LS26 Line Stage Preamplifier

The LS26 benefits from many enhancements passed down from the REF3, including new proprietary parts, special damping, and other design elements.

The LS26 is pure Class-A with zero feedback, the power supply is massive and fully regulated, frequency response extends to 160kHz, input headroom has been increased by 71%, and noise is vanishingly low, allowing the LS26 to be used in noise-sensitive applications. Gain is provided by two long-life 6H30 triodes, so maintenance costs are low. With its low output impedance, the LS26 will easily drive virtually any amplifier you would care to use.

Rear Panel View: LS26 Line Stage Preamplifier
FREQUENCY RESPONSE: +0-3dB, 0.2Hz to 160kHz at rated output (Balanced, 200k ohms load)
DISTORTION: Less than .01% at 2V RMS BAL output.
GAIN: Main Output : Selectable for each input: 24dB, 18dB, 12dB
Balanced output. (18dB, 12dB, 6dB SE ouput.)
Record output: 0dB (Processor input: 0dB balanced.)
INPUT IMPEDANCE: 120K ohms Balanced, 60K ohms SE . Inputs (8): Tuner, Phono, CD, Video, Aux 1, Aux 2, Monitor, Processor (XLR and RCA connectors).
OUTPUT IMPEDANCE: 700 ohms Balanced, 350 ohms SE Main (2). 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 Main, 1 Record (XLR and RCA connectors).
OUTPUT POLARITY: Non-inverting.
MAXIMUM INPUT: Low Gain: 48V RMS BAL, 24V RMS SE
Medium Gain: 24V RMS BAL, 12V RMS SE
High Gain: 12V RMS BAL, 6V RMS SE
RATED OUTPUTS: 2V RMS 1Hz to 100kHz into 200K ohm balanced load (maximum balanced output capability is 15V RMS at less than 0.5% THD at 1kHz)
CONTROLS: Rotary volume selector (104 steps) and rotary input selector.
Push buttons: Power, Monitor, BAL/SE, Proc, Mute. Also remote buttons: Display, Bal L, Bal R, Hours, Invert, Gain.
POWER SUPPLIES: Electronically-regulated low and high voltage supplies. Automatic 50 sec. warm-up/brown-out mute. Line regulation better than .01%.
NOISE: 1.3uV RMS residual IHF weighted balanced equivalent input noise with volume at 1 (100 dB below 2V RMS output).
TUBE COMPLEMENT: 2-6H30 dual triode. (Hybrid JFET/tube audio circuit, solid-state power supply).
POWER REQUIREMENTS: 105-130VAC 60Hz (210-260VAC 50/60Hz) 50 watts maximum.
DIMENSIONS: 19" (48 cm) W x 5.25"(13.4 cm) H (standard rack panel) x 12"(30.5 cm) D. Handles extend 1.50" (3.8 cm) forward of the front panel.
WEIGHT: 16.5 lbs. (7.5 kg) Net; 26 lbs. (11.8 kg) Shipping.