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Related Manuals for Ceriatone Plexi 50
Summary of Contents for Ceriatone Plexi 50
- Page 1 Plexi 50 50W GUITAR AMPLIFIER User’s Manual...
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Page 2: Table Of Contents
Thank you for the purchase of your Ceriatone guitar amplifier! Here, we hope to explain how best to use your new amp. Table of Contents 1) About the Plexi 50...……….…………………………………………………………………………………………page 2 2) Quick setup……………………………………………………………………………………………………………page 3 3) Front Panel controls………………………………………………………………………………………………….page 4 4) Rear Panel controls…………………………………………………………………………………………………..page 6... -
Page 3: 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 Plexi’s rear panel MAINS cable inlet to your wall power receptacle 3) Plug the Plexi into your speaker cabinet using 1/4”... -
Page 4: Front Panel Controls
3) FRONT PANEL CONTROLS From left to right: 1) POWER 2-way toggle switch 2) STANDBY 2-way toggle switch 3) INDICATOR LED 4) PRESENCE control 5) BASS control 6) MIDDLE control 7) TREBLE control 8) VOLUME I control (PULL engages BRIGHT mode) 9) VOLUME II control 10) INPUT I and II input ¼”... - Page 5 STANDBY applies high voltage to the vacuum tube anodes (and screen grids) during use of the Plexi. To ensure long tube life, first power the unit on with the STANDBY toggle switch in UP position for approximately 30 seconds. You can then switch to DOWN (“ON”) to use the Plexi.
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Page 6: Rear Panel Controls
4) REAR PANEL CONTROLS 1) SEND ¼” instrument jack 2) RETURN ¼” instrument jack 3) IMPEDANCE SELECTOR three-way rotary selector 4) SPEAKERS ¼” speaker jacks (x2) 5) BIAS TEST probe jacks (x2) 6) COM probe jack 7) FULL / HALF 2-way toggle switch 8) HT FUSE 9) MAINS FUSE 10) MAINS IEC cable inlet... - Page 7 IMPEDANCE SELECTOR three-way rotary selector. Set to the position that matches the impedance of your speaker cabinet. NOTE – if you are using two speaker cabinets in parallel (ex – two 16 Ohm cabinets), set the impedance selector to half that of a single cabinet (in this case, 8 Ohms).
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Page 8: Tube Compliment And External Bias Jacks And Adjustment
5) TUBE COMPLIMENT AND EXTERNAL BIAS JACKS AND ADJUSTMENT From left to right: V1 – JJ 12AX7/ECC83S (input stage 1 for BRIGHT and NORMAL channels) V2 – JJ 12AX7/ECC83S (gain stage 2 and tonestack driver) V3 – JJ 12AX7/ECC83S (phase inverter for power amplifier) V4 –... - Page 9 In this diagram, we have color coded features for simplicity 1) Blue arrow – bias adjustment potentiometer 2) Green arrow = bias probe jacks (left = V4, right = V5) 3) Red arrow = black probe jack, ground (“COM”)
- Page 10 To measure your power tube bias, carefully follow these steps with the amplifier in OPERATE and connected to a speaker load (not doing so may damage your amplifier!): 1) Turn on a digital multimeter (DMM), and set it to read millivolts (mV) in the 100mV range (this will vary from DMM to DMM) 2) Plug a black probe into the color-coded jack on your DMM, and do the same for a red probe 3) Insert the black probe tip into the black probe jack (red arrow).
- Page 11 Even though the bias test points and adjustment is external to reduce risk of electrical shock, all precautions must be taken while biasing. 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 12: Frequently Asked Questions
8) 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 parallel? - The FX loop is series, and is currently parallel. However, we have plans to release an option for a tonally transparent solid-state FX loop. - Page 13 6L6GCs, modern 6V6s like Electro-Harmonix, JJ) may be possible, but please first consult Ceriatone Amplification or your local competent amplifier technician. Do I need to use a matched and balanced phase inverter? - It is not necessary. Feel free to experiment with different tubes (of the same type) in your Chupacabra, though! I’ve read that the components used in this type of amplifier are really important.