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Your new SM-500 Professional Bass Amplifier offers the
performance, power and SWR
professional bassists for every style of playing:
• Twin power amps with two modes of operation
• •
Bridge (mono) mode—500 watts @ 4-ohms
• •
Stereo mode—250 watts (per side) @ 4-ohms
• Tube preamp fueled by a 12AX7 dual triode tube
• Independent inputs accommodate passive and active
bass guitars
• Variable Limiter control with a Limiter Active indicator
• World renowned SWR
®
A. INPUTS - Plug into either input jack using a
shielded
instrument
(normal sensitivity) provides the best sound with
most instruments.
Active (low sensitivity) provides: 1. Cleaner
response with high output instruments, such as
preamplified bass guitars or keyboards, 2. A
darker tone with passive bass guitars and 3. An
input for a second instrument.
B. GAIN
-
Adjusts
preamplifier. Equalization, tone and effect levels
all contribute to the preamp signal level therefore
Gain should be set after they are adjusted. (Gain
also controls the Effects Send {P} level.) Use the
Preamp Clip LED to find the Gain setting with the
maximum signal–to–noise ratio:
PREAMP CLIP LED - Illuminates when the
Gain setting is overdriving (clipping) the preamp.
The cleanest Gain setting is indicated when
S S
M M
- -
5 5
0 0
0 0
S S
M M
- -
5 5
0 0
0 0
®
tone required by
Aural Enhancer tone shaping
F F
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F F
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cable.
Passive/Active
the
signal
level
of
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B B
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s s
s s
A A
m m
p p
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B B
a a
s s
s s
A A
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• 4-band
Variable
Bass/Treble and Transparency tone controls
• Speaker mute switch
• Stereo/mono effects loop connections with Effects
Blend control
• Speakon
®
and 1/4" speaker output flexibility
• Balanced XLR output with Line and Direct feed-
through modes, plus variable XLR Pad and Ground Lift
Thank you for choosing SWR
— Amplify Y
— Amplify Y
o o
n n
t t
P P
a a
n n
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l l
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t t
P P
a a
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Preamp Clip barely flickers at your instrument's
peak output levels.
harmful to your amplifier (unlike power amp
clipping) therefore reduce Gain only if you hear
unwanted distortion that is indicated by the
Preamp Clip LED.
GAIN TIP: To overdrive the first tube stage of the
preamp, connect an external preamp inline
between your instrument and the Passive input.
For the best, pure-tube overdrive sound, boost
the
the external preamp output, then set Gain {B} so
the Preamp Clip LED does not flash at peak
playing levels. (The Preamp Clip LED does not
monitor the first preamp tube stage to allow you
to isolate the stages in this way.)
u n
n d
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c o
o m
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Graphic
EQ,
plus
our Futur
e
™
—
our Futur
e
™
—
Preamp clipping is not
traditional
®
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