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warranty.

Using one speaker cabinet: With the amp OFF, plug in speaker a cabinet either 

Speaker Output jack.

Using two speaker cabinets: When using with two speaker cabinets, both must be the 
same impedance (i.e. two 8 ohm cabs), and the impedance selector should be set for 

half each cab's impedance. For example:

When using two 8 ohm cabs: Set the impedance selector should be set to 4 ohms.

When using two 16 ohm cabs: Set the impedance selector should be set to 8 ohms.

Using two 4 ohms cabs: This configuration is not supported.

Footswitch Jack:

¼” jack for the included 2-button footswitch. Use with TRS ¼” cable. 

Effects Loop (optional): 

The Ghost series effects loop is designed to work ideally with instrument level effects (i.e. 

effects pedals) and some line level equipment (i.e rack effects units) gear. In general, time-
based effects such as reverb and delay 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 heard more cleanly and clearly. For 

example, plugging a delay into the effects loop allows you to delay your distorted tone, giving 
a clear delay effect. Conversely, plugging a delay into the input of the amplifier would 

overdrive the delay, giving a murkier, washed-out delay sound. There is no correct way to use 
your effects, it's all a matter of preference. 

Note: The Return jack of the Effects Loop may also be used as a power amp input, and in 

conjunction with a separate preamp unit.

Tip: A volume pedal also works well in the effects loop, acting as an overall master volume, which 

can be extremely useful in a live setting, however a buffered pedal is preferred to prevent treble 

loss.

Send Jack: Connect to the input of your effects via ¼” shielded instrument cable.

Return Jack: Connect to the output of your effects via ¼” shielded instrument cable.

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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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