British Style 45W Head Amp Kit
This kit has a lead time. Check here for more information.
Please read our article 'Mojotone Amp Kit Building Primer' along with our amp kit disclaimer located in the Specs tab before buying this kit.
This was the first amplifier Marshall® ever built, based off of the 5F6A circuit. Favored by blues and rock guitarists, this amp can produce a warm sustain and elegant clean tones, with a pronounced rectifier "sag." Played by guitar greats such as Angus Young and Gary Moore.
- Class Type:AB All Tube Amplifier
- Output:~45 Watts
- Bias Type:Fixed Bias with an adjustable potentiometer
- Build Time:~6 hours
- Preamp Tubes:JJ ECC83/12AX7 (3)
- Output Tube(s):JJ E34L (2)
- Rectifier Tube:JJ 5AR4 / GZ34
- Transformers:Power - 45 (7020300), Output - 45 (7021300), Choke - (MOJO777)
- Cabinet:British Head Box Cabinet
- Hardware:British 45 Small Parts Kit, British 45 Chassis, Front & Rear Faceplates, 10' Removable Power Cord
Disclaimer: Some of the parts contained in this kit are subject to availability.
Mojotone reserves the right to change or substitute any and all of the parts contained in this amplifier kit without advertisement or notification to the buyer. Part substitutions made by Mojotone are guaranteed not to affect the integrity or operation of your amplifier kit. Time estimates listed are from start to finish. If you are new to tube amplifiers, additional time may need to be factored.
When purchasing a kit from Mojotone, you will receive the following documentation.
2. Wiring Diagram / Layout
Our beginner level kits such as the tweed champ and tweed deluxe include a manual. If you purchase a kit from Mojotone and do not receive these documents, you can obtain copies by emailing firstname.lastname@example.org or calling 800-927-6656. The Mojotone staff is available Monday through Friday from 8:30 a.m. to 5:00 p.m. EST unless otherwise closed.
Mojotone kits include the best quality parts that are available at the time of purchase. If a substitution is required, our team will use parts that are of equal quality to ensure the integrity of the kit build remains the same.
Building a fully functional amplifier kit is not an easy task. Before building a kit, one should have the ability to properly solder as well as read and understand a schematic and wiring diagram. While we do our very best to ensure all documentation is current, the included documentation is meant to serve as an overall guide to building the amplifier. Simply following the schematic and wiring diagram does not guarantee you will have a fully functional amplifier. In fact, post build troubleshooting is a common issue across all builds.
Our staff is available to assist with basic troubleshooting needs. There are plenty of online videos available that are helpful with most post build issues. Technical staff is available via email by sending a message to email@example.com. You may also call our sales team to discuss build problems, dial 800-927-6656 and press 1 for sales.
Building a tube amplifier takes time, dedication, resources and most importantly... Skills! The experience of building an amp can come with some frustration, the reward of completing the build is definitely well worth your time. Please review the wiring diagram, schematic and manual (if applicable) prior to making your purchase. Mojotone will not accept any returns on amplifier kits and/or parts that have been assembled, soldered or modified.
This amp kit also comes with the following documents. Please feel free to view and/or download them:
Ratings & Reviews
Plenty of power and great tone.
Bought this project when I had a total knee replacement to give me something to do. The diagram is easy to read and went together very easy. It took me longer due to my recovery from surgery. Plenty of power and great tone.
I am a happy camper!
I'm very happy with the finished result and the amp sounds great!
I got the JTM45 as a retirement gift from the company I worked for. I found that the parts and components were high quality. The instructions that come with the kit are minimal. A schematic and wiring diagram comes supplied. Be sure to check website in case of any updates to wiring diagram. I did have an electrical engineer check my work after I finished building it. Iâ€™m very happy with the finished result and the amp sounds great!