Because when the speaker was being made one of the wires could have been put on the crossover incorectly. These problems are not unknown.
- 4 posts total
- 4 posts total
jim is right, but also, if you have different types of speakers.
In multi-way speakers, designers will often flip a driver relative to others to achieve correct phase relationships. So if you are using mixed brands of speakers I could see this happening.
The absolute best way to tell is to use a battery. A standard AA will work, and is safe. Attach to each speaker, and test the direction the woofer moves in with the + of the battery attached to the + of the speaker.
You could probably also use a 9V if you need a little more oomph. :)
I do have different speakers as rear channels. Sonance in-ceiling speakers. B&W CDM9NTs for LR and matching CDMCNT for center ch.
Is this something I need to actually fix to get best audio performance? If they truly are out of phase -- is this an engineering / assembly / design error?
In doing the battery test - pos moves driver forward I assume? Assuming this is correct... any movement forward would be considered valid phase?
For clarification as to steps in this confirmation test:
1. remove speaker wire from amp.
2. connect speaker pos and neg to pos and neg of AAA or 9v battery.
3. observe direction of drivers.
My L and R speakers are technically a four speaker system. NT tweeter, FST driver, and the two 6.5in drivers that actually move back and forth - in unison ( I believe )... if these drivers move in correct direction - can I assume my tweeter and FST driver are also in correct phase since I won't be able to observe them moving if at all?
I will also double check all speaker and amp connections to verify pos and neg are connected correctly.
Thanks for the information.