yesterday effects defiant jazz preamp

meet defiant jazz, a legacy of clean tone in a package that's about 60 pounds lighter.

the roland jazz chorus 120 is one of the most celebrated and highly regarded solid state amplifiers ever created. what really set the jazz chorus apart in the world of solid state amplifiers is that it didn't attempt to sound tube-like, which was bold for the time. well known for its shimmering clean tone, the jazz chorus found its way onto countless classic records and situated itself into countless sound rigs. a careful study of the jc's preamp topology led to the creation of defiant jazz.

defiant jazz is a value for value, component for component recreation of the jc's clean channel (sans bright switch). four controls rule over the sound of defiant jazz: volume, treble, mid, and bass. an internal charge pump takes 9v from a standard, center negative power supply and steps it up to 36v; the original jc-120 stepped wall voltage down to 36v. since this circuit internally quadruples its input voltage it is crucial to use only 9v.

...it’s yesterday once more

features:

- pcb designed by yesterday effects.
- on board voltage charge pump.
- 125b enclosure.
- true bypass.
- compatible with standard negative center 9v adapters. run only at 9v!

handmade with love in the usa using hand picked and hand matched components of exceptional quality.

all product and brand names used in this webpage are trademarks of their respective owners, which are in no way associated or affiliated with yesterday effects. these trademarks of other manufacturers are used solely to identify the products of those manufacturers whose tones and sounds were studied during yesterday effects' sound model development. use of these names and brands does not imply endorsement.