Blackface Princeton Reverb® Style Amplifier Kit

3 Reviews
Weight: 15.8 lb
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.

The Blackface Princeton Reverb has been a staple in guitar tone since its inception in 1964. Similar to the idea behind the Vibrochamp, the Princeton Reverb was essentially all the good parts of its predecessor, the Tweed Princeton, but with a long-spring reverb and tube-driven tremolo circuit added. These amps were ideal not only for use in the studio, but for traveling and gigging with as well. Over the years the Princeton Reverb has worked its way into the gear repertoire of many renowned guitarists such as Ryan Adams, Larry Carlton, Glen Campbell, and Tommy Tedesco.


The Mojotone Princeton Reverb style amp is a 12-15 watt miniature giant that goes well with a Jensen C10Q 10” 35 watt speaker.  Like the original Blackface era Princetons, the Mojotone amp has the added gain stage after the reverb that pushes the amp to a thicker level of saturation when the amp is pushed.  This effect, mixed with the smooth compression of the 6V6 tubes and the classic tone of the Jensen speaker makes for a creamy and soulful tone with a ton of character.


The amp has one channel with two inputs. Input 1 is slightly hotter where input 2 is just a bit more mellow. The advantage here is the ability to plug in a guitar with single coils to input 1 and a guitar with humbuckers to input 2 without having to worry about making manual adjustments to the amp’s volume level when switching guitars. The control panels from left to right reads “volume, treble, bass, reverb, speed, and intensity.” This means you get all the unique tonal qualities of the classic AA1164 circuit as without having to spend hours dialing in the right sound with too many knobs. This amp is designed to give any guitarist a pure, articulate tone that is appropriate for any setting and handles a pedal chain beautifully. Just plug your guitar in and you’ll be jammin’ “Surfin’ USA” in no time.

  • Class Type:AB All Tube Amplifier
  • Output:~12-15 Watts
  • Circuit:AA1164
  • Bias Type:Fixed
  • Build Time:~5 hours
  • Preamp Tubes:JJ ECC83/12AX7 (3), JJ ECC81/12AT7 (1)
  • Output Tube(s):JJ 6V6S (2)
  • Rectifier Tube:JJ 5AR4 / GZ34
  • Transformers:Power - BF Princeton Reverb (MOJO760EX), Output - BF Princeton Reverb (MOJO772), Reverb Driver - (MOJO776)
  • Hardware:Princeton Reverb Small Parts Kit, Princeton Reverb Chassis, Front & Rear Faceplates, Fender style 2-button Footswitch, 4AB3C1B Reverb Tank, Black Tolex Reverb Bag, Vintage Reverb Wire Kit, 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:

Blackface Princeton Reverb Schematic

Blackface Princeton Reverb Wiring Diagram

Blackface Princeton Reverb Instruction Manual

Ratings & Reviews

3 reviews

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5/7/2022 5:39 pm

Great sounding, high quality and fun to build!

by Rod -

I just built the PR style kit. I would definitely do it again. The kit contains high quality parts and a few nice upgrades. The wire length provided was not enough. There are a few spots where specific instructions are missing or inaccurate. In one spot the instructions provide conflicting information that tripped me up. I used black and white wire as stated in the manual, but I should have used green (20 ga solid). The black and white wire was intended for the speaker. My kit was missing a few fasteners that I did not have on hand and included an extra resistor and capacitor. I spent quite a bit of time making sure I did not miss something as I did not anticipate having parts left over. None of these are big deals, just minor hassles. I'm very happy with the kit, my build and love the final product. It's definitely better than modern production amps from big companies. Now if they can just improve the lead times I'll build my next kit.

4/25/2022 9:29 pm

A great kit that will make a great amp

by Trevor May -

A very well put together kit, with good instructions and nice parts. I really like the mojo branded CTS pots - nice touch! I forgot what a joy cloth pull-back wire was to work with. The final result was a well-sorted Princeton that is very quiet and sounds great at all volume levels.
I built this amp for myself, but I would build it for a client without any worries that it would fail - even under typical touring conditions. I did some minor changes (installed a bias control, screen resistors, and grid stoppers), which I would recommend for any Princeton. Take your time and check things as you go, and you'll have a great amp at the end of it. And remember kids, probe with one hand!