If I were to....

[hispls 5,000+ posts]

I completely agree with the impedance rise and lesser power on music. However, the amps continually get more efficient as impedance rises, so I wouldn't expect that large of a drop in power except on your loudest notes. Stuff below and above tuning may see numbers within an ohm of nominal ratings. If he was talking clamped power on music, then I would be interested to see what it would take to maintain voltage as well.

Exactly, though depending on the sub(s) and box you may well see double your nominal impedance from 30-70hz, I have personally seen close to this. I suspect if he means that much clamped power he's talking about say a 10K amp per coil.

This is what I was asking about earlier. Without some sort of ultra high excursion, I don't understand the advantage of using that much power to a single driver. I understand that I may not know the physics behind "getting loud" entirely, but isn't the point to move as much air as possible?

Where it really comes into play is 50hz and up where you run into thermal limits way before mechanical, particularly in larger drivers. Ever see a guy burping 160's in mid 60hz range?

 

[Mitch86 5,000+ posts]

Correct me if I'm wrong, but if you have the space for 10+ huge batteries to power 12-15k worth of huge *** amps...then you most likely have room for a few more woofers... I like both multiple woofer and single bad *** woofer set ups.. but it takes room to run 10-15k clamped, even on 1 sub.

 

[Montana]

nah. cuz honestly, 12-15kw at 1 woofer, versus 3-4kw against 4 woofers.. the spread power would be much louder.

No sir, 15k at 4 woofers, I roll 60k RMS daily.

 

[knotdrummer88 10+ year member]

No sir, 15k at 4 woofers, I roll 60k RMS daily.

your sig makes me giggle

 

[wickedwitt 10+ year member]

Exactly, though depending on the sub(s) and box you may well see double your nominal impedance from 30-70hz, I have personally seen close to this. I suspect if he means that much clamped power he's talking about say a 10K amp per coil.


Where it really comes into play is 50hz and up where you run into thermal limits way before mechanical, particularly in larger drivers. Ever see a guy burping 160's in mid 60hz range?

Yes indeed. That 1/4" movement isn't exactly wonderful for cooling. You see people burping that, but just like you said, it is a burp. That note isn't played longer than 1 second. Usually, those guys have plenty of spare woofers on hand because they are smoking VCs.

 

[Wingman0121 10+ year member]

I think this is an idea that's going to die in the womb.

 

[snoopdan 5,000+ posts]

I think this is an idea that's going to die in the womb.

how so?

 

[Wingman0121 10+ year member]

how so?

Is the sub going to be able to move enough air to justify the massive power handling? In other words, is it going to be better than spreading 15,000 watts to say, four or more individual subs? I mean the MTX Jackhammer can handle a buttload of power but it isn't necessarily louder than 4 15s or similar setups due to inefficiency, plus it is over 300 lbs and it is impractical. I remember once there was a 22" "quadra sub", I forgot the exact name but it's a red square sub with four separate voice coils and 4 magnets all attached to the same cone and the company said that sub was able to take 20,000 watts RMS or something crazy, but it never made it into production and I don't even know if the company is still in business.

Basically you'll need to figure out if this prototype sub can justify its massive power handling (which is your 1st goal) by being able to back up its power requirements with equally impressive performance. If not then it is just going to be another statement piece.

 

[snoopdan 5,000+ posts]

I remember the quadra sub, circa 2005. Don't remember what company.

I don't run a company, i'll be just making a few at first to prove concept.