Mark Levinson No. 53 manual No 53 Reference Power Amplifier

No 53 Reference Power Amplifier

Input and output connectors	One balanced XLR input
	One unbalanced RCA input
	Two pairs of “Hurricane” loudspeaker output binding
	posts with banana-plug sockets (banana-plug socket
	not available for some models)
Control connectors	Two Link2 ports (one input and one output)
	One Ethernet port
	One 3.5mm mono (tip/sleeve) mini plug trigger
	input, 3-12Vdc
	One 3.5mm mono (tip/sleeve) mini plug trigger
	output, 3-12Vdc
	3-Pin IEC standard power connector
Rated output power	500W @ 8Ω, 1000W @ 4Ω

This side view shows the four different compartments of the amplifier: the power supply section at the bottom, the middle section with the four amplifiers, the top section with the control circuitry (modulator), and a separate enclosed box (top left) that houses the analog input board.

	Power ratings are measured as RMS power from
	20Hz to 20kHz with no more than 0.1% THD
Frequency response	Within +0.1dB from 10Hz to 20kHz
Signal-to-noise ratio	–85dB, reference level: 2.83 Vrms (1W @ 8Ω)
Input impedance	100 kΩ (balanced); 50 kΩ (unbalanced)
Voltage gain	26.8dB
Input sensitivity	2.89V for maximum rated output power
Power requirements	100V~, 120V~, 230V~, 640W, factory-set
	for destination country
Dimensions	Height: 20-3/8" (530mm)
	Width: 8-7/16" (214mm)
	Depth: 20-3/8" (518mm)
Weight	Net weight: 135 lb (61.3kg)
	Shipping weight: 165 lb (75kg)
Operating environment	Operating temperature: 0º to 35ºC (32º to 95ºF)
	Storage temperature: –30º to 75ºC (–22º to 167ºF)
	Relative humidity: 95% maximum without condensation