In Reply to: jbl posted new data recently posted by Sam P. on May 09, 2002 at 17:52:26:
Sam,
I have been to the Lansing Heritage (JBL) site and both of the ALtec sites. I am a little confused on the efficiency of the 4648's, I think the pair of 2226J's in parallel for 8 ohm result is 100db/watt. By the way, the 2226J's used single in a cabinet even though 16 ohms works very nice with my 3677 cabinets with the 2418driver on the 2373. I used the 1.6 khz high pass from Parts Express and using 1.2 mh coil (I actually bought it for another project"14 guage") the proper value for that should be 1.4 mh. I used 15 ohm resistor shunt with 30 ohm series for attenuation with .47 ufd cap on the 30 ohm. (special note here: with my good friends come over with their 2A3 Paramour's, I just double another 30 ohm over the 30 ohm resistor already in place. The 2A3's have great midrange"magical comes to mind" but need that extra 3-4 db less attenuation. My normal amp is Marantz 2215B (15 watts per channel @ 8 ohms, so at 16 ohms maybe 8 watts) In my 12' X 16' living room I still get 105-108 db cleanly at the seated position approx 7' from each speaker. Room placement makes big difference with 2226's I have to mave away from back wall at least 8" to 1'.
Sorry to bore everyone to sleep now, I'll quit for now.
Regards, Ron
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