ALTEC LANSING 604E for sale. Reluctantly up for sale is this pair of classic Altec Lansing 604E speakers. They are in excellent condition, look and sound great. ALTEC, ALTEC LANSING, and the Altec Lansing logo are marks of Altec Lansing/AL Infinity, LLC. Altec Lansing. Over Ear / On Ear; Sport Earbuds; Earbuds. House Party Mode is the newest feature on select Altec Lansing speakers. It is the pairing setting that enables you to connect up to 50 speakers at once. Model 834 3-way TA network designed for 604E with additional UREi 800W L.F. New version listed in the early 2000's by Altec Lansing Pro.

Ch341 Usb To Serial Driver X64. 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. Intel 82865gv Graphics Controller A-2 there.

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 that delicate and fragile aluminum HF diaphragm. It was part of an 802-D that had come with my recently purchased A7-500s. Altec, I had been told, recommended loading caps on its small format compression drivers which were crossed over at 500Hz or 800Hz to prevent diaphragm over-excursion at high output levels.

I had also been told by another Altec home user that removing the cap would result in a sweeter and more natural sounding high frequency reproduction. The latter sounded very inviting to me, and, as I didn’t expect to run my A7s anywhere near theatre output levels, I removed the loading caps, re-secured the diaphragms with slightly shorter mounting screws and placed a thin layer of acoustically absorbent material inside the rear covers. It was good advice. The HF musical presentation was much more natural and relaxed sounding to my ears, and certain sounds, like brushes on cymbols, sounded fantastically accurate and real. That was over 20 years ago and I never used loading caps in home settings after that day.

So here now was an opportunity to test the 604E, both with and without its compression driver loading cap, and see what some objective data might say about the wisdom of throwing out the compression driver rear loading cap. The first screen shot above shows MLS Frequency Response of the 604E compression driver with (red trace) and without (blue trace) a loading cap. The measurement was made on-axis and the compression driver was driven directly without a crossover network. Film The Sleeping Dictionary 2003 here. Information below 200Hz is not accurate due to the short time period of the MLS test signal utilized. It would appear that there is very little difference between the two configurations from 1000Hz and up, which is where one listens to a 604E compression driver.