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Front Panel Functions 

 
 
 

 

 
1. 

Input Jack

- High impedance input to the amplifier.  Plug in your instrument here.

 

 
2. 

Treble Control

- Adjusts the high frequency response.  In the full counter-clockwise position, 

high frequencies are bypassed to ground.  In the full clockwise position, high frequencies are 
allowed to pass to the input gain stage. 
 
3.

 Middle Control

 

– Adjusts the mid-range response.  In the full counter-clockwise position, the 

tone will be somewhat “scooped” of mid-range response, emphasizing the highs and lows.  In the 
full clockwise position, mid-range frequencies are allowed to pass to the input gain stage. 
 
4. 

Bass Control

- Adjusts the bass response.  In the full counter-clockwise position, low 

frequencies are cut.  In addition, the response of the treble and mid-range controls is greatly 
reduced.  In the full clockwise position, low frequencies are allowed to pass to the next gain stage. 
 
5.

 Clean Gain

- Adjusts 

the overall gain of the amplifier.  Start with this control in the 12 o’clock         

position.  Keep in mind that the amount of gain set here determines the signal level feeding the 
lead    channel.  Low gain settings of this control will require higher lead gain settings for the same 
amount of overdrive. 

Bright Pull-

 Boosts the high frequency response.  This is most effective when the input 

gain is 

set at 12 o’clock or lower.  The effect is less dramatic as the input gain control is 

adjusted past the 12 o’clock position. 

 
6.

 Clean Master Volume-

 Adjusts the output level of the amplifier. Both the clean and overdrive 

output is controlled by this level. This level will also control how much signal is passed to any 
pedal that is inserted into the effects loop. 
 
7. 

Clean Reverb

 - The reverb return control mixes the reverb effect signal with the dry signal. At 

full counterclockwise rotation, the reverb effect is defeated.  
 
8. 

OverDrive Gain

- Adjusts the input level (gain). The input gain cascades into this control. This 

level can be set to match the input gain or can be set higher for more saturated gain levels. 
 
9.

 OverDrive Master

- Adjusts the output level.  

 
 

Summary of Contents for Two-Rock

Page 1: ...OWNERS MANUAL...

Page 2: ...n accordance with the manufacturer s instructions 8 Do not install near any heat sources such as radiators heat registers plugs and the point where they exit from the apparatus 9 Protect the power cor...

Page 3: ...of the amplifier Start with this control in the 12 o clock position Keep in mind that the amount of gain set here determines the signal level feeding the lead channel Low gain settings of this contro...

Page 4: ...ts the contour of high frequency response The high frequency response will increase as you advance the control clockwise 14 Stand by Switch Should be in the Off or stand by position when you apply pow...

Page 5: ...Master volume controls how much signal is sent to the send Effect Send Use this jack to send the amplifiers signal to outboard effects Effect Return Use this jack to connect the output of your effect...

Page 6: ...0 240 22 Watt 2amp 2amp 1amp 35 Watt 2 5amp 2 5amp 1amp 40 Watt 2 5amp 2 5amp 1 6amp 50 Watt 2 5amp 2 5amp 1 6amp 100 Watt 3 2amp 3 2amp 2 5amp FOOTSWITCH Overdrive Switches amp into overdrive mode Bo...

Page 7: ...re Take unit off standby and allow a few seconds for the circuit to stabilize Set voltmeter to Millivolt scale or lowest volt scale 60 millivolts 060 volts With meter grounded to chassis and probe at...

Page 8: ...other questions or comments that you may have We look forward to hearing from you PHONE 1 707 584 TONE 8663 M F 9am 5pm PST FAX 1 707 584 8661 ADDRESS Two Rock 619 Martin Avenue Suite 6 Rohnert Park...

Page 9: ...This is a product of PREMIER BUILDERS GUILD 619 MARTIN AVENUE SUITE 6 ROHNERT PARK CA 94928 707 584 8663 www two rock com SERIAL NUMBER _____________________________...

Page 10: ......

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