Bryston 3BSST2, Руководство пользователя

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GENERAL INFORMATION
INTRODUCTION
Thank you for choosing an SST
2
SERIES Stereo Power Amplifier .
Bryston welcomes any suggestions you may have, or comments regarding the operation of your amplifier. We consider
you, our customer, to be Bryston’s most important resource, and your opinion is very much appreciated.
DESCRIPTION 3B
SST
2
The 3B
SST
2 is a dual mono design audio power amplifier with two channels of 150W each. Each channel has switch select-
able balanced and single ended inputs and independent gain selections of 29dB or 23dB. These SST
2
amplifiers also have
SoftStart power control circuitry to eliminate high inrush currents when A/C power is applied. The power-up or turn-on of
the 3B
SST
2
may be activated by the push-button switch located on the front panel or by hard wired remote control voltage.
DESCRIPTION 4B
SST
2
The 4B
SST
2
is a dual mono design audio power amplifier with two channels of each. Each channel has switch selectable
balanced and single ended inputs. Each channel also has switch selectable gains of 29dB(1v) or 23dB(2v). The 4B
SST
2
includes SoftStart power control circuitry to eliminate high inrush currents when A/C power is applied. The power-up or
turn-on of the 4B
SST
2
may be activated by the push-button power switch on the front panel or via hard wired remote control
voltage.
SHIPPING BOX & PACKING MATERIAL
Please keep the original shipping box and all packing material. This will ensure the amplifier is protected in future transport.
In the unlikely event you have a problem and must return it for service you must use the proper packing material. Ship
the amplifier only in the original packing material, as the unit is not insurable by carriers otherwise. Replacement packing
materials, consisting of a shipping carton with plastic foam inserts, is available from Bryston.
VENTILATION
The most important installation consideration is ventilation. All SST
2
amplifiers are convection cooled. Unrestricted air-flow
across its heat sinks is a must. For this reason do not install anything directly above it. Allow at least 3.5 inches (2 rack
units of 1.75" each) of space above and 1" to either side of this amplifier. Do not install directly above other heat generating
equipment. Should your instillation conditions be constricted, then additional forced air-cooling may be necessary. Bryston
can provide an optional fan package if required. Any SST
2
channels thermally shutting down during operation indicates
insufficient air flow, and a remedy must be found for cooling the amplifier. Provide a minimum 6” space to the rear of the
amplifier for ventilation and dressing cables to and from the amplifier.
Never operate the amplifier in a vertical position .
WIRING THE SST 2 AMPLIFIER
(also see rear panel description)
Speaker wires should be as short as practical. Use quality wire, and if runs are more than 3 meters use at least 12 gage
wire. The speaker binding posts will accept wire up to 3 gage in size. Bryston will custom build cables for your application.
A/C POWER
Before plugging in the power cord be sure your SST
2
amplifier is specified for the correct a/c voltage for your locality.
The voltage is listed on the label found at the upper right of the rear panel. The circuit feeding the 4B SST
2
should be suf-
ficient so as not to cause the circuit breaker to trip. For example, the 4B SST
2
when operated with both channels deliver-
ing maximum power into 4 ohm loads will consume all the available power in a normal North American residential circuit
(15 Amps), therefore a dedicated electrical circuit may be necessary with this situation. Never lift the safety ground to the
amplifier nor 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.