as long as no more
than four HRM-16s are connected in series
from a single HDS-16 output.
■
Parallel: Each HRM-16 is connected directly to
the HDS-16 in a star con fi g u ra tion.
■
Series: One HRM-16 is connected directly to
the HDS-16 with additional HRM-16’s con-
nect ed together in a daisy chain.
Two, 50-pin, Centronics connectors are located
on the right of the HRM-16’s rear panel:
Figure 7: HRM-16 rear panel
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HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
INPUT FROM HDS-16
This connector delivers the input signals and
power supply from the HDS-16 (parallel) or
from another HRM-16’s OUTPUT TO ADDI-
TIONAL HRM-16’s connector (series).
The remaining rear panel inputs and outputs
are ¼-inch TRS connectors.
■
EFFECTS SEND: Connect this mono output to
an effects processor.
■
EFFECTS RETURN: Use the L input for a
mono return (panned center) or L and R inputs
for stereo effects.
■
LINE OUT: Use this mono, line-level output to
route the HRM-16 to a monitor system. The
LINE OUT and headphone signals are both
affected by the MASTER VOLUME and HI/LO
EQ controls.
■
TALKBACK SWITCH REMOTE: Plug a mo-
mentary switch into this jack to use instead of
(or in ad di tion to) the TALK button.
OUTPUT TO ADDITIONAL
HRM-16’S
This connector carries the same signal sent
to the INPUT FROM HDS-16 connector. Con-
nect this output to another HRM-16’s INPUT
FROM HDS-16 connector to achieve a series
con nec tion. An output that simply replicates the
input is often called input through because the
signal is sent out before being processed in
the device. As a result, the HRM-16’s top panel
controls do not affect the OUTPUT TO ADDI-
TIONAL HRM-16’s signal.
HDS-16 AND HRM-16
PRO TEC TION CIR CUITS
HRM-16
The head phone driver and power supply regu-
lators are protected against over-temperature
and current overloads. The regulated power
delivered from the HDS-16 to the HRM-16 is
protected against over-current by PolySwitch
resettable fuses inside each HRM-16. These
fuses prevent a defective HRM-16 from shut-
ting down the HDS-16 or attached HRM-16s.
Both devices reset au to mat i cal ly after clearing
the fault and removing power to the circuit.
HDS-16
The regulated power delivered from the HDS-
16 to the HRM-16 is protected against shorted
cables by an over-current crowbar circuit. The
affected power supply turns off in response
to an over-current condition. Restore normal
operation by removing the defective cable or
HRM-16 and turn off the power to the HDS-16
for at least 30 seconds.
The AC-line fuse is a 1-Amp Slo-Blo. Replace
it only with a fuse of the same type and rating.
8
Power Loss per
100 feet of Cable
-0.34 dB
693 mW vs. 750 mW
-0.16 dB
746 mW vs. 770 mW
-0.34 dB
257 mW vs. 260 mW
Headphone
Impedance
32
100
�
600
600
Table 1: Centronics cable losses per 100 feet

HDS-16/HRM-16 HEADPHONE DISTRIBUTION SYSTEM
THREE YEAR
LIMITED WARRANTY
Furman Sound, Inc., having its principal place
of business at 1997 South McDowell Blvd.,
Petaluma, CA 94954 (“Manufacturer”) warrants
its HDS-16/HR-16 (the “Product”) as follows:
Manufacturer warrants to the original Pur-
chaser of the Product that the Product sold
hereunder will be free from defects in material
and workmanship for a period of three years
from the date of purchase. The Purchaser of
the product is allowed fi fteen days from the
date of purchase to complete warranty registra-
tion by mail or on-line at the Furman website.
If the Product does not conform to this Limited
Warranty during the warranty period (as herein
above specifi ed), Purchaser shall notify Manu-
facturer in writing of the claimed defects. If the
defects are of such type and nature as to be
covered by this warranty, Manufacturer shall
authorize Purchaser to return the Product to
the Furman factory or to an authorized Furman
repair location. Warranty claims should be ac-
companied by a copy of the original purchase
invoice showing the purchase date; this is not
necessary if the Warranty Registration was
completed either via the mailed in warranty
card or on-line website registration. Shipping
charges to the Furman factory or to an autho-
rized repair location must be prepaid by the
Purchaser of the product. Manufacturer shall, at
its own expense, furnish a replacement Product
or, at Manufacturer’s option, repair the defective
Product. Return shipping charges back to Pur-
chaser will be paid by Manufacturer.
THE FOREGOING IS IN LIEU OF ALL OTH-
ER WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE IM-
PLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PUR-
POSE. Manufacturer does not warrant against
damages or defects arising out of improper
or abnormal use of handling of the Product;
against defects or damages arising from im-
proper installation, against defects in products
or components not manufactured by Manufac-
turer, or against damages resulting from such
non-Manufacturer made products or compo-
nents. This warranty shall be cancelable by
Manufacturer at its sole discretion if the product
is modifi ed in any way without written authori-
zation from Furman Sound. This warranty also
does not apply to Products upon which repairs
have been affected or attempted by persons
other than pursuant to written authorization by
Manufacturer.
THIS WARRANTY IS EXCLUSIVE. The sole
and exclusive obligation of Manufacturer shall
be to repair or replace the defective Product in
the manner and for the period provided above.
Manufacturer shall not have any other obliga-
tion with respect to the Products or any part
thereof, whether based on contract, tort, strict
liability or otherwise. Under no circumstances,
whether based on this Limited Warranty or
otherwise, shall Manufacturer be liable for in-
cidental, special, or consequential damages.
Manufacturer’s employees or representatives’
ORAL OR OTHER WRITTEN STATEMENTS
DO NOT CONSTITUTE WARRANTIES, shall
not be relied upon by Purchaser, and are not a
part of the contract for sale or this limited war-
ranty. This Limited Warranty states the entire
obligation of Manufacturer with respect to the
Product. If any part of this Limited Warranty is
determined to be void or illegal, the remainder
shall remain in full force and effect.
9