REF FOUR
€749,00
The B2 Audio REF FOUR is a premium 4‑channel Class AB amplifier built for listeners who demand absolute clarity and control. Its high‑current design, oversized power supply, and low‑distortion circuitry deliver exceptional detail and dynamic accuracy, while components like Sanken output devices, Rubycon capacitors, and ON‑Semi op‑amps ensure stability, musicality, and long‑term reliability. Perfect for refined SQ builds that require clean power with a truly reference‑grade sound signature.
REF FOUR
The B2 Audio REF FOUR elevates sound quality with engineering normally reserved for the select few. Its Sanken output stage delivers effortless current delivery and superior linearity, giving your front stage tighter control, richer dynamics, and cleaner transients. Precision‑tuned ON‑Semi low‑noise op‑amps preserve micro‑detail and imaging, while the oversized dual toroidal power supply and Rubycon capacitors delivers dynamic performance at any musical reproduction ..
Expand Your Horizon
The Celebration of pure analog refinement, the REF FOUR is built around a true Class AB topology that delivers the warmth, depth, and effortless musicality a high‑bias analog design can achieve. The dual 2‑channel configuration offers the flexibility and authority of two independent stereo amplifiers in a single chassis, allowing front‑stage components to breathe with unmatched separation, control, and tonal precision.
The 24 dB/octave configurable crossovers add refinement to the amplifier’s response, and the 10× multiplier allows you to run midranges and tweeters without relying on passive crossovers.
As a Class AB amplifier, The Twelve Hundred refers to its rated power output—an output our test lab exceeded. Keep in mind that analog amplifiers naturally generate heat. The built‑in fan, which can be switched off entirely, helps dissipate some of it, but the wide heatsink design handles the majority of the thermal management.
| Frequency Response: | Signal to Noise Ratio: | Input Sensitivity: | Crossover Slope: | Low Pass Crossover: |
|---|---|---|---|---|
| 15 Hz ~ 25 KHz | >90 dB | 6 V ~ 0.3 V | 24 dB / Oct | 40 Hz ~ 400 Hz |
| High Pass Crossover: | Phase: | Damping Factor: | Power Terminal gauge: | Fuse Rating: |
| 400 Hz ~ 4 KHz | ~ | >300 | 0 GA | 150 A |
| Operational voltage: | Dimensions: | Power @ 4 Ω 14.4v: | Power @ 2 Ω 14.4v: | Bridged Power @ 4 Ω 14.4v: |
| 9 V ~ 16 V | 18.54" x 6.3" x 2.52" 471 x 160 x 64 MM | 4 x 200 w | 4 x 300 w | 2 x 600 w |
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