SMc Audio SM-500SM-500 manual Rack Mounting, Tube Replacement, Specifications

10 Rack Mounting

The SM-500 requires two full rack spaces (3 1/2") and should be mounted at the bottom of the rack case. If mounted in any other rack space, additional support should be installed below the SM-500 to prevent continuous flexing of the amplifier's chassis which, over time, can damage the amplifier and void warranty coverage.

Please routinely check the mounting and chassis screws which can vibrate loose due to transportation and use. We recommend that at least once a month that the SM-500 be removed from the rack case and all outside screws be tightened and all connections in your rack case be checked to preserve the beauty and reliability of your equipment.

Tube Replacement

One 12AX7 dual triode vacuum tube (valve) is at the heart of your SM-500 pre-amplifier. Typically a 12AX7 tube will last several years, but heavy use and frequent transportation can reduce tube life span to less than a year.

When to replace the preamp tube: Sometimes, tubes become noisy or “microphonic” (sounds like glass chimes during certain notes) as they wear out, but other times, tubes will fail without warning. If your amplifier stops working and other possible causes have been eliminated (fuses, cords, etc.), have an authorized service center inspect your amplifier tube.

Specifications

PART NUMBERS		4400300010 (120V, 60Hz) USA	4400303010 (240V, 50Hz) AUS
		4400304010 (230V, 50Hz) UK	4400306010 (230V, 50Hz) EUR
		4400307010 (100V, 50Hz) JPN
POWER REQUIREMENT		840W
POWER AMP	MINIMUM IMPEDANCE:	4Ω
	SENSITIVITY:	1.67V RMS, 100Hz @ Mono Return
	POWER OUTPUT:	500W @ 4Ω (Bridge Mode);	250W @ 4Ω per channel (Stereo Mode)
		400W @ 8Ω (Bridge Mode);	150W @ 8Ω per channel (Stereo Mode)
PRE AMP	INPUT IMPEDANCE:	800kΩ (Passive/Active);	60kΩ (Active)
SENSITIVITY AT FULL POWER:		22mV (Passive/Active);	87mV (Active)
TONE CONTROLS	BASS:	±15dB @ 80Hz
	TREBLE:	±15dB @ 2kHz
	VARIABLE GRAPHIC EQ:	±15dB @ Frequency knob setting
	TRANSPARENCY:	±15dB @ 5kHz
EFFECTS LOOP	SEND IMPEDANCE:	100Ω
	RETURN IMPEDANCE:	27kΩ
BALANCED LINE OUT	SEND IMPEDANCE:	1.5kΩ
MAIN FUSES	110V-120V MODELS:	T8A, 250V
	230V-240V MODELS:	T4A, 250V
SPEAKER FUSES		F8A, 250V
DIMENSIONS	HEIGHT:	3.5 in (8.9 cm)
	WIDTH:	19 in (48.3 cm)
	DEPTH:	13.75 in (34.9 cm)
WEIGHT		25 lb (11.25 kg)

Product specifications are subject to change without notice.

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