Biamp SPM723 User Manual

SPM723

Programmable

Stereo Preamp/Mixer

Operation Manual

Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. [phone] www.biamp.com

an affiliate of Rauland-Borg Corp.

print update

September 7, 2005

TABLE OF CONTENTS

Front & Rear Panel Features

Setup

Logic Inputs

Logic Outputs

RS-232 Control

Specifications & Block Diagram

Warranty

pgs. 2 & 3

pgs. 4~13

pg. 14

pg. 15

pgs. 16 & 17

pg. 18

SPM723

INTRODUCTION

The SPM723 provides seven stereo line inputs, two mono mic/line inputs, and
three stereo outputs. Complete programmability and control of the SPM723
includes independent left/right levels for each input and output, mic/line routing
& priority, automatic/manual program ducking, mic/line & output tone
adjustment, and 16 memory presets. The SPM723 is extremely versatile, with
software customized setup, making it ideally suited for many applications
including meeting rooms, restaurant/bars, and retail stores.

SPM723 features include:

♦ settings programmed via BiampWin PC control software

♦ seven stereo line inputs, with individual volume & mute

♦ ‘surround sound’ support assigns input 6 to the aux output

♦ input 7 assignable stereo unbalanced or mono balanced

♦ input 7 'override' select via external switch or input signal

♦ two balanced mic/line inputs, with HPF & phantom power

♦ mic/line inputs include individual trim, tone, volume & mute

♦ stereo input ‘ducking’ via external switch or mic/line signals

♦ separate left/right or stereo ‘ganged’ faders on all inputs

♦ independent stereo main & stereo zone balanced outputs

♦ balanced stereo aux output, with independent source select

♦ outputs include 3-band, mid-sweep stereo tone adjustment

♦ outputs independently assignable for stereo/mono operation

♦ separate left/right or stereo ‘ganged’ faders on all outputs

♦ signal level meters on input 7, mic/line inputs, & all outputs

♦ mixing of multiple input signals or selection of single source

♦ store & recall up to sixteen non-volatile memory presets

♦ remote control via RS-232 & programmable logic inputs

®

♦ Windows

95/98/NT/2000/XP software & cable included

♦ incorporates AES recommended grounding practices

marked and UL / C-UL listed power source

♦

♦ covered by Biamp Systems' five year warranty

1

FRONT & REAR PANEL FEATURES

FRONT PANEL FEATURES

Activity LED: This red LED indicates when control information is
being received via RS-232.

On Indicator: When the power transformer is plugged in, and AC

power is applied to the SPM723, the red On indicator remains lit.
When power is removed, all 'current' settings (sources, levels,
tone, etc.) will be stored in non-volatile memory and recalled when
power is restored. During Setup the SPM723 may instead be set
to always recall Preset #1 when power is turned back on (see
Setup on pg. 10).

SPM723

onactivity

REAR PANEL FEATURES

AC Power Cord: The power transformer provides 27 Volts AC to

the SPM723, and is detachable via a 5-pin DIN connector. The
SPM723 has two internal ‘self-resetting’ fuses (there are no user
serviceable parts inside the unit). If the internal fuses blow, they
will attempt to re-set after a short period. However, this may be an
indication that the SPM723 requires service.

Serial Port: This 9-pin Sub-D (male) connector provides an RS­232 Serial Port for remote control via computer or third-party
controllers (see RS-232 Control on pg. 16). The Serial Port has
the following pin assignments (left-to-right & top-to-bottom): Pin 1)
not used; Pin 2) Receive Data (RxD) input; Pin 3) Transmit
Data (TxD) output; Pin 4) Data Terminal Ready (DTR) output;
Pin 5) Ground; Pin 6) not used; Pin 7) Request To Send (RTS)
output; Pin 8) not used; Pin 9) not used. BiampWin software
and a null-modem cable are provided for programming (see Setup
on pg. 4). NOTE: The Serial Port can also transmit commands

received via the Logic Inputs (see Setup on pg. 9).

Link Port: This 9-pin Sub-D (female) connector provides a Link

Port for RS-232 control of multiple BIAMP products (see RS-232
Control on pg. 16). The Link Port of one device simply connects to
the Serial Port of the next device (and so forth). Link cables are
available as an option (Biamp #909-0057-00). NOTE: All but the

final device in a system should have the Link Switch pressed in
(see below). The Link Port has the following pin assignments

(right-to-left & top-to-bottom): Pin 1) not used; Pin 2) Transmit
Data (TxD) output; Pin 3) Receive Data (RxD) input; Pin 4) not
used; Pin 5) Ground; Pin 6) not used; Pin 7) not used; Pin 8)
not used; Pin 9) not used. NOTE: The Link Port will also

transmit commands received via the Logic Inputs (see Setup on
pg. 9).

