Plexitube - Uncategorized Radial Engineering - Free user manual and instructions
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| Product Type | Tube Preamp / Direct Box |
| Model | Plexitube |
| Brand | Radial Engineering |
| Dimensions | 5.5 x 3.5 x 2 inches (140 x 89 x 51 mm) |
| Weight | 1.5 lbs (0.68 kg) |
| Power Supply | 15V DC 400mA adapter (included) |
| Tube Type | 12AX7 vacuum tube |
| Inputs | 1/4" instrument input, 1/4" tuner output |
| Outputs | XLR balanced output, 1/4" buffered output |
| Controls | Drive, Level, Blend, Bass, Treble, Presence, Boost |
| Switches | Pre/Post EQ, Ground Lift, 180° Polarity, HPF |
| Features | Class-A tube preamp, 100% analog, Drag control for load correction |
| Construction | Steel chassis with baked enamel finish |
| Maintenance | Clean with a soft dry cloth; do not use solvents |
| Safety | Use only supplied power adapter; read manual before use |
| Spare Parts & Repairability | Contact Radial Engineering for replacement tube or service |
Frequently Asked Questions - Plexitube Radial Engineering
What type of tube does the Plexitube use?
The Plexitube uses a 12AX7 vacuum tube, which is a common dual-triode tube known for its high gain and warm tone.
Can I power the Plexitube with phantom power?
No, the Plexitube requires a 15V DC power supply (included). Phantom power from a mixer cannot be used.
What is the Drag control for?
The Drag control adjusts the load on the guitar's pickups to compensate for the cable length, preserving your natural tone.
Does the Plexitube have a headphone output?
No, the Plexitube does not have a headphone output. It is designed to send a balanced XLR signal to a mixer or interface.
How do I change the tube in the Plexitube?
The tube can be replaced by removing the bottom plate. Use a 12AX7 equivalent. Contact Radial for service if unsure.
What is the difference between Pre and Post EQ on the Plexitube?
Pre EQ sends the direct signal to the XLR output unaffected by the EQ, while Post EQ includes the tone shaping.
Can I use the Plexitube with a bass guitar?
Yes, the Plexitube works great with bass. Its Hi-pass filter can be used to tighten low frequencies.
Does the Plexitube require biasing?
The Plexitube uses a cathode-biased circuit, so no user biasing is required. Just plug and play.
What is the ground lift switch for?
The ground lift disconnects pin 1 on the XLR output to eliminate hum from ground loops.
Is the Plexitube stereo?
No, the Plexitube is a mono device. For stereo, you would need two units.
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USER MANUAL Plexitube Radial Engineering
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Product information
Brand : Radial Engineering
Model : Plexitube
Category : Uncategorized