Bryston 9B?SST2, Руководство пользователя

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9B
SST
2
FIVE CHANNEL POWER AMPLIFIER
SPEAKER WIRES
Wires connecting the amplifier to the speaker should be as short as practical . Use quality wire and if runs are more than
3 meters use at least 12 gauge wire . The speaker binding posts will accept wire up to 3 gauge wire . Bryston can custom
build cables for your application .
AC POWER
Before plugging in the power cord be sure your 9B
SST
2 is specified for the correct AC voltage for your locality . The voltage
is listed to the right of the power input connector . The circuit feeding the 9B
SST
2 should be sufficient so as not to cause the
circuit breaker to trip . Note: the 9B
SST
2 when operated with all channels at maximum power into 4 ohm loads, can consume
all the available power in a normal household circuit, therefore a dedicated electrical circuit may be necessary with this
situation . Never lift the safety ground to the amplifier or remove the ground pin from the plug .
POWER CONDITIONERS
Bryston urges caution in choosing a power conditioner for your audio/video system . Large power amplifiers can draw very
substantial current from the wall plug, and many so-called power conditioners can in fact hinder the supply of current by
inserting resistances in series with the line cord . However, there are now power conditioners that can reduce or eliminate
RF and 'hash' from the AC supply and may actually improve current delivery to your system . This type of power condi-
tioner (exemplified by 'TORUS' Power Conditioners) uses the energy storage in a large toroidal transformer to provide high
instantaneous power and reduce the substantial AC output resistance of the wall socket and house wiring . This resistance
can be in the range of 0 .5 to 1 Ohm and is typically reduced to only a few milli-Ohms by the Power Conditioner . That in turn
considerably reduces Voltage drop in the power line on high current surges and quite substantially increases the stability
of the power line improving audio (and video) focus, precision and clarity .
REAR PANEL DETAILS
1. INPUT SELECT SWITCH.
Each 9B
SST
2 channel gives the user the option of switching between
either balanced input or single ended input .
2. BALANCED INPUT CONNECTOR (Z
in
≈ 20k )
This input connector accepts standard ‘XLR’ or 1/4” Tip-Ring-Sleeve .
Use quality, 100% shielded cables with gold plated connectors .
3. SINGLE ENDED (UNBALANCED) INPUT (Z
in
≈ 30k)
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 sys-
tems provide noise protection from external electrical interference, so
cable length can be very long (50m or 164 ft) or longer .
The single ended or unbalanced input is provided for pre-amps with-
out balanced output . Single-ended cables should be kept to 10m (33 ft)
or less . In general never use longer cables than necessary, never coil
excess cable length, and run signal wires away from AC power or speak-
er cables .
4. POLARITY SWITCH ( 0 OR -180 DEGREES)
Each 9B
SST
2 channel gives the user the option of inverting the polarity of the input signal -180 degrees .
Polarity inversion is application specific . The normal operating position is 0 degrees.
5. GAIN (SENSITIVITY) SWITCH.
The 29dB setting is the usual home theatre setting for single ended or un-balanced operation . It provides the most
amplifier gain and the greatest sensitivity (1V
in
= 100W @ 8 ohms with signal-to-noise of -110 dB) . A signal level of
1 .1V at the input is required to deliver the rated output of 120W into 8 ohms .
The 23dB setting is the usual home theatre setting when using balanced inputs . Or use this setting with any sys-