SWR SM-400 Vintage 400W Rackmount Bass Amp Head 1980s


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Here's a 1980s SWR SM-400 bass head in good working condition. This powerful head is loaded with tone-shaping features including a 4-band graphic EQ with sweepable frequencies on all four bands, tube preamp and solid state power amp, effects loop, stereo speaker outs, and lots more. It's been well loved and shows a healthy amount of cosmetic wear and tear throughout (see photos), but it functions as it should. Does not include speaker cable or other accessories, but please send us a message before checking out if you'd like to add anything to your order.

From the manual:

The SM-400 Bass Amplifier provides the power, performance, flexibility and portability needed by the professional bass musician for every style of playing and nearly every situation he/she will encounter.

To accomplish our goals, we had to use almost every imaginable type of electronic component available. This added up to an all TUBE preamp section, a limiter using Field Effect Transistors, tone and equalizer controls utilizing Integrated Circuits and two individual power amps employing discreet, solid state devices.

The power amplifiers in the SM-400 can be used individually to provide full bi-amp capabilities when used with the built-in adjustable electronic crossover or can function as stereo, 200 watt power units. If you need more power, the amps can be bridged for 400 Watts @ 8 ohms or 420 watts @ 4 ohms.

Front panel features include Hi and Low Gain input jacks, Gain and Master Volume controls, Integral Limiter and an exclusive feature we call an Aural Enhancer. Tonal flexibility is achieved with Bass and Treble controls and a 4 band

Variable Graphic Equalizer. The Crossover Frequency Control adjusts the crossover points of the electronic crossover and the Balance control adjusts the levels of the two power amps when used in the stereo mode.

The back panel features and XLR Balanced Out switchable for direct and line out, Crossover High and Low Frequency Output jacks, and Mono and Stereo Effects loops. A power amp assign switch selects stereo or bridge mode and for speaker outputs, there are two jacks each for left and right out or one banana jack for mono operation.

The SM-400 is rack mountable, taking up two rack spaces (3 1/2") by 11 3/4" deep. It is housed in an all aluminum chassis for light weight and lasting beauty and weighs just over 18 pounds. It is easily carried by the handles secured to the front panel.

* If you are placing an international order, please contact us prior to checkout to discuss shipping quotes.

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