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PE WP-5211 Poly Cone Buyout Drivers
PE WP-5211 Poly Cone Buyout Drivers
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Old 11th October 2018, 01:40 PM   #1
outfoxhyperion is offline outfoxhyperion
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Default PE WP-5211 Poly Cone Buyout Drivers

Hey Guys,
So I bought a pair of these drivers on buyout about two years ago:
WP-5211 5-1/4" Poly Cone Foam Surround Woofer Pair 8 Ohms
I had them in a large sealed boombox, and they sounded fine, but I'm thinking about using them to build a bookshelf pair. I also had them in a somewhat underwhelming t-line (had to play them loud to get any kind of bass from them). I already have a workable crossover pairing these with some Dayton titanium dome tweeters, but I'm looking for box recommendations. I was thinking of going with a somewhat undersized ported enclosure (I'm thinking around 15L) tuned to around 60 Hz, any thoughts on that? I don't have FRD plots for this, so any simming is going to have to be base entirely on an "ideal" driver with these specs. I'm planning on using these as near-field PC speakers.
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Old 11th October 2018, 03:18 PM   #2
GM is offline GM  United States
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Greets!

With a 66 Hz Fs, the only way you're going to get any bass at low power is with a huge BLH, so realistically, ~66*1.56 = ~103 Hz in the mid-bass is ~where the 'bass' begins rolling off in earnest [~12 dB/octave] in a best power handling, but high Qtb/under damped, Vb = Vas/1.44 = ~6.15 L, Fb = 66 Hz.

Your alignment OTOH trades efficiency for BW, so isn't quite as under-damped with a bit more power handling below ~70 Hz, but sacrifices some power handling from well into the mid-band down to this point.

In a near-field app [< 1 m], either should play loud enough in stereo down to ~50 Hz/20 W where you'll probably need a hi-pass filter or EQ to protect them.

GM
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Old 11th October 2018, 03:24 PM   #3
outfoxhyperion is offline outfoxhyperion
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Thanks for the feedback, GM. That kind of reinforces what I was expecting, trading efficiency for BW. I'm not too concerned with efficiency in this case, as I don't expect levels to often go above 78 dB or so at 1m. As far as high pass goes, I run an EQ utility on my computer and usually have a 40 Hz HP filter, as previously I was running a pair of 3fe25 K'Nators. These WILL be doing gaming duty as well as music, though, so I expect transient spikes. That said, I'll probably end up running them on a 25 WPC lepai amp, so I expect I'll run into clipping before I run into thermal limitations on these drivers.
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Old 11th October 2018, 03:26 PM   #4
TBTL is offline TBTL  Germany
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You could equalize them to flat with DSP software on your pc, for example Equalizer APO. Extending low bass also is no problem. Then a closed box works fine and you could consider vented if you need a higher sound pressure level.

Last edited by TBTL; 11th October 2018 at 03:28 PM.
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Old 11th October 2018, 03:29 PM   #5
outfoxhyperion is offline outfoxhyperion
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As much as possible, I'd like to minimize the use of DSP and EQ, as for small speakers like these I find it squashes dynamic range in a way. Not bad for music, but not great for explosions.
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Old 11th October 2018, 03:48 PM   #6
TBTL is offline TBTL  Germany
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Do you boost above 0 dB? Some sound card drivers do not allow clipping but limit the levels instead. This softens loud parts --> compression.
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Old 11th October 2018, 03:49 PM   #7
outfoxhyperion is offline outfoxhyperion
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That may be my issue. I usually try to normalize to 0 dB as the loudest, though, so I don't know...
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