Crane Song SYREN - Manual (Page 5)

SPECIFICATIONS
Pad: 0, -15, -25 db steps
Max Gain: 65db
Filter: 90Hz 24 db/oct
Power: 100mA with self resetting fuses
At 40db of gain, 0dbu output and a 150 ohm source
Harmonic Distortion : 0.5% second harmonic
Noise: -84dbu
Frequency Response: 6Hz to 80Khz
Tube: 12AX7B, selected for low microphonics
Lundahl Mu metal shielded transformers for both input and output