Threshold Model 400a
Dates[edit]
General
- Manufacturer:Threshold
- Model:400A
- Dimensions: 48.26 cm W x 39 cm H x 28 cm D
- Weight: 23 kg
Connections
- list the connection options here, if known.
Technical Data
- Nominal power:
- 100 watts per channel, both channels into 8 ohms, 20 Hz to 20 kHz at 120 volts powered Line source.
- Harmonic and Intermodulation Distortion:
- Not greater than 1 percent, Total Harmonic or Intermodulation distortion at rated power, decreasing monotonically with lower power. Distortion virtually immeasurable at low levels. Distortion components are dominated by 2nd and 3rd harmonics. Intermodulation sidebands 1st and 2nd order. Higher order distortion components are negligible below 40 kHz.
- TID:
- Transient intermodulation distortion sidebands are at least-75dB below a 10 watt output signal consisting of a 1.5 kHz sine linearly mixed with -20 dB 80 kHz sine. the sidebands are symmetrical about the central decreasing in frequency to about -90 dB by the seventh order.
- Ancillation time:
- Front and back edge 1 microsecond.
- Rate of rise Capacities:
- Maximum voltage slew rate of each channel 50 volts per microsecond. Maximum current consumption slew rate each channel 25 amps per microsecond.
- Loop Run Time:
- Signal propagation time appear at base of input differential transistors 20 microseconds.
- Current Output Capacities:
- Maximum instantaneous output current 20 amps per channel. Maximum continuous output current of 5 amps per channel.
- Voltage Output Capacities:
- Maximum voltage swing - + 50 volts per channel.
- Frequency bandwidth:
- +0, -3 dB 1 Hz to 250 kHz at low levels. - 0 dB 20 Hz to 20 kHz at 200 watts per channel.
- Input impedance:
- 75 kOhm
- Attenuation factor:
- 100 Constant measured from DC to 20 kHz at output terminals.
- Noise level:
- 5 millivolts at outputs.
- Displays:
- Individual peak vs high output level readings for each channel.
Pictures[edit]
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