Toa M-900MK2 Specifications

THE TOA 900 SERIES are widely

recognized as the industry standard
in installed sound system amplifi­cation. When reliability and per­formance are critical – such as in
paging and music distribution for
airport, hospital, and industrial
sound systems – you can count on
the TOA 900 Series to perform
consistently, day-in and day-out.

The M-900MK2 Mixer/Pre-amplifier
is engineered for high performance
with wide frequency response,
very low noise and distortion,
and excellent output regulation.
Eight module slots allows you to
easily configure custom configu­rations using TOA plug-in modules
with an extensive array of features
and connector types. With the
rear-panel Bridge In/Out jack, you
can increase the input capacity by
connecting a second mixer or
mixer/amplifier. Outputs include
a balanced, transformer-isolated,
line-level output for connection
to an external amplifier and an
unbalanced auxiliary output.

Multiple paging priorities are
easily configured using optional
mute-type modules activated by
external switch-closure or mute­send modules. Other features
include bass/treble controls and
remote master volume terminals.

The M-900MK2 is UL and cUL
Listed and carries a five year
warranty.

 Modular Eight Channel Mixer/Pre-

amplifier for paging, background/
foreground music distribution and
music/messaging-on-hold.

 Proven TOA Quality and Reliability
 Engineered for High Performance

with wide frequency response, very
low noise and distortion, and excel­lent output regulation.

 Eight Module Slots accept any combi-

nation of TOA plug-in modules for cus­tom system configurations.

 Balanced, Transformer-Isolated

Output with selectable impedance,
screw terminal connector and protec­tive cover plate.

 Dual Mute Bus permits multiple levels

of paging priority using optional
mute-type modules.

 External Mute Terminals for activating

mute function with external switch­closure.

 Remote Master Volume Terminals for

control with an external 10k ohm
linear-taper potentiometer.

 Individual Channel and Master

Volume Controls

 Bass/Treble Tone Controls with tone

defeat switch.

 Auxiliary Output for connecting an

external mixer or recording device.

 Bridging Input/Output for input

expansion or recording device.

 Normal, Clip, Power, Protect, and

Signal Indicators provide unit status.

 Rear Panel AC Convenience Outlet for

powering external equipment.

 Turn-On Delay disconnects output

during power-up.

 Over-current and Thermal Protection

Circuitry prevents potential damage
from overload, short-circuit or over­heating.

 Volume Control Security Knobs

Included (4)

 Optional Rack-Mount Kit
 UL / cUL Listed
 Five Year Warranty

H

IGHLIGHTS

O

PTIONAL

A

CCESSORIES

Plug-in Modules (see individual module specifications)
MB-25B Rack-mount Kit (2 RU)
PF-511 Perforated Rack Panel (2 RU)
YA-920 Volume Control Security Knob
900 Series Module Guide available from http://www.toaelectronics.com

900
S

ERIES

M-900MK2
M

IXER

/

P

RE

-A

MPLIFIER

A

PPLICATIONS

A/V Rentals
Airports
Audio/Visual
Auditoriums / Theatres
Banks
Bars / Lounges / Nightclubs
Boardrooms
Business Music
Conference Facilities
Convenience Stores
Educational Facilities
Fitness Clubs / Gymnasiums
Hotels / Hospitality
Houses of Worship
Industrial / Warehouses
Museums
Music Distribution
Offices
Public Address
Restaurants
Retail Stores
Theme Parks
Training Rooms

Type 8-channel mixer/pre-amplifier
Output Power +4 dBm, +20 dBm (max.)
Power Bandwidth 30 - 20k Hz, +20 dBm 0.5% THD

250 - 20k Hz, +18 dBm 0.5% THD

Frequency Response 20 - 20k Hz, ±1 dB
Total Harmonic 0.01% at 1k Hz, rated output

Distortion
Inputs 8 input ports: every port accepts any input module

1 Bridging Input/Output

Input Sensitivity Input port #1 to #8: 100 mV / 10k Ω
& Impedance Bridging Input/Output: 100 mV / 3.3k Ω

Outputs Main: Balanced, 150/600 Ω

Aux: Unbalanced, 10k Ω, 0 dBm

Output Regulation Less than 1.5 dB, no load to full load

(1k Hz)

Dynamic Range Master volume set to min.: 90 dB

(Band Pass: 20 - 20k Hz, Master volume set to max.: 77 dB

with Tone Controls centered)

Tone Controls Bass: ±10 dB at 100 Hz; Treble: ±10 dB at 10k Hz
Indicators Normal, Peak, Power, Protect, and Signal LEDs
Protection Self-protection, with internal AC fuses
Power Consumption 18 W
Temperature Range 12° F to 140° F (-10° C to +60° C)
Color Black
Dimensions (W x H x D) 16.5” x 3.9” x 12.1” (420 x 99.1 x 307.5 mm)
Weight (without modules)

11.7 lbs (5.3 kg)

Other Features Output connects approx. 5 seconds after switching power on.

