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*Please note -- This pre-owned item may show signs of use. Please see the photos for details.
The Q2 Audio F765 is the compression and limiting sections of the famous "Compex Limiter"™ built into a single 500 Series slot. The audio path contains the same blue Phillips type capacitors and BC series transistors as the original Compex.
Formatted after the vertical "N-Unit" with slight layout changes for enhanced usability, the F765 lives up to the reputation it's big brother, the F760X-RS, has made over decades of being a "secret weapon" on countless records.
| Product Name | Q2 Audio Compex F765 500 Series Compressor / Limiter Module |
|---|---|
| Brand | Q2 Audio |
| Condition | Pre-owned |
| MPN | F765 |
What's in the Box?
-
Q2 Audio Compex F765 500 Series Compressor / Limiter Module
- Single channel level control offering simultaneous compression gain reduction with peak limiting
- Precision calibrated compressor/limiter threshold control which allows the user to “dial up” the amount of compression required before peak limiting occurs
- Switched Compression values from 1:1 (amplifier), 2:1, 3:1, 5:1, 10:1 & 20:1 (limiter)
- Auto dual platform release function – allows fast transient recovery on a “build-up” slow release
| Input | 10K ohms Unbalanced |
| Output | Transformer Balanced (Cinemag CMOB-3L) Max output: 20dBu, 18.5dBm |
| Metering | Sifam Fast Responding analog meter |
| Stereo Linking | Must order as stereo pair |
| Power Requirements | +/-16V DC @ 70mA per rail (brief 400mA turn-on surge) |
| System Gain | 34dB with input/output attenuators fully open. Unity gain in Bypass mode |
| Thresholds | Peak Limiter: +14dBu maximum with unattenuated output. Referred to unattenuated input level 20dBu Compressor: Calibrated with reference to Peak Limiter thresholds and marked 0 – 20dB in 2dB steps. (Reference to unattenuated input level this is -20dBu to -40dBu) |
| Release | Peak Limiter: 250mS Compressor: 25mS, 50mS, 100mS, 200mS, 400mS, 800mS, 1.6 secs, 3.2 secs + Auto release function |
| Attack | Peak Limiter: < 250uS for 100% control of overshoot – without any over limiting. (measured at 1KHz for 10dB gain reduction) Compressor: 250uS, 2.5mS, 25mS |
| Distortion | Measured at 1KHz for 10dB compression & 3.2 secs release time. Compressor: at +10dBu threshold <0.1% (typically 0.04%) Peak Limiter: at +14dBu threshold <0.3% |
| Frequency Response | Balanced: < -0.5dB at 20Hz & < -0.75dB at 20KHz |
| Signal – Noise Ratio | Referred to Peak Limiter threshold level as set by output attenuator: better than -80dB (Measured with low pass filter -3dB at 25KHz) |
| Stereo Matching | Control volts matching on compressor to within ±1dB of each other, consequently no image shift during operation |
| Selectable Peak Limiter Operation | Peak Limiter on – off or Pre-emph (50uS time constant) |
| Indicators | Overall Gain Reduction Meter scaled 0 – 20dB in 4dB divisions. White scale on black background with yellow pointer Peak Limiter operating: Red indicator |
Q2 Audio Compex F765 500 Series Compressor / Limiter Module
*Please note -- This pre-owned item may show signs of use. Please see the photos for details.
The Q2 Audio F765 is the compression and limiting sections of the famous "Compex Limiter"™ built into a single 500 Series slot. The audio path contains the same blue Phillips type capacitors and BC series transistors as the original Compex.
Formatted after the vertical "N-Unit" with slight layout changes for enhanced usability, the F765 lives up to the reputation it's big brother, the F760X-RS, has made over decades of being a "secret weapon" on countless records.
| Product Name | Q2 Audio Compex F765 500 Series Compressor / Limiter Module |
|---|---|
| Brand | Q2 Audio |
| Condition | Pre-owned |
| MPN | F765 |
What's in the Box?
-
Q2 Audio Compex F765 500 Series Compressor / Limiter Module
- Single channel level control offering simultaneous compression gain reduction with peak limiting
- Precision calibrated compressor/limiter threshold control which allows the user to “dial up” the amount of compression required before peak limiting occurs
- Switched Compression values from 1:1 (amplifier), 2:1, 3:1, 5:1, 10:1 & 20:1 (limiter)
- Auto dual platform release function – allows fast transient recovery on a “build-up” slow release
| Input | 10K ohms Unbalanced |
| Output | Transformer Balanced (Cinemag CMOB-3L) Max output: 20dBu, 18.5dBm |
| Metering | Sifam Fast Responding analog meter |
| Stereo Linking | Must order as stereo pair |
| Power Requirements | +/-16V DC @ 70mA per rail (brief 400mA turn-on surge) |
| System Gain | 34dB with input/output attenuators fully open. Unity gain in Bypass mode |
| Thresholds | Peak Limiter: +14dBu maximum with unattenuated output. Referred to unattenuated input level 20dBu Compressor: Calibrated with reference to Peak Limiter thresholds and marked 0 – 20dB in 2dB steps. (Reference to unattenuated input level this is -20dBu to -40dBu) |
| Release | Peak Limiter: 250mS Compressor: 25mS, 50mS, 100mS, 200mS, 400mS, 800mS, 1.6 secs, 3.2 secs + Auto release function |
| Attack | Peak Limiter: < 250uS for 100% control of overshoot – without any over limiting. (measured at 1KHz for 10dB gain reduction) Compressor: 250uS, 2.5mS, 25mS |
| Distortion | Measured at 1KHz for 10dB compression & 3.2 secs release time. Compressor: at +10dBu threshold <0.1% (typically 0.04%) Peak Limiter: at +14dBu threshold <0.3% |
| Frequency Response | Balanced: < -0.5dB at 20Hz & < -0.75dB at 20KHz |
| Signal – Noise Ratio | Referred to Peak Limiter threshold level as set by output attenuator: better than -80dB (Measured with low pass filter -3dB at 25KHz) |
| Stereo Matching | Control volts matching on compressor to within ±1dB of each other, consequently no image shift during operation |
| Selectable Peak Limiter Operation | Peak Limiter on – off or Pre-emph (50uS time constant) |
| Indicators | Overall Gain Reduction Meter scaled 0 – 20dB in 4dB divisions. White scale on black background with yellow pointer Peak Limiter operating: Red indicator |
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