SMc Audio SM-500SM-500 manual SM 500 Bass Amplifier, Front Panel

6 SM - 500 Bass Amplifier

Your new SM-500 Professional Bass Amplifier offers the performance, power and SWR® tone required by 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® Aural Enhancer tone shaping

•4-band Variable Graphic EQ, plus traditional 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 Your Future™ —

Front Panel

A. INPUTS - Plug into either input jack using a shielded instrument cable. Passive/Active (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 the signal level of the 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

Preamp Clip barely flickers at your instrument’s

peak output levels. Preamp clipping is not 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 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.)

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