IGS Audio A-Type 525
UPC/EAN #5904492024078
MPN #525 A-Type
Compact 500-series compressor/limiter with discrete components. Ultra-fast attack, multiple release settings and de-esser mode. Ideal for vocals, guitars, and percussions
The IGS A-Type 500 compressor/limiter is inspired by a legendary American design from the 1970s. The circuit is built entirely with discrete components in a through-hole assembly. The compressor input is balanced by the SSM2141 op-amp, while the output is transformer-balanced. An additional, second audio transformer is responsible for the feedback signal, which, after adjusting the time constants, returns to the compression control element, the VCR (Voltage Controlled Resistor). The control signal has a negative value relative to the circuit ground, and its value directly affects the VCR resistance, which in turn adjusts the gain of the first amplification stage.
Specifications
INPUT & OUTPUT
Audio transformers: Yes, IGS custom transformers
Input Impedance (balanced): 10k, SSM2141
Output Impedance (balanced): 75 Ohm, IGS custom transformer
LEVELS
Operating Level: +4 dBu
Max input level: +27 dBu
Max output level: +28 dBu
Max Gain Reduction: -25 dB
Max. gain: 25 dB
Noise Level: -99 dBA
TIME CONSTANTS
Attack: 15us
Release: 100ms - 2s
Ratio: 2:1, 20:1
BANDWIDTH
Frequency response: 8 Hz to 20 kHz, +/- 0.1dB
DISTORTION (@ 20 HZ - 20 KHZ)
THD+N: 0.014%
POWER
Power consumption: Power consumption: 2.5W
PACKING BOX
Shipping weight: 1kg
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