The Crane Song Insigna is a 3-band tube equalizer in the convenient 500 Series format. Using a dual-triode circuit with a 12AX7 tube, Insigna sports 24dB/oct high- and lowpass filters, each with seven frequencies. Top and bottom bands are shelving, each with eight frequencies. The mid band, also with eight frequencies, is peaking. The three bands use buffered RC circuits in the negative feedback path around the tube amplifiers. The result is a fat sounding equalizer, rich in second-harmonic triode tube color.
Crane Song Insigna Features:
- 3-band tube equalizer in the convenient 500 Series format
- Uses dual triode circuit with a 12AX7 tube
- 24dB/oct high- and lowpass filters (each with seven frequencies)
- Top and bottom bands are shelving, each with eight frequencies
- The mid band, also with eight frequencies, is peaking
