Ok, Some 16 years ago when I had the age of 16 and had no Idea about T/S specs of a speaker I got these 15" speakers for not to much money.
I used them in a BR enclosure I had build using online plans but tuning etc.....I didn't know.
It worked "OK" but wasn't perfect either.
So I still have these woofers lying around and was wondering what to do with them......
I recently got me a DATS measuring device so first thing I did was measure the T/S parameters.
This is what I got.
Re:7.691ohm
Fs:40.38Hz
Qts:0.8199
Qes:0.9743
Qms:5.174
Le:1.183mH
Mms:132.4g
Vas:135.8L
SPL:91.52
So looking at these they are a little strange. Qts is rather high.
Even for use in a closed box.
So what would you guys recommend when using this woofer?
Maybe I could do a little experimenting with MFB.....?
They are said to handle 400w but It's a little optimistic I think.
I used them in a BR enclosure I had build using online plans but tuning etc.....I didn't know.
It worked "OK" but wasn't perfect either.
So I still have these woofers lying around and was wondering what to do with them......
I recently got me a DATS measuring device so first thing I did was measure the T/S parameters.
This is what I got.
Re:7.691ohm
Fs:40.38Hz
Qts:0.8199
Qes:0.9743
Qms:5.174
Le:1.183mH
Mms:132.4g
Vas:135.8L
SPL:91.52
So looking at these they are a little strange. Qts is rather high.
Even for use in a closed box.
So what would you guys recommend when using this woofer?
Maybe I could do a little experimenting with MFB.....?
They are said to handle 400w but It's a little optimistic I think.
I think they would make dandy OB helper woofers. With a decent size baffle (not huge) They should do nicely down to the low E on a bass guitar and a bit lower. Another possibility would be as part of an in-wall (i.e. infinite baffle) setup just don't expect true subwoofer output levels; Good for the mains though.
Some sealed sims...
Red line is about 10 ft^3 while grey line is about 14 1/2 ft^3.
A true infinite baffle (rear of driver exhausts into the next room)...
You could try an aperiodic vent too.
Some sealed sims...
Red line is about 10 ft^3 while grey line is about 14 1/2 ft^3.
A true infinite baffle (rear of driver exhausts into the next room)...
You could try an aperiodic vent too.
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At higher power levels, the effective value will be a bit lower.I recently got me a DATS measuring device so first thing I did was measure the T/S parameters.
[...]
So looking at these they are a little strange. Qts is rather high.
Even for use in a closed box.
I had a (prebuilt) ported sub with a similarly high Q driver. The FR plot was "M" shaped. Still sounded OK if used <80Hz.
Bjorno's suggestion looks like a lot of bass / bang for the buck.So what would you guys recommend when using this woofer?
What other gear do you have? Other posts imply that you have a measuring mic & EQ, so you'd be able to tweak a complex build.
After such a long time, the suspension will stiffen up. Wobble it at it´s resonance frequency for at last 20 hours, with reasonable cone movement, I woud suggest +-5mm at last. Then let them cool down for about 2 hours (important!) and measure again. You will see much different TSP data, which represent the real, long therm values.
Most probably you can use them in quite different constructions/ simulations then.
Most probably you can use them in quite different constructions/ simulations then.
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