Bridged amp and weird ohm speakers!

[Xprime4 10+ year member]

I'm about to buy new speakers for my front stage. Was thinking boston acoustic pro60's. Their impedance is 3ohm dual coil. what the hell does that mean? dual coil like subs? 1.5 or 6ohm at the amp?

Anyway, i'll be using an mb quart pa4100 amp.

http://www.sonicelectronix.com/item_9860_MB+Quart+Premium+PAB+4100.html

The amp is stable at 2ohm. Right now, it's bridged so i got 2x300watt rms

I'm using that to power entry cdt comp with tw25 tweeters with another crossover (the other want didn't like that much power) , but they get smelly sometime only after one minute at full tilt. Anyway, i'm looking for new comp.

Once it's bridged, the amp does get hotter than at 4x100watt rms. Specs says it's stable at 4ohm bridged, but will it work at 3ohm or whatever those speakers are?

Any other suggestion for high powered speaker along those lines? SQ is a must too!!! And how will the amp react at 3ohm? since it's stable at 2ohm unbridge i assume it could handle 3ohm bridged?

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[Xprime4 10+ year member]

I don't want to go active, at least for now!

 

[Lothar34 10+ year member]

If they do actually have dual coils, then they are dual 6ohm wired in parallel internally.

Your amp will see a 3ohm load. If it can handle 2ohms stereo then it probably can NOT handle 3ohms bridged. 2ohms stereo is the same as 4ohms bridged.

 

[wu501 10+ year member]

they are not dual coil...they are 3 ohm however.

 

[wu501 10+ year member]

and yes...as long as the amp is stable at 2 ohms then it will be perfectly fine at 3 ohms.

 

[Xprime4 10+ year member]

well one says yes, the other no...

the amp will stay bridge, i love the power i get from it. It never goes into protect otherwise. My electrical never get below 13.4

any other speakers with that can take that much power, that will get loud and sound as good as those boston acoustic's?

 

[Xprime4 10+ year member]

nobody ever bridged an amp to power those boston's? c'mon

 

[rollerdj 10+ year member]

well one says yes, the other no... the amp will stay bridge, i love the power i get from it. It never goes into protect otherwise. My electrical never get below 13.4

any other speakers with that can take that much power, that will get loud and sound as good as those boston acoustic's?

You got two answers becouse the were talking bout a little differnt stuff. The first one basicly stated that you could not put something at 3 ohms if it was only rated to go to 4. He just took the long way to get to the point.

 

[Lothar34 10+ year member]

nobody ever bridged an amp to power those boston's? c'mon

Look at your amp's manual. What load does it say it can handle when it's bridged?

 

[redfred18t 10+ year member]

nobody ever bridged an amp to power those boston's? c'mon

I asked on Sundown's forum if their 100.4 (the new revision comes out in a couple weeks) would handle 3 ohms bridged and Jacob, the owner, said it should be fine.

Hope this helps because I have the same set of components and it is aggravating. If I had a normal 4ohm component set, I could have decided on an amp that much quicker.

 

[Xprime4 10+ year member]

the manual state that thhie amp is bridgable at 4ohm, thenty nothing. I'm pretty sure 2ohm wouldn't work, but it's in the middle ... mb quart amp seems stable so far, haven't got any problem pushing it's 300x2. Never goes under protect, heat but not that much... if the sundown 4.100 work at 3ohm, i guess mine could too

 

[Xprime4 10+ year member]

bump for more answers...

I've sent a email to info@mbquart... don't know if they'll respond

anymore opinions/facts?//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[Lothar34 10+ year member]

the manual state that thhie amp is bridgable at 4ohm, thenty nothing. I'm pretty sure 2ohm wouldn't work, but it's in the middle ...

If they say it's 4-ohm stable, that generally means that anything under 4 ohms is not stable.

 

[thch 10+ year member]

more realistically it means things under 4ohm MAY not be stable.

its a numbers game. espeically if you get conservative raters who design for 3ohm because many component speakers are 3ohm at frequencies near the crossover. (4ohm or higher at others).

further, a sane approach can work wonders. the person who is worried about equipment damage might not do really dumb things like crank every knob on every piece of equipment they own and assume it'll work. (I've seen someone literally do this. LPF 500HZ, bass boost +18dB, bass boost freq 250Hz, SSF 100Hz, gain maxed. words cannot describe the result. except for a few ones like "bad")