Vizio D-5.5E User Manual

Operating Instruction Manual

ELECTRONIC MUSIC MIXER

Model D-5.5, D-5.5E

Toa Electric Co., Ltd.

KOBE, JAPAN

Contents

General Description ......................................... 2

Features .................................................. 3·4

Front Panel: Names of components & their usage (D-5.5) ....... 5~9

Rear Panel: Names of components & their usage (D-5.5) ..... 10~12

Front Panel: Names of components & their usage (D-5.5E) ...... 13

Rear Panel: Names of components & their usage (D-5.5E) ....... 14

Block and Level Diagrams

Specifications (D-5.5, D-5.5E) ............................... 17

Rack Mounting Instructions ................................. 18

Procedure for changing internal switch setting ................ 19

Characteristics Diagam ..................................... 20

Appearance ............................................... 20

Precautions

1. Power Supply
The D-5.5 and the D-5.5E are designed to operate on local AC (50/60Hz) Mains,

±10%.

2. 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).

................................. 15·16

3. Phantom Power Supply

The phantom power switch on each input channel permits the user to supply 48V
DC through the input connectors to a condenser microphone. If phantom power is
not required, the switch must be in the "off" position.

4. Description of components and function on the D-5.5, D-5.5E
Various descriptions are applied, depending on each manufacture. In our
Operating and Instruction Manual explanation of components and functions is
made according to our usage for them.

— 1 —

General Description

The TOA D-5.5 is a 19" rackmount or console configuration, eight-input stereo mixer especially designed
for electronic music and sound. It is expandable to a 32-input mixing system, with group, stereo and

mono outputs, and 16 MIDI-THRU jacks, when combined with two D-5.5E 12-input expansion units.
The D-5.5 was designed to perform many different applications in broadcast, live sound reinforcement,

and recording environments.

The D-5.5 provides four Group outputs, and mixing busses for Aux 1, Aux 2, Effects, Reverb, and Cue.

System features include: Sum output selectable pre- or post-fader (St. L + R); two Aux sends, selectable

pre-EQ/fader, post-EQ/pre-fader, or post-EQ/fader; Aux returns to Groups 1~4 and Stereo L, R, with pan,
level and crossfade controls; an effects patching loop and an internal spring reverb effect are returnable

to the 4 groups, stereo L, R, and Aux 1 & 2, with pan, level, and crossfade controls; dual bargraph meters,

selectable to Sum/Cue or Stereo L/R; a Headphone output with level control, a Cue buss output with

level control, and a Cue buss input.

Each input channel features a writing block to identify the source; tape/source selection switch; cue

switch; 60 mm fader; pad and trim controls; two-color LED to indicate signal prescence (green), or
clipping (red); channel on/off switch with orange LED indicator; 3-band EQ (high and low shelving-type,

and mid peaking-type with frequency sweep control); two Aux sends, selectable pre- or post-EQ; reverb
send to internal spring reverb; effects send; and four group sends via two pan and level controls.

Each of the four Groups features level and crossfade controls for returning Aux and Effects signals to the

Group mixing busses, and a stereo pan for assigning Group signals to the stereo Left and Right mixing

busses. The four groups and Stereo L, R also feature dual-color signal prescence/clip LED indicators; an

on/off switch with orange LED; writing block; 60 mm fader; and cue switch.

The D-5.5 rear panel features an RCA tape input, a 1/4" phone jack, and an electronically balanced XLR

(with switchable 48-volt phantom powering) for each input channel. Each input also has separate pre

and post accessory patch points and a direct output. Input channels 7 and 8 are front panel switchable to
stereo RIAA inputs, for use with magnetic cartridge turntable.

Group 1~4 output connections are RCA and 1/4" phone jacks; each features separate pre and post

accessory patch points (RCA). Stereo L, R and Sum output connections are individual RCA's, 1/4" phone

jacks, and electronically balanced XLR's with ground lift switches. Stereo L, R and Sum outputs also
feature pre and post accessory patching jacks.

