Fratus-Amplification.com Custom-Built Amp Price Estimator
Choose the features of your new amp!
You must include your name and phone number or your email address to get a response from me!
All amps are designed by me. I start with the traditional circuits that the manufacturers published back in the 60's.
I won't clone someone else's amps. First of all, it just isn't right. Second of all, mine just might sound better!
All amps are all-tube*, hand-wired, point-to-point, tag or turret-board construction, or my new modular board method.
They are built right here in Houston**. I use parts from known parts suppliers.
All amps are built in a head-only format on an aluminum chassis, and are usually built with ceramic sockets.
All variable controls are 24mm Alpha pots with 1/4" solid shafts.
Circuits are usually simulated first on LTSpice, a really
great program for analyzing frequency response and phase distortion, and then verified with real hardware. They are built
using the best practices of current and safe electrical manufacturing. The AC supply and HV circuits are both fuse protected.
Fuses are user-accessible from the back of the amp without tools. Only grounded AC cords are used.
With a Plain, Fancy or Exotic Case: They are housed in a beautiful solid wood cabinet that is sanded and painted with
clear polyurethane (or other covering as ordered) finished edges and a handle on top. There is a metal mesh on the back
that is removable for access to the tubes, and a fabric (or other requested material) cover for the front like most amps.
For Audiophile amps, choose an appropriate level of casing. They are in anything from a painted metal chassis with wood trim,
up to stainless steel, etc. Please include a link to a photo of the "look" you are considering. If you want an Audiophile amp, make a note.
For Audiophile amps, I use completely different designs which provide more headroom and low distortion. I have made Audiophile amps, but have no sound samples of them.
You can also request a rack-mount amp, but you have to do that directly as it is not implemented here.)
It is pretty much your choice of colors and materials.
Look at my Products Page for an example of what
I have been building. Read the text with the amps to read a more detailed description.
You can request a certain look or colors, or a certain fabric for the front. I can leave it unfinished as well.
Chassis-only amps can be made in tubes-up (like a Marshall JCM800) or tubes-down (like a Fender Twin) or to be
mounted on the back of the chassis like most tweed amps. I prefer the tubes-up style.
Of course, we will have to work out all the details, and only then arrive at a price.
When you are finally satisfied with the results, and if you have included your email or name and phone number,
I will contact you to finalize the details. When we are agreed to the final design, I will then write an invoice
for 50% of the cost as a down-payment so we can get started!
Amps usually take anywhere from a month to two months to finish, depending on the complexity.
Everything is already pre-selected for the most common choices. Change it to what you want!
New formula on 2/12/2016.
You can hit the BACK button when you get the result to adjust your values and re-submit them.
* Exceptions to "all-tube" are in your choice of solid-state rectifiers and also diodes in the bias supply if you chose
anything but self-bias (which is like Class A).
** Exceptions to "built in Houston" are with the solid-state accessories, like the echo, reverb, and the delay modules.
Call, but please not before 9AM.
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