2 Ohm & 4 Ohm Parallel Ops
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Ultimate HDF Member
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From: TEXAS
2 Ohm & 4 Ohm Parallel Ops
Curious as to why it is frowned upon to parallel speaks that are are not in the same ohm family. Will it hurt the amp, give shixxy sound, both???
Just for the record, this question is coming from the audio cave man, me, but I am being told by some folks that it's ok to parallel speaks from differing ohm families. Just pushing the "group think" button and will test it out when I get back in town, unless you think I will blow something up.
Pushing with the BT4180.
Thanks!!!!
T.
Just for the record, this question is coming from the audio cave man, me, but I am being told by some folks that it's ok to parallel speaks from differing ohm families. Just pushing the "group think" button and will test it out when I get back in town, unless you think I will blow something up.
Pushing with the BT4180.
Thanks!!!!
T.
Last edited by Tailwind; Feb 4, 2016 at 01:45 AM.
Ultimate HDF Member
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From: Indianapolis IN.
Curious as to why it is frowned upon to parallel speaks that are are not in the same ohm family. Will it hurt the amp, give shixxy sound, both???
Just for the record, this question is coming from the audio cave man, me, but I am being told by some folks that it's ok to parallel speaks from differing ohm families. Just pushing the "group think" button and will test it out when I get back in town, unless you think I will blow something up.
Pushing with the BT4180.
Thanks!!!!
T.
Just for the record, this question is coming from the audio cave man, me, but I am being told by some folks that it's ok to parallel speaks from differing ohm families. Just pushing the "group think" button and will test it out when I get back in town, unless you think I will blow something up.
Pushing with the BT4180.
Thanks!!!!
T.
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
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From: Lake, Ms
4ohm and 2ohm in parallel will give you a total of 1.3ohms. General thinking would have you to believe that if 2-8ohms will give you 4ohms and 2-4ohms will give you 2ohms then a 4ohm and a 2ohm will give me 3ohms....not the way the math works. Here's an easy calculator to help.
http://geoffthegreygeek.com/calculat...s-in-parallel/
http://geoffthegreygeek.com/calculat...s-in-parallel/
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From: TEXAS
Excellent!!! Thank you!
Spoke with a BT rep yesterday afternoon and he stated that there would not be a problem with 4ohm and a 2 ohm hooked up to the BT4180.
"You will not hurt this amp. It is a universal class d amp and this combination will be fine," says BT.
The optimum words being "universal" and "fine." Just wish he said "good" or even "great".
Today is my last day of vacation so I will be back in town later today and might tinker to see what happens performance wise, but back to reality tomorrow so my tinkering days will be limited for a while.
Ultimately will try and get an under the hood mounted amp for the speakers in the bags, so this is all temporary unless it actually hits hard with this impedance mixup.
Thanks again!!!!
T.
Spoke with a BT rep yesterday afternoon and he stated that there would not be a problem with 4ohm and a 2 ohm hooked up to the BT4180.
"You will not hurt this amp. It is a universal class d amp and this combination will be fine," says BT.
The optimum words being "universal" and "fine." Just wish he said "good" or even "great".
Today is my last day of vacation so I will be back in town later today and might tinker to see what happens performance wise, but back to reality tomorrow so my tinkering days will be limited for a while.
Ultimately will try and get an under the hood mounted amp for the speakers in the bags, so this is all temporary unless it actually hits hard with this impedance mixup.
Thanks again!!!!
T.
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Ultimate HDF Member
Joined: Mar 2015
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From: TEXAS
Yes. In parallel. He even mentioned a 1.something ohm number that you guys had come up with. Thus the reason I brought this info to you guys as its contrary to conventional wisdom, not to mention the amp specs.
If I get ballsy enough to try this, is the best place to make the parallel connections on the Focal crossover POS and NEG posts?
T.
If I get ballsy enough to try this, is the best place to make the parallel connections on the Focal crossover POS and NEG posts?
T.
Elite HDF Member
Joined: Aug 2008
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From: S. FL
Yes. Daisy chain the lids speakers and bag speakers before/at the x-over.
Mmm.....I never knew the BT 4180 was 1 ohm stable.
Mmm.....I never knew the BT 4180 was 1 ohm stable.
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I've read you guys saying those amps have no gain control. Is it possible that amp has enough smart technology built in, that it will prevent itself from damage if run at a lower impedance than 2 ohm? Does it use its own internal circuitry to adjust gain? I read there's a light that indicates clipping, would that circuitry come into play when "overclocking" the amp?
I know I used to have amps that would run lower impedance than "suggested" by the manufacturer. Those weren't class D though. My first class D amp was a Mmats D200HC. That was probably 15 years ago at least. I'm just getting back in the audio game, so I'm still figuring this new stuff out.
I know I used to have amps that would run lower impedance than "suggested" by the manufacturer. Those weren't class D though. My first class D amp was a Mmats D200HC. That was probably 15 years ago at least. I'm just getting back in the audio game, so I'm still figuring this new stuff out.
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From: TEXAS
Just threw some speaks in the bags and they worked perfect. Good addition to bass. No tweaks to any settings is required.
I did talk to BT prior to throwing these in and I cannot tell you enough how confident they are about this working properly. As mentioned above, they are confident that their smart technology not only has some significant margins in ohm range & low end ohm efficiency but also circuitry protection that will just shut the speaks or channel off without injury if it gets too low. Pretty damn shocking!!!! Impressed!!!
So now that the toothpaste is out of the tube regarding putting speaks in my bags, should I drill some holes in the bags facing the wheel and mount accordingly or find a fancy mount kit?
Still gonna work towards getting a dedicated micro amp for bag speaks, but at least progress is being made.
Thanks again for all of the assistance!!!!
T.
I did talk to BT prior to throwing these in and I cannot tell you enough how confident they are about this working properly. As mentioned above, they are confident that their smart technology not only has some significant margins in ohm range & low end ohm efficiency but also circuitry protection that will just shut the speaks or channel off without injury if it gets too low. Pretty damn shocking!!!! Impressed!!!
So now that the toothpaste is out of the tube regarding putting speaks in my bags, should I drill some holes in the bags facing the wheel and mount accordingly or find a fancy mount kit?
Still gonna work towards getting a dedicated micro amp for bag speaks, but at least progress is being made.
Thanks again for all of the assistance!!!!
T.