FET Compressor in 500 Series Module Format Attack adjustable from 15 microseconds to 15 milliseconds 7 adjustable release modes (0.05 to 2.0 seconds) Ceiling control simultaneously controls threshold and make-up gain Analogue gain reduction VU meter in 1970s retro style 2520 and 2510 operational amplifiers Aiscrete audio path circuitry Proprietary API output transformer Hardware bypass Balanced input and output Format: 500-series module

Mic Preamp- The 500 series- 65 dB gain- Microphone input on the front and back- Line / instrument input jack- 20 dB pad-switch- 48V phantom and phase switchable- LED-VU meter- Lownoise preamp (-129dB)- Circuit design with the API2510 and 2520 operational amplifiers- Requires API Lunchbox 500-6B or 500VPR 10Slot rack

Analogue Summing Mixer 16 channels API 2510 Input operational amplifier API 2520 OpAmps Insert send/return on each channel 2 stereo programme buses: Mix-A and Mix-B Each channel can be assigned to Mix-A and Mix-B Continuously variable panning with centre detent 31-step, rasterised volume control 4-segment LED level meter Analogue VU meter Format: 19" / 2 U Connections: 2 line inputs: Sub-D25 (channel 1-8 and channel 9-16) 2 Insert Send: Sub-D25 2 Insert Return: Sub-D25 2 line inputs: XLR 2 line outputs Mix-A: XLR with insert Send / Return: 6.3 mm jack 2 line outputs Mix-B: XLR with insert Send / Return: 6.3 mm jack

Microphone / Instrument / Line Preamp- Microphone preamp with 65 dB gain- Line and instrument pre-amplification with 45 dB gain- Button for 3: 1 output transformer- LED VU meter- 20 dB Pad switch- Output volume control- + 48V phantom power switchable- Combo input XLR / 6.3 mm jack on the front- Circuit design with API 2520 operational amplifiers- Type: 500 Module

Uses the discrete operational amplifiers 2510 and 2520- Controllable Threshold, Attack, Release, Ratio and Output- 10 segement VU-Gain-Reductionpeak Meter- LinkSwitch- Switchable feed-forward or feedback compression- THRUST switch for frequency dependent Sideschain- Trafosym. exit- Hardware bypass- Requires API Lunchbox 500-6B or 500VPR 10 Slot Rack