3 way speakers impendence

[Jameslc]

Hi all i am building some 3 way speakers and i am wondering what will the total impendence going into the amp be if i have 2 woofer in series 8ohms each and a midrange that 8 ohms and a tweeter that is 6 ohms or will it be a constant impendence set by the crossover ?

[AEIOU]

Originally Posted by Jameslc

Hi all i am building some 3 way speakers and i am wondering what will the total impendence going into the amp be if i have 2 woofer in series 8ohms each and a midrange that 8 ohms and a tweeter that is 6 ohms or will it be a constant impendence set by the crossover ?

Impedance (correct spelling) is a function of frequency and the impedance changes as the frequency changes. You have to remember that a crossover is a frequency dividing network.
Two 8 ohm woofers in series would be 16 ohms.
So in the range of frequencies (bass) covered by the woofers, the impedance would be 16 ohms, then in the range of frequencies covered by the midrange the impedance would be 8 ohms and then in the range of frequencies (treble) covered by the tweeter the impedance would be 6 ohms.
The impedance curve (graph) of a completed loudspeaker system looks like a roller coaster, up and down and up etc.

[Jameslc]

ok so it should be fine but with the tweeter is 6 ohms should that be ok with my Denon Pma-501 because it supports 4,8,16 ohms ?

[AllenB]

Yes, it should be OK.

[Jameslc]

thanks for the reply

[ThyDntWntMusic]

I'd be running the woofers in parallel.

what drivers are you using?

[Jameslc]

i am running Peerless 830669 12" Woofers in isobarik configuration because i wanted to get low freqs but limited on the box size

[ThyDntWntMusic]

Originally Posted by Jameslc

i am running Peerless 830669 12" Woofers in isobarik configuration because i wanted to get low freqs but limited on the box size

and the other drivers?

sealed or ported?

[Jameslc]

Peerless 830669 12" Isobarik Woofer ported
Peerless 831916 6.5" Midrange Sealed
Vifa D27TG-45-06 1" Tweeter