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AmplifiersPre-AmplifiersDiscontinued
Estimated price (community-sourced)
$16,200original retail
Original retail — discontinued, no used price recorded yet
About the L7000
The L-7000 is a remote-controlled, transformer-coupled line-stage preamplifier with a single gain stage and a true dual-mono design. Its circuit uses E810F tubes for gain, 300B tubes in the voltage-regulation circuit, and 5654 tubes as voltage-error detectors. It provides balanced and unbalanced inputs and outputs, and uses a constant-impedance attenuator. Published specifications vary between versions or sources; the figures below reflect the commonly listed L-7000 specifications.
Specifications
Type: Line-stage preamplifier; topology: single gain stage, transformer-coupled, true dual-mono; Inputs: 3 pairs RCA, 2 pairs XLR; Outputs: 1 pair RCA, 2 pairs XLR; Input impedance: 10 kΩ (RCA and XLR); Voltage gain: +20 dB; Frequency response: 20 Hz–20 kHz (flat), 16 Hz–50 kHz (-3 dB); THD (1 kHz): 0.06% at 0.3 V output, 0.15% at 1.0 V output; Signal-to-noise ratio: -90 dB (CCIR, 1 kHz); Maximum output: 15 V RMS; Output impedance: 150 Ω constant; Tubes: 2 × E810F, 2 × 300B, 2 × 5654; Power consumption: 30 W; Dimensions: 430 × 410 × 173 mm (W × D × H); Weight: 18 kg