Luxman CL-1000 Control Amplifier

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Successor to the C-1000, the CL-1000 pairs beautifully with the MQ-300 vacuum tube stereo power amplifier. It embodies the best with a major step forward in sonic clarity: the transformer-assisted volume control we call LECUTA (Luxman Electronically Controlled Ultimate Transformer Attenuator). In addition, super permalloy core output transformers contribute to a vivid sound stage.

The heart of any preamp is the volume control. This key circuit element can cause left/right channel imbalances and introduce subtle but tangible distortions at low volume. The front panel volume triggers 34 relays located outside the signal path. The relays activate 34 taps on matching left and right transformers. These taps adjust the volume in carefully calibrated steps. Because transformer cores can influence sound quality, we selected FINEMET® core material. This has a unique nanocrystal structure for high saturation flux density, high relative permeability and low core loss.

The front panel uses the latest precision machining to superpose three thick aluminum layers into one massive, anti-resonant assembly. The aluminum provides a graceful counterpoint to the cabinet, covered in natural walnut with a rosewood gloss finish.

External vibration is the enemy of vacuum tubes. Engineers built a rigid box chassis reinforced by internal partitions. Brackets which hold circuit boards are isolated from the main chassis by special rubber dampers.

The RCA input/output terminals consist of an alloy that combines the conductivity of copper with the durability of brass. We also matched the massive, anti-resonant chassis to iron isolator feet. These diffuse shelf-borne vibration.

LUXMAN adopted two-stage P-K NF amplification. The balanced inputs incorporate super permalloy core transformers. The attenuator driver amplifier achieves 6 dB of gain thanks to a JJ Electronic E88CC dual triode vacuum tube. We selected the E88CC for superb reliability, extremely low noise, attractive dynamics and a densely detailed midrange. After LECUTA volume adjustment, the output stage incorporates a second E88CC and independent left/right super permalloy output transformers.

The CL-1000 accommodates both MM and MC cartridges with an audiophile phono preamplifier. Six-position switches on the rear panel enable you to optimize impedance and capacitance.

We chose independent left and right output transformers with high-permeability super permalloy cores. And we applied the same grade of transformers to the independent left and right balanced inputs.

We incorporated a highly stable, extremely potent power supply. A large power transformer plus independent left and right channel filter capacitors provide immediate power. You get instant dynamic response, excellent left/right separation and high reliability.

The CL-1000 oscillates and demagnetizes the transformer cores every time you turn the power on. For an even higher degree of sonic purity, you can perform manual demagnetization using the Articulator switch.