Mike Soldano has done a great job designing this amp!
The Jet City JCA20 and JCA2112RC amps offer a beefy 20 watts. This loud, gig-worthy amp has a ton of gain and personality with separate PREAMP GAIN and MASTER VOLUME controls, a full 3-band tone stack, and a PRESENCE control.
TheBitMo Suframods work with both the head and combo versions, with and without reverb. While retaining the standard configuration, the mods solve some issues and add very useful features (controlled by 2 added front panel switches) which make the amp much more versatile. I have heard complaints that the amp lacks clean headroom and punch, and can get a bit fizzy. With these mods (and maybe changing a tube or 2) you can fix these issues and have a really great amp at a fantastic price!
With both switches off, you have the stock configuration.
The 1st switch adds loud clean headroom and punch by partially bypassing the congested M*style tone stack. This setting is great for those who like to use pedals.
The 2nd switch slathers on a dollop of fatback overdrive that can go from that famous BitMo chocolaty brown cello sound to a tight, biting boost. It is like having a Screamer-type overdrive in the middle of the gain structure.
The switches can be used separately or in combination providing very touch sensitive new voicings which are great across the full range of the gain control settings going from warm or sparkly clean to balzout overdrive with lots of interesting shades in between.
(I do recommend changing the V2 preamp tube to a 12AT7 or other lower gain tube and V1 to your 12AX7 flavor of choice.
This kit includes quality parts and detailed instruction with pictures.
It does not include the amp or additional tubes.
I have some great classic amps in my collection.
This is one adds unique higher-gain voicings.
Note: Based on requests from users, this kit now comes with mini toggle switches instead of the original pushbutton switches as pictured.
Assumptions, warnings, etc:
·While these modifications are very easy to do, you will void your warrantee.
·Tools needed: screwdriver, soldering iron, rosin core solder, wire stripper, needle nose pliers, drill and bits.
·Skills needed: be able to solder and drill a hole in the metal chassis.
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On Mar-01-10 at 12:35:40 PST, seller added the following information:
"20w jet city kit makes amp a keeper. voxy clean tone. thanks!!" - Happy customer feedback.