In excellent working condition. USA made Accutronics Type 8 spring reverb tank. THD PLEXI REVERB 410. Resplendent in its tweed covering and brown grill. Cloth, the Plexi Reverb is the latest in THDs line of variations on the 4×10 Fender. The handbuilt combo features Normal and Bright channels, each with its. Own volume control and dual inputs. Both channels share a common set of treble, bass. Middle, and presence controls. The Plexi extracts 65 watts from a pair of Groove Tubes. EL34s to drive four 10 THD Longhorn speakers. The rear panel, or more correctly the. Underside of the chassis, contains the speaker and external speaker jacks, reverb knob. Effects send and return jacks, and footswitch jack. Theres also a mystery mode switch. Changes output impedance, thats intended as an additional tone control. We tried it-it works. Encased in a fi. Nger-jointed birch-ply cabinet, the THDs circuitry is exposed by. Removing a tweed-covered rear panel and a steel cover plate thats secured by 14 screws. This amp uses seven PC boards and one small bread-board containing the reverb send. The only IC we could fi. Nd is on this circuit, which serves as an impedance buffer. And takes the place of a reverb transformer. The interior is laid out neatly and the parts. Quality is very high. The two EL34s and four preamp tubes are affi. Xed to separate shock. Mounted assemblies; this helps protect the tubes from the kind of banging around theyre. Bound to receive in transit. This is a great idea; anything that prolongs tube life is a real. The reverb tank sits on rubber grommets, instead of being screwed directly to the. This helps to isolate the tank from the cabinets vibrations. The Plexi Reverb is protected by four internal fuses plus an external. A voltage selector is accessible through the steel cover plate; THD says. This selector acts like a Variac. You can set the selector to 140V and the amp. Will respond as if it were getting less than 100V. We tried this trick an found it lowers the. Volume and tightens up the bottom end. Handy meter points and detailed instructions make. This amp particularly easy to bias. The Plexi Reverb is a crunchy, distorted-sounding amp that exudes a strong rock. And roll persona with a bright, snarly, vintage Fender timbre. Plugged into the Bright. Channel, we could set the presence and treble knobs at zero and the tone would still be quite. In this channel, the controls are very interactive; we found that the unused Normal. Volume knob affected the bas frequencies even more than the bass control. Plugged into the Normal channel, the Bright volume knob acted like a notch fi. From 5-8 yielded a cool, skanky midrange dip. At settings above 8, the bass boosted to the. This interaction between channels does not occur to nearly the same. Degree on either the Kendrick 4212 or Fender Reissue Bassman; its the secret to getting a. Great sound from the THD. We A/Bd the Plexi with a particularly juicy 73 Marshall JMP 50-watt head, both. Amps driving similar 4×12 cabs, and found the THD sounded very close to it. Comes with a 12AY7 preamp tube in a special holder. You can swap this for the. 12AX7/7025 in the fi. Rst position for a cleaner sound. Custom mods are also available from. The Plexi, in fact, originated from a customers request. Its now THDs best. Comments: Nice sweet lead tone. Though it looks like a tweed, it sounds. Lots of sounds, thanks to the interactive volume controls. Reminiscent of Eric Johnson. The item “THD Plexi Bassman guitar tube amplifier 4×10 Vintage Speaker Tweed Spring Reverb” is in sale since Wednesday, February 27, 2019. This item is in the category “Musical Instruments & Gear\Guitars & Basses\Guitar Amplifiers”. The seller is “baybbayb” and is located in Canyon Country, California. This item can’t be shipped, the buyer must pick up the item.
- Brand: THD
- Model: PLEXI
- Number of Channels: 2
- Country/Region of Manufacture: United States
- Amplifier Technology: Vacuum Tube
- Amplifier Type: Head
