Belles 150A Ref V2 Power Amplifier

Building upon the successful platform that was the 150A reference amplifier. The new Version (V2) offers improved performance at a more advantageous price than its predecessor.

The new Belles 150A V2 has improved musicality, lower noise floor and a higher damping factor than the original model, which improved speaker driving ability and the ability to 'free' the music from the confines of the speaker boundaries.

Circuit construction using dual matched J-FETS/Bi-Polars in a cascaded differential pair. Bi polar voltage gain with a final stage using source follower with 8 power mosfets in class 'B'

The V2 is one of those rare products that meld art and science in a way that grips hearts and minds with soul stirring energy.

Belles reference 150A V2 utilizes a dual mono design topology. This gives the amplifier better isolation between channels. Soundstage imaging is improved, offering true soundstage width and depth. Instrument placement and layering are more accurate, revealing the depth and texture of each instrument or vocalist. Each channel shares a common 650VA toroidal transformer. By using a larger single transformer, rather than two smaller ones as in typical dual mono designs, stronger and cleaner bass is maintained.

Negative feedback is used to stabilize the gain and reduce distortion, noise and output impedance. DC stability and speaker offset voltage is properly regulated by using an accurately trimmed DC servo amplifier. This method introduces less coloration than using coupling capacitors.

The 150A V2 has been engineered to be among the most effective products on the market at dampening the back EMF from speakers. The results are heard as tightly controlled bass that has detail, texture, improved depth and separation.

The technology behind the Belles 150A V2 is impressive. Even more impressive, however, is the sound. Listening to the V2 has been described as a memorable experience; you feel as though you are part of the musical performance.

Belles 150 ref review Hifi News March 2008

Features

• Dual-mono design topology
• Each channel an integrated circuit assembly
• Gold-plated oxygen free copper binding posts and wire
• Gold-plated input connectors for balanced and unbalanced signals
• A pair can be used as monobloc units
• Uses polypropylene capacitors
• All power resistors are non-inductive ceramic
• 1% metal film resistors used throughout
• 3 stages of amplification
• (-ve) feedback stabilizes gain, reduces distortion, noise & output impedance
• Uses a trimmed DC servo amplifier to maintain stability and speaker voltage
• Available with either a silver or black anodized front panel

Specifications

• Power 125 watts per channel at 8 ohms
• 250 watts per channel at 4 ohms
• 500 Watts per channel 8 ohms, monobloc configuration
• Distortion Rated THD and IM less than 0.1% rated power
• Damping Factor over 1000
• Peak Current over 30 amperes
• Input Sensitivity 1.40 volts of rated power
• Input Impedance 100,000 ohms
• Hum and Noise over 100 dB A weighted
• Crosstalk over 60 dB
• Frequency Response 0.2 to 100,000 Hz
• Dimensions 432mm W x 133mm H x 330mm D
• Shipping Weight 22 Kg's
• Power Rating 240 VAC @ 50hz

Please enquire for actual lead time.