These numerous and costly component upgrades elevate the LS28SE’s performance to an entirely new level. The improved clarity, resolution, transient snap, sense of space, and a relaxed purity are instantly noticeable and will inspire extended listening sessions.
Since 1970, High Definition has been more than our trademark; it has been our guiding principle for all products. The Foundation Series continues this passion and philosophy, offering the listener stunning playback, great value, and unparalleled long-term support.
Technical Specifications
FREQUENCY RESPONSE: +0-3dB, 0.4Hz to 200kHz at rated output (Balanced, 200k ohms load)
THD+NOISE: Less than .007% at 2V RMS BAL output.
NOISE: Less than -100dBv at max volume (103).
DYNAMIC RANGE: 122dB (AES17).
CROSSTALK: -105dB
GAIN: Main output: 18.5dB balanced output. (12.5dB SE output.) Record output: 0dB (Processor input: 0dB balanced out).
INPUT IMPEDANCE: 100K ohms Balanced, 50K ohms SE. 8 Inputs – 4 balanced, 4 single-ended.
OUTPUT IMPEDANCE: 600 ohms Balanced, 300 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: 16V RMS BAL, 8V RMS SE.
RATED OUTPUTS: 2V RMS (1V RMS SE) into 200K ohm balanced load (maximum balanced output capability is 17V RMS at less than 0.5% THD at 1kHz).
CONTROLS: Rotary volume selector (103 steps) and rotary input selector. Push buttons: Power, Menu, Enter, Mono, Invert, Mute
POWER SUPPLIES: Electronically regulated low and high voltage supplies. Automatic 45 sec. warm-up/brown-out mute. Line regulation better than .01%.
TUBE COMPLEMENT: (4) 6H30P dual triode.
POWER REQUIREMENTS: 105-125VAC 60Hz (200-250VAC 50/60Hz) 130 watts maximum.
STANDBY: 2W
DIMENSIONS: Width: 19” (48 cm) Height: 6.5” (13.7 cm) Depth: 13.7” (34.8 cm)
Handles extend 1.6” (4 cm) forward of the front panel.
Weight: 16.0 lbs. (7.2 kg) Net; 24 lbs. (10.9 kg) Shipping.
