Luxman B1000f

Monoblock Amplifier

".. As I think back about all of the amps I've heard, or at least the ones that come easily to mind, I can remember none that seemingly incorporates the strengths of them all better than the Luxman B-1000f. It has a fundamentally neutral signature, standard-setting bass depth and linearity, and doesn’t display obvious colorations that will cause you to revoice your system to overcome them. There's no solid-state leanness or tubelike warmth, no bass bloat that gives the illusion of power, no zingy treble. There's just an open window on the intrinsic sound of the recording, a sonic character that passes on the signal fed to it with great detail and dynamic expression.  Marc Mickelson, SoundStage..."

Fifteen years in development; The Luxman Board approved completion of the B-1000 two years before Luxman's 80'th Anniversay. The B-1000f flagship monoblocks are a showcase of what Luxman engineering has achieved over the past eighty years. Equipped with ODNF version 2.3; less noise, more music. Truly state of the art in High End Audio.

In order to bring out the full potential of the loudspeakers, an amplifier must be able to cope with drastically fluctuating speaker impedance conditions. This can only be achieved by ensuring constant drive voltage at all times. In other words, the output impedance of the amplifier must be kept very low. This also makes it possible to absorb the counter-electromotive force generated by the voice coil, thereby eliminating a major source of intermodulation distortion. With an amplifier that is stable into a 1 ohm load; no matter what impedance the speaker drops to, nor need to worry about your speaker's phase shift - these amplifers are unflappable.

With continuous output power of 2,000 watts into 1Ω - easily drives the most difficult speaker loads.

Only Distortion Negative Feedback (ODNF)

Luxman's patented ODNF circuitry has redefined the relationship between music signals and noise and does not use phase compensation or NFB loops in the music signal path, instead it accurately isolates distortion components to cancel them.  

Luxman holds many patents for audio engineering, amongst them is the application of  Global Negative Feedback to the output stage (1955), which while widely used throughout the audio industry, they no longer use themselves.
 
Luxman nowadays uses a distortion reduction circuit called Only Distortion Negative Feedback (ODNF). This system works by isolating noise & distortion at the output from the music signal and sparingly applying negative feedback to suppress them. Conventional negative feedback systems can have an adverse effect on the music, introducing phase distortion. "The circuit features such an ultra-wide range, ultra- high slew rate and ultra low distortion that it does not use phase compensation for the music signal amplifying circuits." This new technology also ensures that need for a DC servo circuit is alleviated, again improving sound quality.

• Rated Output: 250W /8Ω, 500W /4Ω,
• Peak Power:  1,0000W /2Ω, 2,0000W 1Ω
• Input Sensitivity/ Impedance:  1V / 51KΩ RCA, 67KΩ  XLR
• Output Impedance: 1V / 210Ω, maximum 4.5V RCA
• Harmonic Distortion: 0.0007% (1KHz) Balanced
• Frequency Response: DC – 150KHz (+0, -3 dB)
• Nominal Voltage Gain:  32 dB @ 8Ω
• Signal-to-Noise Ratio:   118dB (1KHz {IHF-A}) XLR
• Power Consumption: 439W (rated power) 232W (idle), 0.7W (stand-by)
• Dimensions: 16.9 (W) x 11.6 (H) x 23.3” (D)
• Weight:  141 lbs. 240 lbs (shipping) each