Toa M-1212E User manual

TOA PROFESSIONAL SOUND SYSTEM
STEREO-MIXER
M-1264/M-1212E
Rack Mount Stereo Mixers
M-1264
M-1212E
FEATURES
1. Matrix mixing of mono and stereo inputs to up to six
separate outputs.
2. four true stereo inputs--one input knob controls both
left and right channels.
3. Mic/Line inputs with a built in compressor on each to
prevent input/output clipping.
4. High pass filter on mic inputs for speech applications.
5. Remote control of the Stereo and Group outputs using
momentary up/down switch contacts.
6. Connectors include XLR for balanced in/outs and, RCA
and 1/4” for unbalanced in and outs.
7. Back panel switch for using either stereo output as a
sub-group or the Group out as additional sub input to
the Stereo output.
8. Front panel headphone jack.
9. Occupies only 2 rack spaces.

DESCRIPTION
TOA’s M-1264 is a true stereo, matrix mixer only 2 rack
spaces high, that is economical and simple to operate yet
has a great deal of versatility. Its many unique features and
functions solve some long-standing design problems in a
variety of commercial systems that require mixing and
matrixing a combination of mono and ever increasing
number of stereo audio sources to single and multiple
outputs. Sometimes stereo sources need to be summed to
mono and mono sources fed to L/R outputs. These sources
may need to feed separately controlled, multiple outputs,
some stereo and some mono, that often require different
combinations or selections of the inputs. The M-1264 can
handle all of this and more. The companion M-1212E, also
2 rack spaces, is a simplified version of the M-1264,
intended as an expander for the M-1264, but it can also be
used as a stand alone, matrix mixer. Both are backed by
TOA’s long tradition of reliability and performance.
Essentially the M-1264, in its 2 rack spaces, can be easily
set up to function as anything from a single mono or stereo
mixer to up to FIVE independent mono mixers (with a sixth
somewhat dependent mixer). For example, in a health club
the M-1264 can simultaneously and separately control:
stereo disco in the aerobics room, pop music in the weight
room, classical in the pool and the easy listening station in
the locker rooms and reception, plus selective paging to all
areas, including an emergency page mic from each
location back to a speaker in the reception desk.
This kind of multi-tasking capability, in a single unit, is
perfect for a variety of systems including boardrooms,
conference rooms, discos, health clubs, restaurants, offices,
background music systems, music clubs, and hotel
systems. For example it is a great mixer for multi-media
portable systems or as an outboard mixer for touring
systems, taking up only one input on the main console for 4
stereo sources plus six additional mic inputs. In hohel
systems, it can function as an economical, manually
controlled ballroom combiner for up to four rooms. It is
ideal for multi-zone background music/paging systems.
You can even use it to set up four zones of mix-minus-one
microphone mixing, with program and selected mic inputs
to all zones, plus a fifth output with a sum of all the inputs.
The M-1264 has 5 sets of outputs, each with their own level
control: Stereo main, stereo Group, mono Aux, stereo Cue/
Monitor, and a Sum output (provides a mono mix of the
main Stereo output). The Stereo and Group, while still
providing their own output signals, can be alternately
assigned to each other as a sub-group using a rear panel
switch. The Cue/Monitor output can be used for monitoring
the Stereo output or it can function as an independent mixer
using the cue bus, or it can be used as a L/R mono Cue to
pre-listen to any combination of inputs-a must for discos
or live mixing.
The M-1264 has 11 sets of inputs: 6 electronically
balanced, mono Mic/Line inputs, 4 unbalanced, stereo/
mono Line inputs and a stereo/mono “sub” line input that
feeds the Stereo mixing bus. Each of the first 10 inputs is
controlled by a single front panel knob. The Mic/Line
(using a Left/Center/Right switch) and Line inputs are
always assigned to either the Group or Stereo outputs and
can be independently assigned to the Aux and Cue
outputs. All inputs have an On/Off switch that shuts off the
signal to the Stereo and Aux outputs but not the signal
assigned to the Cue output. A bonus feature is that a
mono source plugged into only the right channel of any
stereo input is automatically fed to the left input as well.
Each Mic/Line input has a built in automatic compressor
with a front panel indicator that activates about 3dB below
internal clipping. This not only serves as an excessive
signal indicator but can virtually eliminate input and output
overloads. These inputs also feature switchable phantom
power and a switchable high pass filter in microphone
mode to reduce directional microphone proximity effects.
Optional input transformers are available if needed for long
wire runs or ground isolation.
More features of the M-1264 include up/down remote
control (using momentary contact switches) of the
motorized Stereo and Group output volume controls.
There is even a ramped 5VDC output for a remote visual
level indicator. A front panel headphone jack is also
provided, fed from the Cue/Monitor output.
