Two Identical Amps-Two Identical Cabs Rig

[EastCoastThump]

Yeah I didn't think it would work that way either. I've got the manual right here and was actually looking at it after he posted the idea.

Perhaps he thought the amp has an effects loop and the post preamp signal would be clean and then go from the effects out into a boost or overdrive pedal, then back into the effects return ?

Yeah, I was getting that from a review at PremierGuitar.com:

You can run both DIs at the same time—one clean and one dirty. You don’t have to have a splitter to lay down one clean take while you are using the amp to saturate tone. Whether you’d like to blend the signal or need to fix something later on the clean track, the option is there. Pretty killer.​

I couldn't even make out from the photo in the review that the 2nd DI is a (labeled) line out. I shoulda just looked at Ampeg's block diagram; you see now why TB advice is offered at no charge.

You *could* run the line out into line-level FX. Something like the Helix LT would probably be cheaper than a second PF50T rig, easier to set up, and consistent from venue to venue. But whether it would sound satisfyingly comparable is up for grabs, even if you'd have it running a custom IR of your Ampeg rig.

 

[lowplaces]

Yeah, I was getting that from a review at PremierGuitar.com:

You can run both DIs at the same time—one clean and one dirty. You don’t have to have a splitter to lay down one clean take while you are using the amp to saturate tone. Whether you’d like to blend the signal or need to fix something later on the clean track, the option is there. Pretty killer.​

I couldn't even make out from the photo in the review that the 2nd DI is a (labeled) line out. I shoulda just looked at Ampeg's block diagram; you see now why TB advice is offered at no charge.

You *could* run the line out into line-level FX. Something like the Helix LT would probably be cheaper than a second PF50T rig, easier to set up, and consistent from venue to venue. But whether it would sound satisfyingly comparable is up for grabs, even if you'd have it running a custom IR of your Ampeg rig.

Ok, good enough. No biggie.

Perhaps down the line after my warranty runs out I could always look into adding an effects loop on the amp. That may allow a post pre DI out clean and use a dirt pedal in the effects loop for the Transformer DI out. (If even that would work .. I have no idea)

 

[JimmyM]

Thanks for sharing your thoughts and experience with trying those configurations.

The the text of your post I quoted has my interest, but I'm not sure how to achieve sending a clean signal from one DI and a pushed one from the other.

Maybe run the first one pre, then use the transformer DI pushed? Don't know, haven't tried it.

 

[lowplaces]

Maybe run the first one pre, then use the transformer DI pushed? Don't know, haven't tried it.

I don't know either. Unless I'm missing something I don't know how to push the power tubes without a boost in an effects loop.

derrico1 offered a suggestion of a possible way but I'm not familiar with the devices he mentioned. I can't see spending money on something that might work or might not. If I was only going to run one head, I just have to settle for clean or dirt via my MXR CAE. I couldn't have both at the same time without two heads.

 

[Munjibunga]

Thanks for the reply,
Could you elaborate on the phase issues ?

Subs apart.

Subs together.

 

[lowplaces]

Subs apart.
View attachment 1153773

Subs together.
View attachment 1153774

Thanks but I'm not sure how to interpret such. I've got a lot to learn about frequency spectrums.

 

[lowplaces]

If you would point me to a link that would get me started in understanding the more technical stuff I'm willing to put in the effort and time to understand it.

 

[JimmyM]

Thanks but I'm not sure how to interpret such. I've got a lot to learn about frequency spectrums.

Ever walk a room where the bass is really strong in one part of the room but you move a foot or two and it disappears? That's what he's talking about.

 

[lowplaces]

Ever walk a room where the bass is really strong in one part of the room but you move a foot or two and it disappears? That's what he's talking about.

Ok, I see.

 

[lowplaces]

So with the speaker cabs stacked, there is less likelihood of hearing the difference as you move around. From looking at those graphs and your example that's what I'm thinking anyway.

 

[JimmyM]

So with the speaker cabs stacked, there is less likelihood of hearing the difference as you move around. From looking at those graphs and your example that's what I'm thinking anyway.

Correct. However, it is not the only thing that can cause it. Room reflections can also cause it. But I've always found it best to try and mitigate that kind of stuff as much as possible, and I subscribe to the stacking thing as well.

 

[lowplaces]

Correct. However, it is not the only thing that can cause it. Room reflections can also cause it. But I've always found it best to try and mitigate that kind of stuff as much as possible, and I subscribe to the stacking thing as well.

Ok then, if stacking is the deal as a rule I'll just go that route.

 

[Munjibunga]

I'd get a single cab twice as big and a single amp twice as powerful. I don't want to be lugging any more gear than necessary.

 

[Munjibunga]

Thanks but I'm not sure how to interpret such. I've got a lot to learn about frequency spectrums.

Well, where you see red and yellow the sound is loud. Where you see blue the volume is much lower. So the top diagram shows what happens at 50 and 100Hz when the cabs are separated by 26 feet. The bottom diagram shows what happens when the cabs are less than 3.3 feet (¼-wavelength) apart. The bottom is what you want. Stacked is best.

 

[lowplaces]

I'd get a single cab twice as big and a single amp twice as powerful. I don't want to be lugging any more gear than necessary.

Well, weight-wise, a V-4B and a 212 cab would weigh more than two 50T's and my 112 cabs. Depending on the cabinet it would be not much more to a noticeable amount more.

I'm just happy with the little Ampegs.

 

[lowplaces]

Well, where you see red and yellow the sound is loud. Where you see blue the volume is much lower. So the top diagram shows what happens at 50 and 100Hz when the cabs are separated by 26 feet. The bottom diagram shows what happens when the cabs are less than 3.3 feet (¼-wavelength) apart. The bottom is what you want. Stacked is best.

Ok, cool. Thanks. Now that you have describe the color as it relates to the pattern it's making it easier to see what it's showing. Jimmy's example helped as well understand what I'm looking at.

I'm interested in this stuff, just need to study up on it.

 

[Munjibunga]

If you would point me to a link that would get me started in understanding the more technical stuff I'm willing to put in the effort and time to understand it.

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[JimmyM]

Well, weight-wise, a V-4B and a 212 cab would weigh more than two 50T's and my 112 cabs. Depending on the cabinet it would be not much more to a noticeable amount more.

I'm just happy with the little Ampegs.

Nothing wrong with that

 

[lowplaces]

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Good deal I'll check it out !

 

[lowplaces]

Nothing wrong with that

Now why does it not surprise me you would say that ?

I think I told you awhile back I should have listened to you about a year ago before I bought that horrid.... other thing that was about five tubes short