6M18 Amp Kit

18W, 1×12, 2×12, or head. Complexity: 3


Out of stock

Variations on the classic 18 watt amp. Choose either Vibrato circuit or TMB (treble middle bass).

If you would like this kit assembled for you by one of our techs, you can email your request HERE. for a build quote.


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Thank you for your interest in Weber Amplifier Kits. We would like for you to read the following information so you are aware of some of the issues involved with building an amp kit.

• We provide a layout and a schematic, but we do not include step by step assembly instructions.
• Troubleshooting advice can be found in the Kitbuilding section of the Forums
• Kits with cabinets ship as one complete shipment.
• Lead time for kits is at least 4 weeks and ebbs and flows with the world’s production/supply.
• All kits are shipped with signature required for delivery.

Please Read: The complexity of Weber kits ranges from very simple to extremely complex. We do not recommend anyone attempting to build any of our kits that are rated at 3 or higher in complexity unless you have the assistance of a qualified amp builder or electronics technician. Because of the sensitivities to wire placement, grounding schemes, and other parts related issues, troubleshooting the potential malfunctions and noises can be very frustrating without the experience and knowledge. All Weber amplifier kits have lethal voltages that are present even after power is removed. You must exercise extreme caution when working with high voltages. Before ordering any of these kits, you should look over the schematics and layouts provided for each kit to ensure there is enough information for you to feel comfortable building the kit. Click here for an explanation of complexity ratings.

• Check out some photos of kits built by our customers
• BOM (Bill Of Materials) for all kits we offer (MS Excel format)
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“Hey guys, these kits aren’t Lego™ sets. They require some thought, experience, and the correct tools. If you do not think you have the time, ability, nor tools to do this, maybe this isn’t for you right now. If you still want to build one of our kits, but are a little uncertain, please enlist the aid of a qualified tech.” — Ted Weber.

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VIB (combo)



VIB (head)



TMB (combo)



TMB (head)


2 reviews for 6M18 Amp Kit

  1. Kevin

    I built the 6m18VIB variant with 2X10 blue dog speakers. I used all stock parts, no upgrades with the exception of the pilot light which I broke while trying to use is. This is a great kit if you’ve never built your own amp before and it sounds and looks great too. And oh yes, it’s loud enough for my three-piece band without mic-ing the amp, at least for bar-type venues.

    If you buy a kit from. Weber, I urge you to leverage the Weber forum. There are a great many knowledgeable people there that will get you through any tough spots you may encounter.

  2. Marcus (verified owner)

    Im giving Weber 5 stars on the strength of the great value of this amp kit. The 18 watt Marshall combo amp is the most well trodden ground among DIY amp builders, its also the most "sacred" ground in a way.The 18 watt Marshall is said to be the one that, not only touched off the DIY tube amp/vintage gear building thing, but it revived a GREAT AMP that was forgotten by most everyone including Marshall amplification, who as a consequence of DIY interest began offering a reissued hand wired version and they still do. Ok blah blah blah. I do have at least one criticism of this kit -the turret board..the turrets do not have a great tinned-coating and can be difficult to solder. On top of that the board itself seems slightly thin (lets say metric ) and seems slightly less resistant to heat than it could be so you get this situation where the turrets need more heat for the solder to stick and the board doesn’t like it. Clean the turrets with acid wash and or alcohol before working and use enough flux for best results. The cabinet I received is beautiful with no flaws. The chassis is punched out for the old 1960’s layout which is what the Weber layout is. Some other 18 watt kits have incorporated design elements of the new reissue HW amps , including a closed ended chassis, and a modern style power cord and a "top" mounted cap can.. .This Weber kit is laid out like the vintage amp and uses a vintage style open ended chassis and through hole power cord, and the 32-32 cap is mounted in line with the tubes – just like a 1960’s amp. I used a step drill to drill a hole for the cap can on the "top" (front facing surface) – between the transformers ,like the reissues , and used the now empty, hole on the back/bottom to mount a Marshall style, round impedance selector switch. These are fantastic amps that sound all Marshall with the peaked mids and the tight lows and the overdrive grind.

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