Ohm Load and Tone

[JumpMarine]

I had an interesting experience with my amp the other night. It's been a couple of years since building this amp and I've always run it under an 8ohm load and it sounds incredible, warm and tight on the low end. I hooked up 2-8ohm cabs and switched to 4 ohm on the amp. The lowend got really flabby. I haven't tried it with a a 16ohm load yet, but would it be fair to say that it may be tighter sounding than 8ohm?

 

[Dr.Mavashi]

Re: Ohm Load and Tone

Hmmm ... strange .... I have an AOR it has 4, 8, 16 selector, my cab is JCM900 Marshall Doodoo, it has 8ohms as a stereo option, so I have not tried it, but Mono options are 16 and 4, and I much better like the 4 ohms option, precisesly for the low end bass, to my ears much tighter brighter bass. What power tubes do use?

 

[JumpMarine]

Re: Ohm Load and Tone

Hmmm ... strange .... I have an AOR it has 4, 8, 16 selector, my cab is JCM900 Marshall Doodoo, it has 8ohms as a stereo option, so I have not tried it, but Mono options are 16 and 4, and I much better like the 4 ohms option, precisesly for the low end bass, to my ears much tighter brighter bass. What power tubes do use?

I'm using JJ's that were selected for early breakup from Eurotubes. I was always under the impression that the lower the ohm load, the less the OT has to work. So I was expecting things to tighten up when I went to the 4 ohm load.

 

[kmcguitars]

Re: Ohm Load and Tone

I've found that running my Princeton Clone at 4 ohms sounds incredible.Aside from the fact I'm using a 2nd speaker ,The amp sounds much fuller with much tighter bass response. It also seems to transition into overdrive much smoother.It could also have something to do with what lug you have your NFB wire soldered to?

 

[JumpMarine]

Re: Ohm Load and Tone

It could also have something to do with what lug you have your NFB wire soldered to?

How so?

 

[Dr.Mavashi]

Re: Ohm Load and Tone

I've found that running my Princeton Clone at 4 ohms sounds incredible.Aside from the fact I'm using a 2nd speaker ,The amp sounds much fuller with much tighter bass response. It also seems to transition into overdrive much smoother.It could also have something to do with what lug you have your NFB wire soldered to?

Yept, thats my experience with 4 ohms, I get that kind of Soldano SLO grain and tightness with it ...

 

[kmcguitars]

Re: Ohm Load and Tone

How so?

I don't know the Techie answer,But it does affect the amps tone depending on what tap your NFB wire is soldered to. Hopefully Bruce or Jeff Seal can enlighten us? My 2204 is on on the 8 ohm tap,(as per George at Metro) While my Princeton clone goes on the 4 ohm tap?