As per a post from a couple of months back, I converted an AC30 1x12 into an AC15 by just re-wiring the bias scheme to work with 2 x el84s, and replacing the GZ34 with a 5v4 to combat the rise in voltages that the reduced B+ current draw produced. That meant I could put a single Celestion Blue in the cab.
And honestly, I'm really happy with the result. It's been perfect at band practices and lets me run it right in the edge-of-breakup, clean but compressed place that Voxes excel at.
The only thing I'd like to change is in tightening up a little flub in the bass end as it starts overdriving - comparatively it feels like the bass is more loose than when it was an AC30, or in comparison to my AC30 2x12 with two blues.
My two thoughts are
- Smaller output transformer, since at the moment it's 15 watts going into a 30 watt transformer. On paper I quite like the idea of the slightly saturating output transformer, and if that reduces the sub energy and maybe focuses things into the mids a little at high volume it'd do it for me.
- Smaller coupling caps. Obviously way cheaper, but price isn't an issue to get the sound right. At the moment it's 0.047 before the PI and 0.1 after, I was thinking of reducing the ones after the PI to 0.022 and seeing how that works.
My gut feeling is a smaller OT might be the ticket, because if that would cut sub bass a few DB then the low end would stay deeper and full when it's not being pushed, which I like, and only tighten up/ focus in on the mids more when pushed, which is where the flub starts to come in.
Anyway, thoughts welcome!
Topic: Tighten up some flub on a half-power AC30? (Read 1737 times)