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SWR MO’ BASS • INTRODUCTION

Congratulations on your purchase of the SWR Mo' Bass!  You now own one of the most unique products in the history of
musical instrument amplification.

Here at SWR we share your spirit of tonal exploration and willingness to experiment in pursuit of the ultimate goal: finding
equipment that not only does the job for you as a musician, but actually enhances your overall musical experience and con-
tributes to your creative process. The purpose of this Owner's Manual is to help guide you through the process of becoming
familiar with the many features and functions of the Mo' Bass. But before we get into turning knobs, we'd like you to know a
little bit about how the concept of the Mo' Bass came into existence.

In July of 1999, William Morris West III, an engineer/designer of custom-made audio gear for many studio musicians based
in the Nashville area, contacted SWR. He had a vision of a multi-effects unit made specifically for bass guitar, and since
SWR had a reputation in the industry as a manufacturer of top-quality bass guitar amplifiers and speaker cabinets, he saw
an opportunity for both him and the company to work together on bringing his idea to fruition. An appointment was made for
us to demo his working prototype. We wondered just how good it could be. A multi-effects unit tailored for bass?

Well, when "Mo" West showed up and did his demo, we were floored. The effects were all studio-quality ANALOG sounds.
The Tube Overdrive was not of this earth. The Octave Effect (he called it a "SubWave") tracked notes in registers so low it
seemed impossible. The EQ circuit was a thing of beauty, and the Chorus simply sang. By the time we heard the Synth
pumping out sounds straight off of Stevie Wonder's "Songs In The Key Of Life" album, we all knew that the project was a go.
We called it the "Mo' Bass."  The name stuck.

But then another vision came to mind. What if we could combine the best of the Mo' Bass with the best of SWR?  What if
we made the ultimate bass head - the famous SWR preamp with the patented Aural Enhancer circuitry, the Mo' Bass effects,
and a stereo power amp capable of delivering 400 watts per side?  Marrying the circuitry of SWR's founder and designer -
the legendary Steve W. Rabe - with the circuitry of the Mo' Bass would not be an easy chore. But as SWR President/CEO
Daryl Jamison had been saying around the factory for months, "Go big or stay home!"  We settled in for the long haul.

The development cycle of the Mo' Bass lasted an entire year. During that time we slaved over every detail possible. Each
individual effect was tweaked until it was as close to perfect as we could get it. Signal routing was a huge issue as we
worked to find the best ways to send clean and dirty signals to the 1/4" outputs, the XLR outputs, the speaker outputs, the
headphone outputs, you name it. Levels were checked, matched, rechecked and rematched again. An extraordinary effort
was made for the Mo' Bass to look like nothing ever seen before, hence the design of the curved, brushed aluminum front
panel. We wanted it to look like it sounds - awesome!

We ended up with the best of both worlds. Now you own an amplifier that can be as simple or complex as you need it to be.
Run it totally clean into one speaker cabinet for classic SWR sound. Run it into two cabinets and use the chorus. Blast it
into a Megoliath 8x10 with the Overdrive on '10' (or '11' if you're Derek Smalls). Use it in the studio with everything on at
once for sounds never before recorded. Send one signal to a mixing board. Send two. Send three!  Split your clean and
dirty signals using the Dual Mode feature. Combine effects. Switch back and forth. Experiment to your heart's content.

But please read the manual first, thoroughly and completely, so that you can realize the practically limitless potential of the
SWR Mo' Bass.

This way we can help you find your voice, your vision, your sound. And it's our privilege as a company to be there with you
along for the ride.

Bryan Beller
Product Development Manager
SWR Sound Corporation

Note: Please take a moment to verify that the following items were included in your SWR Mo’ Bass packaging: AC Cable,
Owner's Manual, Speakon-to-Speakon Speaker Cable, SWR Catalog.

B

Summary of Contents for Mo' Bass

Page 1: ...MO BASS OWNER S MANUAL SWR SCOTTSDALE AZ USA...

Page 2: ...uctions Frequently Asked Questions Signal Path Diagram Warranty Information Mode Diagrams Suggested Settings SWR MO BASS OWNER S MANUAL TABLE OF CONTENTS A B C D 1 2 13 20 20 F1 F2 F2 F3 MD1 MD6 SWR 8...

