Fairchild 670

2-Channel Vari-Mu Compressor

• Faithful reproduction
• Dual mono and stereo operation
• Six selectable time constants for attack and release: Position 1: 0.2 ms / 0.3 sec, Position 2: 0.2 ms / 0.8 sec, Position 3: 0.4 ms / 2 sec, Position 4: 0.4 ms / 5 sec, Position 5: 0.4 ms / 0.2 sec for single peaks, 10 sec for multiple peaks, Position 6: 0.2 ms / 0.3 sec for single peaks, 10 sec for multiple peaks, 25 sec for constantly high signal level
• Controls for threshold and input gain
• VU meter indicator
• Hand-wired point-to-point construction
• Specially designed transformers
• Built-in tubes: 8x 6386, 2x 12AX7, 4x 6973, 2x 12BH7, 1x E80F or (1x EF806), 1x 5651, 1x EL34, 1x GZ34
• Input and output impedance: 600 ohms
• Input level: 0 dBm to +16 dBm
• Output level: +4 or +8 dBVU (+27 dBm clipping point)
• Amplification: +7 dB
• Frequency response: 40 Hz – 15 kHz ±1 dB
• Noise level: –70 dB below +4 dBm
• Intermodulation distortion: <1%
• Compression ratio: adjustable from 1:2 to 1:30
• Dimensions (W × H × D): 482 × 359 × 229 mm
• Weight: 24.3 kg

Note: All tubes have been calibrated at the factory and must be installed correctly by the user before use. Detailed instructions are included with the device. In case of doubt, it is recommended that installation be carried out by a qualified professional.