The MIDI jacks are also located on the rear panel. "A" or "B" MIDI inputs are assignable to four

MIDI-THRU outputs (expandable to 16), allowing the use of multiple MIDI instruments without the data

loss or delay that may occur when several instruments are connected serially through their internal

MIDI-THRU jacks. Each MIDI-THRU output is provided with a front panel mounted on/off switch.

Also on the rear panel are a Buss-Link connector for connecting D-5.5 Expander units, separate 1/4"

phone jacks for stereo L, R Cue buss input and outputs, Aux 1, 2 sends and returns, external Reverb send

and return, and Effects send and return; a push button circuit breaker, chassis ground post, and six-foot

AC power cord complete the rear panel.

The D-5.5 combines with one D-5.5E for 20-inputs or two D-5.5E's for 32 input channels. Both units can
be mounted in a standard 19" rack, or may be used in a console configuration by removing the rack ears,

rotating the rear panel 90 degrees, and attaching the included wooden side panels. The mixers are

finished in an attractive and durable gray enamel, with 3-color control identification markings.

— 2 —

Features

The D-5.5 is an 8 input, 19" rack mountable mixing console, featuring superior

audio performance, system expandability, and unique "user friendly" design.

System Features:

8×4×2×1 configuration: 8 inputs; 4 sub groups;
stereo L & R; mono sum.

Expandable to 32 inputs with two 12 input D-5.5E

expansion unit.

Rear panel rotates 90 degrees to enable use as console

type mixer, or as 19" rack mount mixer with the

included mounting brackets; removable wooden side

panels.

Selectable 2× 4 MIDI Thru function; expandable to
2×16.

Stereo RIAA Inputs for turntables with magnetic

cartridge; selectable from front panel; input channels

7 & 8.

2 Aux returns to four groups and Stereo L & R, with
level and crossfade controls.

Internal spring reverb with dedicated 2-band EQ. Can

return to four groups, stereo L & R, and Aux 1, 2 with

pan, level, and crossfade controls.

Effects patching loop, returnable to four groups,

stereo L & R, and Aux 1, 2 with pan, level, and

crossfade controls.

Each Input Channel Feature:

Tape/Source Selection switch.

2-color LED indicator for signal presence (green) and

clip (red).

Pad and trim controls.

3-band EQ; shelving type for high and low; peaking
mid with sweep control.

2 Aux sends; selectable pre or post.

Reverb send to internal spring reverb; post EQ and

fader.

Effect send; post EQ and fader.

4 group sends via 2 level and pan controls.

Channel on/off switch with LED indicator (orange).

Writing block.

60 mm fader.

Cue switch.

Each Group Features:

Dual bargraph meters; selectable between Sum/Cue

and St L & R.

Sum Output (St L & R); selectable pre or post fader.

2 Aux sends; selectable "pre-EQ and fader," "post­EQ, pre-fader," "post-EQ and fader."

Mono reverb send and mono effects send; both are

"post EQ and fader."

Headphones output with level control.

Push button circuit breaker instead of fuse.

Level and crossfade controls for returning aux and

effects signals to group busses.

Stereo pan pot to Stereo L & R busses.

2-color LED indicator for signal presence (green) and

clip (red).

Channel on/off switch with LED indicator (orange).

Writing block.

60 mm fader.

Cue switch.

— 3 —

Features

Stereo L & R Features:

2-color LED indicator for signal presence

(green) and clip (red).

Channel on/off switch with LED indicator
(orange).

Writing block.

60 mm fader.

Cue switch.

REAR PANEL:

Input Channel Connections:

Separate pre and post accessory patch points: RCA.

Direct Output: RCA.

Source inputs: 1/4" phone jack, and electronically
balanced XLR with individually switchable 48-volt

phantom power.

Tape input: RCA.

Sum Connections:

Separate pre and post accessory patch points: RCA.

