8 Ohm 2X12 Guitar Speaker cabinet - 2X4 Ohms in series or 2X16 Ohms in parallel? - Page 2 - diyAudio
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Old 31st August 2013, 10:29 AM   #11
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Originally Posted by KatieandDad View Post
How do the voice coils affect each other in series? Putting a large coil in series with the other speaker would reduce its HF response.
It has no such effect - putting identical speakers in parallel or in series sounds exactly the same (as near as makes no odds - the biggest difference though would be due to the lower damping factor).
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Old 31st August 2013, 01:49 PM   #12
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Originally Posted by KatieandDad View Post
How do the voice coils affect each other in series? Putting a large coil in series with the other speaker would reduce its HF response.
maybe you are thinking of drivers with double voice coil
(that said, and no matter the reason, it might still sound different wired in series or parallel)
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Old 2nd September 2013, 08:31 AM   #13
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Originally Posted by KatieandDad View Post
How do the voice coils affect each other in series? Putting a large coil in series with the other speaker would reduce its HF response.

I don't suppose that a large guitar speaker will have too much HF response anyway.
That only happens because the impedance of the inductor at HF is much larger than the impedance of the driver.

Two identical drivers will get exactly half-voltage each, at any frequency, so their HF response isn't affected.

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Old 2nd September 2013, 12:50 PM   #14
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I'm sure you are right

just curious if anyone actually tested this in practice ?
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Old 2nd September 2013, 12:59 PM   #15
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I'm sure you are right

just curious if anyone actually tested this in practice ?
I've a cheapie multi-meter and a couple of JBL subwoofers. I'd expect all (cone type) drivers will behave in a similar fashion, so those would do for a test:

Set frequencies of, say, 20Hz, 50, 100, 200, 500, 1k, 2k, 3k, 5k, 8k, 15kHz, and measure the voltages across both, with reasonable drive signal.

I'd expect the voltages to be within 10% of each other, based on fairly-standard manufacturing tolerance.

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Old 2nd September 2013, 04:11 PM   #16
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I'm sure you are right

just curious if anyone actually tested this in practice ?
Millions of perfectly working speakers in use seem a pretty good test to me

To be honest I'm somewhat bemused at such a question even been asked?.
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Old 6th September 2013, 08:03 AM   #17
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not a question whether it works or not, ofourse it will work
but will it really sound the same no matter how drivers are connected

you say it will
so I asked if you tried it yourself
and listened to all the different combinations
or rely on 'all the same'

I would be interested in hearing if anyone actualy tried all possible combinations, and listened to them

different thing, but I have 4 small Foster tweeter horns, and coupled as parallel pairs they sound harsh ... but very sweet in series
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Old 6th September 2013, 09:03 AM   #18
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not a question whether it works or not, ofourse it will work
but will it really sound the same no matter how drivers are connected

you say it will
so I asked if you tried it yourself
and listened to all the different combinations
or rely on 'all the same'
I've wired speakers in probably every way possible - and perhaps even a few that weren't

The only difference is the damping factor, which doesn't really matter that much anyway - and certainly not for guitars
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Old 6th September 2013, 09:29 AM   #19
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hmm ... yeah, if any difference, it would probably only 'show' at frequencies(higher) that these kind of drivers does not produce anyway

and any small difference would most likely also drown in distortion, or whatever is related to common guitar sound
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Old 6th September 2013, 10:54 AM   #20
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hmm ... yeah, if any difference, it would probably only 'show' at frequencies(higher) that these kind of drivers does not produce anyway
Damping factor mostly affects bass, the better the damping factor the more control of the speaker cone.

The crossovers used for high frequency units prevent them being effected at all, and in any case the small cone movement doesn't really have 'control' problems.
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