The AD146 inputs, main and auxiliary outputs are transformer balanced on XLRs.

Separate connectors are used for microphone and line-level inputs: such is the isolation, both input signals may remain connected at all times.

High-pass filter protects the transformer against low-frequency saturation.

Headphones and two pairs of stereo auxiliary returns left and right appear on standard jacks.

A 6-pin XLR carries two-way conversation between the mixer and an Outstation - boom operator, director etc.

The AD146 has four mixing busses that enable mixing and/or recording to be performed in the L-R and M-S domains simultaneously. Matrix amplifiers may be switched into the main A-B and C-D outputs.

The AD146 incorporates the M-S facilities that are now much appreciated by Audio Developments' customers. Many recordists are aware of the advantages Blumlein's M-S microphone techniques have over all other microphone techniques - even when recording in the L-R domain.

Limiters - which may be linked for stereo operation Limiting is indicated by a pair of LEDs.

A pair of meters - either PPMs or VUs - may be switched to monitor either the main output or the monitor/PFL output, and battery voltage. The meters can be illuminated.

The frequency of the internal oscillator is selectable between 1kHz and 10kHz, its output replacing the signal on the main output (TONE).

The headphone monitor may be switched between main output and tape-return - both with PFL override. The left, right and left + right signal paths may be routed to both contacts of the monitor-output jack.

Via an internal microphone the operator is able to communicate with the main output (SLATE) and with an outstation (EXT) - from which talkback is available, under logic control.

The AD146 presents all its input and output connectors on one surface of the case and in-line with the corresponding module. The connector panel is labeled in order that it may be read from the front of the mixer. The integral carrying handle may also be used to support the mixer at a comfortable working angle.

Powering is provided for 48V Phantom and 12V Tonadermicrophones.

The mixer receives its power from 10 x C cells fitted internally - the battery housing adding great strength to the casework. Alternatively, power may be supplied from an external 12-15V source. Audio Developments'

The mixer is available in four frame sizes with 6, 8, 10, 18 or 24 inputs.

REFERENCE 0dB = 775mV at 1kHz unless otherwise stated

MAX GAIN MIC 85 75 65 55 45 35 dB

LINE 50 40 30 20 10 0 dB

MAX INPUT LEVEL MIC -42 -32 -22 -12 -2 +8 dB

LINE -7 +3 +13 +23 +33 +43 dB

RETURNS +24 dB

INPUT MIC >1k5R

IMPEDANCE LINE >10kR

RETURNS >100kR

MIC POWERING +48V DC and +12V DC PHANTOM POWER

+12V TONADER (to order)

MAX OUTPUT +23.5dBm (600R LOAD) - A,B,C,D;

TRANSFORMER BALANCED

CHANNEL OUT; MON 1 L&R; XLR

MON 2; UNBALANCED STEREO JACK+18dBm

(600R LOAD)

OUTPUT <60R A,B,C,D;

IMPEDANCE <20R CHANNEL OUT ; MON 1;MON 2

FREQUENCY +0; -1dB 20Hz to 20kHz MAIN SIGNAL PATHS

RESPONSE +0; -1.5dB 20Hz to 20kHz MONITOR SIGNAL PATHS

EQUALISATION LF; SHELVING ±10dB @ 100Hz VARIABLE TURNOVER MAX ±15dB @ 30 Hz

MF; PEAK/DIP ±15dB @ 2k8Hz Q = 1.2 RECIPROCAL

HF; SHELVING ±10dB @ 10kHz VARIABLE SLOPE MAX ±15dB @ 30kHz

HIGH-PASS FILTER -3dB @ 90Hz and 150Hz, 12dB/OCTAVE SLOPE

HARMONIC <0.03% @ 1kHz 0dBm OUTPUT

DISTORTION <0.15% @ 40Hz to 20kHz +15dBm OUTPUT

CROSSTALK <-70dB 40Hz to15kHz INTERCHANNEL & INTERGROUP

<-55dB 40Hz to15kHz BETWEEN L&R ON STEREO CHANNEL

NOISE MIC <-126dB 20Hz to 20kHz 200R SOURCE

(WITH RESPECT TO THE INPUT)

LINE >70dB SIGNAL-TO-NOISE RATIO 20Hz to 20kHz

LIMITER THRESHOLD +8dB

RATIO 7 : 1

ATTACK 2ms (SET AT FACTORY)

(VARIABLE VIA INTERNAL PRESET)

RELEASE 250ms (SET AT FACTORY)

(VARIABLE VIA INTERNAL PRESET)

POWERING EXTERNAL AD100-015 POWER SUPPLY UNIT

+14V DC, 4-PIN XLR

3W (WITHOUT MICROPHONE POWERING)

Channel direct outputs

This option converts the standard line input XLR connector to a male output XLR connector giving an internally selectable pre or post fader direct output.

Fader starts

Micro switches added to the input channel faders are wired direct to the 15 pin D socket

Variable input gain

A continuously variable gain control replaces the six position rotary gain switch

12 Volt Tonader Mic Power

Replaces the 12 Volt phantom with 12 Volt Tonader Mic power

click here for System pdf

click here for Mic Line pdf

click here for Line pdf

click here for Stereo Line pdf

click here for Output pdf

click here for Monitor pdf