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Booming low notes, can't hear the high ones.

It may not be. I suspect that his cabs are electrically not in phase. One is moving in while the other is moving out.

This would have resulted in a lack of low end, not boom and mud.

I'm guessing the main problem is a lack of mids. That could be caused by a misunderstanding of how to set the eq controls "flat", or a faulty pre, or just a baked-in scoop that is part of this preamp's sound.
 
As already stated - no one EVER said it blow up, catch on fire, etc.

It can cause problems with peaks and drop outs in your sound, dead spots in venues, and yes - potential speaker failure.

This is not just conjecture, but supported by the many posts found on this forum that usually start off with "why did my 1X15 blow"

If you do some looking, there was even a thread started just yesterday from someone who came to the realization that his mixed rig was the source of sonic problems he was experiencing.

Please pardon my hyperbole. I have never experienced any of these grave consequences in many years of playing. Looking forward to finding out what the OP's problem stems from. I got no answers, just experience.
 
Please pardon my hyperbole. I have never experienced any of these grave consequences in many years of playing. Looking forward to finding out what the OP's problem stems from. I got no answers, just experience.

Same here.......................

Lots of potential problems:

Lack of understanding of the tone stack
Possible Preamp through other amp problems
Room problems
No testing of rig at gig volume prior to use
Possible mixed cab problem

Could be ANY single issue, or a "perfect storm" combination of all the above.

Looking forward to seeing how it turns out :confused:
 
The 4x10 on top of a 1x15 cab was probably first seen on Saturday Night Live or something like that, and the next day, a bunch of guys went to their local GC's and started buying that combo. And salesman will sell you anything so long as it doesn't start on fire. Seems like we are stuck with the 4x10 on top of the 1x15 regardless of the acoustical engineering principles against it.

That's why I put the 115 on top of the 410. It works way better that way and sets me apart from those SNL copycats. :hiding:
 
It may not be. I suspect that his cabs are electrically not in phase. One is moving in while the other is moving out.

That would only affect the frequencies produced by both- they would cancel, somewhat, but not totally. If the cabinets were faced toward each other, more of the sound would cancel but since the 115 doesn't do high frequencies, this isn't the case.
 
Those are both full range speakers..... :rollno:

Kind of. The 15" will roll off sooner at the upper end than the 410, which means the fact that the bass was all he could hear indicates that the speakers aren't canceling each other. The easy way to tell is to face them toward each other, but I have NEVER heard mids and highs cancel the way the OP makes it sound. Stacked, the sound doesn't cancel the way it would if they were facing each other- it would be more comb filtering, based on listening position.
 
I'd like the OP to use the new Peavey amp by itself, with each cabinet, then add the second. If the sound pukes, I would recommend measuring the DC resistance at the speaker plug end being inserted in the amp. If the DC resistance doubles to 16 Ohms, it means the speakers are in series and it's possible that the inductance of the drivers is acting as a LP filter, but we'd need to know the inductance of each driver to be sure.

I's also recommend using different speaker cables-one may have problems.
 
I'm the OP. With the touchy volume controls on the BMAX I'm thinking I, somehow, over drove the unit into my Tour 450's Amp. Keeping in mind that I bypassed the 450's preamp by plugging into the 450's effects return. Still haven't gotten to check everything out yet by just playing diferent combinations at " gig " volume. I'm going to take the Tour 450, the BMAX T, my Mark VI the Tour 115 and the Tour 410 to my sons garage this weekend. I know something wil work and I'll just put together the best tone I can with both speakers and individually. I'll keep y'all posted. Thanks so much for your time, consideration and help. It's really appreciated..

JW
 
I'm the OP. I'll keep y'all posted. Thanks so much for your time, consideration and help. It's really appreciated..

JW

It's so fun to read though an entire thread with lots of people helping out and it's even fun to read the different points of view.
BUT, to read all the way through 4 pages of a thread and to find there's still no reply from the OP in over 2 months is frustrating.
 
This ^

A hollow wooden stage will make your low notes bloom and resonate like that... this is made worse with PA subs near the stage and accentuated by a bad room

In this situation ( i had this on sat night) the only real options are to try raise your cabs off the floor and or to try find the guilty frequency range and cut it, leaving you with a rather thin sounding stage tone

and Seriously, I would consider all other options before blaming speaker size phasing between the different cabs and rushing out to buy new cabs

Use the bottom cab as a stand and just run with the top cab.

:bassist:
 
It's not just phasing issues that you have to face. The 15 cannot keep up with the 4x10 in any regard. it will always be a weak link in your chain.

I too really wanted the B Max T until I got one. I disliked the Fender style tone stack in every way. I was glad to pass it on to another TB member who wanted to try one out. I feel that using this unit to drive the FX return is very problematic. You still have the innate voicing from the heads power section. These don't have to be HiFi but voiced to suit the original designers goals.
 
There shouldn't be a problem running it into the Tour 450's effects return, which is a power-amp-in. I doubt whether there is any 'coloring' going on in the power section. It should be pretty much in = out, tone-wise.