Page 3: ...or pinched by items placed upon them paying particular attention to cords at plugs and the point where they exit the product K Lightning For added protection of this product during a lightning storm...

Page 4: ...the famous SWR preamp with the patented Aural Enhancer circuitry the Mo Bass effects and a stereo power amp capable of delivering 400 watts per side Marrying the circuitry of SWR s founder and design...

Page 5: ...cts Blend Controls Dual Mode Switch with LED indicator Left and Right Master Volume Controls Illuminated Neon Power On Off Switch Stereo Headphones Jack Screwholes for Rack Mounting on chassis in each...

Page 6: ...Ohms minimum load 2 Ohms Frequency Response Power Amplifier 3 dB 10Hz to 40kHz Sensitivity full output under clipping 8 ohm load 100 Hz Passive Input Jack 42 millivolts Active Input Jack 84 millivolts...

Page 7: ...en do the same for the right side The Left and Right Master Volume controls should correlate to the cabinets on each side If the cabinets are the same impedance the same amount of power will be sent t...

Page 8: ...xer for two instruments but no harm will come from having two instruments plugged in at once Please read below for more details A Word About Gain Stages One of the most important concepts to keep in m...

Page 9: ...els of all of the effects on the Mo Bass Note Even though the Preamp Clip LED turning red indicates that at some point the preamplifier is clipping no harm is being done to your amplifier However clip...

Page 10: ...t or boost is found 3 Adjust the Midrange Level Control to the desired amount of boost or cut Some hints from the pros If you need to cut through the band a little more try boosting 200 to 400 Hz If y...

Page 11: ...e details SubWave The Mo Bass SubWave is a lightning quick sub octave wave engine In plain terms it hears the note you play and immediately generates a signal one octave below it You may have heard th...

Page 12: ...ol The Envelope Control is a signal processing device in the Bassynth that controls amplitude over a certain time frame In not so technical terms it gives the sound its shape The Envelope Control tell...

Page 13: ...ll be affected by the Filter Resonance and Envelope controls It should be noted that when the SubWave effect is activated the raw sub waveform is routed to the Bassynth regardless of where the SubWave...

Page 14: ...Mo EQ Midrange Control The band pass filter on this EQ control is set at 1 5 kHz Starting from mid position flat turning the Mo EQ Midrange Control counter clockwise cuts the upper mids at 1 5 kHz wh...

Page 15: ...the Depth very low You can get a fattening effect without sounding like a chorus if you set the Depth at 10 and the Rate at 0 For something really weird turn both controls all the way up and look to...

Page 16: ...illuminate Try playing again There should be more clean bass present than before Turn the Right Master Volume Control all the way counter clockwise to the minimum position You should now hear only the...

Page 17: ...who want to take tweaking to the ultimate level we ve included a Stereo External Effects Loop complete with Left and Right External Effects EFX Blend Controls To avoid confusion we refer to this loop...

Page 18: ...Single Channel Mode or Dual Mode for the preamp effects or Stereo or Bridged Mono mode for the power amp both controls are always independently active This is your last chance in the signal path to ad...

Page 19: ...ing including the Preamp EQ at all times and Mo Bass effects when engaged Mo Bass Out This signal sees Preamp EQ at all times and Mo Bass effects when engaged BALANCED OUTS Direct Out This output diff...

Page 20: ...other simply set the Line Direct switch to Line and use the Direct Out for the clean side and the Mo Bass Out for the wet side Balanced Outs In Dual Mode This section is simple in Dual Mode nothing ch...

Page 21: ...rols section of the manual the Mo Bass is equipped with a TRUE STEREO External Effects Loop You can now use an external effects unit to affect the channel s of your choosing clean left or wet right in...

Page 22: ...Speaker Outs section for more details Internal Effects EFX Bypass Jack This is the input jack for the Internal Effects Bypass footswitch which can be used to bypass any internal Mo Bass effect curren...

Page 23: ...amps every speaker cabinet has a pre determined impedance rating measured in ohms In most cases this rating is either 4 or 8 ohms though there may still be some old 2 ohm creakers out there The highe...

