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Summary of Contents for Ceriatone TW Expression All Access
- Page 1 TW Expression “All Access”...
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Page 2: Table Of Contents
User Manual Thank you for the purchase of the Ceriatone TW Expression All Access guitar amplifier! Here, we hope to explain how best to use your new amp. Table of Contents Page 1) About the TW Expression All Access 2) Quick Setup... - Page 3 2. Buffered Effects Loop We have added a transparent buffered loop, so that you can use your favorite pedals with the amp. 3. Post PI Master Volume For you to better control volumes, to even play in your bedroom! 4. Tube / Solid State Rectifier Selection A cool addition to be able to have Tube Rectification, which the original TW Expression does not have! 5.
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Page 4: Quick Setup
2) QUICK SETUP (for instant gratification) 1) Plug your guitar using a 1/4” instrument cable into the upper I input on the right of the front panel 2) Plug a suitable power cable from the rear panel MAINS cable inlet to your wall power receptacle... -
Page 5: Front Panel Controls
3) Plug the amp into your speaker cabinet using 1/4” speaker cable 4) Set the IMPEDANCE SELECTOR to the match the impedance of your speaker cabinet 5) Set all rotary tone and gain controls on the front panel to 12:00 (clock face) 6) Set VOLUME controls at just above minimum, with PPIMV set to full 7) Set front panel POWER switch in the ON position (down position, with adjacent STANDBY switch in the “STANDBY”... - Page 6 18) VOLUME 1 control 19) BRIGHT 1 3-way toggle switch 20) INPUT jack 21) FOOTSWITCH jack POWER two-way toggle switch powers the amp on and off. STANDBY applies high voltage to the vacuum tube anodes (and screen grids) during use of the amp.
- Page 7 CHAN LED The LED turns red when you are in the OD channel MIDDLE adjusts the mid frequency response MID Boost is a 2 way switch, that allows for selection of a higher valued Treble capacitor, like in Dumble amps. With the mid boost engaged, you can have a thicker sound, and stock sound when it is off.
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Page 8: Rear Panel Controls
4) REAR PANEL CONTROLS From left to right: 1) SEND ¼” instrument jack 2) LOOP ON OFF switch 3) RETURN ¼” instrument jack 4) IMPEDANCE SELECTOR three-way rotary selector 5) SPEAKERS ¼” speaker jacks (x2) 6) NEGATIVE FEEDBACK (NFB) 7) BIAS TEST probe jacks (x2) 8) COM probe jack 9) FULL / HALF 2-way toggle switch 10) HT FUSE... -
Page 9: Impedance Selector
SPEAKERS ¼” speaker cable jacks. Use a ¼” speaker cable to connect your speaker cabinet to the amplifier using these jacks. If you use one speaker cabinet, either jack is acceptable. NOTE – never turn your amplifier to OPERATE mode (“1” / DOWN position on STANDBY) without connecting the amplifier to a speaker cabinet or suitable dummy load! Failing to do so may damage your amplifier! NEGATIVE FEEBACK (NFB) is a 3 way switch to select different NFB resistor values:... - Page 10 5) TUBE COMPLEMENT AND BIAS ADJUSTMENT V3 BIAS POT V4 From left to right: V1: 12AX7/ECC83 (Input stage Bright and Normal channels) V2: 12AX7/ECC83 (stage 2 and tonestack cathode follower) V3L: 12AX7/ECC83 (phase inverter for power amplifier) V4-V5: EL34 (power tubes) V6: GZ34 (tube rectifier) BIAS ADJUSTMENT CONTROL IS INDICATED BY THE RED ARROW To measure your power tube bias, carefully follow these steps with the amplifier in...
- Page 11 To save you some time and energy, here are those two values: - Approximate V4 and V5 plate voltage for TW Expression All Access amp = 400 VDC with Solid State Rectifier chosen - Maximum plate dissipation for EL34s = 25W …and now some math.
- Page 12 Biasing should only be done on a clean workbench with no distractions. Do not wear loose clothing or any jewelry. Take your time, and think carefully before each step. Again, bias at your own risk. Ceriatone Amplification is not responsible for any damages or injuries resulting from user biasing.
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Page 13: Frequently Asked Questions Page
6) FREQUENTLY ASKED QUESTIONS How do I hook up this thing? - See Section 2, beginning on page 3. Is the FX loop series or parallel? Active or passive? - The FX loop is series, and is a buffered solid state type Can I substitute different tube types? - Although you can try 12AT7s, 12AU7s, 5751s without any harm, the design is optimized for 12AX7s, and are therefore the only recommended... -
Page 14: Settings Templates
7) How to achieve the original TW Express circuit? For the original TW Express circuit: a) Rectifier – Solid State b) Hi Cut – 0 (no cut) c) PPIMV - Full (defeated) d) Bite - Left (0.1uF) e) Channel - OD Channel f) Gain Character - Middle (gainiest) None g) Mid Boost - Left (Off) h) Bright Cap - To Taste...
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