SCIENCE Street Sweeper MkII User Manual Download Page 12

Keep the amp away from moisture, and never put any beverages on top of the amplifier,
no matter how convenient it may seem!

Only change fuses with the amp unplugged from the outlet!

There are potentially lethal voltages present inside the amplifier. Do not open the 
amplifier chassis unless authorized and are a qualified technician.

Limited Lifetime Warranty

Science Amplifiers are warranted to be free from defects in workmanship for the lifetime of 

the original owner. Electronic components such as capacitors, resistors, transformers, jacks, 
and potentiometers are warranted for 3 years (not including tubes, see below). Any part 

determined defective by Science Amplification within the 3 year period shall be repaired or 
replaced by Science Amplification without charge for parts and labor provided the unit is 

returned and transportation costs prepaid. Science Amplification will pay return shipping 
costs to 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: operating the amp without a speaker connected (although the amp 
has some built-in protection against this), operating the amp into the wrong speaker 

load, improper tube installation, using the wrong value fuses, maladjustment of bias 
controls, etc. 

Accidental damage: Dropping the amp, spilling liquid inside, etc.

Acts of "God”: Natural disasters and other non-preventable/foreseeable events that 
damage the amplifier.

Tubes, unless within manufacture's warranty period of 90 days (replacements offered 
at manufacturer's discretion).

Any damage caused by authorized or unauthorized repair or modification that is not 
performed by Science Amplification.

For warranty service, please email 

[email protected]

 for return authorization. Amplifiers

must be sent back in the original packaging or equivalent packaging. The cost of return 

shipping to Science Amplification is to be prepaid by the owner. Science Amplification is not 

10

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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