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Lowther: wiring for two-way speaker system (Bicor)
Lowther: wiring for two-way speaker system (Bicor)
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Old 1st March 2021, 07:40 PM   #1
Ksssu is offline Ksssu  Russian Federation
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Default Lowther: wiring for two-way speaker system (Bicor)

Hi all,
I have cabs Lowther Bicor 2000, which requires two Lowther 8" speakers each. How should wiring look like? Simply parallel connection without crossover?
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Old 2nd March 2021, 12:30 AM   #2
ewollowe is offline ewollowe  Australia
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Cool cabs.

Assuming the Lowthers are 8ohms each and your amp is ok with a 4ohm load I would think that was fine?
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Old 2nd March 2021, 08:05 AM   #3
Ksssu is offline Ksssu  Russian Federation
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I have Leak Stereo 20, which sounds very nice with my Lowther Mini Acousta PM6a. My second amp is HEATHKIT W-5m, which also plays good with Lowther, but IMO its better performance is with JBL-like speakers (I have a pair of JBL LE8T). BTW it is interesting that Leak 20 doesn't match JBL LE8T, the sound somewhat lacks flavor.

So returning to the Bicor question. The cabs go without wiring, only banana connectors are included. Should I make something like this? Sorry for the pic, I'm not an engineer.

Should I switch my amp in the 4 ohms mode to use Bicor 2000?
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Old 2nd March 2021, 09:25 AM   #4
ewollowe is offline ewollowe  Australia
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Unfortunately I have no experience with those amps maybe someone else can chime in but if the amp has a 4ohm mode well then that certainly sounds promising for compatibility.

Your picture looks fine to me, when I've done this in the past I just had one set of wires going to one driver and then daisy-chained off that to the other.

It might be interesting to bi-amp the speakers if you put in another set of banana plugs.
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Old 2nd March 2021, 09:29 AM   #5
Ksssu is offline Ksssu  Russian Federation
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Thank you!
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Old 2nd March 2021, 11:16 AM   #6
waxx is offline waxx  Belgium
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Series of parallel can be done. In series the impendance will be nominal 16ohm, which is no issue for any amp, but the amp won't give the full volume. In parallel the impendance will be nominal 4 ohm, which is no issue if your amp can drive 4R speakers. I don't know if the Leak can do that, but if it could, it may be the best solution.
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Old 2nd March 2021, 11:16 AM   #7
midrange is offline midrange  United Kingdom
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You could try contacting Contact | Lowther Loudspeakers
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Old 3rd March 2021, 10:56 AM   #8
Ksssu is offline Ksssu  Russian Federation
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I followed the advice and asked at lowtherloudspeakers.com. Martin Thornton from the Lowther team kindly answered me that, firstly, the parallel connection (as on my pic) is indeed an appropriate solution. Secondly the output will be either 15ohms (for two paralleled 15ohms speakers) or 8ohms (for two paralleled 8ohms speakers).
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Old 3rd March 2021, 12:22 PM   #9
Scottmoose is offline Scottmoose  United Kingdom
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Quote:
Originally Posted by Ksssu View Post
I followed the advice and asked at lowtherloudspeakers.com. Martin Thornton from the Lowther team kindly answered me that, firstly, the parallel connection (as on my pic) is indeed an appropriate solution. Secondly the output will be either 15ohms (for two paralleled 15ohms speakers) or 8ohms (for two paralleled 8ohms speakers).
Total nominal impedance cannot possibly be 15ohms for two drive units with 15ohm coils & wired in parallel, or 8ohms for two drive units with 8ohm coils & wired in parallel.

Using those nominal values:
1pr of 8ohm drivers wired in parallel = 4ohms
1pr of 8ohm drivers wired in series = 16ohms

1pr of 15ohm drivers wired in parallel = 7.5ohms
1pr of 15ohm drivers wired in series = 30ohms
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Old 3rd March 2021, 04:59 PM   #10
Ksssu is offline Ksssu  Russian Federation
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Yes, I guess it was Martin's accidental mistake.
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