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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.
One 12AX7 dual triode vacuum tube (valve)
is at the heart of your SM-500 pre-amplifier.
Typically a 12AX7 tube
years, but heavy use and frequent
transportation can reduce tube life span to
less than a year.
PART NUMBERS
POWER REQUIREMENT
POWER AMP
MINIMUM IMPEDANCE: 4Ω
PRE AMP
INPUT IMPEDANCE: 800kΩ (Passive/Active);
SENSITIVITY AT FULL POWER: 22mV (Passive/Active);
TONE CONTROLS
VARIABLE GRAPHIC EQ: ±15dB @ Frequency knob setting
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
DIMENSIONS
WEIGHT
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will last several
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4400300010 (120V, 60Hz) USA
4400304010 (230V, 50Hz) UK
4400307010 (100V, 50Hz) JPN
840W
SENSITIVITY: 1.67V RMS, 100Hz @ Mono Return
POWER OUTPUT: 500W @ 4Ω (Bridge Mode);
400W @ 8Ω (Bridge Mode);
BASS: ±15dB @ 80Hz
TREBLE: ±15dB @ 2kHz
TRANSPARENCY: ±15dB @ 5kHz
F8A, 250V
HEIGHT: 3.5 in (8.9 cm)
WIDTH: 19 in (48.3 cm)
DEPTH: 13.75 in (34.9 cm)
25 lb (11.25 kg)
Product specifications are subject to change without notice.
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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.
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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.
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4400303010 (240V, 50Hz) AUS
4400306010 (230V, 50Hz) EUR
250W @ 4Ω per channel (Stereo Mode)
150W @ 8Ω per channel (Stereo Mode)
60kΩ (Active)
87mV (Active)
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