900 SERIES

MIXER/PRE-AMPLIFIER

Tel: [phone]

Fax:[phone]

www.toaelectronics.com

S

PECIFICATIONS

Visit www.toaelectronics.com to download:
900 Series Architect and Engineering Specifications

900 Series Installation Manual
900 Series CAD Files
900 Series Module Guide

900 SERIES
MIXER/PRE-AMPLIFIER

Tel: [phone]
Fax:[phone]
www.toaelectronics.com

M

ODULE

S

ELECTION

Model Type Description

M-01F MIC Microphone Input Module, Balanced,200 Ω,Lo/Hi-Cut Filters,Female XLR
M-01M MIC Same as M-O1F with Male XLR
M-01P MIC Same as M-O1F with Phone Jack
M-01S MIC Same as M-O1F with Screw Terminals
M-03P MIC Microphone Input Module, HiZ, Unbalanced,50k Ω,Lo/Hi-Cut Filters,Phone Jack
M-11S MIC Microphone Input Module, Balanced, 200 Ω,Lo/Hi-Cut Filters,Mute-Receive,Screw Terminals
M-21S MIC Microphone Input Module, Balanced, 200 Ω,Lo/Hi-Cut Filters, Remote Vol.Control,Screw Terminals
M-41S MIC Microphone Input Module, Balanced, 200 Ω,Lo/Hi-Cut Filters,Mute-Send,Removable Terminal Block
M-51F MIC Microphone Input Module, Balanced,200 Ω,Lo-Cut Filter, Voice Gate,Female XLR
M-51S MIC Same as M-51F with Screw Terminals
M-61F MIC Microphone Input Module, Balanced,200 Ω,Lo/Hi-Cut Filters,Compressor, Female XLR
M-61S MIC Same as M-61F with Screw Terminals
B-01F LINE Balanced Line Input Module, 10k ΩTransformer,Female XLR
B-01S LINE Balanced Line Input Module,10k Ω Transformer, Screw Terminals
B-11S LINE Balanced Line Input Module,10k Ω Transformer, Mute-Receive, Screw Terminals
B-21S LINE Balanced Line Input Module,10k Ω Transformer, Remote Volume Control, Screw Terminals
B-41S LINE Balanced Line Input Module, 10k ΩTransformer,Mute-Send,Removable Terminal Block
L-01F LINE Line Matching Input Module, 600 Ω Transformer, Balanced,Female XLR
L-01S LINE Same as L-01F with Screw Terminals
L-11S LINE Line Matching Input Module, 600 Ω Transformer, Balanced, Mute-Receive,Screw Terminals
L-41S LINE Line Matching Input Module, 600 Ω Transformer, Balanced, Mute-Send,Scew Terminals
U-01F LINE Line Input Module, Unbalanced, 220k Ω,Female XLR
U-01P LINE Same as U-01F with Phone Jack
U-01R LINE Same as U-01F with RCA Jack
U-01S LINE Same as U-01F with Screw Terminals
U-03R LINE Stereo Line Input Module, Lo/Hi-Cut Filters,Stereo Summing Dual RCA Jacks
U-03S LINE Line Input Module, Lo/Hi-Cut Filters, Screw Terminals
U-11R LINE Line Input Module, Unbalanced,220k Ω,Mute-Receive,RCA Jack
U-11S LINE Line Input Module, Unbalanced, 220k Ω, Mute-Receive,Screw Terminals
U-12S LINE Line Input Module, Unbalanced, 220k Ω,Variable Mute-Receive Depth, Screw Terminals
U-13R LINE Same as U-03R with Mute-Receive
U-13S LINE Same as U-03S with Mute-Receive
U-21S LINE Line Input Module, Unbalanced, 220k Ω, Remote Volume Control, Screw Terminals
U-43R LINE Same as U-03R with Mute-Send
U-43S LINE Same as U-03S with Mute-Send
U-61S LINE Line Input Module, Unbalanced, 220k Ω, Compressor, Screw Terminals
E-03R SPECIAL FUNCTION 900 Series Processor Module for F-121C/CM Speakers, Dual RCA Jacks
E-04R SPECIAL FUNCTION 900 Series Processor Module for H-1 Speakers, Dual RCA Jacks
E-05R SPECIAL FUNCTION 900 Series Processor Module for H-2/H-2WP Speakers, Dual RCA Jacks
E-06R SPECIAL FUNCTION 900 Series Processor Module for H-3/H-3WP Speakers, Dual RCA Jacks
E-07S SPECIAL FUNCTION 900 Series Low Pass Filter Output Module for FB-100 and HB-1,Removable Terminal Block
S-01S SPECIAL FUNCTION Signal Generator Module, 1 kHz Sine Wave,Screw Terminals
S-02S SPECIAL FUNCTION Signal Generator Module, Buzzer/Yelp, Screw Terminals
S-04S SPECIAL FUNCTION Signal Generator Module, 8 Selectable Tones, Screw Terminals
T-01S SPECIAL FUNCTION Line Output Module,Balanced,600 Ω, Screw Terminals
T-02S SPECIAL FUNCTION Line Input Module for Music-on-Hold,Unbalanced,220k Ω Input, 600 Ω Balanced Output, Screw Terminals
T-12S SPECIAL FUNCTION Same as T-02S with Input Mute-Receive

