Compression Driver

In the spring of 2008 I was loaned a pair of Altec Lansing Super Duplex 604E for testing and research about possible crossover improvements. Unfortunately, one of the drivers had sustained damage to a compression driver binding post during shipment, and as I removed its rear cap for an inspection of the damage I discovered that the 604E had been equipped by Altec with compression driver rear loading caps. I remember the first time I removed the rear cover of an Altec Lansing small format compression driver (1” dia. throat) and saw a black plastic factory loading cap mounted over......

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