AC4HW

[Cantplay]

Tried one on display. Very nice clean, and quite a bit of crunch cranked.

http://www.voxamps.com/handwired/ac4hw1/

12" Greenback in it. For my taste I'd like to swap in a blue.

Waiting for one to show up used.

John

[bolero]

curious, has anyone here modded one of the AC4TV's to sound better?

mine is great clean, but cranked up it doesn't give up the goods like a good vox....have been considering a HW but it can't be that difficult of a circuit to mod a bit?

[rock_mumbles]

curious, has anyone here modded one of the AC4TV's to sound better?

mine is great clean, but cranked up it doesn't give up the goods like a good vox....have been considering a HW but it can't be that difficult of a circuit to mod a bit?

I modded my brother's AC4TV to get rid of the fizzy tone when driven hard ... I don't remember exactly what I ended up doing though ...
More recently I've done a two tube TopBoost that's a pretty sweet amp, sounds good, it's pretty clean on it's own and takes an overdrive pedal well.

[headstack]

curious, has anyone here modded one of the AC4TV's to sound better?

mine is great clean, but cranked up it doesn't give up the goods like a good vox....have been considering a HW but it can't be that difficult of a circuit to mod a bit?

I just did the Murcury Magnetics Studio Pro Upgrade.

Not sure I would call it a mod as much as a redesign.

There are several things that will help it along before gutting it

Adding a choke, adding screen resistors, running it with an 8ohm speaker and either upping the resistors on the power scaling board to 10 watters, or yanking the power scaling board and installing the Hall Amplification VVR master volume.

There are also tweaks for the tone control, and a few other quickies that are just swapping values in the original circuit that make a pleasing change.

Adding the screen resistors and running it at 8 ohms will go a long way towards giving you more headroom and helping rid the fizzy clipping.

If you do this, remember to uprate the resistors on the power scaling board, because the amp will be running around 9-10 watts and will cook the 5 watt resistors that are there.