Bryston 3b 4b 7b 8b st owners manual

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BRYSTON
OWNERS MANUAL

Instructions For Bryston
ST Series Amplifiers
Models 3B, 4B, 7B and 8B

Page 2

GEN ERAL INSTRUCTIONS

Warranty information:

Thank you for choosing a Bryston product. We
welcome any suggestions you may have, or com-
ments regarding the operation of your amplifier.
We consider you, our customer, to be Brystons
most important resource and your opinion is very
much appreciated.

Bryston products are warranted to be free from
manufacturing defects for a minimum of 20, (twen-
ty), years from the original date of manufacture.
This includes all parts, labor and one-way return
shipping. This warranty covers the original owner
and any subsequent owners. The warranty is
retroactive for any Bryston product purchased
within the last twenty years. Tampering by any-

one other than factory authorized personnel voids
the warranty.

Warranty service may be obtained by returning
the unit to any authorized Bryston dealer or dis-
tributor. You may also contact the Bryston facto-
ry directly at the location listed on the rear page
of this manual.

Please keep the original box and all packing
material. This will ensure the amplifier is protect-
ed in the unlikely event you have a problem and
must return it for service.

No warranty card is necessary to initiate your cov-
erage. Please refer to the back page for more
detailed warranty information.

Setup Recommendations:

We recommend that you do not place the ampli-
fier in a totally enclosed area. Allow some space
at the top, sides and back as your Bryston ampli-
fier relies on convection cooling and some air flow
is desirable.

Make sure the power switch on thefront of the
amplifier is in the off (out) position. Plug the power
cord (female end) into the rear of the amplifier,
then insert the male end into the wall outlet.

All Bryston amplifiers contain high quality, ded-
icated circuitry in the power supplies to reject RF,
line spikes and other power-line problems. Bryston
power amplifiers do not require any specialized

power line conditioners. Simply plug the amplifi-
er directly into its own wall socket.

Make sure the stereo switch is in the individ-
ual (stereo) position and connect your loud-
speakers, ensuring that the positive (red) and
ground (black) terminals on your amplifier are
connected to the positive and ground terminals
on your speakers. Connect the right and left out-
puts from your preamplifier to the right and left
inputs of the amplifier. Check that the rear panel
switch for choosing the balanced (XLR) or non-bal-
anced (RCA) input is in the proper position for
your installation.

Clipping indicators:

All Bryston amplifiers use bicolor LEDs with green indi-
cating power on and red indicating actual overload or
distortion. If the LED indicator contains a substantial red
content, it should be considered as a sign that the level
is too high and may cause speaker damage if it contin-
ues. It should be remembered that the Bryston ST series
are powerful amplifiers, and that it is possible to dam-
age almost any speaker if an amplifier is used in a thought-
less or abusive manner, and that Bryston cannot be
responsible for damage caused in this manner.

The clip-sensing circuit uses an AC comparator to
detect any source of signal distortion including clipping,
short circuits in cabling, excessive DC or supersonic sig-

nals, whether at the input or output. Most conditions
which could cause the red LED to light for more than a
moment or two can be dangerous to your loudspeakers
and should be corrected immediately.

It is normal for the individual LEDs to decay at differ-
ent rates, sometimes with colour changes, when the
amplifier is turned off.

If one or both of the LEDs go out, check to see if any
of the the fuses, (located on the back panel just above
the power cord), has blown.

CAUTION: Replace fuses only with the type and
size listed on the amplifier rear panel.

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