Grimani Systems Delta Speaker User manual

61 Galli Drive, Suite B |Novato, CA 94949, USA |+1.415.883.1476 |[e-mail] |www.grimanisystems.com
Delta Speaker
Installation and Operation Manual
V3
April 25, 2017

Delta Speaker
Installation Manual
1. Unpack the speaker
a. Place shipping box flat, with model and serial number label at the top.
b. Cut packing tape, open the carton, and remove the accessories that are packed into the top foam
protection layer. These include the power cable, the four mounting brackets, and a pack of screws.
c. Carefully remove the top layer of protection foam.
d. Carefully remove the speaker from the carton. Do NOT pull it out by the waveguide
e. Keep the box and packing material in case you need to ship it back for returns, maintenance or
upgrades.
2. Prewire. Power, Signal, and Control network should be prewired to each Delta speaker
a. Power: The Delta is an active speaker with built-in signal processing and amplification. It requires
about 600 Watts of available AC power in the range from 100V to 250V. We recommend prewiring
one 120V-20A circuit, or a 220 / 240V –15A for each group of three Delta speakers, with either a
quad box near the three speakers, or a duplex near each speaker.
b. Audio Signal: The Delta takes Analog Balanced audio signal over twisted pair with braided shield
XLR cable. It is best to prewire for it. An “RCA” unbalanced signal can also be fed to the Delta,
ideally through a balancing transformer as close to the source as possible. Jensen Transformer
makes very good balance adapter transform units. Note that even for unbalanced analog audio
sources it is best to use a twisted pair with shield cable. See the connection section below for
termination recommendations. It is also possible to use Cat5 or Cat 6 cabling to feed a balanced
signal to the Delta, using XLR connectors at the speaker end. A few manufacturers, including
MuxLab (model 500028) and Audio Control (BLD-10) make unbalanced to Cat5 converters which
can be used for unbalanced feeds (see Appendix 2). There may be residual noise interference in
environments with a lot of radio frequency noise. Contact Grimani Systems Technical Support for
further details.
c. Control signal: The Delta is controlled and monitored through a USB interface. Using a USB to Cat5
converter, you can prewire with either Cat5, Cat5e, Cat6, Cat6a cabling from a central location to the
speaker, and add the converter unit at the speaker location. Terminate the Cat5 cables at a patch
panel at the equipment rack or other room location accessible during calibration. In all cases prewire
using Keystone punch-down connectors at wall plates or rackmount locations at the rack and
speaker locations. Test the connection using a certification meter to assure quality of connection and
bandwidth. The last interface should be accomplished with factory terminated and certified patch
cables.

3. Mounting Bracket. The Delta is designed to be installed on a wall, using the supplied the four supplied
hanging bracket. For placement behind acoustically transparent screens, paint
the brackets flat black before installation in order to control light refelctions.
a. Place the speakers correctly in the room. Set the speaker position on the
wall based on several factors: Position spread relative to the listener;
position relative the screen edge or center; boundary reflection conditions.
Set the height such that the middle of the waveguide is 6 inches above
seated ear height, or at the middle of the screen. Grimani Systems
Technical Support can assist with determining the best position upon
request.
b. The wall fastener location of the top pair of brackets will be 8 inches (203
mm) below the top of the waveguide, and 6-3/8” inches (162 mm) from
the center of the speaker. See diagram below.
c. The wall fastener location of the bottom pair of brackets will be 23.25 inches (591 mm) below the
top of the waveguide, and 10.5 inches (267mm) from the center of the speaker. See diagram below.
d. Install the four vibration isolation L brackets on the speaker, using the supplied screws (#6 x 1/2”).
Do not overtighten the screws in order to avoid stripping them.
e. Mark four wall hole locations for the mounting bracket, based on a. and b. above. Use the bracket as
a template, and make sure that it is vertical by using a bubble level.
f. Choose appropriate fasteners. The Delta weighs 35 lbs (16kg), so each fastener will need to be rated
for 9 pounds (4kg) each. For sheetrock walls, we suggest using EZAnchors and their associated
screws. For Concrete walls, we suggest using good quality wall anchors and screws. For plywood
surfaces, wood screws in a size 8 (4mm) and above will work well.
g. Holding the speaker from the wood cabinet (NOT the waveguide), pick it up and hold it in place while
driving the four screws through the large bracket hole into the wall. Make sure that the speaker is
properly centered.
h. Speaker aiming: The speaker can be aimed up or down by adding a shim behind the top or bottom
brackets.
23.25”
8”
6 3/8”
10.5”

