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Old 23rd January 2018, 09:29 PM   #1
nelsondog is offline nelsondog  Philippines
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Default Altec...

I have a pair or 15" Altec 420a BiFlex woofers and a pair of 811b horns. Asking $300 for all plus shipping from BC.

Thanks for looking
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Old 23rd January 2018, 09:44 PM   #2
Cal Weldon is offline Cal Weldon  Canada
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Altec...
Those look in really great shape. I am betting they sell fast for that price. Too bad my cupboards are full already.
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Old 23rd January 2018, 09:56 PM   #3
scottjoplin is offline scottjoplin  Wales
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That's an interesting driver, I wondered what bi-flex meant, and found this:

It has same basket as the bass drivers with 15 inch cast frame and Alnico V magnet, but the paper cone is divided into two, connected by specially selected suspension. It is like a 20 cm midrange glued to the circular remains of a bass driver. At frequencies around 100 Hz the mechanical coupling allows the surrounding bass part to start moving. Above that - the surround is too heavy and behaves like a frame. Very clever, inn'it? I think someone called this a "mechanical crossover".
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Old 23rd January 2018, 10:05 PM   #4
tommydoan84 is offline tommydoan84  United States
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Altec...
I'm interested. PM sent.

Thanks,
Tom

Quote:
Originally Posted by nelsondog View Post
I have a pair or 15" Altec 420a BiFlex woofers and a pair of 811b horns. Asking $300 for all plus shipping from BC.

Thanks for looking
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Old 25th January 2018, 05:11 PM   #5
nelsondog is offline nelsondog  Philippines
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Old 30th January 2018, 02:51 AM   #6
Cal Weldon is offline Cal Weldon  Canada
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Altec...
How's this going?
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Old 30th January 2018, 11:08 AM   #7
nelsondog is offline nelsondog  Philippines
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Lots of interest but they are still in my possession
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Old 31st January 2018, 02:13 AM   #8
Cal Weldon is offline Cal Weldon  Canada
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Altec...
Hmmm...
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Old 31st January 2018, 02:15 PM   #9
chromenuts is offline chromenuts  United States
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You have PM
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Old 31st January 2018, 07:26 PM   #10
nelsondog is offline nelsondog  Philippines
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