Bryston 4B³ Power Amplifier - Black

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 legend 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.

Power Output Per Channel: 300 Watts into 8 Ω Load; 500 Watts into 4 Ω Load
Gain High: 29 dB, 28.28 V/V; Low: 23 dB, 14.14 V/V
Sensitivity: High: 1.00 V, 100 W; High: 1.73 V, 300 W; Low: 2.00 V, 100 W; Low: 3.46 V, 300 W (all into 8 Ω)
Input Impedance: Single Ended ≈ 30 kΩ; Balanced + ≈ 30 kΩ; Balanced – ≈ 6 kΩ
IMD: ≤ 0.005%, Typ. ≤ 0.002%
THD+N: 20 Hz – 20 kHz @ 300 W, 8 Ω ≤ 0.005%
Noise: SE: High: 29 dB < – 111 dB; SE: Low: 23 dB < – 116 dB; Bal: High: 29 dB < – 112 dB; Bal: Low: 23 dB < – 118 dB
Slew Rate: > 60 V / µS
Bandwidth: 0 – 3 dB < 1 Hz to > 100 kHz
Frequency Response: 0 ± 0.1 dB, 20 Hz – 20 kHz
Damping: 20 Hz, 8 Ω, > 500
Power Consumption: 300 W 8 Ω: 1000 W; Idle: ≤ 80 W; Standby: < 0.5 W
Dimensions: 430 (W) x 395 (D) x 63(H) mm
Weight: 19.1 kg

Turnaround

Orders will usually dispatched within 2 working days of receiving cleared payment.

Shipping Rates

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Carriers

We despatch the bulk of our UK mainland items on a 24 hour service.  Non-Mainland locations – Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer. Smaller items are delivered using Royal Mail 24 or special delivery. Larger items are delivered using a courier service such as UPS and occasionally by a Pallet service.

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