4. Connections
a. Power: The Delta ships with a 9 foot (2.75m) long locking detachable IEC power cable. The receptacle
is on the connector plate at the bottom of the speaker. Plug the cable there, then to the mains
outlet. To remove the ICE cable from the speaker, pull back the red locking pin before easing out the
plug. After powering up the speaker, it will go through a few seconds of start-up sequence. There is
no standby switch.
b. Audio signal. Plug in the audio feed:
- - For Analog balanced over twisted pair cable with shield, terminate the cable to a male XLR plug,
using Pin 2 for +, Pin3 for -, and Pin 1 for ground/shield. Connect the XLR plug into the XLR Analog
female input, labeled (INPUT). See Appendix 1.
- For Analog unbalanced sources, it is also best to pre-wire with twisted pair with shield. On the
source side, use a balancing transformer (either passive or active). If a balancing transformer isn’t
available, connect the + signal to the + wire (usually Red) of the pair, and connect the source
ground to the –wire (usually Black) of the pair. On the speaker side, terminate the cable with a
male XLR plug, with Pin 2 for the + wire, Pin3 for - wire, and Pin 1 for the shield of the wire (See
Appendix 1). If you used regular coaxial wire, from the source, terminate the wire to a Male XLR
plug with Pin 2 for the + wire, Pin3 and Pin 1 for the shield of the wire. If there is a hum loop, try
disconnecting Pin 1 on the XLR plug. If the coaxial wire is already terminated with and RCA
connector, you can use a female-to-male XLR converter plug.
Power
In
Main
Level
Analog
Audio In
USB Control Port
Processing
Preset
Select
Analog Audio
through Out

You can also use Cat5 cable with a balancing converter unit such as the MuxLabs 500028, as shown
in Appendix 2, or the Audio Control BLD-10.
c. Control signal:
- The Delta is controlled and monitored through a USB interface (see 2.c above.). Assuming that you
prewired to a wall-mounted or rack-mounted keystone punch-down RJ45 receptacle, connect a
premade factory-terminated and certified patch cable, to the Cat5 to USB adapter, and plug this to
the speaker. Tie back the USB cable with a zip tie in order to prevent it from falling off. If you didn’t
prewire to a punch-down receptacle, carefully terminate the network cable with a male RJ45, using
EIA T568B standard, and ensure proper connection and strain relief. Test the connection with a
certification tester to ensure proper connectivity.
d. The Delta has an analog audio through output on a male XLR in order to feed another speaker

5. Settings
a. AC Voltage is automatically set for a range from 100V AC to 250V AC. There is nothing to set.
b. EQ preset. The Delta ships with a response curve that is voiced for the most typically neutral voicing
in-room. This is mostly flat anechoic response for both the axial and sound power frequency
response. This is stored into Presets 1 through 4. After installation, you can equalize and voice each
speaker to match the room, and store one or more EQ curves in one of the four presets. You can
switch between the presets by pressing the preset button on the connector plate at the bottom of
the speaker.
c. Input Volume. Set the volume knob to middle detent gain (0dB).
d. DSP programming. The Delta speaker includes a DSP engine with 5 bands of response tailoring, plus
several other signal processing functions. These are programmed through a computer application,
and requires advanced control by a factor trained professional. Contact Grimani Systems for DSP
programming and system calibration services.
6. Remote Monitoring
The Delta speaker can be tested and verified from a remote location. You will need to dedicate a small
Windows computer to be left enabled on an internet connection. It will need to run the Grimani Systems
Armonia control application as well as a remote desktop application. Both of these can be set up by a
Grimani Systems factory technician.
7. Limited Warranty
The Delta is warrantied to be free of manufacturing defects for a period of two years from the date of
purchase. This limited warranty does not apply to failures due to misuse, excessive sound pressure,
damage from handling and carriage, or any other defects that are outside the control of Grimani
Systems, LLC. Any warranty claim will need to be made directly with Grimani Systems, or through one of
its authorized dealers. An RMA number will need to be issued before any return is authorized.

Appendix 1
Balanced Analog Wire connection
Unbalanced to Balanced Analog Wire connection

Appendix 2
MuxLab 500028 Wiring Diagram
For use in driving unbalanced signals to XLR inputs of speakers
One Balun can be used to drive two speakers
From White
RCA Input
XLR Male to
speaker 1 input
Pin 3
Pin 1
Pin 2
Pin 3
Pin 1
Pin 2
XLR Male to
speaker 2 input
Cat5
Cable
From Red
RCA Input