Bryston 28B SST - Manual (Page 2)

IntroducIng the 28B SST MONO AMPLIFIER
OuR MISSION
To design a state of the art 1000 watt power amplifier that
does not compromise performance at 1/10th power.
A significant part of the design criteria for the 28B SST
was to develop a very powerful amplifier that would
drive any speaker on the planet but maintain an ideal
power curve at 1 watt as well as at 1000 watts and every
power level in between. Most amplifiers exhibit a power
curve whereby the best noise floor, drive capability and
distortion is maintained from about 1/3 power and up.
The Bryston 28B-SST Mono amplifier maintains its
power curve right from the first watt. This results in a
BIG POWERFUL amplifier that sounds incredibly
detailed and musical at very low levels and maintains that
same sophistication and drive capability with even the
most difficult, inefficient speakers, large or small.
The Bryston 28B-SST is a fully balanced output amplifier
(BRIDGED), which has reduced THD and IMD to
unprecedented low values, (typically 0.001% or less), for a
new degree of transparency, musicality and ease of listening.
Superbly low noise floor, typically below – 115dB, yields
an inky black silence between notes for hauntingly realistic
reproduction. Tremendous power reserves give the 28B-
SST virtually perfect freedom from overload on any type
of speaker or music, bringing the performance and realism
directly into your listening environment. The 28B’s ability to
resolve subtle musical details has to be heard to be believed
– it truly sets a new standard : Mission accomplished.
FEATuRES
• Selectable input – balanced (xlr) or single ended (rca)
• Selectable gain - 1v = 29db or 2v = 23dB
• External power on off control - 12v trigger
• New micro controlled soft start
• New power switch
• All A/C is totally shielded from Audio circuits
• Maintains exceptionally low noise and distortion
from very low to very high power demands
HEAT SINkS
The Bryston 28B-SST employs a total new computer modeled
heat sink design maximizing heat dissipation for long-term
“fan-free” operation into the most demanding speaker loads.
POWER SuPPLY
The Bryston 28B-SST is a single channel mono block
power amplifier capable of delivering over 1000+ watts of
power. To provide this power the 28B POWER SUPPLY
utilizes a 2000 VA custom power transformer, with
120,000 uf of filter capacitance, supply rails of +/- 90v.
The component layout has been optimized so power path
lengths are very short, and all wire has been eliminated
after the power transformer.
2
2000 VA Power Supply Heatsink Design Maximizing
Heat Dissipation For Long-Term
“Fan-Free” Operation