This amplifier is my take on the Ampeg V4, but with a ton of very important improvements. Overall, the tone circuit and topology of the original design is maintained; but more options have been added, obsolete or unobtainable parts have been swapped for parts that are identical in circuit and sound but easily sourced, and tour worthiness or dependability of the overall design and power circuit have been vastly overhauled.
So, for those of us that want to dig into every absolute detail of this amplifier, I will go over every engineering detail here. Starting from the outside in, lets dig it apart
Mechanical / Housing
- Shell casing for this was done using the standard ~3/4" Baltic Birch cabinet grade plywood. Unfortunately, due to the ongoing Ukrainian war; getting A/AA grade plywood is almost impossible. That means that most of the sheets have eye fills, which are a bit unsightly and not optimal. To fix this, untolexed baltic birch ply will not be offered
Instead, you will see a variety of options for solid woods, and tolexed ply as well. The tolexed ply will be the double thick style as shown in the images, much like an Orange head. The solid wood finishes will be 3/4" thickness, more like a Fender or Verellen styled design; with box joint edge detailing (think 3/4" wide fingers). Solid wood double thickness can be sourced and made, but it will cost considerably more; so this will only be offered on request with a conversation
- The chassis is something that I wasn't willing to go light on; I've seen too many thin chassis that eventually sag and it isn't worth saving the extra 5 pounds of weight and 50$ of materials. These are using 14 gauge marine grade stainless steel. The sides are then welded into place with full length welds. Now, I will say my welding isn't absolutely stunning, but my penetration is great and they will be ground flush.
- The mounting inside the chassis is going to use snap in retainer nuts. I've tried press fit, riviting, and the snap in nuts; and these have been the most impressive in terms of overall maitenance. Both the press fit and riviting have a possibility of rotating in the housing, which can create a massive issue when removing the amplifier. The snap ins, even in a similar scenario, can be easily removed and replaced in about 5 seconds. They also allow for some flexibility in hole placement, making installing the amplifier after repairs much simpler; and then tighten down nicely for a locked in mechanical joint. Their only downside is a slight price increase but the benifits of overall road security are worth it. They can be seen here
- Corners are not shown in the example casing, we will be using these two screw small corners
- Side Handles will be as shown (large metal recessed spring loaded with rubber grip handles), which make for easy lifting, not awkward when handling the entire load up onto a cab, and won't rattle. Top handles will be added as well, these seem to be the best fit. A middle single handle can be added on request, but single hand carrying an amp this big is possibly harmful so by default it will not be on the amplifier
- Bottom feet are simple rubber feet. On request they can be swapped over to wooden slats if you want that old Matamp vibe.