Audio Developments AD146-10PPM
10 Channel Battery Power Mixer with PPM Meters

The AD146's 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.

Limiting is indicated by a pair of LEDs and can be linked for stereo operation.

A pair of PPM meters 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 Tonader microphones.

The mixer receives its power from 10 x C cells fitted internally. Alternatively, power may be supplied from an external 12-15V source. Audio Developments.