Bryston 3B³ Cubed 2.0 Stereo Power Amplifier

The Bryston 3B³ Cubed 2.0 brings the technology and build quality of Bryston's larger Cubed Series amplifiers into a more compact stereo power amplifier.

Delivering 200 watts per channel into 8 ohms and 300 watts per channel into 4 ohms, the 3B³ has more than enough power for a wide range of high-performance loudspeakers while maintaining the low noise, control and reliability Bryston amplifiers are known for.

And despite being one of Bryston's smaller power amplifiers, the 3B³ doesn't use a simplified architecture. Each channel has its own fully independent power supply and transformer, giving it true dual-mono construction inside a chassis only 10.75 inches deep.

200 Watts Per Channel

The 3B³ delivers:

• 200 watts per channel into 8Ω
• 300 watts per channel into 4Ω

That's a useful sweet spot for a serious two-channel system.

There's enough power and current available to properly control a wide range of stand-mount and floorstanding loudspeakers without automatically moving into the size, weight and output capability of Bryston's larger amplifiers.

True Dual-Mono Architecture

Inside the 3B³ are two amplifier channels with fully independent power supplies and transformers.

That means the left and right channels aren't relying on a single shared transformer.

It's the same fundamental approach Bryston uses in its larger Cubed Series amplifiers and helps provide excellent channel separation, power delivery and control when the music becomes demanding.

Full Cubed Series Technology

The smaller chassis doesn't mean you're getting a stripped-down Bryston.

The 3B³ incorporates the same patented Salomie circuit found throughout Bryston's Cubed Series.

The design focuses on reducing noise and distortion while preserving low-level detail, neutrality and dynamic performance.

Total harmonic distortion plus noise is rated at less than 0.005% from 20Hz to 20kHz at rated power into 8 ohms.

Compact Where It Matters

One of the biggest advantages of the 3B³ is its depth.

At just 10.75 inches deep without front handles, it's considerably easier to accommodate in shallow equipment cabinets, custom millwork and installations where a conventional full-depth power amplifier may be difficult to fit.

You still get a substantial 35-pound Bryston amplifier—just without requiring nearly as much cabinet depth.

That makes the 3B³ equally interesting for a dedicated two-channel system or a professionally designed custom installation.

Balanced XLR & RCA Inputs

The 3B³ provides both:

• Balanced XLR inputs
• Single-ended RCA inputs

Switchable 23dB or 29dB gain provides additional flexibility when matching the amplifier with different preamplifiers.

A 12V DC trigger allows automated power control when the amplifier is integrated with compatible preamplifiers, processors or control systems.

Passive Cooling — No Fans

The 3B³ is fully convection cooled, eliminating the need for noisy cooling fans.

Bryston also incorporates a microprocessor-controlled SoftStart sequence designed to manage startup current and reduce the chance of tripping a circuit breaker when the amplifier powers on.

Standby consumption is less than 500mW.

Built in Canada

Like Bryston's larger Cubed Series amplifiers, the 3B³ is housed in a machined and anodized aluminum enclosure and built in Canada.

Bryston backs the amplifier with its legendary 10-year warranty, making the 3B³ an amplifier designed for long-term ownership rather than constant replacement.

Key Specifications

• Type: Dual-Mono Stereo Power Amplifier
• Power Output at 8Ω: 200W × 2
• Power Output at 4Ω: 300W × 2
• Frequency Response: <1Hz–100kHz, -3dB
• THD+N: <0.005% from 20Hz–20kHz at rated power into 8Ω
• Inputs: Balanced XLR and single-ended RCA
• Gain: Switchable 23dB / 29dB
• RCA Noise: < -106dB
• XLR Noise: < -111dB
• Unbalanced Input Impedance: 7.5kΩ
• Balanced Input Impedance: 30kΩ+ / 6kΩ-
• Cooling: Passive convection — no fans
• 12V Trigger: Yes
• SoftStart: Microprocessor controlled
• Standby Consumption: Less than 500mW
• Dimensions: 18" W × 6" H × 10.75" D
• Depth with Front Handles: 12.75"
• Weight: 35 lbs.
• Warranty: 10 years
• Made in Canada

Available Configurations

The Bryston 3B³ Cubed 2.0 is available with several front-panel configurations:

• Consumer faceplate without handles
• Consumer faceplate with handles
• PRO rackmount faceplate
• PRO rackmount faceplate without handles

3B³ or 4B³?

For many systems, this is the real question.

The 3B³ gives you 200 watts per channel into 8 ohms and 300 watts into 4 ohms, along with the same fundamental Cubed Series technology found in the larger 4B³.

The 4B³ moves up to 300 watts per channel into 8 ohms and 500 watts into 4 ohms for more demanding loudspeakers and greater power reserves.

But the 3B³ has another advantage: its shallow 10.75-inch chassis.

If your loudspeakers don't require the additional output of the 4B³—or installation depth is important—the 3B³ can be the smarter choice.

Experience Bryston at The Grid HiFi

The Grid HiFi is your Bryston and high-end audio expert in Houston, Texas.

Choosing between the 3B³, 4B³ and Bryston's larger amplifiers should come down to the loudspeakers, room and how the system will actually be used—not simply buying the amplifier with the biggest power number.

The Grid can help match the 3B³ with the right loudspeakers, preamplifier, DAC, streamer, turntable, phono stage, subwoofers, cabling and equipment support to build a properly balanced two-channel system.

For listeners who want Bryston's Cubed Series performance in a more compact amplifier with plenty of real-world power, the Bryston 3B³ Cubed 2.0 hits a particularly useful sweet spot.

Contact The Grid HiFi for Bryston 3B³ Cubed 2.0 availability, demonstrations, system matching and professional setup.