The companion M-1212E can be used as a stand-alone
mixer or sub-mixer. Its 12 Mic/Line inputs are identical to
the M-1264, with the same assignment capabilities.
It has six mix buses each feeding a line output, but without
output level controls: Stereo main, stereo Group, mono Aux
and mono Cue. Unlike the M-1264, there is no sub-group
switching for the stereo outputs or sub input. When used
as an expander, a supplied bus link cable allows linking
single or multiple M-1212E’s to an M-1264. When the units
are linked together, all the mix buses are connected and
therefore carry the same signal. In this way multiple
isolated outputs for each mix bus are available-one on
each of the linked units.
Both units are provided with a security cover and 19” rack
mount hardware.

SPECIFICATIONS SPECIFICATIONS
Model No. M-1264
PERFORMANCE
Total harmonic distortion
StereoLine Under 0.01%
(1kHz +4dBm) Mic/Line Under 0.15%
Noise level below -100dB
Master at max, all others min Better than -98dB
Master and one mic in at max Better than -62dB
INPUT & OUTPUT
Nominal input level, impedance
Stereo Line -10dB, 50k ohm (unbalanced)
Stereo Sub in
+4dB, 10k ohm (unbalanced)
Mic/Line (mic)
-60dB, 1k ohm (electronically, balanced)
Mic/Line (line)
-10dB, 50k ohm (electronically, balanced)
Nominal output level, load
Stereo, Sum
+4dB, 600 ohm (electronically, balanced)
Group Aux, monitor
+4dB, 1k ohm (unbalanced)
Maximum input level
Stereo Line
+6dB
Mic/Line (mic)
-20dB
Mic/Line (line)
+30dB
Maximum output level (all) +20dB
Max voltage gain to Stereo
Stereo Line
14dB
Mic/Line (mic) 64dB
Mic/Line (line) 14dB
COMPRESSOR (Mic/Line)
Attack/release times Dependent on signal characteristics
Limiting threshold Internally fixed at +17dB
Limiting ratio Approximately 10:1 “Soft knee” threshold
STANDARD ACCESSORIES
Security cover 1
Transformer mounting stud 3 pair
Sparefuse: 1
Rack screws [metric] 4
PANEL FUNCTIONS (FrontPanel)
Operating controls
Input
Level control
(per input channel)
Assign Group/Stereo
Aux assign On/Off
Cue assign On/Off
Chan switch Chan on/off
Mic/Line inputs only
L/C/R
Left/center/right assign
Output level controls Stereo L/Rlevel
Group L/Rlevel
Sum
L/R Stereo sum level
Aux Mono level
Monitor L/R Monitor or mono
Cue level
Operating controls
Power On/Off
(common to all)
LED indicators
Chan SW (Mic/Line) Green = channel on
(per input channel)
Red = signal exceeds
compressor threshold
Chan SW (ST. Line) Yellow = channel on
LED indicators Power
On
(common to all) Cue On when any channel
cue sw is on
PANEL FUNCTIONS (RearPanel)
Rear panel send switch
Off No Grp/Stereo link
Stereo to Group Stereo o/p to Grp bus
Group to Stereo
Pre
Grp o/p to Stereo bus
Post
Grp o/p to Stereo post
Stereolevel
Ground loop break switch Norm/Lift
POWER
Power requirements AC Mains, 50Hz/60Hz
Power consumption 25W (120V AC version)
28W (220/240V AC version)
Fuse: 1.5A 120V/T 0.315A 220/240V
PHYSICAL
Finish Black
Dimensions 482.6W x 88.4H x 311.8D mm
(19W x 3.48H x 12.16D in.)
Weight
5.2kg (11.5lbs.)
Model No.
M-1212E
PERFORMANCE
Total harmonic distortion
Mic/Line Under 0.15%
(1kHz +4dBm)
Noise level below -94dB
One mic in at max Better than -62dB
INPUT & OUTPUT
Nominal input level, impedance
Mic/Line (mic)
-60dB,1kohm (electronically,balanced)
Mic/Line (line) -10dB, 50k ohm (electronically, balanced)
Nominal output level, load +4dB, 1k ohm (unbalanced)
(all outputs)
Maximum input level
Mic/Line (mic) -20dB
Mic/Line (line) +30dB
Maximum output level (all)
Max voltage gain
Mic/Line (mic) 64dB
Mic/Line (line) 14dB
COMPRESSOR (Mic/Line)
Attack/release times Dependent on signal characteristics
Limiting threshold Internally fixed at +17dB
Limiting ratio
Approximately 10:1 “Soft knee” threshold
STANDARD ACCESSORIES Security cover 1
Transformer mounting stud 6 pair
Sparefuse: 1
Rack screws [metric] 4
PANEL FUNCTIONS (FrontPanel)
Operating controls Input Level control
(per input channel) Assign Group/Stereo
Aux assign On/Off
Cue assign On/Off
Chan switch Chan on/off
L/C/R Left/center/right
Operating controls Power On/Off
(common to all)
LED indicators
Chan SW
Green = channel on
(per input channel)
Red = signal exceeds
compressor threshold
LED indicators Power
On
(common to all)
PANEL FUNCTIONS (Rear Panel)
Ground loop break switch
POWER
Power requirements
Power consumption
PHYSICAL
Finish
Dimensions
Weight
‘Specifications are subject to change without notice.
