Bought an LX521.4 from a fellow member here but without the subs. The L26RO4Y were on sale from a local dealer, but it turns out they cannot deliver four. I was going to shell out the money for the original drivers in order to have a turnkey solution and get an impression of the original sound as it was intended by SL himself before potentially making any changes.
The dealing having stood me up, I am reconsidering. The L26 may well be the 10" with the largest linear excursion (+/- 15 mm), but an XXLS12 will fit the baffle and move even more air (+50% area and only -17% excursion). A lowly SLS12 will also fit physically, move only 15% less air than the L26 and have much better efficiency.
There are also various 10" that move between 50 and 20% less air but are either much cheaper or much more efficient.
So my questions are:
1) How much do the woofers on the LX521 actually move with real music (not home theater) at 90 - 95 dB at the listening position?
2) Which parameter will change the frequency response of the baffle most? Is it enough to choose a woofer with matching fs and Qts (assuming the sensitivity will be dealt with by changing gain)? Or does one have to consider mms and Vas? I can imagine a lightweight cone would be influenced more by the air load in the baffle cavity, but then again we are talking V- and not W-baffle.
The dealing having stood me up, I am reconsidering. The L26 may well be the 10" with the largest linear excursion (+/- 15 mm), but an XXLS12 will fit the baffle and move even more air (+50% area and only -17% excursion). A lowly SLS12 will also fit physically, move only 15% less air than the L26 and have much better efficiency.
There are also various 10" that move between 50 and 20% less air but are either much cheaper or much more efficient.
So my questions are:
1) How much do the woofers on the LX521 actually move with real music (not home theater) at 90 - 95 dB at the listening position?
2) Which parameter will change the frequency response of the baffle most? Is it enough to choose a woofer with matching fs and Qts (assuming the sensitivity will be dealt with by changing gain)? Or does one have to consider mms and Vas? I can imagine a lightweight cone would be influenced more by the air load in the baffle cavity, but then again we are talking V- and not W-baffle.
The woofers move a lot! I have several acoustic jazz recordings that make them move 8-10mm at regular (loud) listening levels. I have not seen them bottom but I'm sure I could do it. They are much more bottom out proof then the old 10"xls that was in the Orion. I will say they are nice and quiet even when moving this much. If it were me I would probably stick with the L26.
If you are you using the dsp crossover you could certainly try other woofers but it's gonna take some effort to get them dialed in.
If you are you using the dsp crossover you could certainly try other woofers but it's gonna take some effort to get them dialed in.
Last edited:
I've seen Dayton RSS subs used in swap for the Orion, so maybe?
The new RSS HE and Ultimax are designed for small sealed, so likely those won't work.
Later,
Wolf
The new RSS HE and Ultimax are designed for small sealed, so likely those won't work.
Later,
Wolf
When things go well there are too many things to troubleshoot- Is it my build, is it my wiring, it is my crossover, is it my room, my music my amps or do I just not like it. (Circle of confusion) etc etc.
So now I always build it to spec before embarking on my own wild journey.
Now, having said that, have you looked at the A, B, C, Dipole design Help File snd Spreadsheet by John Krevskovsky?
David Ralph's Speaker Pages - Home of the Windows Passive Crossover Designer (WinPCD)
So now I always build it to spec before embarking on my own wild journey.
Now, having said that, have you looked at the A, B, C, Dipole design Help File snd Spreadsheet by John Krevskovsky?
David Ralph's Speaker Pages - Home of the Windows Passive Crossover Designer (WinPCD)