The 420A is called a bi-flex speaker. It consists of a large cone and a 16 cm diameter cone with different stiffness integrated into a multi-dumped corrugation. This enables playback with less …

420Aはバイフレックススピーカーと呼ばれるもので、大型コーンとスティフネスの異なる16cm口径相当のコーンがマルチダンプされたコルゲーションで一体化された構造となって …

Late 1960's pair Altec 420A BiFlex. Much better than 12" version. Very efficient, good for open baffle tube amps. Single ended 300B. Alternative to RCA LC1A Tannoy Gold Silver Black or …

2016年9月11日 · The 420A was what started me down the long steep slippery Altec slope, and now I measure my speakers in tons and cubic yards... But the important thing is that those …

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2 Altec 872B 'Madrid' cabinets each containing an Altec 420A Bi-Flex and tweeter. I am the original owner, they are unmodified, and they have been well taken care of since purchase. …

Here is a working pair of vintage speakers made by Altec Lansing model 420a. These woofers were removed from a working pair of Altec Santana home audio speakers that had damaged …

2015年9月17日 · With miniDSP, I'm currently using 2,380Hz xover point, as this is the planned point for a passive xover I'm getting built, based on testing from the Altec guru (Marcus) who …

2003年2月23日 · Altec Lansing 419-8B/420A BIFLEX® Loudspeaker Literature Sheet - Front Altec Lansing 419-8B/420A BIFLEX® Loudspeaker Literature Sheet - Rear . Back to Altec …

2021年12月20日 · It's hard to get good response from the 420A, in an enclosure that's less than 8 cubic feet, realistically. That's a Qtc=1.0 for a sealed cabinet. You might get away with as low …