API Audio

• Classic 550B Design
• Switchable level range for finer resolution of complex sound sources or mastering
• Output stage implemented with transmitter (+30 dBm)
• High and low peak/shelf filters
• Balanced inputs and outputs (XLR)
• Additional unbalanced input TRS each channel
• Internal power adapter
• With hardwire bypass

• Exact reissue of the original API 525 compressor from the 70s
• Peak detecting feedback compressor / limiter, adjustable threshold and output level
• Analog VU meter for gain reduction
• 4 release times
• De-esser function
• Traditional API fullly discrete circuit design
• Balanced inputs / outputs
• Hardware bypass
• Requires the API lunchbox 500-6B or 500VPR 10 slot rack

• API 2520 op-amp
• Adjustable threshold -20db to + 10db
• Selectable ratio, attack and release times
• Patented highpass filter in the detector path
• With variable link between left and right channel
• Selectable "old" and "new" envelope curve
• Typical behaviour as with API525, 1176 and Fairchild
• Auto or manual "Gain make up"
• Sidechain inputs
• Ideal sum compressor

• 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

• Classic API circuit design
• API 2520 output amplifier
• AP2516 input amplifier
• Fixed frequency HP filter
• Max. 68dB of gain
• Phantom power: +48V
• -20 dB Pad and polarity switch
• VU meter
• Peak LED
• Switch for 3:1 output amplifier tap selection
• Variable output control
• 2 Mic/Line Hi-Z combo inputs: XLR/jack 6.3 mm
• 2 Mic inputs: XLR
• 2 Line outputs: XLR
• Design: 19" / 1U
• Dimensions (W x H x D): approx. 48.26 x 4.44 x 27.94 cm
• Weight: approx. 4.08 kg

• Classic API circuit design
• API 2520 OP amplifier
• Switchable per channel: 3:1 output transformer selection, +48V phantom power, -20 dB pad, polarity
• LED meter and adjustable gain and output volume per each channel
• Stereo panner with a level control
• Aux send (post fader)
• 4 Inputs: XLR
• 4 Hi-Z inputs: 6.3 mm jack
• 4 Outputs: XLR
• Construction: 19" / 1U

• 10 Module slots for standard module 500 from different vendors
• Inputs and outputs via XLR
• Incl. external power supply L200PS

• Low-pass filter: 500 to 20,000 Hz (-6 or -12 dB slope)
• High-pass filter: 20 to 400 Hz (-12 or -18 dB slope)
• Variable notch filter: 20 to 20,000 Hz
• Type: 500 Module

• Design: 500 module
• 12 dB boost/but per band
• Midpoint filter frequencies: 31 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16 kHz
• Bypass switch
• Based on the original 1969 API 560 EQ

• Front-side Hi-Z input 6.3 mm jack
• Thru output: 6.3 mm Jack
• Gain control with 55 dB gain
• Tone control
• "Bright" switch
• LED VU meter
• 20 dB pad
• Type: 500 Module

• Classic API circuit design
• API 2520 OP amplifier
• Switchable 3:1 Output transformer for each channel
• Switchable 48 V Phantom Power, -20 dB pad and polarity for each channel
• LED Meter as well as adjustable gain and output volume for each channel
• 4 XLR Inputs
• 4 Hi-Z Inputs: 6.3 mm Jack
• 4 XLR Outputs
• Design: 19" / 1 U

• For 500 10slot, 6slot API Lunchbox and 1608

API Audio Select SV14 4-Band EQ; 4-band equalizer in 500 rack format; based on the classic APSI 562 EQ; stepless control of frequency and gain; 12 dB boost/cut per band; bands are parametrically configured with peak/dipping; balanced output with special transformer; high headroom +24 dB clip level; fits API's 500 VPR Rack or Lunchbox

API Audio Select SV12 Compressor; Compressor in 500er rack fromat; Original analog compressor circuitry for the ATI Paragon console; Variable threshold, ratio and make-up gain controls; LED display; Switchable hard or soft knee compression; Hardware bypass; Linkable for stereo operation with true RMS power summation

API Audio MC531 Monitor Controller; active monitor controller for connection of up to 3 monitor pairs; integrated talkback microphone; mute, mono and DIM function for all stereo outputs; 18 segment LED meter; Bluetooth connectivity; API 2510 operational amplifier for buffering all inputs; connections: 3x stereo line input (6x jack 6.3 mm balanced), 2x line input 3.5 mm mini-jack stereo (front and rear panel), digital input switchable between AES3 XLR and USB, 3x stereo line output (6x XLR balanced), 1x line output XLR mono for subwoofer, 2x stereo headphone output 6.3 mm jack, balanced level meter output for connection to an external meter system; incl. external power supply; dimensions; 27.94 x 32.39 x 10.16 cm (WxDxH); weight: approx. 3.86 kg

• 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

API TranZformer LLX Bass Pedal; Proprietary API 2510 OpAmp; Signature API output transformer; 3-band EQ each with +/-15 dB of gain; OpAmp overdrive circuit; 40 dB of gain; -20 dB output pad; bypass switch; connections: 1x Hi-Z input 6.3 mm jack, 1x Hi-Z output 6.3 mm jack; power supply via external power supply 9 -18V DC / 100mA, 2.1 x 5.5 mm (not included); Dimensions: approx. 11.68 x 9.65 x 7.6 cm; weight: 0.79 kg

• 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

• Max. 69 dB gain
• Totally discrete circuit design with 2520 op-amp
• Proprietary AP2516 input transformer
• 20 dB Pad switch
• Switchable 48 V phantom power
• VU Meter
• Peak LED
• Design: 500 Series module

• Discrete 3 band EQ from the 500 Series
• 7 centre frequencies selectable per band
• 12 dB of boost / cut per band
• EQ band 1 and 3 in selectable shelf / peak characteristics
• Traditional API circuit design
• Headroom up to 30+ dB
• In / Out switch
• Requires API Lunchbox 500-6B or 500VPR 10Slot Rack