Luxman B-1000f Monoblock Power Amplifier (1995)
A high-powered, fully balanced monoblock amplifier released by Luxman in November 1995, representing the brand’s flagship power amplification technology of the era.
Overview
The Luxman B-1000f is a monoblock power amplifier developed by Japanese manufacturer Luxman and released in November 1995. Designed as the top-of-the-line model in its category, it integrates Luxman’s accumulated engineering expertise with advanced circuit design and high-grade materials. Each unit delivers substantial power output and features a fully balanced configuration for improved signal integrity.
Specifications
| Continuous effective output (RMS) | 250W at 8Ω, 500W at 4Ω |
| Maximum output | 1,000W at 2Ω, 2,000W at 1Ω |
| Input sensitivity | 1V for 250W at 8Ω |
| Input impedance | Unbalanced: 50kΩ, Balanced: 100kΩ |
| Gain | 36dB |
| Damping factor | 480 at 8Ω |
| Total harmonic distortion | 0.04% (20Hz to 20kHz) |
| Frequency response | 20Hz - 20,000Hz +0, -0.1dB; 10Hz - 100,000Hz +0, -1.0dB |
| Signal-to-noise ratio (IHF-A) | 115dB |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 560W |
| Dimensions (W x H x D) | 467 x 233 x 482 mm |
| Weight | 43.5 kg |
| Inputs | Balanced and unbalanced |
| Outputs | Two speaker outputs per unit |
Design
The amplifier uses a fully balanced Complimentary Single Stagger Circuit (CSSC) topology combined with Luxman’s OD-β (Optimized Dual NFB) feedback system. It features an isolated power supply chassis housing an 800 VA EI transformer and four custom 22,000μF filter capacitors. The layout separates power components from the signal path, and the chassis employs a 5-point grounded FRP base with box-isolation structure for vibration control. Inputs include both balanced and unbalanced options, while speaker outputs include original banana terminals, large 3-way terminals, and a Speakon connector—first used in a domestic Japanese amplifier. High-purity 6N cables, copper-styrene capacitors, non-magnetic resistors, and copper bus bars are used throughout. The front panel includes a large power display meter and a solid aluminum panel with a special peer surface finish. A custom AC inlet with line phase sensor is included, and the unit can be remotely turned on/off when connected to a compatible control amplifier.
Context
Positioned as Luxman’s top-of-the-line monoblock power amplifier at release, the B-1000f represented the culmination of the company’s technological development in solid-state amplification.
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