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Color I: Adjust the tonal characteristics of Reverb I. When turned clock-wise the tone of the 

reverberation will become brighter with a longer 'tail'.

Level II: Adjusts the overall amount of reverberation for Reverb II.

Color II: Adjusts the tonal characteristics of Reverb II. When turned clock-wise the tone of the
reverberation will become brighter with a longer 'tail'.

Loudness: Adjusts the overall volume of the amplifier.

OFF/STBY(Standby)/ON switch: 3-Way switch: down is OFF, middle is Standby, and up is ON. 

About Standby: Standby mode mutes the sound and allows the tubes to heat up before 

applying high voltage to amp when turned ON. Leave in Standby for 30 seconds to a 1 minute 
before switching ON. Standby can also be used to mute the amplifier while leaving the tubes 

warm for short breaks. For long breaks it is best to turn the amplifier completely off.

To turn OFF, follow the same turn-on procedure – but in reverse order – allowing the amp to 
idle in Standby mode for about 30 seconds before powering down. While it is perfectly okay to

turn the amp OFF immediately, idling in standby before powering down lets the filter 
capacitors inside the amp fully discharge. If turned off immediately, there will still be some 

sound as the filter caps continue to discharge, which may be annoying.

Note: Amps fitted with the Ghost Effects Loop will experience a short delay when switching from 

Standby to ON. This is normal.

Indicator lamp: Attractive red neon light to indicate the amp is ON.

Rear Panel

WARNING: Use with grounded power outlet only! Discard power cord immediately if ground

pin is damaged/broken. The ground connection is for your safety in case of a fault condition!

120 VAC power input: Plug in the included standard IEC power cord here. For use with120 VAC 

only unless otherwise specified. Canadians, you are good to go too!

Fuses

WARNING: Only check/change fuses with amplifier unplugged from the outlet!

Your amp is fitted with fuses for safety and to protect the amplifier’s most expensive parts. 

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Summary of Contents for Street Sweeper MkII

Page 1: ......

Page 2: ...Contents Intro 1 Front Panel 1 Rear Panel 2 Tube Life Biasing 5 Safety 9 Limited Lifetime Warranty 10 Care and Maintenance 1 1 Tube Bias Diagram 1 1...

Page 3: ...ble Adds treble frequencies when turned clock wise and reduces treble when turned counter clockwise Middle Adds mid range frequencies when turned clock wise and reduces mid range when turned counter c...

Page 4: ...re but in reverse order allowing the amp to idle in Standby mode for about 30 seconds before powering down While it is perfectly okay to turn the amp OFF immediately idling in standby before powering...

Page 5: ...n pairs a nd if an output tube fuse blows power is cut off to one pair of the four KT88 output tubes even though only one is likely damaged This allows the amp continue to run safely on the remaining...

Page 6: ...y are best placed in the effects loop The effects loop is located after the preamp section of the amp where most of the overdrive distorted tone is generated This allows time based effects to be be he...

Page 7: ...depending on how hard the amp is played Sometimes they die gracefully sometimes abruptly causing a fuse to blow which in turn protects the amplifier from further damage It s sometimes possible to see...

Page 8: ...detailed information about your amp s biasing system and bias procedure in the following sections Bias Control Test Points Every Science Amplifier comes equipped with user accessible bias test points...

Page 9: ...ed for a sustained period the output tubes will likely fail Science Amplification is not responsible for output tube failure due to maladjustment of bias controls Please familiarize yourself with the...

Page 10: ...t to the tubes you are measuring 5 Plug the positive probe into the red test point behind the tube you are measuring 6 Take note of the reading on the meter 7 Remove the probe from the red point and r...

Page 11: ...inimum All the way counter clockwise 4 Follow steps 2 7 from the Measuring Adjusting Output Tube Bias instructions above 1 Turn the bias control clock wise with a small screwdriver until you reach the...

Page 12: ...o the original owner Any unauthorized repair modification or tampering voids this warranty The warranty excludes Normal wear and tear worn out tubes jacks cosmetic damage etc Misuse and abuse operatin...

Page 13: ...need cleaning use only a soft clean dry or damp cloth to wipe off smudges To clean tolex wipe with a damp cloth Periodically check the 4 mounting screws on the bottom to make sure they are tightened...

Page 14: ...12...

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