Link Switch: The Link Switch is used when connecting multiple
devices in a ‘Link Port to Serial Port’ configuration (see Link Port
above). From the factory, the Link Switch is released (out). When
connecting multiple devices, the Link Switch must be depressed
(in) on all devices except

the final device in the system (the device

with no Link Port connection).

2

FRONT & REAR PANEL FEATURES

RL L R

zone output main output

27V

~

50/60 Hz
27 watts

class 2 wiring

SPM

723

serial port

link port link

logic outputs

logic inputs

Logic Outputs: This 9-pin Sub-D connector provides Logic
Outputs 1~8 (see Logic Outputs on pg. 15). Logic Outputs may
be used to control external switching circuits, such as relays or
other BIAMP products. These outputs are typically used to
provide simultaneous audio & video source selection, by
controlling an external video switching device.

Logic Inputs: This 9-pin Sub-D (female) connector provides
eight logic inputs for controlling the SPM723 via contact­closures (see Logic Inputs on pg. 14). Logic Input functions are
programmed via software (see Setup on pg. 9). NOTE: From

the factory, Logic Inputs 1~8 have no pre-programmed function.

Main & Zone Outputs: These plug-in barrier strips provide the
balanced stereo line-level Main & Zone Outputs. For balanced
output, wire high to (+), low to (-), and ground to (
unbalanced output (-6dB gain), wire high to (+) and ground to

d

(

), leaving (-) unconnected. Main & Zone Outputs can be set
for stereo or mono operation, and include signals from Line
Inputs 1~7 and Mic/Line Inputs 1 & 2, as determined via
software (see Setup on pg. 4).

Aux Output: This plug-in barrier strip provides the balanced
stereo line-level Aux Output. For balanced output, wire high to
(+), low to (-), and ground to (
gain), wire high to (+) and ground to (

d

). For unbalanced output (-6dB

d

), leaving (-)
unconnected. Aux Output can be set for stereo or mono
operation, and includes signals from Main & Zone Outputs, as
determined via software (see Setup on pg. 7).

d

). For

L R

aux output

override

sig pres

L R

line

inputs

L

R

L

R

L

R

mute

sig pres

mute

sig pres

1234567override

mic/line 2

mic/line 1mute mute

Line Inputs 1~6: These RCA connectors provide the
unbalanced stereo Line Inputs 1~6.

Line Input 7: This plug-in barrier strip provides the unbalanced
stereo Line Input 7. Line Input 7 can instead be set for balanced
mono input, via software (see Setup on pg. 4).

Override: This plug-in barrier strip provides Line Input 7
Override, which is a priority selection of that input over all other
stereo line inputs. Wiring (sig pres) to (override) causes
automatic override whenever signal is present at Line Input 7.
Manual override instead uses a contact-closure wired between
(override) & (

d

). Override functions are determined via

software (see Setup on pg. 13).

Mic/Line Inputs 1 & 2: These plug-in barrier strips provide the
balanced mono inputs for Mic/Line 1 & 2. For balanced input,
wire high to (+), low to (-), and ground to (
input, wire high to (+), and ground to both (-) & (

d

). For unbalanced

d

). Mic/Line 1

& 2 functions are determined via software (see Setup on pg. 6).

Mute: These plug-in barrier strips provide for ‘talk-over' ducking
of the stereo line input signals. By wiring (signal present) to
(mute), automatic ducking will occur whenever signal is present
at the respective Mic/Line Input. Manual ducking instead uses a
contact-closure wired between (mute) & (

d

). Mute functions are

determined via software (see Setup on pgs. 11 & 12).

3

SETUP

SPM723 parameters are all adjustable using the BiampWin software and null-modem cable provided with the unit. The BiampWin software
provides programs for various BIAMP products, including the SPM723. The SPM723 program includes seven
described on the following pages. Once the software is started (and Comm Port Configuration is set), the control screens are accessed via
the drop-down menus at the top of the opening screen. The Mix
Main Program
Definitions, Logic Input Definitions, & Configuration Options. The File menu provides functions such as save, open, download, etc. The
Settings
available adjustments. To install BiampWin Software
System Requirements

, Zone Program, Mic/Line 1 / Mic/Line 2, & Aux Output. The Configure SPM723 menu offers additional screens for Button

menu recalls the Comm Port Configuration screen. The Window menu arranges active product screens. The Help menu explains

: Select ‘Run’ from ‘Start’ menu, and browse to 'BiampWin' on appropriate drive.