NOTE:0dB=0,775V RMS
+20dB
Norm/Lift
AC Mains, 50Hz/60Hz
26W (120V AC version)
28W (220/240V AC version)
Fuse:1.5A120V/T0.315A220/240V
Black
482.6W x 88.4H x 311.8D mm
(19W x 3.48H x 12.16D in.)
5.2kg (11.5lbs)
*Specifications are subject to change without notice NOTE: 0dB=0,775V RMS

ARCHITECT’S AND ENGINEER’S SPECIFICATIONS
M-1264 Stereo Mixer
The mixer shall have six mono Mic/Line inputs, four Stereo/Mono Line
inputs and a stereo Sub (bus) input; Stereo Out, Stereo Group, Stereo
Monitor (mono in Cue mode) outputs; mono Sum and Auxiliary outputs.
The mixer shall have six mixing buses: L/R Stereo, L/R Group, Aux and
Cue. It shall incorporate all solid state circuitry. Stereo and Sum power
outputs shall be nominal +4dB (maximum +20dB) into a 600 ohm load,
electronically balanced at less than 0.15% THD Mic/Line input, 0.01%
THD Stereo/Mono Line inut at +4dB nominal output at 1kHz. Group,
Monitor and Auxiliary power outputs shall be similarly rated into a 1k
ohm load, unbalanced.
Nominal input sensitivity shall be: Mic/Line input 0.8mV/0.25V
1k/50k ohm input impedance, electronically balanced; Stereo/Mono
Line 0.25V, 50k ohm input impedance; stereo Sub 1.23V 10k ohm input
impedance, unbalanced. Gain shall be mic 64dB, line 14dB, Sub input
0dB all to Stereo Output. Hum and noise shall be at least 98dB below
nominal output (master volume at maximum, all other level controls
minimum) and 62dB below nominal rated output (master volume and one
mono input maximum), IHF-A. Frequency response shall be +0/-1.5dB
(ref. 1kHz) from 20Hz to 20kHz at any power up to rated output.
Each Mic/Line input shall provide +24V phantom power with an
internal On/Off switch. Each shall also have a built in compressor
circuit that activates at 3dB below maximum level with a “Soft Knee”
threshold and approximately a 10:1 limiting ratio. The circuit shall
protect the mixer from being driven into output clipping by excessive
input levels. The Mic/Line inputs unit shall accept optional input
(LT-101 10k: 10k ohms; LT-102 600:600 ohms) isolation transformers.
the transformers shall mount easily and securely inside the unit with the
machine screws provided. Electrical connection to the unit shall be
easily accomplished by means of flexible wires with locking connectors.
The front panel shall have: POWER On/Off switch; stereo PHONES
jack; ten input level controls; STEREO, GROUP, SUM, AUX and
MONITOR output level controls. STEREO and GROUP controls shall
be motorized and remotely controllable. Each Mic/Line input channel
hall have L/C/R (Left/Center/Right), GR/ST (Group/Stereo), AUX and
CUE assign switches. Each line input channel shall have GR/ST
Group/Stereo), AUX and CUE assign switches. Each input shall have a
combination channel On/Off switch indicator that when the channel is on
lights green for the mono inputs, yellow for stereo inputs and red when
the compressor circuit is activated (mono inputs only). The channel
On/Off switches shall not affect the CUE signal. The CUE shall
connect the selected channel’s signal to the cue bus and automatically
witch the monitor from the Stereo Output to the cue bus. The front
panel shall also have a POWER On and CUE Activated indicator.
The rear panel shall have an input level select switch for each Mic/Line
input for mic, line or mic HPF. There shall be a 4 position STEREO/
GROUP link switch for assigning: Stereo to Group, Group to Stereo Pre
(pre Stereo Output level), Group to Stereo Post (post Stereo Output
level) and Off. Both the Stereo and Group Outputs shall otherwise
function normally in any switch position.
