Realtime Processed DC Integrated Amplifier L-11

The Luxman L‑11 is a high‑end integrated amplifier from the company’s Laboratory Standard Series, introduced around 1978. It features Luxman’s “Realtime Processed DC” design philosophy, aimed at maintaining DC integrity throughout the signal path to minimize phase shift and achieve wide‑bandwidth, low‑distortion performance.

The L‑11 includes an advanced phono stage, a four‑position linear equalizer instead of conventional tone controls, and a dedicated mode for driving electrostatic loudspeakers. Its build quality, smooth control feel, and understated industrial design make it a sought‑after model among collectors and vintage audio enthusiasts.

For MC (moving coil) phono a plug-in transformer is required.

Key Technical Specifications

Power & Performance

• 100 W per channel into 8 Ω (20 Hz–20 kHz, ≤0.02% THD)
• 155 W per channel into 4 Ω (DIN)
• Frequency response:
  • High‑level inputs: 10 Hz–90 kHz
  • Phono: 20 Hz–20 kHz ±0.2 dB
• Total harmonic distortion: 0.015–0.02%
• Signal‑to‑noise ratio:
  • Phono: >92 dB
  • Line: >100 dB

Inputs & Outputs

• Phono 1 (MM)
• Phono 2 (MM / MC via optional transformer)
• AUX 1, AUX 2, Tuner, Tape 1, Tape 2
• Pre‑out / Main‑in (1.6 V)
• Two speaker zones (relay‑switched)
• Headphone output

Notable Features
Linear Frequency Equalizer
Instead of conventional bass/treble knobs, the L‑11 uses a four‑position linear equalizer offering two “up‑tilt” and two “down‑tilt” curves—an audiophile‑oriented approach to tonal shaping.

Additional Functions

• Subsonic (low) filter
• Low‑boost circuit
• Electrostatic speaker mode
• Dual tape monitor & dubbing
• Overcurrent & DC‑sensing speaker protection
• 4‑gang volume control

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