Bryston 4B Cubed Dual-Mono Amplifier

Meet the Incomparable 4B Cubed Dual-Mono Amplifier 
 

Since 1978 the 4B Cubed has been revered, now its even better!

A rarified few components in audiophile lore have become so ubiquitous that nearly every music lover once had, lusted after, or if they're really lucky, currently owns one.

One such legendary item is the Bryston 4B. This product has been manufactured continuously (though often refined) since 1978. Currently this venerated amplifier is on its 6th generation, and it's never been better.

Now rated at 300 watts per channel into 8 ohms, (and upwards of 500 into 4 ohms), this true dual-mono amplifier is powerful enough for practically any speaker, yet it's priced to remain within reach. The degree of clarity, power, nuance, and outright truthfulness of this amp is stunning. If you've always wanted one, maybe now is just the right time.

Brystons Cube Series

At Bryston, finding ways to eliminate distortion from of their designs is a way of life. All Cubed Series electronics feature a new patented input circuit precisely optimised and linear beyond any they’ve used before. Featuring twelve active devices in a groundbreaking array, this new circuit both matches the amplifier to virtually any preamplifier and provides the first 6dB of gain. 

The new input stage is so transparent, its measurable distortion is less than 1/1000th of 1 percent! Newly designed circuitry in the Cubed Series amplifiers is virtually impervious to noise such as RFI and others induced by external and environmental causes. Bryston's patented Salomie Circuit feature a unique method of trapping distortion components in the main signal path that pass through other amplifiers only to be amplified and played by your loudspeakers. This innovative distortion reduction method results in a much more natural and nuanced rendition of your recordings—playback more true to the original recordings and more enjoyable to your ears. 

Quad-Complementary topology improves linearity to a new standard of accuracy while virtually eliminating aggressive higher harmonic distortion byproducts. Quad Complementary eliminates crossover distortion by improving transistor matching and reduces capacitance in the output stage by a factor of four which improves transient response and bandwidth. The overall harmonic distribution of Bryston’s Quad-Complementary output mimics the characteristics of a class-A design but with dramatically lower distortion. Each amplifier channel includes its own fully independent power supply with separate transformer; a feature uncommon even in amplifiers far more expensive. 

Bryston engineers strive for accuracy and transparency because that is what sounds best. When a playback system is faithful to the recording, the listener can enjoy the most subtle details, capturing the depth and soul of the performance as the artist intended.  

Product Features
Balanced XLR and Single ended RCA input
2 Channels each with fully independent power supplies including transformers
300W into 8 ohms (and up to 500 into 4 ohms) per channel
The patented Salomie circuit found in all Cubed Series amplifiers
Switchable gain (23dB or 29dB)
Fully convection cooled means no noisy fans
Machined and anodized aluminum enclosure and dress panel
Less than 500mW standby power consumption
SoftStart microprocessor controlled startup sequence won't trip circuit breakers
DC trigger for automated turn on and turn off
Legendary Bryston 10 Year Warranty
Technical Specifications

Frequency Response
Noise
RCA: -106dB
XLR: -117dB

THD+N (20Hz-20kHz @ Rated Power, 8Ω)
Power Output
300W @ 8Ω | 500W @ 4Ω

Input Impedance
Unbalanced 7.5kΩ
Balanced  30kΩ+ / 6kΩ-
Faceplate Finishes
Black
Silver

Faceplate Sizes (non rack mountable)
17" (43.18 cm)
19" (48.26 cm), with front mounted handles

Dimensions (W x H x D)
17" (43.18 cm) or 19" (48.26 cm) x 16 cm x 39.37 cm (or 45.09 with front handles)

 

 

*This information has been obtained from Manufacturers website. We advise that Features, Specifications & Price are subject change without notice.

E&OE