Direct Output: RCA. 1/4" phone jack, and electroni-

cally balanced XLR with ground lift switch.

Other Connections:

L & R Cue input: 1/4" phone jacks.

L & R Cue Buss output: 1/4" phone jacks.

Aux 1 & 2 sends and Aux 1 & 2 returns: 1/4" phone
jacks.

Rev send, and return: 1/4" phone jacks.

Effects send, and return: 1/4" phone jacks.

A and B MIDI Input: DIN plug.

1-4 MIDI Thru: DIN plug.

Buss Link: Multi-pin computer-type connector.

RIAA inputs on channels 7 & 8: RCA.

Group 1-4 Connections:

Separate pre and post accessory patch points:

RCA.

Direct Output: RCA, 1/4" phone jack.

Stereo L & R Connections:

Separate pre and post accessory patch points: RCA.

Direct Output: RCA, 1/4" phone jack, and electroni-

cally balanced XLR with ground lift switch.

— 4 —

Front Panel (D-5.5)

INPUT CHANNEL

(D-5.5)

Phono EQ (RIAA) IN/OUT Switch (RIAA IN/OUT)

This switch is available for input channels 7 and 8 only and is active when a

turntable with magnetic type cartrige is connected to the Phono input channel.
The switch is a "push-in push-out" type. The "out" position provides a flat

frequency response.

Tape/Source Switch (TAPE/SOURCE)

This switch is provided for selecting the desired input signals. When monitoring

the signals from the XLR connector, phone jack and phono inputs, the switch

should be set to the "SOURCE" position. When the signal from the "Tape In"

input is desired, the switch should be set to the "TAPE" position.

Signal/Peak LED Indicator (SIG/PEAK)

The dual color LED indicator lights green when the pre or post EQ signal level
reaches more than -30dB, and turns red when the signal level reaches 3dB
below clipping, giving a visual reference for optimum setting of the trim control.

Input Level Selector (PAD)

The selector provides 30dB attenuation of the sensitivity of the XLR connector,

phone jack and phono inputs at the "30" position. The "0" position shows the

sensitivity indicated on the panel. The correct setting should be made according

to the output level of the equipment connected.

Input Trim Control (TRIM)

The trim control adjusts the gain of the preamp stage of the associated channel,

providing 30dB of gain control. When the trim control is set to the "0" position

with the input level selector at the "0" position, the nominal levels of the
associated inputs are as follows.

a. Mic input: -60dB

b. Tape input: -20dB

c. Phono input: -50dB (Input channels, 7 and 8 only)

The trim control and input level selector of each channel should be properly

adjusted so that the peak LED just begins to turn red from green or only flash red

occasionally. This will ensure lowest distortion level and optimum signal to

noise ratio.

High Equalizer Control (HIGH)

The high EQ control alters the high frequency response of the input channel,
providing ±10dB at 4kHz, and ±15dB at 20kHz of continuously variable active
shelving equalization. The "0" detented position provides flat audio response.

Mid Equalizer Center Frequency Control (MID FREQ)

This control alters the center frequency of the mid EQ control in the range from

200Hz to 5kHz.

Mid Equalizer Control (MID LEVEL)

This control alters the mid frequency response of the input channel, providing
±15dB at the center frequency of peaking equalization. The "0" detented

position provides flat audio response.

Low Equalizer Control (LOW)

The low EQ control provides ±10dB at 150Hz and ±15dB at 20Hz of

continuously variable active shelving equalization. The "0" detented position

provides flat audio response.

AUX 1 Control (AUX 1)

This control determines the level of the input signal to be fed to the aux 1 buss.

When in the center detent position the control is off, and no signal is assigned.

Rotating the control counter-clockwise increases the amount of pre-fader/post-

EQ signal assigned to the buss. Rotating the control clockwise increases the

amount of post-fader/post -EQ signal.

Note: "Pre-fader/post-EQ" can be changed to the pre-EQ signal with an internal

switch. (See page 19 for details.)

— 5 —