Images shown in silver finish.
Powerful, Reliable, and Musically Accurate
The Bryston 2.5BSST2 is a compact, high quality, dual-channel (stereo) amplifier intended for use in home sound systems requiring musically accurate, extremely reliable, no compromise amplification. It's very powerful, particularly in bridged mono mode.
The two-channel 2.5BSST2 power amplifier boasts a power output of 135 watts-per-channel into 8 ohms and 180 watts-per-channel into 4 ohms). A switch allows the amp to operate in bridged mono mode, delivering 360 watts into a single channel into 8 ohms. Among the Bryston's many features are balanced and unbalanced inputs with selectable gain at 23 or 29 dB.
For exceptionally quiet operation, the 2.5BSST2 offers regulated power supplies to all voltage gain stages and independent power supplies for each channel. There are no fans or other moving parts that might introduce noise or distortion. The amp is convection cooled and housed in a fully aluminum chassis.
Bryston SST2 C-Series
Bryston's SST2 C-series amplifiers are the direct results of the company’s ongoing quest to improve its already legendary SST C-Series product line.
For over 30 years, Bryston has committed itself to designing and manufacturing the most accurate and reliable audio electronics. The performance, value, and reliability of Bryston amplifiers, and the unrivaled warranty, have earned the company critical acclaim and awards worldwide.
Bryston maintains an extensive research and development program, constantly investigating techniques, technologies, and devices that promise improvements to all aspects of its amplifiers. The Bryston SST2 C–Series is the direct result of this ongoing quest, and represents a significant step forward in the art and science of audio amplification.
The SST2 C-series answers the need for today's increased dynamic range and clarity in recordings and movie soundtracks. The end result surpasses the parameters of the most demanding material available.
The Bryston SST Series
Bryston's SST-series amplifiers represent a significant step forward in the art and science of audio amplification. Among the advances included in this new SST Series are faster, more linear and more reliable output transistors for better high frequency accuracy. Doubled filter capacitance provides even deeper and better-controlled bass. A new proprietary grounding protocol eliminates the need for ground-lift switches and reduces system noise. A new computer-modeled heatsink profile offers cooler operation and longer component life.
Sound quality is improved to a stunning degree. Reviewers agree, this new product line sets a higher standard for musical accuracy than ever before possible.
Design Philosophy Ensures Sonic Superiority
From input to output, all the circuitry has been optimized for the most accurate performance possible. All analog signal circuitry is fully discrete to avoid the compromises, phase shift, and non-linearities inherent in IC's. The amplifiers incorporate an innovative gain stage topology, which yields a substantially lower noise floor through the use of low-impedance pathways within the amplifier, and has strong advantages in reducing overall distortion.
Bryston's computer controlled distortion analyzers confirm that IM distortion of less than 10 parts per million (below 0.0009%) are typical for this new circuitry. All SST amplifiers use Bryston's proprietary output stage, which we call "Quad-Complementary." The Quad-Complementary topology improves linearity to a new standard of accuracy, while virtually eliminating aggressive higher harmonic distortion products.
The overall harmonic distribution of Bryston's Quad-Complementary output stage closely approaches an ideal Class-A output, except that the overall distortion is actually much lower. (True class-A output stages suffer from relatively high current-induced distortion levels, consisting of mostly lower-order harmonics).
The listening characteristics display a high degree of transparency without harshness or grain. The annoyances previously ascribed to 'transistor sound' are absent, and the amplifier seems to combine the seductive lushness of tube equipment with the focus and accuracy of solid-state.
Modular Design/Independent Power Supplies
No matter how good an amplifier's signal path may be, it's meaningless if it's starved in the power supply, an all too common way of cutting costs. One of the things that makes the Bryston SST Series unusual is the company's insistence that every amplifier in the line have a completely separate and independent power supply for each channel, including its own toroidal transformer.
Bryston's research has shown that separate power supplies provide the best imaging, clarity, and dynamic range , all attributes that are especially crucial given the emerging and demanding high resolution digital sources. The power supplies employ multiple filter capacitors per channel, rather than single pairs of larger filter cans, allowing improved high frequency response, and reducing overall losses in the supply. In the 9B SST, and 6B SST models, Bryston carries the modular concept further, making the channels removable.
Bryston uses only the finest components, such as 0.1% metal-film resistors, polypropylene capacitors, custom-wound toroidal transformers, and hand-matched transistors, to reduce noise and distortion to the absolute minimum. Gold-plated balanced or single-ended (RCA) input connectors are standard as well as gold-plated 5-way loudspeaker binding posts, to eliminate possible causes of distortion from corrosion. As befits products intended for use on stage as well as in the home, the SST chassis are extremely robust.
SST2 amplifiers offer feature flexibility. For example, all allow a choice of input connection — balanced XLR-F, balanced 1/4" phone, or single-ended RCA jack — together with a switch to select gain settings. A trigger input allows system-wide on/off control. Overall, the SST Series itself facilitates flexibility in putting together the total system through a variety of channel and power output.
Unique Burn-In Procedure
For Each and every Bryston audio product undergoes an extensive quality control "burn-in" procedure. Following a complete operational checkout, every amplifier is placed on a test-bench and run for 100 hours at full output (one-hour on/one-hour off for additional thermal stress), with a high frequency square-wave input and a capacitive load. This extremely rigorous burn-in quickly "matures" components and weeds out any potential premature failures. The result is reliable trouble-free performance for many years.