The rear panel shall have the following: 6 XLR-F jacks for Mic/Line
puts, 4 pairs RCA type jacks for Stereo/Mono Line inputs; 1/4” TS
jacks for Sub inputs; XLR-M jacks for Stereo, and Sum outputs; 1/4”
TS jacks for group Aux and Monitor outputs: barrier strip type screw
terminals for Stereo and Group Output remote volume control that
shall use momentary switch closures for volume up/down functions;
terminals for each control that output 0 to +5VDC depending on
control position. A BUS LINK IN connector shall providing linking
of all mixing buses, plus the cue control bus, between a TOA M-1212E
Expansion Mixer and the M-1264. There shall be a fuse holder with a
replaceable AC mains fuse.
AC line mains shall be 50/60Hz. Power consumption at rated output
shall be 25W (28W 220/240V). The mixer shall be enclosed in a
durable, painted, black, 1mm (.04 in.) steel enclosure, mechanically
reinforced by a 2.0mm (0.08 in.) thick, black anodized, aluminum front
panel. Overall dimensions shall be 482.6W x 88.4H x 311.8D mm
(19.0W x 3.48H x 12.16D in.). Weight shall be 5.2kg (11.5lbs.).
Standard E.I.A. equipment rack mounting and a smoked acryl security
M-1212E Stereo Mixer
The mixer preamplifier shall operate as a stand alone device or
as an expansion mixer frame for the TOA M-1264 Stereo Mixer.
The mixer shall have twelve mono Mic/Line inputs; Stereo Out,
stereo Group, mono Cue and Auxiliary outputs. The mixer shall
have six mixing buses: L/R Stereo, L/R Group, Aux and Cue.
It
shall incorporate all solid state circuitry. Stereo, Group Aux and
Cue power outputs shall be nominal +4dB (maximum +20dB)
into a 1k ohm load, unbalanced at less than 0.15% THD Mic/Line
input at +4dB nominal output at 1kHz.
Nominal input sensitivity shall be: Mic/Line input 0.8mV/0.25V 1k/
50k ohm input impedance, electronically balanced. Gain shall be
mic 64dB, line 14dB to any output. Hum and noise shall be at
least 94dB below rated nominal output (all level controls
minimum) and 62dB below nominal rated output (one mono input
maximum), IHF-A. Frequency response shall be +0/-1.5dB (ref.
1kHz) from 20Hz to 20kHz at any power up to rated output.
Each Mic/Line input shall provide +24V phantom power with an
internal On/Off switch. Each shall also have a built in
compressor circuit that activates at 3dB below maximum level
with a “Soft Knee” threshold and approximately a 10:1 limiting
ratio. The circuit shall protect the mixer from being driven into
output clipping by excessive input levels. The Mic/Line input
unit shall accept optional input (LT-101 10k:10k ohms; LT-102
600:600 ohms) isolation transformers. The transformers shall
mount easily and securely inside the unit with the machine
screws provided. Electrical connection to the unit shall be easily
accomplished by means of flexible wires with locking connectors.
The front panel shall have: POWER On/Off switch and twelve
input level controls. Each input channel shall have L/C/R (Left/
Center/Right), GR/ST (Group/Stereo), AUX and CUE assign
switches. Each input shall have a combination channel On/Off
switch indicator that, when the channel is on, lights green or
lights red when the compressor circuit is activated. The channel
On/Off switches shall not affect the CUE signal. The front panel
shall also have a POWER On indicator.
The rear panel shall have the following: an input level select
switch for each Mic/Line input for MIC, LINE or MIC HPF;
12 XLR-F jacks for Mic/Line inputs; 1/4” TS jacks for Stereo,
Group Aux and Cue outputs. BUS LINK IN and OUT connectors
shall provide linking of all mixing buses plus the cue control bus
between additional TOA M-1212E’s or the TOA M-1264.
There shall be a fuse holder with a replaceable AC mains fuse.
AC line mains shall be 50/60Hz. Power consumption at rated
output shall be 26W (28W 220/240V). The mixer shall be
enclosed in a durable, painted, black, 1mm (.04 in.) steel
enclosure mechanically reinforced by a 2.0mm (0.08 in.) thick,
black anodized, aluminum front panel. Overall dimensions shall
be 482.6W x 88.4H x 311.8D mm (19.0W x 3.48H x 12.16D in.).
Weight shall be 5.2kg (11.5lbs.). Standard E.I.A. equipment
rack
mounting, a 1m Bus Link Cable and a smoked acryl security
cover shall be provided.
The mixer shall be the TOA model M-1212E.
NOTE. 0dB=0.775V RMS

BLOCK DIAGRAM & LEVEL DIAGRAM
DIMENSIONAL DIAGRAMS
M-l 264
REARVIEW
FRONTVIEWWITHOUT SECURITY
466 3’)
6 (19
FRONTVIEW WITHSECURITY COVER
SECURITY COVER/
SIDEVIEW

TOA Corporation
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