Originally Posted by Rocks991s
Thanks! Could be a nice alternative.
Price difference not that much of a concern but I’m intrigued with your suggestion.
Any speaker stand recommendations?
Which ML center channel speaker would go best with the 35XTs?
Would still like to use the MC2105 amp to power the 35XT and use an AVR to power the center channel. I’d also pick up a nice powered sub to round out what I guess would now be a 3.1 system for home theatre use.
How do you think a pair of 35XTs and a good sub would compare to a pair of 40 or 60XT towers in stereo mode?
Time for some more research.
By the way, I’m located in Delaware.
Thanks again for your reply.
Sound & Vision tested and measured the Motion 40, -3db point of 48hz, the Motion 30 center 86hz, the 60XT at 42hz, the 35XT at 69hz and the Motion 50XT at 64hz.
Subwoofers they have measured that have a -3db point of 20hz or below start at $500 so even with an XT system you gain at least 20hz in extension using a sub/stand mount option.
One might argue by looking at the charts that the 35XT measure at least as well as the 60XT.
I prefer sealed servo subs despite the fact that they need far more power to achieve the same sound pressure level as their ported counterpart with its much bigger cabinet.
Make sure that when considering subs you make a cardboard cutout to understand just how big it will be because some people who order even 12" ported subs are shocked at their size when they hit the door.
For example here is the size of a 12" sealed servo Rhythmik F12G, (around $1000 assuming you are in the US): 15-3/4"(W) x 15-3/4" (H )x 17"(D) - (18-1/2" D with grille)
Here is the ported version with same size amp and 12" driver, the ported servo LVX12: 17"(W) x 20-1/2" (H )x 22"(D) - (24" D with grille and control knobs)
Here is a comparison using their information of the differences in output at 20hz...note that using two smaller sealed 12" subs will be approximately equal to one larger 15" ported sub.
"At 20 Hz, our subs (Rhythmik) vary in their maximum output capability. The output at 20 Hz is shown relative to F12."
Note: Two identical subs add +6db
+3db = 1.4 times sound pressure loudness
+6db = twice sound pressure loudness
+10db = 3.2 times sound pressure loudness
DIFFERENCE PORTED VERSIONS VS SEALED VERSIONS IN TERMS OF LOUDNESS
L12: -1.0db 12" 300watt sealed
F12: 0.0db 12" 400watt sealed
F15HP: +5.5db 15" 600watt sealed
F18: +7.5db 18" 900watt sealed
LV12R: +2.5db 12" 300watt ported +3.5 db difference
LVX12: +4db 12" 400watt ported +4 db difference
FV15HP: +11db 15" 600watt ported +5.5 db difference
FV18: +14db 18" 900watt ported +6.5 db difference
This is more information on what you gain when you use a crossover to let the subwoofer handle the lowest octave; it applies if you use it, as I do, with a tower speaker as well:
Win 1. Since you are now not putting in 20 Hertz 80 Hertz into the mains you are not using up the available low frequency cone movement with bass, so the low frequency cone in your main speaker is able to play its higher frequencies (up to it’s crossover point) much more cleanly. You get an apparent 6dB or more dynamic range. You can play your system louder, and also with less compression distortion in the low frequency driver when you are having that Saturday night dance party and you’re playing urban b
Win 2. Since you are not putting bass into that same driver you are not Doppler modulating everything between 80 and 600, or whatever the next crossover point is. This means cleaner mids. By far.
Win 3. You are not sucking current out of your main power amp at low frequencies, so there is more current reserve to play those highs louder.
Win 4. Since the cones are not moving as far at the low frequencies the driver itself is not generating as much back EMF therefore the damping factor and all of its issues are greatly negated. And you do not need to run silver plated cold water pipes to your mains as speaker wires because there is far less current draw by the speakers.
Win 5. Frequencies below 80 are now not causing transient intermodulation distortion with the higher frequencies (and vice versa) in your power amp. Cleaner still.