Tweed Princeton® 5F2-A Style Combo Amp Kit

9 Reviews
$359.96 to $899.95
Sale Unit: Piece

In Stock


Kit Build Difficulty:

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.

Mojotone’s Tweed Princeton Style Amp is based on the classic 5F2-A circuit which was introduced in 1957 and is the most widely known Princeton circuit. These amps have a wonderful negative feedback which gives them a smooth and balanced sound. Our Princeton style amp is a faithful recreation of the originals, which were rumored to be the most recorded guitar amps of all time.


Utilizing one 6V6 power tube and one 12AX7 preamp tube, it is a Class A circuit with a clear and chimey quality that is desirable for recording any style of music. To complement this 5 Watt amp’s output, we chose our Mojotone AV8C American Vintage 15 Watt speaker for its warm, crunchy, early breakup and articulate yet aggressive sound.


Our Tweed Princeton style amp has two inputs; low and high. The low input is is more tame with a slightly warmer overall sound, while the high input breaks up easier and is glassier and brighter in nature. The amp has one tone control and one volume control and relies on the brilliance of the circuit’s inherent sound to provide the player with quality tone as the controls are tweaked. Enjoy the luxury of being able to dial in a punchy and clear sound at any volume without having to spend hours tweaking your EQ.


We offer a completely hand-wired Tweed Princeton style amp assembled by our expert builders right here at Mojotone headquarters. Our in-house technicians have an extreme attention to detail and take great pride in their work -- our builds are 100% guaranteed.


For those players who are a little more "hands-on," we also offer the amplifier as a kit with a variety of options including small parts only, full kit (both head and combo configurations), export specs, and more.


  • Class Type:A All Tube Amplifier
  • Output:~5 Watts
  • Circuit:5F2-A
  • Bias Type:Cathode Biased
  • Build Time:~4 hours
  • Preamp Tubes:JJ ECC83/12AX7 (1)
  • Output Tube(s):JJ 6V6 (1)
  • Rectifier Tube:JJ 5Y3
  • Transformers:Power - Princeton Power (MOJO760EX), Output - Champ (MOJO771)
  • Speakers:Mojotone AV8C 8" 4 ohm Speaker (1)
  • Cabinet:Tweed Princeton 1x8 Combo Cabinet
  • Hardware:Tweed Princeton Small Parts Kit, Tweed Princeton Chassis, 10' Install 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.

1. Schematic

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 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 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:

Tweed Princeton Schematic
Tweed Princeton Wiring Diagram

Click HERE to view an image of this chassis completed in accordance with the schematic provided above.

Ratings & Reviews

9 reviews

  • 4 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews
2/17/2021 1:42 pm

the quality is on point!

by anonymous

I'd like to start with a cliche: "If you judge a fish by its ability to climb a tree it will spend its entire life believing it is stupid."

As others have said, the 3 star review is wholly unwarranted given the low wattage and history of this amp. It's not meant to be a gigging amp (unless you happen to be in a situation where you can put it in an iso-box with a mic). What this amp IS, is a fantastic recording / practice amp. I did blend the 5F2 and 5F2-a circuits a bit by adding a choke in the power/filter caps. Other than that, it's all Mojotone parts. And as usual, the quality is on point! I'm pairing mine with a GA10-SC59 and could not be happier with the results!

2/17/2021 1:42 pm

The customer service with this company is top notch!

by anonymous

Great Kit, this is my first amp build and it was pretty straight forward. I had bought this 15% off during the Memorial Day Weekend sale and it is an awesome kit, love the small parts kit in the organized box and detailed drawings. I didn't receive a cabinet and they sent one out the same day I called, even upgraded it to a lacquered package. Had a no sound issue and received an email with troubleshooting tips within minutes, this helped me find out that i had no voltage at the 6v6 due to me not soldering the correct pins on the 5y3 rectifier tube (had the reds to 3/5 instead of 4/6 as in the drawing, I swear i checked all the wires 10 times before firing up the soldering iron, but these thing happen to us newbies. MOJO Tone was there to help. The customer service with this company is top notch! I would definitely recommend them to others with a 5 star rating in customer satisfaction.