TOA E

LECTRONICS

, INC.

601 G

ATEWAY

B

LVD

., S

UITE

300

S

OUTHSANFRANCISCO

, CA 94080
TEL: [phone]
FAX: [phone]

www.toaelectronics.com

900 S

ERIES

M

IXER

/

P

RE

-A

MPLIFIER

The two types of muting modules,MUTE-RECEIVE and MUTE-SEND,have mute function circuitry that connects to two common "MUTE" buses,and one common
"GROUND" bus when installed in an A-900MK2 mixer/amplifier or M-900MK2 mixer/pre-amplifier. A "BUS" is simply an internal wire that connects from module-slot
to module-slot. You can access these buses via rear-panel screw terminals,labeled, "MUTE 1","MUTE 2" and "GND".Mute-type modules connect to both mute buses
"out-of-the-box". You can disconnec t the module's mute function circuitr y from each mute bus by cutting jumper wires on the modules. This allows you to configure
systems with multiple levels of priority.

MUTE-RECEIVE modules respond to mute bus activation in either of two ways:1) Switch Activation: Connecting a switch closure between the "MUTE" (1 or 2)" and
"GND" screw terminals on the rear of the mixer/amplifier activates the mute function circuitry of MUTE-RECEIVE modules connected to the same bus. This is also
referred to as "manual muting". 2) Auto-Mute: When input signal level to a MUTE-SEND module exceeds a user-adjustable threshold, the module's mute function cir­cuitry activates the mute function circuitry of all MUTE-RECEIVE modules connected to the same bus. This is also referred to as "signal-activated muting".

M

UTINGMODULES

900 S

ERIESMODULE

C

HART

Literature Order #: L-M900SERIES

Specifications subject to change without notice.

© 2003, TOA Electronics, Inc.

Microphone

Line Input Modules*

Special

Standard with high/low cut filters M-01F M-01M M-01P M-01S
Mute-Receive with high/low cut filters M-11S
Mute-Send with high/low cut filters M-41S

Voice Gate with low cut filters M-51F M-51S

Compressor with high/low cut filters M-61F M-61S
Remote Volume Control with high/low filters M-21S

Input Modules

For high-Z mic. only w/ high/low cut filters M-03P
Standard, no special features B-01F U-O1P U-01R B-01S
Standard with high/low cut filters U-03R U-03S
Mute-Receive U-11R B-11S
Mute-Receive with high/low cut filters U-13R U-13S

Mute-Receive with variable mute depth U-12S
Mute-Send L-41S B-41S
Mute-Send with high/low cut filters U-43R U-43S

Remote Volume Control
Compressor U-61S

Line output T-01S
Line input with Music-On-Hold (MOH) output T-02S
Line input w/ MOH & input Mute-Receive T-12S
1 kHz Sine Wave test tone S-01S
Buzzer/Yelp signal tone S-02S
Switch-selectable tone S-04S
Equalizer for F-121C/CM Speakers E-03R
Equalizer for H-1 Speakers E-04R

Function Modules

Equalizer for H-2/H-2WP Speakers E-05R
Equalizer for H-3/H-3WP Speakers

Low Pass Filter for FB-100/HB-1 Speakers

Female

L-01F L-01S
U-01F U-01S

Male

1/4”

RCA

XLR

Phone

XLR

Jack

Jack

Dual RCA

E-06R

Jacks

3 Screw

Terminals

L-11S

U-11S

5 Screw

Terminals

B-21S
U-21S

Removable

Terminal

Block

E-07S

*For Line Input Modules: Use "B" modules w/ transformer isolation for balanced/unbalanced sources. Use "L" modules
only for 600 ohm impedance matching. Use "U" for unbalanced sources w/ short cables (≤ 15 feet).