5e3 Demo with Negative Feedback Circuit Hack

Описание: Custom 5E3 "tweed deluxe" with Fluxtone "American Vintage" speaker. SM57 on speaker and a large diaphragm condenser mic overhead (panned left and right). Very light touch of digital spring reverb FX before amp. No other audio effects or post processing.

Amp has been modified with a negative feedback toggle control switch. First 75% of the video I didn't realize that the negative feedback was on, then I went to turn it off, which really turned it on, which in turn got me a little excited with the increased low end and raw overdrive that comes from the stock 5E3 circuit.

Fluxtone speaker is an expensive feature but it does actually tame the volume without changing the roar so that it can actually be played in a domestic environment instead of being like a top fuel dragster in a school zone (where all you can do is let it idle, if that).
Total package is an awesome vintage sounding rig that could be used for just about any gig.
Fluxtone speaker uses a variable strength "field coil" electromagnet instead of the normal permanent magnet used with most speakers. A voltage regulator circuit allows the speaker sensitivity to be adjusted by more than 20db without affecting tone. The normal external controller from Fluxtone was gutted and the electronics were integrated within the 5E3 chassis with the magnet strength potentiometer replacing the normal ground/standby switch.
The speaker is analogous to a high performance motor - even though smaller than some motors (lower wattage), it produces more power (decibels) which is the thing that guitar players crave...and everybody loves a sleeper.

Cabinet and parts of from Mojotone with numerous upgrades. Pre-amp tubes are shock mounted. Carbon comp resistor upgrades. Turret board instead of vintage fiberboard.

Compared to Champ style 5F1 circuit with half the wattage, the 5E3 has this nice warm bottom end full of molten lava distortion, and a lot more volume from those 15 watts. With a speaker capable of 102db (1w@1m) sensitivity that's still way louder than a 87db sensitivity 200w home stereo speaker full out.
Standard Jensen/Weber sensitivity is around 97db, so that makes it comparable to a 50w Jensen/Weber amp.

I had no idea what I was going to play.. almost blanked out at first but just had fun with it and jammed a bit. Enjoy.