Crane Song Insigna

Eq with 3 bands plus Hi cut and Low cut filters – 500 Series

INSIGNA is a tube equalizer in a 500 series package, using a dual triode circuit with a 12AX7 tube.

The eq has 24 db/oct high pass and low pass filters each with 7 frequencies.
The top and bottom band are shelving each with 8 frequencies
The mid band is peaking with 8 frequencies.

The three bands work by using buffered RC circuits in the negative feedback path around the tube amplifiers. The result is a fat sounding eq rich in second harmonic triode tube color.

Specifications

• Maximum input: +24dbu
• Maximum Output: +25dbu
• Frequency Response: 1Hz to 100KHz
• Noise Floor: -84 dbu 20Hz to 20KHz
• Input Impedance: 32K ohms
• Output Impedance: 160 ohms
• Current Consumption: 120mA
• Weight: 1.7 lbs
• Number of Channels: 1
• Number of EQ Sections: 37
• High Pass: 7 + Flat
• Low Pass: 7 + Flat
• Low Shelf: 8 (10 Hz – 200 Hz)
• Mid Bell: 8 (150 Hz – 7.2 kHz)
• High Shelf: 8 (3.2 kHz – AIR)
• Bypass Switch: True Bypass – Hard Bypass