Regis
08-16-2004, 12:08 PM
Between the L-150 and the L-150A's. Probably because the L-150A uses a variant of the vaunted 3113B crossover, found in the L-112 and the L-96. My unmod'd L-150's sounded somewhat weak with none of the presence and power of my old L-65A's. My little brother brought up his L-150's to be mod'd, but I didn't know they were A models, so I decided to A-B compare the two. My little brother's L-150A's sound just like my heavily modified speakers. I could've saved myself a whole lot of trouble and just swapped out the crossovers first! I didn't know they'd make that much of a difference. Same speaker, same cab, almost identical components. I take back everything I said about the 128H woofer. It is plenty healthy. If you look at the L-150 crossover, there's a bunch of 'extra' discrete components in the LF. Look at the L-150A and it is very simple, one resistor in the LF loop, vs four for the L-150. Even the mid-range is different and there's far more projection and details in the "A" than the other.
Compare the two for yourself, the L-150 X-over
http://manuals.harman.com/JBL/HOM/Technical%20Sheet/L150%20ts.pdf
L-150A X-over
http://manuals.harman.com/JBL/HOM/Technical%20Sheet/L150%20ts.pdf
One good thing about the A-B test, is that I had FOUR of these big speakers arrayed on both sides of the entertainment center. It looked like a wall of sound! As Bo said about the gear, "...A lot of gear is great; more is better. Too much gear is just right..." That's for sure. The sound output was astonishing. Two 2214's, two 128H's, four LE5's and a pair of 033's and 044's rounded it out! Bass output was comparable to many theatre's I've been to and even night clubs. The big Sansui G had no sweat beating the walls of my listening room half to death! I was grinning like a mad scientist. Put some 'House' music on and had the grills off. What a show, the black and white woofer cones were pumping furiously! Now I've got to go out and get another pair of these things. Damn you Bo!
Compare the two for yourself, the L-150 X-over
http://manuals.harman.com/JBL/HOM/Technical%20Sheet/L150%20ts.pdf
L-150A X-over
http://manuals.harman.com/JBL/HOM/Technical%20Sheet/L150%20ts.pdf
One good thing about the A-B test, is that I had FOUR of these big speakers arrayed on both sides of the entertainment center. It looked like a wall of sound! As Bo said about the gear, "...A lot of gear is great; more is better. Too much gear is just right..." That's for sure. The sound output was astonishing. Two 2214's, two 128H's, four LE5's and a pair of 033's and 044's rounded it out! Bass output was comparable to many theatre's I've been to and even night clubs. The big Sansui G had no sweat beating the walls of my listening room half to death! I was grinning like a mad scientist. Put some 'House' music on and had the grills off. What a show, the black and white woofer cones were pumping furiously! Now I've got to go out and get another pair of these things. Damn you Bo!