Rockbox mail archiveSubject: Re: Slightly OT: Channel phase
Re: Slightly OT: Channel phase
From: BlueChip <cs_bluechip_at_webtribe.net>
Date: Sat, 04 Jun 2005 17:44:08 +0100
>>>Take a 1.5 AA cell and two connecting leads; connect the + and - of the
>>>cell to the loudspeaker terminals; you'll hear a small "pop" and the
>>>bass driver will move slightly, either forward or backward. The drivers
>>>of both speakers should move in the same direction when the polarities
>This is the procedure I've use many times, to check speakers. I usually
>find a 9V battery works better though.
9Volts into 4Ohms -> 2.2Amps
2.2Amps _at_ 9Volts -> 20Watts
That'll be "20Watts RMS" or "26Watts peak-to-peak" or "about 1'300Watts PMPO"
So 9V would kill most desk-top speakers, but work well with stage kit.
>>>Ithink only relative phase between the two speakers matters, i.e. if you
>>>reverse polarity in both speakers that shouldn't mater.
Depends on your speakers.
If you just have a cheap cone with two wires - meh.
If you have isodynamic speakers or a cross over or one of many other things
- it WILL matter.
I know hifi purists who are convinced they spent good money on SPEAKER
CABLE that has a right and a wrong way around.
Received on 2005-06-04