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Dear Customer, 
 

Thank you for your purchase of a 

 

amplifier from Premier Builders 

Guild.  
 
 
As a discerning guitarist, you know the road to great tone begins with 
great components. 
 
Our Classic Design, carefully selected parts and hand-built approach 
combine to make an extremely versatile instrument. 
 
Please take the time to read this manual.  We hope it will answer any 
questions that you may have. 
 

We extend a warm welcome to you as a member of a select group of 
musicians who have chosen a 

 

amplifier.

 

 

 
 

Important Safety Instructions

 

1. Read these instructions 
2. Keep these instructions 
3. Heed all warnings 
4. Follow all instructions 
5. Do not use this apparatus near water 
6. Clean only with dry cloth 
7. Do not block any ventilation openings. Install in 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 cord from being walked on or pinched particularly at plugs and the point 
where they exit from the apparatus 
10. Only use attachments/accessories specified by the manufacturer 
11. Unplug this apparatus during lightning storms or when unused for long periods of time 
12. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has 
been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled 
or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, 
does not operate normally, or has been dropped 

13. CAUTION: To disconnect the unit completely from the MAINS, unplug the unit. Turning the power 

switch off does not disconnect the unit completely from the MAINS. 
 

Summary of Contents for Two-Rock Studio Pro 50

Page 1: ...OWNER S MANUAL...

Page 2: ...nce 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 cord from be...

Page 3: ...ts 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...

Page 4: ...Level This control has a pull bright function The loop is active in the circuit even with no effects connected so the level control acts as a master volume The pull bright feature is useful when playi...

Page 5: ...utput tube sockets A digital voltmeter and small screwdriver are required for bias adjustment BIAS ADJUSTMENT PROCEDURE Power up unit and connect proper speaker load DO NOT have an instrument connecte...

Page 6: ...35watt and 50watt Factory Setting 064V 1200V to 1400V for 100watt Factory Setting 1260V 6V6 Installed in the 22watt versions only 044V to 058V Factory Setting 054V 6V6 Installed in 22watt versions wit...

Page 7: ...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 8: ...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 _____________________________...

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