Speakers out of phase? - Blu-ray Forum

cravnsn · 08-23-2008, 01:01 AM

I was fiddling around with my speakers, Insignia NS-B2111. If you’re unfamiliar with them, they are a knock-off of the KEF design, with the tweeter in the center of the woofer cone (see picture below). While I had one of the enclosures open to see what other “stuffing” I could put in them, I noticed something odd – the tweeter was hooked up out of phase with the woofer.

Please correct me if I’m wrong, but I always thought the idea of wiring a tweeter out of phase with the woofer was to help time-align the two drivers in a conventional two way system, with the tweeter mounted above (or below) the woofer. Since the whole idea of a coincidental tweeter is to keep the time aligned, shouldn’t the tweeter be wired in phase with the woofer?

richteer · 08-23-2008, 03:17 PM

Quote:

Originally Posted by cravnsn

Please correct me if I’m wrong, but I always thought the idea of wiring a tweeter out of phase with the woofer was to help time-align the two drivers in a conventional two way system, with the tweeter mounted above (or below) the woofer. Since the whole idea of a coincidental tweeter is to keep the time aligned, shouldn’t the tweeter be wired in phase with the woofer?

Usually, I'd be inclined to agree with you. Are both speakers wired the same way? If so, it could be that the crossover induces some phase delay, which wiring the tweeter out of phase "corrects".

Might be worth checking with the manufacturer...

mdabb · 08-23-2008, 03:31 PM

I'm sure It's wired that way because the speakers are coaxial and to avoid phase cancellation. Both drivers have capability to produce similar frequencies so they are wired out of phase.

I have seen other coaxial speakers that way.

cravnsn · 08-23-2008, 06:05 PM

That’s just it though, it’s coincidental, not coaxial ala KEF Uni-Q speakers. I have 4 of the speakers, and they’re all wired the same.

mdabb · 08-23-2008, 06:31 PM

I am not familiar with their technology but maybe it's their own version of coaxial. In any case I'm sure it's to avoid phase cancellation.

If it really has peaked your interest I would call the manufacturer and ask to speak to a tech. Sorry couldn't be of more help..............

08-23-2008, 01:01 AM	#1
cravnsn Banned Member since:Aug 2008	Speakers out of phase? I was fiddling around with my speakers, Insignia NS-B2111. If you’re unfamiliar with them, they are a knock-off of the KEF design, with the tweeter in the center of the woofer cone (see picture below). While I had one of the enclosures open to see what other “stuffing” I could put in them, I noticed something odd – the tweeter was hooked up out of phase with the woofer. Please correct me if I’m wrong, but I always thought the idea of wiring a tweeter out of phase with the woofer was to help time-align the two drivers in a conventional two way system, with the tweeter mounted above (or below) the woofer. Since the whole idea of a coincidental tweeter is to keep the time aligned, shouldn’t the tweeter be wired in phase with the woofer?

Similar Threads
thread	Forum	Thread Starter	Replies	Last Post
Phase IV	Wish Lists	LordCrumb	7	02-20-2015 09:57 PM
NiubNiub Theater: The Making Of - Phase I & Phase II	Home Theater Galleries	NiubNiub	150	03-11-2014 05:28 PM
Phase on a Sony Sub	Subwoofers	browndk26	1	02-03-2010 11:17 PM
What is subwoofer phase	Subwoofers	Canada	2	09-01-2009 12:56 AM
Yamaha RX-V663 speakers out of phase?	Receivers	TT Tony	4	04-07-2008 04:47 AM

08-23-2008, 03:31 PM	#3
mdabb Power Member Member since:Jan 2008 Trading Score:1	I'm sure It's wired that way because the speakers are coaxial and to avoid phase cancellation. Both drivers have capability to produce similar frequencies so they are wired out of phase. I have seen other coaxial speakers that way.

08-23-2008, 06:05 PM	#4
cravnsn Banned Member since:Aug 2008	That’s just it though, it’s coincidental, not coaxial ala KEF Uni-Q speakers. I have 4 of the speakers, and they’re all wired the same.

08-23-2008, 06:31 PM	#5
mdabb Power Member Member since:Jan 2008 Trading Score:1	I am not familiar with their technology but maybe it's their own version of coaxial. In any case I'm sure it's to avoid phase cancellation. If it really has peaked your interest I would call the manufacturer and ask to speak to a tech. Sorry couldn't be of more help..............

Best Blu-ray Movie Deals