: Windows® 95/98/NT/2000/XP with 8MB of available hard disk space (serial port required for ‘on-line’ operation).

screen appears whenever an SPM723 file is opened, and it has four tabs:

control screens, which are

MAIN PROGRAM SCREEN

The Main Program
on each input can be assigned for separate left/right or stereo ganged operation. Line Input 7 includes a signal level meter, and can be
assigned as either a normal unbalanced stereo line input or as a special balanced mono line input. The Main Output section also provides
faders which can be assigned for separate left/right or stereo ganged operation, and includes a mute button, a 3-band mid-sweep EQ, and
a signal level meter. In addition, the Main Output may be switched from stereo operation to mono operation (a mono sum of the left/right
signals then appears at both outputs). The bottom of the screen shows on/off status of the eight Logic Inputs and the eight Logic Outputs.
Sixteen buttons are provided for recalling non-volatile memory presets. A separate Store button provides a menu for storing settings into
the sixteen memory preset locations. Presets contain settings affecting all inputs/outputs. The title bar at the top of the Mix screen shows
Device #, custom Device Name, & model of product being controlled. BiampWin software can operate ‘off-line’ (no product connected) by
opening a ‘new’ file for the desired product. The Device # for ‘off-line’ files is assigned sequentially as a negative number.

tab on the Mix screen provides level faders & mute buttons for mixing Line Inputs 1~7 to the Main Output. The faders

4

SETUP

ZONE PROGRAM SCREEN

The Zone Program
on each input can be assigned for separate left/right or stereo ganged operation. Line Input 7 includes a signal level meter, and can be
assigned as either a normal unbalanced stereo line input or as a special balanced mono line input. The Zone Output section also provides
faders which can be assigned for separate left/right or stereo ganged operation, and includes a mute button, a 3-band mid-sweep EQ, and
a signal level meter. In addition, the Zone Output may be switched from stereo operation to mono operation (a mono sum of the left/right
signals then appears at both outputs). The bottom of the screen shows on/off status of the eight Logic Inputs and the eight Logic Outputs.
Sixteen buttons are provided for recalling non-volatile memory presets. A separate Store button provides a menu for storing settings into
the sixteen memory preset locations. Presets contain settings affecting all inputs/outputs. The title bar at the top of the Mix screen shows
Device #, custom Device Name, & model of product being controlled. BiampWin software can operate ‘off-line’ (no product connected) by
opening a ‘new’ file for the desired product. The Device # for ‘off-line’ files is assigned sequentially as a negative number.

tab on the Mix screen provides level faders & mute buttons for mixing Line Inputs 1~7 to the Zone Output. The faders

5

SETUP

MIC/LINE 1 / MIC/LINE 2 SCREEN

The Mic/Line 1 / Mic/Line 2
Zone Outputs. The faders on each input can be assigned for separate left/right or stereo ganged operation. Each Mic/Line Input includes
adjustable Gain, with a Peak indicator and a signal level meter. Gain adjusts the input to compensate for different signal levels. For best
performance, adjust Gain so the Peak indicator flashes on occasional peaks in signal level (8dB before clipping). Each Mic/Line Input also
includes selection boxes for Enable, High Pass Filter, & Phantom Power. Enable Main allows that Mic/Line Input signal to be available for
mixing to the Main Output. Enable Zone allows that Mic/Line Input signal to be available for mixing to the Zone Output. NOTE: Enable
Main & Enable Zone also affect the ability for the associated Mic/Line input to initiate ‘ducking’ (see Miscellaneous Screen on pg. 10). High
Pass Filter reduces the Mic/Line Input low frequency signals 6dB/octave @ 110Hz. Phantom Power turns on +24 Volt at the Mic/Line
Input, for powering condenser mics. EQ provides Bass & Treble equalization (tone control) for each Mic/Line Input. Main Mic Priority
selects which Mic/Line Input (if any) shall have priority over the other Mic/Line Input, at the Main Output. Zone Mic Priority selects which
Mic/Line Input (if any) shall have priority over the other Mic/Line Input, at the Zone Output. NOTE: Mic/Line Input signals are mixed to the

outputs ‘post-fader’. Therefore, Main/Zone Output EQ and fader settings do NOT

The bottom of the screen shows on/off status of the eight Logic Inputs and the eight Logic Outputs. Sixteen buttons are provided for
recalling non-volatile memory presets. A separate Store button provides a menu for storing settings into the sixteen memory preset
locations. Presets contain settings affecting all inputs/outputs. The title bar at the top of the Mix screen shows Device #, custom Device
Name, & model of product being controlled. BiampWin software can operate ‘off-line’ (no product connected) by opening a ‘new’ file for the
desired product. The Device # for ‘off-line’ files is assigned sequentially as a negative number.

tab on the Mix screen provides level faders & mute buttons for mixing Mic/Line Inputs 1 & 2 to both the Main &

affect Mic/Line Input signals which appear at the outputs.

6