Page 24: ...s compared to what the Mo Bass can deliver at that impedance Those ratings are as follows Bridged Mono Mode 900 Watts 4 Ohms minimum 650 Watts 8 Ohms 440 Watts 16 Ohms Stereo Mode per side 600 watts 2...

Page 25: ...ard 1 4 jack If using the Speakon output jack we highly recommend the use of a Speakon to Speakon speaker cable one of which is supplied with your unit All SWR Professional Line speaker cabinets come...

Page 26: ...e sure all vents are unobstructed when installing your Mo Bass in a rack case This will allow for cool air to come in and hot air to escape Viewing the Mo Bass from the front the right side is the air...

Page 27: ...recognized by turning your amplifier on and letting it sit idle without speakers plugged in and without playing it If your unit starts getting hot under these conditions it may be over biased This si...

Page 28: ...the SubWave and Bassynth at the same time but I can t get any Overdrive signal at all What s wrong A Make sure the Mix controls on either the SubWave or Bassynth aren t set all the way clockwise if so...

Page 29: ...using the MIDI Out function you can send Presets 1 4 and a bypass to work with the first five presets on your MIDI device and then you can program the levels on your MIDI device Q When I run in Dual...

Page 30: ...nd you may also have other rights which vary from state to state For a complete list of Authorized SWR Service Centers please visit www swrsound com SWR SWR 8860 E Chaparral Rd Suite 100 Sottsdale AZ...

Page 31: ...NT END Single Channel Mode POWER AMP Bridged Mono Mode SPEAKER CABINETS One SIGNALS TO CONSOLE One MD1 BRIDGE MONO MODE STEREO MODE External Power Amp If desired Mixing Console Internal EFX Bypass Ped...

Page 32: ...END Single Channel Mode POWER AMP Stereo Mode SPEAKER CABINETS Two SIGNALS TO CONSOLE One MD2 BRIDGE MONO MODE STEREO MODE External Power Amp If desired Mixing Console Expression Pedal Speaker Cabinet...

Page 33: ...TS Two SIGNALS TO CONSOLE Two One always clean with preamp EQ One wet when effects engaged MD3 BRIDGE MONO MODE STEREO MODE External Power Amp If desired Mixing Console Volume Pedal Wet Speaker Cabine...

Page 34: ...e wet when effects engaged MD4 BRIDGE MONO MODE STEREO MODE External Power Amp If desired Mixing Console Speaker Cab 2 8 Ohm Speaker Cab 1 8 Ohm Internal EFX Bypass Pedal Please Note The minimum load...

Page 35: ...E One with external effects unit MD5 BRIDGE MONO MODE STEREO MODE External Power Amp If desired Mixing Console Speaker Cabinet Please Note The minimum load that the Mo Bass can drive in Bridge Mono Mo...

Page 36: ...GNALS TO CONSOLE Two with two external effects units MD6 BRIDGE MONO MODE STEREO MODE Effect Unit 1 Mixing Console Output Input Effect Unit 2 Output Input Wet with Right FX Loop Clean with Left FX Loo...

Page 37: ...THE DINOSAUR THE DINOSAUR II...

Page 38: ...IN A MINI MOOD MELLOW DRIVE...

Page 39: ...BOMB DROPPER COME TOGETHER...

Page 40: ...ALL SYSTEMS GO SWEET SLAP...

Page 41: ...WEATHER FORECAST 1 WEATHER FORECAST 2...

Page 42: ...SONGS IN THE KEY OF MO CHAMELEON...

Page 43: ...RAGE OVERDRIVE FOLLOW THE ENVELOPE...

Page 44: ...TOM SAWYER VOODOO PRINCESS...

Page 45: ...PHASE O MATIC THE ALIENS HAVE LANDED AND THEY RE ANGRY...

Page 46: ...MO BASS ARKESTRA CREATE YOUR OWN Note Pre Amp volume should be set just prior to activating the clip LED for this setting...

Page 47: ...o Control Four preset banks allow you to store any combination of Mo Bass effects and switch between those presets You can also add or subtract any effect from the currently selected preset group Mo C...

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