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running 3 midrange speakers together? different ohms
running 3 midrange speakers together? different ohms
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Old 21st November 2019, 05:55 PM   #1
elijahscott is offline elijahscott
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Default running 3 midrange speakers together? different ohms

I have two 2 inch midrange speakers and one 4" midrange in the center dash. I don't use the center dash speaker all that much and would like to put it on its own volume control if possible. Can I use an L pad on just the center speaker when I wire them all together?
The 2 midranges on the left and right are 4ohm and the center speaker is 8 ohm which would be 1.6 ohm or 16 if im not mistaken?
I obviously want the left and right the same volume and want the center to be adjustable. These would have their own 4 channel amp also. Is this possible to do? all 3 speakers are rated close to each other 25-35rms. All would be running similar frequencies through my dsp(3-500 to 5-700).
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Old 21st November 2019, 07:03 PM   #2
PeteMcK is offline PeteMcK
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RE:'Can I use an L pad on just the center speaker when I wire them all together?" - yes
wire the two outer speakers in series, and then those two in parallel with the center one - total impedance - 4 ohms
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Old 21st November 2019, 07:30 PM   #3
Galu is offline Galu  Scotland
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Hi Pete!

As I'm a Scotsman and a big fan of The Sensational Alex Harvey Band, I hope you will forgive me for correcting your quote.

Here's what the great man actually said:

YouTube

If ye had written 'mair' instead o' 'muir', ah wid've held mah wheesht!
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Old 21st November 2019, 07:47 PM   #4
PeteMcK is offline PeteMcK
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Galu, I'm a few generations removed from that accent, so it's just my antipodean approximation...
sig updated, wouldn't want to offend any Scots
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Last edited by PeteMcK; 21st November 2019 at 07:49 PM.
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Old 21st November 2019, 07:54 PM   #5
Galu is offline Galu  Scotland
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No offence taken or intended Pete!

I had never heard the quote, fan as I am - and it's rock gold!

I thank you for bringing my attention to it.
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Old 22nd November 2019, 03:24 AM   #6
elijahscott is offline elijahscott
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Quote:
Originally Posted by PeteMcK View Post
RE:'Can I use an L pad on just the center speaker when I wire them all together?" - yes
wire the two outer speakers in series, and then those two in parallel with the center one - total impedance - 4 ohms
is there a diagram you have with that? I thought I could only wire them all in series or parallel? But I don't see much info on doing 3 speakers with different ohm levels.
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Old 22nd November 2019, 02:31 PM   #7
Douglas Blake is online now Douglas Blake  Canada
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Quote:
Originally Posted by elijahscott View Post
is there a diagram you have with that?
See the Thumbnail below.
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File Type: jpg SPSpeakers.JPG (35.8 KB, 34 views)
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Old 22nd November 2019, 03:34 PM   #8
elijahscott is offline elijahscott
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Quote:
Originally Posted by Douglas Blake View Post
See the Thumbnail below.
Thanks for that. Seems easy enough. And then I just wire in a l-pad before I wire the center speaker into the other two.

I guess that doesnít mean I can do left+right for a center speaker? It will just. Be the full range of signal if itís connected to the left and right mid? My dsp has a mono input for a center and sub but only if itís wired in by itself Iím assuming.
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