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D-4E

Toa D-4E, D-4 Operating Instructions Manual

Operating Instruction Manual
ELECTRONIC MUSIC MIXER
Model D-4, D-4E
D-4
D-4E
Toa Electric Co., Ltd.
KOBE JAPAN
Contents
Features .................................................................................... 3
Front Panel: Names of components & their usage [D-4] ...................... 4
Front Panel [D-4E] ....................................................................... 6
Rear Panel [D-4E] ........................................................................ 6
Block and Level Diagrams ............................................................ 7
Specifications [D-4, D-4E] ............................................................. 8
Procedure for Changing internal Switch Settings .............................. 9
Characteristics Diagrams .............................................................. 10
Appearance ................................................................................ 10
Precautions
1. XLR Type Audio Connector
The connectors are wired as follows. The pin 1 is ground (shield), the pin 2 cold (low, minus), the pin 3 hot (high, plus).
2. Description of components and functions on the D-4, D-4E
Various descriptions are applied, depending on each manufacturer. In our Operating and Instruction Manual explanation of components and functions is made according to our usage for them.
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General Description
The TOA D-4 is a 19" rack mountable, four input stereo mixer especially designed for
electronic music. When combined with the D-4E, the matching six input expander,
the D-4 becomes a ten input mixer with five balanced XLR inputs, stereo and mono outputs, and eight MIDI Thru jacks. The D-4 is ideal for live use, home recording, or broadcast work.
Each of the D-4's inputs features a writing block for identifying the input source, a trim control with a range of 34dB, an LED clip indicator, an Aux (auxiliary) send (internally switchable from post-EQ to pre-EQ, and selectable on the front panel between
pre-fader and post-fader), an Effects send (post-fader/post-EQ), concentric bass and
treble controls, and concentric stereo pan and volume controls. The D-4's output
section features master level controls for both Effects and Aux sends, master level
controls to return Effect and Aux to mono sum and to stereo L&R with pan, master volume controls for stereo L&R and mono sum, a switch to derive the mono sum from either pre-fader or post-fader stereo busses, and LED clip indicators for L, R, and Sum outputs. The head phone output jack is also located on the front panel, along with the
head phone volume control and cue select switch.
The rear panel of the D-4 features RCA and 1/4" phone input jacks, accessory patch
points (switchable internally from post-fader/post-EQ to pre-fader/pre-EQ), and direct outputs for each input channel. In addition, input channel 4 is equipped with a
balanced XLR input and switchable 48 volt phantom power. The stereo L&R outputs are 1/4" phone jacks and RCA jacks, while the mono sum out features an XLR
electronically balanced output with ground lift switch, and a 1/4" phone jack. Stereo
L&R and Sum outputs all feature accessory patching, and there is a separate 1/4" phone
input direct to the mono sum buss.
The D-4's MIDI jacks are also located on the back panel. One MIDI input jack is split
into four MIDI Thru jacks, allowing the use of multiple synthesizers without the
problems of data corruption and delay that occur when connecting many synths in
series through their internal MIDI Thru jacks.
A pushbutton circuit breaker and chassis ground post is located on the back of the D-4, as is a 6-foot AC power cord.
The D-4E is a six input expander designed to be used exclusively with the D-4. Each
input channel has the same controls and jacks as the D-4, but the D-4E has four balanced XLR inputs, each with its own 48 volt phantom power when combined with
the D-4 give a total of eight MIDI Thru jacks. The D-4E features a buss link jack located
on the back panel to connect it to the D-4, with the included 2-foot buss-connect cord
(a 6-foot connecting cord is optional — see your authorized TOA dealer). There is also a
switched accessory outlet on the back of the D-4, allowing both units to power up with
the same on/off switch.
Both the D-4 and D-4E can be mounted in a standard 19" rack, and each occupies two
rack spaces. Removable rack ears are included. The mixers are finished in an attractive gray enamel finish.
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Features
1. Four input channels, total ten input channels when combined with D-4E
2. MIDI Thru circuitry with one MIDI In jack and four MIDI Thru jacks (total eight
3. Stereo Left and Right outputs with both RCA and 1/4" jacks
4. Five busses (Stereo L, R, Eff, Aux, and Sum) for maximum flexibility
5. Independent Eff and Aux return to Stereo L&R and to Sum
6. Individual accessory patch points for Stereo L&R and Sum for best signal-to-noise
7. Sum output features electronically balanced XLR connector and unbalanced 1/4"
8. Head phone monitoring for Stereo L&R, Sum, Eff, and Aux
9. Pushbutton circuit breaker for protection
10. 19" rack mounting bracket included is removable for use outside of rack
MIDI Thru jacks when combined with D-4E) for convenience and protection against data loss or delay
ratio
phone jack
Each Channel
1. Input trim control with LED clip indicator for best signal-to noise ratio
2. Two band EQ
3. Accessory patch point is factory preset to be post-fader/post-EQ, internally
switchable to pre-fader/pre-EQ
4. Aux send is factory preset to be post-EQ, internally switchable to pre-EQ
5. Aux level control on the front panel derives signal from either pre-fader or
post-fader with center detent position being "off"
6. Independent effect send is post-fader/post-EQ
7. Direct output on each channel, ideal for recording
8. Concentric stereo pan and channel volume control
9. Input Channel 4 on D-4 has electronically balanced XLR input connector with
switchable 48 volt phantom power, as do Channels 5, 6, 7, and 8 on D-4E
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