Overview

The Bryston 2.5B Cubed is a sophisticated dual-channel amplifier that brings the legendary clarity and reliability of the Cubed series into a more compact, space-efficient chassis. It addresses the needs of audiophiles who require high-resolution amplification for smaller rooms or high-efficiency speakers, providing a robust 135 watts per channel into 8 ohms. By utilizing Bryston’s patented Salomie input circuitry and a precision-engineered power supply, the 2.5B Cubed delivers a transparent and neutral soundstage with a vanishingly low noise floor. This convection-cooled amplifier is built to the same exacting standards as Bryston's larger models, ensuring a lifetime of musical enjoyment without the bulk of a full-sized power stage.

Simcoe Audio Video Insight

The 2.5B Cubed is the perfect entry point for those looking to experience true Bryston performance without over-powering a smaller listening environment. In our experience, it is an exceptional partner for high-end bookshelf speakers or secondary zones in a multi-room setup. Despite its smaller stature, it retains that signature "unshakeable" grip over the music and the absolute silent operation that convection cooling provides. It’s a refined, professional-grade tool that proves you don't always need massive wattage to achieve a high-fidelity experience.

Pro Tip: Best for high-resolution desktop systems or dedicated den setups. Because the 2.5B Cubed can be bridged into a monoblock configuration to deliver 400 watts into 8 ohms, it provides a unique opportunity to start with a single stereo unit and add a second later if you eventually move to larger, more demanding floorstanding speakers.

More Details

Why It Wins

• Salomie Circuitry: Employs a unique, patented input stage that dramatically reduces noise and distortion, resulting in a cleaner and more lifelike audio presentation.
• High-Current Delivery: Provides 135W per channel into 8 ohms and 180W into 4 ohms, ensuring plenty of dynamic headroom for detailed musical peaks.
• Fan-less Convection Cooling: Utilizes oversized external heat sinks to dissipate heat naturally, ensuring the amplifier remains completely silent during operation.

What Makes It Different

The 2.5B Cubed distinguishes itself by offering reference-level sound quality in a form factor that is significantly more versatile than traditional high-power amplifiers. While many compact amps use Class D technology to save space, Bryston maintains a traditional high-current Class AB design, preserving the natural warmth and texture of the original recording. It also features a built-in soft-start circuit and comprehensive protection monitoring, ensuring that the amplifier operates safely and reliably for decades. This blend of compact design and no-compromise engineering makes it a staple in both high-end homes and professional broadcast studios.

Technical Highlights

• Ultra-Low Noise Floor: With a signal-to-noise ratio of -110dB, this amplifier ensures that even the most delicate micro-details in a recording are heard with total clarity.
• Precision Build: Hand-assembled and extensively tested for 100 hours before leaving the factory to ensure every unit meets Bryston’s strict performance specifications.
• Dual-Gain Settings: Features switchable 23dB or 29dB gain, allowing for a perfect interface with a wide range of preamplifiers and digital-to-analog converters.

Buyers Guide

Who This Is For

• The Detail-Oriented Minimalist: Ideal for listeners who prioritize transparency and accuracy but have limited rack or shelf space.
• The Professional Studio Engineer: Perfect for near-field monitoring environments where a silent, neutral, and reliable power source is required.

What To Pair It With

• Bryston BP-17 Cubed Preamplifier: Matches the amplifier's transparency and neutral character for a perfectly balanced signal chain.
• DALI SONIK 1 Bookshelf Speakers: The 2.5B Cubed provides incredible control and air, making it the ideal partner for the 5.25-inch wood fiber drivers and soft dome tweeters.

Alternative Options

If you require more power for a larger room or less efficient speakers, the Bryston 3B Cubed provides 200W per channel in a similar design. For those looking for the ultimate stereo solution, the Bryston 4B Cubed is the flagship dual-channel option with 300W per channel. If you are looking for a more compact and integrated wireless solution, the Bluesound POWERNODE offers built-in streaming and amplification for secondary rooms.