Highest efficiency woofer for sealed enclosure

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Defo

Member
Joined 2008
Hi!

I am looking for the highest efficiency woofer for use in a 65 liter enclosure with extension down to about 45 Hz -6 db.

Best I've found so far are the Peerless SLS 12 which is 90 db/w.
Are there any other good candidates? Possibly with even higher efficiency?
 
freddi

freddi

Member
Joined 2005
here's a Dayton 15 in a 3rd order 65 liter box. The amp has to have low output impedance and capacitor low losses.

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Patrick Bateman

Patrick Bateman

Member
Joined 2006
Defo said:
Hi!

I am looking for the highest efficiency woofer for use in a 65 liter enclosure with extension down to about 45 Hz -6 db.

Best I've found so far are the Peerless SLS 12 which is 90 db/w.
Are there any other good candidates? Possibly with even higher efficiency?
Click to expand...

If your primary goal is efficiency, arrays are the way to go. For instance, a pair of B&C 10NLW64-16 will give you and efficiency of close to 100dB when wired in parallel for an 8ohm load.

Speaker B&C Speakers 10NDL64, 16 ohm, 10 inch

Keep in mind that output is dictated by displacement, not efficiency, and if output is your goal, efficiency is kinda irrelevant. The only reasonable time to obsess over efficiency is if you have limited amounts of power.
 
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Defo

Member
Joined 2008
freddi said:
the 65 liter closed box (40-ish Hz :D) WINNER ! (?) = Two Large Advent woofers in parallel , 2V drive, 1100uF series capacitor

that cheap Peavey 15 is really light at 5.4lb

(Eg for the other speakers = 2.83v)
Click to expand...

That Peavey 15 looks very interesting indeed! Thanks for that

Patrick Bateman said:
If your primary goal is efficiency, arrays are the way to go. For instance, a pair of B&C 10NLW64-16 will give you and efficiency of close to 100dB when wired in parallel for an 8ohm load.
Click to expand...

I reckon I won't get away with 65 liter sealed then? :D

Patrick Bateman said:
Keep in mind that output is dictated by displacement, not efficiency, and if output is your goal, efficiency is kinda irrelevant. The only reasonable time to obsess over efficiency is if you have limited amounts of power.
Click to expand...

I'm a big fan of the sound characteristics of high efficiency speakers.
And the less power for a given SPL equals less distortion as well.
Which is probably why I like them. The sound is effortless.

digitalthor said:
The 15" I've tried, was the RS from Dayton Audio. Cant remember if it was the HO or HF version though.
Click to expand...

Thanks, I'll do some simulations between this one and the Peavey Pro 15 and see which comes out on top.
 
kazap

kazap

Member
Joined 2011
Defo said:
.... less power for a given SPL equals less distortion as well.
Click to expand...


Ive got a lot to learn. I wonder if you can help me understand how that works please?

I tired to see is there was any apparent correlation for 18" drivers HD measurements vs Sn using Data-Bass but couldn't really see anything with a quick glance. I was a bit surprised as the high Sn drivers look pricier and I expected they would perform better on HD.

Do low efficiency drivers sound worse when they heat up?
 
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Defo

Member
Joined 2008
kazap said:
Ive got a lot to learn. I wonder if you can help me understand how that works please?
Click to expand...

Obviously there are a lot more factors that play into this, but you can certainly say that distortion rises with input power.
Most amps also sound their best at low output.

kazap said:
I tired to see is there was any apparent correlation for 18" drivers HD measurements vs Sn using Data-Bass but couldn't really see anything with a quick glance. I was a bit surprised as the high Sn drivers look pricier and I expected they would perform better on HD.
Click to expand...

If HD measurements are all done at 1 watt, then there will be no difference.
Do the measurements at a given SPL, then that's another story.

kazap said:
Do low efficiency drivers sound worse when they heat up?
Click to expand...

Not sure how heat affects distortion, but I would imagine so?
 
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