Twin's Christmas Special CHR 70.3 - diyAudio
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Old 13th January 2012, 03:12 AM   #1
ttan98 is online now ttan98  Australia
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Smile Twin's Christmas Special CHR 70.3

I thought I share with all of you on how I use Mark's drivers with Twin cabinets. I normally like to use high efficiency drivers, Mark's driver normally gives about 85-86 dB spl, hence not does not meet my requirements, then I thought of using them in parallel a more respectable spl output of about 91dB.

Twin's Christmas special of$100 per pair for CHR 70.3, is too good to refuse so I bought 2 pairs. See image on how I arrange the speakers. There many ways to arrange the speakers, e.g. dipole, bipole arrangements as well. I will have a fun time experimenting.

I am currently driving them using a single ended KT88 tube. So far sounds quite good. They will improve as drivers are "burnt in".
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Old 14th January 2012, 02:25 AM   #2
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Hello,

Your system is quite interesting. It is a good tip for user to play 2 pairs of CHR-70 Gen.3 in parallel connection. The impedance of 2 pairs of CHR-70 Gen.3 in parallel is increased to 16 ohms.

Have a fun. Thanks.
Tony.
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Old 14th January 2012, 02:29 AM   #3
tinitus is offline tinitus  Europe
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have you considered to try it 1.5way ?
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Old 15th January 2012, 06:59 AM   #4
ttan98 is online now ttan98  Australia
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Originally Posted by tinitus View Post
have you considered to try it 1.5way ?
Thanks for the suggestion. That's is an option, this way the spl remains around 86dB and I mount the speakers about 1 foot from the rear wall and I don't need BSC.

I will try various options to get the best sound from my seating position.
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Old 15th January 2012, 07:02 AM   #5
ttan98 is online now ttan98  Australia
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Quote:
Originally Posted by Musik007 View Post
Hello,

Your system is quite interesting. It is a good tip for user to play 2 pairs of CHR-70 Gen.3 in parallel connection. The impedance of 2 pairs of CHR-70 Gen.3 in parallel is increased to 16 ohms.

Have a fun. Thanks.
Tony.
I think parallel the speakers means the impedance drops to 4 ohms nominal not 16ohm that's the speakers are connected series.
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Old 17th January 2012, 01:21 AM   #6
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Hello,

You are right. The impedance of parallel connection is 4 ohms and series connection is 16 ohms.

Thanks for your remind.

Tony.
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Originally Posted by ttan98 View Post
I think parallel the speakers means the impedance drops to 4 ohms nominal not 16ohm that's the speakers are connected series.
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