FJA Custom Built Amplifiers

Clones, one-off designs, and rack preamps — guitar, bass, or harp.

I offer custom built amplifiers — from a clone of your favorite vintage amp to a one-off design made just for you. I also build rack preamps. Email me with what you're looking for and we can discuss options.

FJA FH100 custom amp
FJA FH100
FJA FB100
FJA FB100 — 2 channel
FJA custom FB amp for Nick Koykas
Custom FB amp built for Nick Koykas
FJA custom 2 channel FB/FJ
Custom 2 channel FB/FJ for Nick Koykas
FJA FJ100
FJA FJ100
FJA Plexi style amp
FJA Plexi style amp
FJA Plexi in Marshall box
Plexi style amp in customer's Marshall box
FJA rack preamp
Rack preamp
FJA metal rack
Metal rack
FJA custom amp
Custom build
Ceriatone style build
Ceriatone-style build
Amp front
Front
Amp back
Back
Chassis front
Chassis — front
Chassis interior
Chassis — interior
Amp rear detail
Rear detail
Speaker
Speaker

Amp models

FJA FH100

Two channel, tube effects loop, 3 gain stages, EL34 power tubes. Optional 6L6, 6550, or KT88. Solo boost on gain channel; added gain stage available.

FJA JFD100

FJA version of the AFD100 / SIR #39 used by Slash, George Lynch, and many LA players. Two channel, tube effects loop, 4 gain stages, EL34. Optional tube types and solo boost.

FJA FJ100

One channel Jose-type circuit, tube effects loop, 3 gain stages, EL34. Optional 6L6, 6550, KT88; solo boost; clean channel option.

FJA FML100

Two channel high-gain based on Elan/Metalhead-type tones, tube effects loop, EL34. Optional tube types and solo boost.

FJA FB100

Brutal two channel metal amp — Aldrich-type tones. Tube effects loop, clean channel with separate tone control. EL34 standard; 6L6, 6550, KT88 optional; solo boost available.

Prices are a starting point — many options affect final cost. Confirm before ordering.

Custom amp pricing

FJA custom built FB100 2 channel w/ loop$5995 and up
FJA custom built FH100 2 channel w/ loop$5995 and up
FJA custom built FML100 2 channel w/ loop$5995 and up
FJA custom built FB/FJ 2 channel w/ loop$6995 and up
FJA custom built FJ100 single channel$5295 and up
FJA custom built JFD100 2 channel w/ loop$5995 and up
FJA custom built Plexi style amp$4995 and up
FJA custom built Bassman 4×10 style combo$6995 and up
FJA custom built tube reverb (rack mount)$2495
FJA custom rack preamp$3995 and up

Option pricing

Mercury Magnetics output transformerEmail for pricing
KT88 power tubes$240 (50W) / $480 (100W)
Depth mod$95
Tube effects loop$395 and up
Second master volume / solo boost (foot switchable)$395
Add 2nd channel$495 and up
Post phase inverter master volume$175

Email Jerry ← All products