Andrew Jones’s new speaker brand - Jones and Cerreta

[antisuck]

He talked a lot about high efficiency. I just don't understand all of the craze for high efficiency speakers as if we are still in the 50's with limited powered amps.

He's inviting low powered tube amp aficionados to the party, I'm thinking.

 

[PristineSound]

He's inviting low powered tube amp aficionados to the party, I'm thinking.

I think so. He's going all in on the retro look to go with the tube amps.

 

[RexrothPigeon]

If it wasn’t an ad, how do you think AJ’s explanation of his new speaker would be different?

I don't know, which is why I didn't add any commentary. But it is an ad, and people can make of that what they wish.

 

[RexrothPigeon]

He's inviting low powered tube amp aficionados to the party, I'm thinking.

The Cerretas, almost certainly the money behind this new business, are members of that demographic. Probably not a coincidence.

 

[Pearljam5000]

From their website

 

[Pearljam5000]

 

[tineared]

View attachment 522819
From their website

Good lord, someone open the windows!

 

[levimax]

I just don't understand all of the craze for high efficiency speakers as if we are still in the 50's with limited powered amps.

The "power is cheap so efficiency doesn't matter is a myth" . If you have 85 dB speakers, allow 10 dB headroom for DSP and want to play 105 dB peaks you will need 3,162 watts of power. It would be much easier if you started out with 95 dB speakers where you would only need 316 watts.

 

[Duke]

The "power is cheap so efficiency doesn't matter is a myth" . If you have 85 dB speakers, allow 10 dB headroom for DSP and want to play 105 dB peaks you will need 3,162 watts of power. It would be much easier if you started out with 95 dB speakers where you would only need 316 watts.

That's more math than I can do in my head, especially not knowing what your assumptions are (listening distance, contribution of reflections, number of speakers, whatever else). You mentioned 10 dB for DSP - are you assuming 10 dB of bass boost, or something like that?

Can you walk us through how you arrived at that 3,162 watt figure for 85 dB speakers to hit 105 dB peaks? At first glance that number seems high, but it may well be reasonable (or even conservative, if thermal compression is factored in!). Like I said, that's more math than I can do in my head.

Thanks!

 

[MarkS]

We need a betting pool on the price.

I got dibs on $28K/pair

 

[levimax]

QUOTE="Duke, post: 2562884, member: 98"

Can you walk us through how you arrived at that 3,162 watt figure for 85 dB speakers to hit 105 dB peaks? At first glance that number seems high, but it may well be reasonable (or even conservative, if thermal compression is factored in!). Like I said, that's more math than I can do in my head.

Thanks!

[/QUOTE]

105 dB- 75DB = 35 dB which is 3,262 X 1 watt. It is conservative with 10 dB DSP headroom but not crazy. It also assumes 1 meter which cuts the other way. The main point is if you start out with ineffecient speakers and DSP you can't really get to 105 dB+ even with "cheap power".

 

[Bwaslo]

How exactly does dsp lose 10dB?

 

[Duke]

105 dB- 75DB = 35 dB which is 3,262 X 1 watt. It is conservative with 10 dB DSP headroom but not crazy. It also assumes 1 meter which cuts the other way. The main point is if you start out with ineffecient speakers and DSP you can't really get to 105 dB+ even with "cheap power".

Thank you.

I get 105dB - 75dB = 30 dB, which would be 1000 watts.

BUT I agree with you in principle!

 

[levimax]

Thank you.

I get 105dB - 75dB = 30 dB, which would be 1000 watts.

BUT I agree with you in principle!

Your right....I originally had 110 dB peaks but figured it might be a little extreme so reduced to 105 dB but didn't change total

 

[Duke]

Your right....I originally had 110 dB peaks but figured it might be a little extreme so reduced to 105 dB but didn't change total

Well I still agree with the point you make about the dynamic limitations of relatively low efficiency loudspeakers. Ten dB more efficiency is HUGE when you want to hit 105 or 110 dB peaks.

 

[Mnyb]

Hmm you generally don’t fill the dips with DSP only reduce peaks , I do,lift some of the bass 2,5 dB .

but the number is close .

Each LS60 has 700 watts each of my KC92 sub has 1000 watts 1400 per channel 3200w total

 

[Vladimir Filevski]

The "power is cheap so efficiency doesn't matter is a myth" . If you have 85 dB speakers, allow 10 dB headroom for DSP and want to play 105 dB peaks you will need 3,162 watts of power. It would be much easier if you started out with 95 dB speakers where you would only need 316 watts.

85 dB/1W/1m loudspeaker is below average efficiency. Take loudspeaker with average 87 dB/1W/1m efficiency. Then calculate 105-87=18dB, so for SPL=105 dB/1m we need just 64W.
10 dB headroom for DSP??? Pease explain why and how DSP is eating 10 dB?! And what if we don't have DSP or don't want to use DSP?

 

[Sokel]

What kind of W, also matters.

I tested Golden Ear Triton R here once (I have a sweet spot for semi-actives) , they claim 93dB efficiency ( I doubt it for across the spectrum) , they are 1,5 meters tall (but thin), have 1000W subs embedded to them, etc.

Powered them with 2 x 1200as (icepower) monos.

Not the thunder one would expect. Lots of fun though, and a bargain for what they are.

 

[Sokel]

85 dB/1W/1m loudspeaker is below average efficiency. Take loudspeaker with average 87 dB/1W/1m efficiency. Then calculate 105-87=18dB, so for SPL=105 dB/1m we need just 64W.
10 dB headroom for DSP??? Pease explain why and how DSP is eating 10 dB?! And what if we don't have DSP or don't want to use DSP?

Here's an example:

GSonic Reference – Free Stereo Room Correction Tool (Measurement + FIR Export)

Any recommendations how I could use these filters on MacOS w Apple Music? One option would be to use MConvolutionEZ (free AU plugin) hosted within SoundSource (paid). Within SoundSource you would add MConvolutionEZ to the Apple Music to host the stereo version of GSonic's filter results. I'm...

www.audiosciencereview.com

(RG is also DSP)

 

[Vladimir Filevski]

What kind of W, also matters.

The kind of which Mr. Ohm described 200 years ago: P=UI

I tested Golden Ear Triton R here once (I have a sweet spot for semi-actives) , they claim 93dB efficiency ( I doubt it for across the spectrum) ,

Measured efficiency (by SoundStage Hi-Fi) is 90 dB, not 93 dB:

Here's an example:

No, it is an example of gain reduction, not power reduction!
Quote from your link:
"And dito re: gain. I mentioned already that I'm using replay gain tags for my music, which sometimes steal as much as 10db of headroom in my musicbee player for some ungodly reason. Thus, in order to achieve my desired volume levels, the peak gain of my left channel is currently sitting at 8.8db,"