Thanks again. Sorry to be daft, but do you mean 7 feet from the floor or 7 feet above the listening zone?

 

Thanks!

7 feet up from the floor should do it.

-Oliver

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Oliver Amnuayphol
Home Theater/Audio Guru
Aperion Audio

Roger that! Thanks!

I'm curious how Aperion managed 90Hz extension (-3db) with the 4" driver in such a small cabinet, whereas the dual 5.25" driver dipole only reaches 100Hz (-3db).

Is the 4BP bottom ported or sealed?

Hi alphaiii, thanks for your inquiry. Basically any dipole speaker (whether dynamic driver, electrostatic, planar-ribbon, etc.) that attempts to reproduce low frequencies will experience some cancellation of said frequencies unless the two indentical out of phase waves can be kept from summing in free air; this is one reason why you must put a moving coil woofer into an enclosure to get better bass performance. Thus, the 5DB in dipole operation will experience this cancellation in the bass frequencies. Of course, the 5DB has many other benefits to it that make it a fine speaker and will actually play a smidge lower in the bass when in bipole mode. But due to our desire for the enclosure to be a manageable size, and the fact that there's usually no bass information in the surround channels anyway, the 5DB proves more than sufficient for a typical surround setup.

Lastly, since the 4BP is a sealed bipole speaker with a single woofer, there's no possibility of two out of phase waves--only in phase waves in the treble region.

Thanks for your question, hope this helps.

-Oliver

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Oliver Amnuayphol
Home Theater/Audio Guru
Aperion Audio

Oliver...Thanks for the explanantion.

One more question...

The specs on the website listed the 90Hz-17kHz (+/-3dB) frequency response, whereas the manual available for download from the website lists 100Hz-15kHz (+/-3dB).  Which of these specs is correct? 

alphaiii,

The specs in the manual are correct for the way we measured it which is on axis for the 4" woofer and off axis for the tweeters.  Thus the low high frequency number.  If we were to measure it on axis with the tweeters, they would hit 20Khz no problem.

With angled surrounds, they are very tough to measure because you'll be off axis of one or more drivers.

To remove any confusion, though, we'll be modifying the website spec to match the printed manual spec to keep everything consistent.  Thanks for the catch.

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Mark
Aperion Audio Guru

After a few weeks of hemming and hawing, I finally bit the bullet and bought two 4BP speakers. They will complement my 533-VAC and two 532 bookshelf speakers. The biggest hurdle was and will still be how to mount them on the wall with wiring behind the wall. The wall they will go on is insulated. I have access to the floor from the basement, but it will still be a job to fish the speaker wire.

I'm looking forward to hearing them and am now excited to finally have surround speakers setup in my new home! :)

P. S. Thanks for the 100' of free speaker wire Aperion!

I'm looking to upgrade my home theater with new center, surround, and rear surround speakers.  Due to limited budget, I'm considering the 4C center, and 4b's for surround and rear.  However, what difference would the 4BP make as side surrounds?  Would there be a noticeable difference from the 4B's and in what way?

 Thanks 

Hi glassetcher and welcome to the forum.

The 4BP will provide a more diffuse sound field than the 4B would.  This will create a more immersive soundstage for movies when used as surrounds.  The 4B's work well for surrounds too, but the 4BP will give you a more immersive effect due to it's three sides.  You could also go with teh 4BPs for rears too if you desire.  However, if you also intend to listen to a lot of music, I would perhaps leave the rears as 4Bs since the directional 4Bs are more desireable for music.

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Mark
Aperion Audio Guru

Mark, thanks for your input.  Since my post I've been doing some additional reading on the forum and it seems there are some strong recommendations to get a good center channel speaker, especially for movies, which I frequently watch.  Since I don't have the budget for both the 4BPs and an upgrade to the 5C,  I'm thinking of sticking with the 4B's for the 4 surrounds and the 5C center.  What do you think?  The main thing I am looking for is a upgrade to sonically compatible home theater setup, as opposed to my current rag tag mixture of speakers. 

Since the center channel is of utmost importance, I'd definitely upgrade this first over the 4BPs; you can also use the trade up program to go from 4Bs to 4BPs if that's a viable option within a year.

Happy Listening,

- Oliver

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Oliver Amnuayphol
Home Theater/Audio Guru
Aperion Audio