Please Help

[ryanosaur]

Fun with numbers:
For an 87dB sensitivity speaker to hit dynamic peaks of 120 dB @1m, you would need 2048w. To get to the LP about 9 feet away at ~120dB, assuming some room gain, you would need to get another ~6dB out of the system, still, requiring around 8192w to get that 120dB at an average listening position.

Now, say you have a 97dB sensitivity speaker. Still accounting for some boundary reinforcement in-room, you would require 1024w to get you to that 120dB at an approximately average LP.

Comments about hearing aside...

Maybe Eric at Tekton is the guy you should talk to, or buying Pro Audio gear. I don't think those B&Ws will melt, so much as they will explode like the Death Star. Definitely wear eye and ear protection when you do manage to connect any amps capable of the over 8000w of power per channel to those!

Oh, and don't forget to youtube that sh!t and link us in.!

 

[Bucknekked]

Yeah pretty sure those B&W’s would melt down. Maybe this would do it?

I was thinking about just such a solution last night. If one really wants to hit concert level volumes, then why not use a slice of what the pros use to achieve that. Speakers made for the purpose and amps that are used to running hard. I think we're starting to get a solution here.

Now we need some rigging and some scaffolding and we're nearly there. Oh, and dont forget the paramedics for when the OP actually hits 120db in his living room and gets completely disoriented by the loss of spatial cues from his ears being blown up. A total solution is always better than trying to freelance something.

 

[ryanosaur]

For our OP... Also consider JTR for new speakers. The Noesis215RT should do you right. Perhaps you are into the DIY game, in which case there are the Elusive 1099 or Aggressive 1299 speakers (both currently out of stock).

I would recommend looking at either the Crown XLS Amps, or the QSC Amps.

Also, Get an electrician to install some dedicated power for your rig. Chances are you won't be using >8000w per channel, but the JTRs claim up to 2000w of amplification... 2000w on a 120v line is 16.667 amps... per channel. (Or 8.333 on a 220v line.)

If you're gonna do it, do it right.

 

[Auditor55]

That guy was just trolling us.

 

[ryanosaur]

That guy was just trolling us.

Maybe/maybe not. *shrugs His ears if he's sincere. If not, some good info here for posterity: people may be able to see we didn't flame him (too hard) and that we did give some solutions.

 

[Pogre]

Maybe/maybe not. *shrugs His ears if he's sincere. If not, some good info here for posterity: people may be able to see we didn't flame him (too hard) and that we did give some solutions.

Not to mention I think it'll be fun to build a system that can do it! There's now a direction established, a few speaker suggestions, a couple of amplification suggestions and electrical advice. We've made some ground here. Let's get the speakers sorted and pick a set that will do it and sound good doing it!

I haven't done much research for anything like this but I've heard about and done some reading on JTR speakers and they look like they'll have the balls to do it. The set you suggested have 95 dB sensitivity and can handle up to 2000 watts. With an amp capable of that he could hit a clean 120 dB (with a little less than 700w) from 9' away with a pair of them.

I've read reviews that they're not only loud, but the sound is pretty amazing and they measure well. We need a couple of big 2000w monoblocks to drive 'em now. This is over my head guys. We need suggestions and discussion!

 

[ryanosaur]

I think QSC cinema amps in bridged mono will work fine.
https://www.qsc.com/cinema/products/power-amplifiers/dca-series/dca-2422/

 

[Auditor55]

Maybe/maybe not. *shrugs His ears if he's sincere. If not, some good info here for posterity: people may be able to see we didn't flame him (too hard) and that we did give some solutions.

The 120 dbs from 9 feet, come on!

 

[Pogre]

I think QSC cinema amps in bridged mono will work fine.
https://www.qsc.com/cinema/products/power-amplifiers/dca-series/dca-2422/

I like it! 2 of those will be more than capable. Easy to place and cooler running too.

So, 2 QSC DCA 2422 power amps in bridged mono driving a pair or Noesis 215RTs. Will a good receiver be able to send a strong enough signal to those amps? Pro gear doesn't always play well with consumer electronics.

 

[Verdinut]

So, 2 QSC DCA 2422 power amps in bridged mono driving a pair or Noesis 215RTs. Will a good receiver be able to send a strong enough signal to those amps? Pro gear doesn't always play well with consumer electronics.

Matching problems can occur when you're trying to drive an audiophile power amp with a pro audio high level source, but it's seldom the case when you're using an audiophile preamp to drive a pro audio power amplifier.
There is no problem driving those amps. The DCA 2422 will require 1.5v to reach its full rated power with an 8 ohm load, or only 1.3v for a 4 ohm load.

What is also good about the QSC DCA series of amps, I am using four of them, they are built like tanks you can't kill them. The QSC power amps are about the only ones that you can't blow up.

 

[ryanosaur]

I like it! 2 of those will be more than capable. Easy to place and cooler running too.

So, 2 QSC DCA 2422 power amps in bridged mono driving a pair or Noesis 215RTs. Will a good receiver be able to send a strong enough signal to those amps? Pro gear doesn't always play well with consumer electronics.

I remember @everettT was using the QSC Cinemas with his Salk Veracitys.

If you're still out there buddy, I Hope all is well!!!

Regardless, the input sensitivity is pretty much in line with what a Marantz or Denon should deliver.