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Dear Customer, 
 
Thank you for your purchase of a 

Two-Rock

 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 

Two-Rock

 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 Coral 100

Page 1: ...OWNERS MANUAL ...

Page 2: ...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 dur...

Page 3: ... 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 7 Deep Switch Boosts the low and low mid frequencies This is a low frequency contour switch changing the low and low mid response 8 Input Gain Adjusts the overall gain of the amplifier Start with this control in the 12 o clock posi...

Page 4: ...decay time Advancing the control clockwise increases the signal applied to the driver and a very saturated effect with a sharp attack and a long decay can be obtained 16 Clean Reverb Return The reverb return control mixes the reverb effect signal with the dry signal At full counterclockwise rotation the reverb effect is defeated Using the return control in conjunction with the reverb drive control...

Page 5: ...armonics to the signal path 5 Speaker Output Jacks There are two sets of speaker output jacks Nominal impedance is 4 8 ohms The output section has the ability to run a set of speaker loads in parallel Duel 4 ohm jacks can be used to take two 8ohm speaker loads and combine them to a 4 ohm load Duel 8 ohm jacks can be used to take two 16ohm speaker loads and combine them to a 8 ohm load NEVER OPERAT...

Page 6: ...this number and have it handy in case you need service or in the event that your amp is lost stolen or damaged 12 Footswitch Jack The footswitch connects here The clean overdrive and tone bypass functions can only be activated via the footswitch Fuse Chart Fuse Chart All Fuses are 3AG Type 250 Volt SLO BLO 100V 120V 220 230 240 22 Watt 2amp 2amp 1amp 35 Watt 2 5amp 2 5amp 1amp 40 Watt 2 5amp 2 5am...

Page 7: ...ENTS Power up unit and connect proper speaker load Set master volumes and effects return controls to zero DO NOT apply any signal to the input during the biasing procedure 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 test point measure voltage A re...

Page 8: ... Two Rock amplifier will provide many hours of enjoyment and inspiration in the years to come This manual is a resource for some of your questions Please contact us with any 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 CA 94928 SERVICE service tw...

Page 9: ...This is a product of Premier Builders Guild Two Rock 619 MARTIN AVENUE SUITE 6 ROHNERT PARK CA 94928 707 584 8663 www two rock com SERIAL NUMBER _____________________________ ...

Page 10: ......

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