Home » Sponsored » Pi Speakers » 7Pi Build 2014 (7Pi Build 2014)
Re: 7Pi Build 2014 [message #80506 is a reply to message #80492] Wed, 17 September 2014 00:06 Go to previous messageGo to next message
compaddict is currently online  compaddict
Messages: 86
Registered: April 2014
Location: Auburn, CA USA
Viscount
I can hear voices better now but something is still very wrong.
Something out of phase. When I switch to mono I hear a reverb or out of phase distortion.
Re: 7Pi Build 2014 [message #80509 is a reply to message #80506] Wed, 17 September 2014 07:14 Go to previous messageGo to next message
Wayne Parham is currently online  Wayne Parham
Messages: 18670
Registered: January 2001
Illuminati (33rd Degree)

A misconnected driver will sound subtly wrong. It won't take the whole power response off, it will simply shift the nulls to being in front of the speaker instead of outside the speaker's radiating pattern. That's bad, and you don't want it. And it's noticeable. But rather subtle, really.

Any chance of making measurements? That will tell us what's going on.

Re: 7Pi Build 2014 [message #80512 is a reply to message #80509] Wed, 17 September 2014 08:32 Go to previous messageGo to next message
compaddict is currently online  compaddict
Messages: 86
Registered: April 2014
Location: Auburn, CA USA
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Thursday we are pulling the mid drivers and having a listen as well as taking measurements.
Going to learn REW.
Re: 7Pi Build 2014 [message #80514 is a reply to message #80512] Wed, 17 September 2014 10:23 Go to previous messageGo to next message
Wayne Parham is currently online  Wayne Parham
Messages: 18670
Registered: January 2001
Illuminati (33rd Degree)

Excellent. Once we have hard data, I think we'll be able to locate the problem.

Re: 7Pi Build 2014 [message #80515 is a reply to message #80514] Wed, 17 September 2014 10:44 Go to previous messageGo to next message
compaddict is currently online  compaddict
Messages: 86
Registered: April 2014
Location: Auburn, CA USA
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A gentleman at diyaudio mentioned that L2 should have a 1.0mH instead of a jumper?
It was also mentioned on this site as well as a few other posts and suggestions.
Can you offer any clarity?
I ordered two new Delta 10's just in case I tightened them down to much.. A possibility.
Re: 7Pi Build 2014 [message #80516 is a reply to message #80515] Wed, 17 September 2014 14:45 Go to previous messageGo to next message
tom-m is currently offline  tom-m
Messages: 56
Registered: December 2009
Location: Texas
Baron
Look at the crossover diagram in the pdf file for the 7pi. On that page, the notes in the lower left corner talks about L2. The coil is needed for the Delta 10. Or use jumper for Alpha 10 or JBL mid. Also, when L2 installed, reverse tweeter polarity. For more info, see the notes in the pdf file.
Re: 7Pi Build 2014 [message #80517 is a reply to message #80516] Wed, 17 September 2014 16:12 Go to previous messageGo to next message
Wayne Parham is currently online  Wayne Parham
Messages: 18670
Registered: January 2001
Illuminati (33rd Degree)

That is correct. The board was built for use with an Alpha 10. Confused

I'm so sorry about that! I just noticed it. Been a busy time for us, what with the move and all.

So to resolve, you can either send back the boards and we'll install the 1.0mH coils or I can ship some to you. If you go the latter route, I'll throw in a tube of silicon adhesive, because you will want to put some under each coil as a cushion/mount for them.

Just let me know, we'll do it either way. So sorry, I can't believe I just noticed that.

Re: 7Pi Build 2014 [message #80583 is a reply to message #80517] Sun, 28 September 2014 11:37 Go to previous messageGo to next message
compaddict is currently online  compaddict
Messages: 86
Registered: April 2014
Location: Auburn, CA USA
Viscount
Soldered in the coil and they sound much better now. The speakers were fine as well. Head to head outside the box against new the originals sounded better than the new.
I have to seal up the access panels a bit still but they sound much better.
I would not call them audiophile quality but I think I can get used to them for home theater.
Been playing with Yamahas YPAO and DSP a bit and that helps a bunch.
Re: 7Pi Build 2014 [message #80584 is a reply to message #80583] Sun, 28 September 2014 12:11 Go to previous messageGo to next message
rkeman is currently offline  rkeman
Messages: 78
Registered: March 2010
Location: Florida
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The midrange of the 7 and 6Pi cornerhorns is definitely "audiophile" quality. Have all of the crossover and construction issues been resolved? If so, are they placed in appropriate corners with the listening axis crossing a foot or so in front of the listening position? How do they sound with no equalization and run full-range? You've been through a lot with the build and it would be a shame not to get the most out of a design capable of superb performance.
Re: 7Pi Build 2014 [message #80622 is a reply to message #80584] Sat, 04 October 2014 10:22 Go to previous messageGo to previous message
compaddict is currently online  compaddict
Messages: 86
Registered: April 2014
Location: Auburn, CA USA
Viscount
REW flat.
index.php?t=getfile&id=1563&private=0
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    (Size: 69.52KB, Downloaded 9951 times)
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