Adding Clean channel to AX84 P1-Ex

rwalkerphl · 3rd August 2010, 02:50 PM

Hi All,

I have an AX84 P1-Ex built and running great. I am now in the process of building some stom boxes for fun. My problem is that with the P1-Ex, if the gain is turned down to get a clean signal, there isn't a great deal of volume. I am thinking about adding a separate preamp to run as the clean channel.

Being a novice (I can build, but have not enough knowhow on designing yet), can anyone give me some ideas about how to achieve this? Can I add a separate preamp to switch to for clean? Could it be something like a simple solid state?

Many thanks,
Robin.

Cassiel · 3rd August 2010, 04:47 PM

Hi Robin,

It won't work. The SE EL84 guitar amp wasn't designed for loud clean sounds. Your only choice is to buy a high sensitivity speaker (no less than 100dB/m) or plug it into a 4x12 cab.

Cassiel · 3rd August 2010, 05:24 PM

A feedback loop will also help but not much, copy the second gain stage from the Champ 5F1 schematic.

3rd August 2010, 02:50 PM	#1
rwalkerphl diyAudio Member Join Date: Apr 2010	Adding Clean channel to AX84 P1-Ex Hi All, I have an AX84 P1-Ex built and running great. I am now in the process of building some stom boxes for fun. My problem is that with the P1-Ex, if the gain is turned down to get a clean signal, there isn't a great deal of volume. I am thinking about adding a separate preamp to run as the clean channel. Being a novice (I can build, but have not enough knowhow on designing yet), can anyone give me some ideas about how to achieve this? Can I add a separate preamp to switch to for clean? Could it be something like a simple solid state? Many thanks, Robin.

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3rd August 2010, 04:47 PM	#2
Cassiel diyAudio Member Join Date: Sep 2004 Location: Madrid	Hi Robin, It won't work. The SE EL84 guitar amp wasn't designed for loud clean sounds. Your only choice is to buy a high sensitivity speaker (no less than 100dB/m) or plug it into a 4x12 cab.

3rd August 2010, 05:24 PM	#3
Cassiel diyAudio Member Join Date: Sep 2004 Location: Madrid	A feedback loop will also help but not much, copy the second gain stage from the Champ 5F1 schematic.

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