Mojotone GA-5 Style Combo Amp Kit

9 Reviews
$325.00 to $574.95
SKU: G1GA5951
Weight: 19.5 lb
Sale Unit: Piece

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On Back Order

Add this cabinet to your cart to complete the kit: Gibson® GA-5 Style 1x8 Combo Cabinet





Kit Build Difficulty: 
Easy
 
Difficult

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.


Originally produced from 1954-1956 the GA-5 was often called Gibson’s answer to Fender’s 5C1- Wide Panel Tweed Champ. Both the Champ and the GA-5 used a 6SJ7, 6V6 and 5Y3 tube compliment and shared a very similar schematic and part assortment. Often over looked and undervalued, the GA-5 is a fantastic recording amp that loves to be pushed and also makes a great living room amp that puts out a warm clean tone at lower volumes.

 

Mojotone brings the GA-5 circuit back to life with the Mojotone GA-5 Style Kit. Featuring a classic TV Front cabinet, vintage inspired circuit now using a 6V6, 12AX7 and 5Y3 tube compliment – this unsung classic is the perfect amp kit to get you started on your amp building journey.

 

We offer a completely hand-wired GA-5 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.  Select "Assembled" in the drop-down menu above.  Don't forget to add the cabinet to your cart!  We will install the completed chassis into the cabinet for you!

 

  • Class Type:A All Tube Amplifier
  • Output:~5 Watts
  • Circuit:GA5
  • Bias Type:Cathode Biased
  • Build Time:~4 hours
  • Preamp Tubes:JJ ECC83/12AX7 (1)
  • Output Tube(s):JJ 6V6S (1)
  • Rectifier Tube:JJ 5Y3 (1)
  • Transformers:Power - Tweed Champ (MOJO759), Output - Champ (MOJO771)
  • Speakers:Mojotone AV8C 8" 4 ohm speaker
  • Cabinet:Add this cabinet to your cart to complete the kit: Gibson® GA-5 Style 1x8 Combo Cabinet
  • Hardware:GA-5 Small Parts Kit, GA-5 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 tech@mojotone.com 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 tech@mojotone.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:

 

GA-5 Schematic
GA-5 Wiring Diagram
GA-5 Instruction Manual

Ratings & Reviews

9 reviews

  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews
9/6/2021 11:14 pm

Easy to build, good instructions and best 5W amp

by Carlos -

Instructions were very thorough and well explained. Using the instructions I was able to wire everything without issue. On my first power up, the amplifier worked. The cabinet is top quality and American made, I don't even get cabinets this good from Fender or Marshall. Everything in this kit is American made.

The amplifier itself has a full rich sound, probably my favorite combo amp to date. Far better than my stock Blues Jr with the Jensen speaker and far outdone compared to a 5 Watt Marshall Class amplifier. 10/10 would recommend, hard to find a better tube practice amp.

2/17/2021 1:41 pm

Overall a good amp that was easy to build.

by anonymous

Built this in November. The great instruction manual made my first amp build easy. I liked the amp but always felt like it had a little something missing. I recently built a speaker cab with an 8 ohm 12 inch Eminence Legend, and I ran the amp (after changing output transformer taps) into that. Now it's absolutely fantastic. The amp has a very bluesy, vintage sound to it, and it handles pedals well. Overall a good amp that was easy to build.