Specifications Click here to view product brochure Click here to view owner’s manual Click here to view photo gallery Overview Growing in experience is a key attribute in the life of a successful craftsman. Past successes serve as a platform for future designs. The original Belles 150A Reference Stereo amplifier, introduced in 2003, was a significant step forward in state-of-the-art amplifier design. Building upon that successful platform, the new Belles 150A Reference Stereo Power Amplifier Version 2 (V2) offers improved performance at a price that is lower than the original. The new Belles 150A Reference V2 has improved musicality, lower noise, and a high dampening factor, which gives the unit a greater ability to drive difficult speaker loads. The 150A Reference amplifier V2 circuit consists of 3 stages: • an input stage with matched dual J-FETS/Bi-polars in a cascaded differential pair • a voltage gain stage using bipolar transistors • a final stage using a source follower with 8 power mosfet, class B biased All the circuitry for the amplifier is located on a single printed circuit board; while the power transistors are located separately on the unit’s heat sinks. Isolating the circuit from the power transistors to eliminate the: - Effects of mechanical vibrations on the output signal - Susceptibility to electro-magnetic interference for lower noise At 125 watts per channel into 8 ohms, the Belles 150A Reference Power Amplifier V2 is a worthy successor to the original Belles 150A Reference. Features • Dual-mono design topology. • Each channel an integrated circuit assembly • Gold-plated oxygen free copper binding posts and wire • Gold-plated input connectors accommodate balanced and unbalanced signals • 1000 VA toroidal power transformer, to eliminate stray magnetic fields • A pair can be used as mono-block units • Uses polypropylene capacitors • All power resistors are non-inductive ceramic • 1% metal film resistors used throughout • 3 stages of amplification • Negative feedback circuit stabilizes gain, reduces distortion, noise and output impedance • Uses a trimmed DC servo amplifier to maintain DC stability and speaker offset voltage. • Available with either a silver or black anodized front panel A pair of 150A Reference amplifiers V2 have exceptional performance and power at 500 Watts per channel into 8 ohms! brochure__150a_ref_ampv2.htmlmanual__150_reference.htmlGallery/Gallery.htmlshapeimage_1_link_0shapeimage_1_link_1shapeimage_1_link_2


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125 watts X 2 into 8 ohms  (500 watts mono-block configuration)
250 watts X 2 into 4 ohms


0.2 to 100,000 Hz


Less than 0.1%  at rated power


Over 1,000


Over 30 amperes


1.4 volts for rated power


100,000 ohms


>100 dB


21 voltage ratio or 26.44 dB


Unbalanced only (single ended)


17" W x 5.25" H x 13" D


48 lbs


120 VAC, 8.0A fuse (240 VAC optional)


5 years

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