6M45p Amp Kit

45W, 1×12, 2×12 or head. Complexity: 3


Cab Configuration * 

Cab Configuration

Pilot Lamp * 

Pilot Lamp

Tubes * 


Line Voltage * 

Line Voltage

Cab Covering * 

Cab Covering

Grill Cloth * 

Grill Cloth

Piping * 


Handle * 


Control Panel * 

Control Panel

A La Carte

A La Carte

Classic model 1987 circuit. 45-50W. More gain than the standard 6M45

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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• 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
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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.

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1 review for 6M45p Amp Kit

  1. David (verified owner)

    Well, this kit was a challenge. It was my 13th and the first one I had to send in to get it working right. I made a couple mistakes with resistor values and grounding and Weber helped me out. The challenges I faced, other than the mistakes, were several. First- this design uses an enormous number of filter capacitors in the power supply. The cap board is supposed to fit between the power transformer and the circuit board but is way too crowded. Second, the 3/4" spacers for mounting the board are too short, resulting in the board touching power tube socket pins. The impedance selector switch is large and touches power tube socket pins. So here’s what I did: I made an epoxy turret board for the capacitors and mounted it on top of the chassis. Also made an epoxy turret board for the main board. I sourced a smaller impedance switch from Mojotone. in order to measure bias, I used 1 Ohm 1W 1% resistors from pin 8 to ground on the power tubes. Also used Orange Drop capacitors in the preamp portion. My mistakes were to use 470 instead of 470K mixing resistors which caused undesirable interaction between the channels, also made grounding mistakes since there is a preamp and a main ground. After it got corrected, it is a roaring beast. Hard to believe it is only 45W. It was a challenge and the experience helped me with my next project, the Natalie amp.

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