The AP-1 is a Microphone/Instrument amplifier with an envelope follower & an opto compressor.
The preamp section with low noise /high speed gain booster for signals to an adequate level for the opto compressor.
Two audio inputs: balanced XLR socket for the mic input ; 1/4 '' input for instrument.
It is possible to power the mic input by the phantom voltage (48 Volts) for driving condenser microphones.
Mic amplifiers range from 1 to 71 dB (ideal for amplification of ribbon microphones and dynamic microphones signals).
Instrument amplifier with a 6 dB lower gain range than the microphone amplifier (ideal for amplification of signals from high impedance sources, such as guitar pick-ups, piezo-transducers and other weak to moderate level signal sources).
The Envelope Follower has three controllable (manually and by dedicated CV inputs) parameters: Attack Time, Release Time and selectable input high- and low pass filter.
The Opto Compressor enables gain reduction - controlled by an extracted DC signal from the Envelope Follower. The amount of compression determinates by the strenght of input signal, gradually from soft compression (soft knee) to limiting for high level input signals. The opto compressor is completed with 15dB make-up gain.
The Compressor's side-chain is coupled to the envelope followers input filter in purpose to make compression less sensitive to filtered signals by the envelope filter.
> tech specs
Preamp
Gain, selectable in 10 dB steps and variable in 10 dB range
Microphone 1 to 71 dB
Instrument -5 to 64 dB
PHASE inverts both inputs phase
Compressor
Input COMP IN, input for an additional
signal source.
Switches off the preamp signals
Output AUDIO, audio output for the module
ATTACK time variable and voltage controlled by CV
input from 500usec's to 250 msec's
RELEASE time variable and voltage controlled by CV
input from 20msec's to 5 sec's
MIX mixes uncompressed and compressed
signals (parallell compressio mode)
ENVELOPE FILTER, input filter for the compressor and
envelope follower
Envelope Follower
Modes high pass, 0.1, 0.3 and 1 kHz,
12 dB/octave
low pass, 3, 1 and 0.3 kHz
12 dB/octave
Outputs normal (positive going) and inverted
LED display indicates gain reduction
I/P CLIP indicates overload for the preamp
Current 40 to 60 mA
Dimensions 128.4mm (H), 91mm (B)
3 HE, 18TE
|
