AM 660 Specifications
Input Impedance: 20KΩ, balanced
Output Impedance: less than 50Ω
Max. Output Level: +22dBu, balanced
Input Gain: -15 to +15 dB
Frequency Response: +/- 1 dB from 40Hz to 15kHz
Noise Level: better than 73dB below +4dBu, 0-30kHz
Limiting Noises: same level as a vintage 660 with GE five
star 6386 tubes and properly balanced
Total Harmonic Distortion: level- and compression-dependent
Compression Ratio: Variable from 1: 1 to 20:1, level-dependent
Time Constants: 1-6 are the classic 660 time constants, 2a and 2b are variations on #2
| Position |
Attack Time |
Release Time |
|
| 1 |
0.2ms |
0.3s |
| 2 |
0.2ms |
0.8s |
| 2a |
0.2ms |
1s |
| 2b |
0.2ms |
2s |
| 3 |
0.4ms |
2s |
| 4 |
0.8ms |
5s |
| 5 |
0.4ms |
Auto, as in 660 #5 |
| 6 |
0.2ms |
Auto, as in 660 #6 |