Grateful Dead Music Forum

I took out my HRD head today and had it going thu my JBL e-120 2x12 cab. With the RCA tubes and some of the mods ive done this amp sounds saweet. Has its own thing going on, would take it with me as a back up knowing itd be able to do what I need it to do tone wise. Its def not a Twin by any means, but with the right mods done its pretty sweet. Too bad out of the box these dont sound like this. The one I have is USA made, it was originally a 2x12 combo. I still replaced just about everything in it when I did the mods and what not years ago, but the newer ones use really cheap stuff. So if ya get a new one or a used one, save yourself the future hassle and just bring it in to a tech and have him take care of it right away.

Darkstar860 wrote: ↑Wed May 25, 2022 5:15 pm I took out my HRD head today and had it going thu my JBL e-120 2x12 cab. With the RCA tubes and some of the mods ive done this amp sounds saweet. Has its own thing going on, would take it with me as a back up knowing itd be able to do what I need it to do tone wise. Its def not a Twin by any means, but with the right mods done its pretty sweet. Too bad out of the box these dont sound like this. The one I have is USA made, it was originally a 2x12 combo. I still replaced just about everything in it when I did the mods and what not years ago, but the newer ones use really cheap stuff. So if ya get a new one or a used one, save yourself the future hassle and just bring it in to a tech and have him take care of it right away.

old thread I know....what mods did you do?

Plug into the FX loop input and skip the preamp. Thats how i was able to get the snap i needed to do Jerry stuff. I really have a hate and love relationship with these amps.

Theres a mod called the TWIN mod. Its easy and just look it up and if your plugging directly into the input, this will give your mids a MUCH nicer tone than stock. Requires very little work. A small peice of wire soldered to the back of the mid pot. Without doing this, this amp will drive ya wild trying to get that tone.

The Frommel mods are great for that amp. Also, better tubes, properly biased, and a speaker upgrade. JBL’s or the EV12L. Stock, it sounds like bass heavy cardboard crap.