- AD245 - the new PICO - retains all the
facilities, simplicity of operation and reliability of its predecessor
(AD145), and has been designed for discerning sound engineers requiring
Audio Developments' build and transparent sound quality.
- The ultra-low-noise microphone
amplifier developed for the AD140 series of mixers has now been hybridized
for use in AD245. Powering is provided for 48V Phantom and 12V Tonader
- Above all others, the most
appreciated feature of the original PICO was its simple but effective
equalizer. This has been retained in the AD245 - as it has throughout the
140 series of mixers.
- Inputs are protected against
radio-frequency interference, and transformer balanced. A high-pass filter
protects the transformer against low-frequency saturation. The main, stereo
output is transformer balanced and has separate left and right faders. A
transformer-balanced, mono mix down of the main output is also available. An
electronically-balanced, stereo tape-return appears on a pair of type-A
jacks. An input calibration potentiometer is adjacent to the jacks on the
- Limiters - which may be linked for
stereo operation - have been incorporated in the main output. Taking
advantage of the low noise-floor of modern digital recorders, the limiter
slope ratio is a gentle 7:1 ; thereby reducing distortion and making
artifacts normally associated with limiters much less noticeable or
objectionable. 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 outstation normally receives the mixer's mono output.
- All input and output connectors are
presented on one surface of the case and in line with their corresponding
modules. The connector panel is labeled in order that it may be read from
the front of the mixer. The integral carrying handle is also used to support
the mixer at a comfortable working angle.
- The mixer receives its power from 8
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' AD100-09 power supply unit is designed to drive
the mixer and, at the same time, charge a set of nickel cadmium batteries -
when fitted. The mixer is available in three frame sizes with 6 & 8 inputs.