Altec Lansing 6. 04 8. H Crossover Revelations Altec Lansing 6. H Crossover Revelations. Enter the H model. In early 2. 00. 4 I acquired a pair of 6. Hs, the last. ALNICO magnet duplex model Altec produced before they switched to ferrite magnets. Php Mysql Projects With Source Code here. It was also the first Altec duplex model that. Tangerine phase plug with a constant directivity high frequency horn and a crossover that utilized. I swapped out my 6. Bs for these Hs using the same cabinets, and was immediately. What was in that Dual EQ crossover List of USB IDs Maintained by Stephen J. Gowdy If you have any new entries, please submit them via http or send. Classifieds FOR SALE Altec Lansing Model 19 speakers asking for 4000. This is a complete list of all the replacement parts we manufacture. Please contact us for pricing and availability. How to find the parts you require Look in the. Could it be adapted to older 6. Crossover Topology. I spent a few hours tracing out the crossover circuit. Jim Easleys help to organize it into a usable and readable format. Jim did an excellent job. Follow the link on the Vintage Altec 6. H Schematic. page to download our reproduction of this vintage circuit in a PDF format. 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. The. Find great deals on eBay for vintage altec speakers and vintage klipsch speakers. Shop with confidence. A Fresh Look at Hifi Loudspeakers Matching Includes a selected listing of Loudspeakers from the 195681 Hifi Yearbooks. Weve never read a page like this one weve. Technicalaudio. compdf. DUPLEX. html minor cleanups April 2010. THIS IS A LISTING OF ALTEC 604 DUPLEX SPEAKERS, SOME DERIVATIONS AND RELATED. Enter the H model. In early 2004 I acquired a pair of 6048Hs, the last ALNICO magnet duplex model Altec produced before they switched. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get. I have also included a link for a Jim Easley. Vintage Altec Model 1. At the basic level the 6. H filter is a. parallel 3rd order HP and 2nd order LP filter, with L pad shelving of all horn frequencies when the EQ button on the front. Pretty much like a stock 6. G filter. However, when the EQ button is clicked inward to. The older style shelving circuit is disabled, an adjustable, frequency dependent. HF slope. At the recommended dial settings the upper mids are appropriately depressed relative to. Mastering Labs and UREI 6. Unfortunately. this Altec filter is not time domain corrected like the others so I naturally wondered just how would it sound if applied. B filters           MF EQ on a 1. B Adding the mid frequency EQ function to my 6. B circuit. was pretty straight forward. The old style shelving circuit was deleted and a tweaked contour circuit was substituted in its. I used a 7uf capacitor instead of Altecs 6uf, and modified the resistor values slightly to achieve a 3d. B to 9d. B. MF EQ normal operating range with a 1. I chose not to add the high frequency trim circuit or driver side. I had found myself running the 6. H HF control wide open. Yeah, yeah, I know what youre asking. To make a long story short, I  put the 6. Bs back into the cabinets and immediately heard all the. H, plus razor sharp transient attacks from rim shots and piano. The improved transients. Dont get me wrong Im not saying the B was now. H but it was much improved over its standard shelving circuitL pad equipped brethren. It was. Hz for my taste however, so I added a 2 ohm series resistor after the contour circuit to shape. HF slope a bit, and also lowered the resistance value between P1 and ground to achieve a wider 5 to 1. B MF EQ. normal operating range. These two changes put the MF EQs pot dial near its midpoint for normal listening, and really. Hz to my ears. Feel free to vary the series resisitor following the contour. Follow the Altec Lansing 6. B Phase Correct Crossover. MF EQ link to view the circuit schematic. MF EQ on a 1. 6 ohm 6. The previous paragraph applies as well to the Altec. A or B, although I didnt have either of these drivers on hand to audition. I believe you can build it with confidence. MF EQ equipped 6. Or, if you have already built the original 6. I urge you to remove the L pad. EQ circuit components in its place. Follow the Altec Lansing 6. AB Phase Correct Crossover. MF EQ link to view the circuit schematic. I have also added a note to this schematic concerning differing. High Frequency voice coildiaphragm. See the Recommended Parts Substitutions. Construction Hints page for a bit more detail on this, and other topics, that you may find helpful.