Bryston 4B Solid State Stereo Power Amplifier – 250W/Ch

Bryston 4B Solid State Stereo Power Amplifier – 250W/Ch

The Bryston 4B is a solid-state stereo power amplifier designed for high-output audio applications. It delivers 250 watts per channel into 8 ohms and 400 watts per channel into 4 ohms, with up to 800 watts into 8 ohms in bridged mono operation. Its high current delivery, low distortion, and high damping factor make it well suited for demanding speaker systems and professional audio applications.

Specifications

• Model: Bryston 4B
• Type: Solid-state stereo power amplifier
• Output Power: 250W continuous/channel into 8 ohms (24dBW)
• Output Power: 400W RMS continuous/channel into 4 ohms (23dBW)
• Bridged Output: 800W continuous into 8 ohms (29dBW)
• Current Delivery: 16A continuous, 48A peak per channel
• Frequency Response: 1Hz–100kHz, ±3dB at 1W output
• S/N Ratio: 108dB below rated output; 90dB IHF
• Input Sensitivity: 1.4V for 250W/channel into 8 ohms
• Voltage Gain: 30dB
• THD + Noise: 0.01%, 20Hz–20kHz
• IM Distortion: <0.01% at rated power, 60Hz + 7kHz, 4:1 SMPTE
• Damping Factor: >500 at 20Hz, 8 ohms
• Output Impedance: <0.016 ohms
• Input Impedance: 50k ohms unbalanced / 30k ohms balanced
• Polarity: Non-inverting

Condition

A previously used item that exhibits cosmetic wear and is fully operational and functions as intended.

The Bryston 4B is a powerful, high-current stereo amplifier with substantial output capability and bridged operation, making it suitable for both professional and high-performance audio systems.

• At Tone House, we're not just sellers, we're passionate musicians, gear aficionados, and seasoned professionals dedicated to the craft of making music. We take pride in our curated music collection. We love giving these vintage and rare pieces new life through maintenance and upkeep. Our goal is for these units to be at their optimal performance before going to their new homes.  Every item you acquire from us undergoes a meticulous inspection process conducted by our team of enthusiasts, studio engineers, and live performers. With full-time technicians on staff, rest assured that each piece is thoroughly examined and tested before being professionally packed.

All orders placed by 2 pm are processed the same day. This ensures that your gear is swiftly prepared for shipment, guaranteeing prompt delivery in the condition promised. Once your order is in transit, automatic tracking information is provided, allowing you to monitor its journey from our shop to your doorstep with ease.

The units/items you see in our pictures are precisely what you'll receive. Have questions? Feel free to ask before making a purchase. Additionally, we offer custom modifications, within reason, to many of the guitars and products we sell, ensuring they perfectly suit your unique requirements.

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