Bryston 3B SST User Manual
Page 4
3B SST and 4B SST Series Amplifiers
2
Rear Panel Input / Output Connections
1. Input Select Switch.
Each SST channel gives the user the option of switching between either balanced input or single ended input.
2. Balanced Input connector. ( Imp. 20k )
This input connector accepts standard ‘XLR’ or 1/4” TRS .
Use quality, 100% shielded cables with
gold plated connectors.
3. Single Ended Input. ( Un-balanced input ) ( Imp. 50k )
This input connector
accepts standard ‘RCA’ or ‘Phono’ connectors.
Use quality, 100% shielded cables with
gold plated connectors.
Balanced input Vs Single ended input:
The balanced input requires a balanced pre-amp source. Balanced systems provide noise rejection from external
electrical interference, so cable length can be very long ( 50m or longer ).
The single ended or unbalanced input is provided for pre-amps without balanced output. Single-ended cables should be
kept to 20’ (7m) or less. In general never use longer cables than necessary, never coil excess cable length, and keep
signal wires away from AC power or speaker cables.
4. Input Sensitivity (Gain) Switch.
The optimum gain setting will depend upon the source pre-amp operating level, and or personal preference.
The 1v setting is used when the source is
single-ended, or from a transformer coupled balanced source.
This is the
home theatre setting for single ended or un-balanced operation.
The 1v setting provides the most amplifier gain - 29 dB. (1v in = 100w @ 8 ohms.) (noise -110 dB)
The 2v setting is used when the sources output is actively
Balanced.
This is the
home theatre setting for balanced operation Or use this setting with any systems where
the volume control rotation is limited to the bottom half of the control or less.
The 2v setting provides an amplifier gain - 23 dB. ( 2v in = 100w @ 8 ohms.) ( noise -113 dB )
The noise is referenced in dB below rated output. Different input configurations result in slightly different noise readings.
The above noise ratings represent minimum readings, actual readings may be better.
5. Mode Switch. (individual or bridge mode)
The individual setting is for two channel operation.
Bridge mode is for mono operation.
6. Level Control. (pro models only)
The level control will attenuate the input signal level from 0dB through -14dB.
PUSH
PUSH