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Hi,Any opinion would be very appreciated.
Question 1:
Should I go for ?:
A) LFE (low level) from surround processor
B) Speaker (high level) from amplifier, feeding subwoofer amplifier
PROS:
A) direct signal path from processor (low distortion) and if XLR used, lower noise
B) similar sound character with main channels (same source)CONS:
A) 2 cross over in the signal path, if processor’s crossover can’t be switched off, and subwoofer cross over can’t be skipped and complete LFE signal
B) 2 amplifiers in the signal path and only main L, R signal (which could be different than LFE)Question 2:
Why we need processor uses cross over for LFE signal ?
Question 3:
Which is better: the processor or the subwoofer crossover ?. Consider that both are hi end products.
Final Question :
Should I pay more for a subwoofer with both input types. I listen 80 music 20 HT, and I have in mind the DVD-A which contains dedicated LFE channel.Thanks in advance.
Follow Ups:
This is a tough answer given the information. What components are you using? Do you use the sub for music?
When you use the high level inputs to a sub and from sub to speaker you loose the advantave of active bi-amping. If you use the processors crossover your amps are only working with the frequencies crossed over. I think the later is the best unless the processor's crossover is not low enough.
MaxCast
Totem Forest – front , Dynaudi0 1.3 MKII- rear +centre, Bryston amplification and preamplification, Audioquest cables
Really depends on the setup, but generally, high-level is far better. I am assuming powered subwoofer, similar impedance to main speakers. A subwoofer's crossover - assuming you buy a quality sub - will beat what is generally put into amps, and will probably be designed with the drivers in mind. Furthermore, good subs give you a lot of control over equalization and volume, so I personally would prefer not mess with the signal until it enters the sub.BTW, XLR doesn't necessarily mean it will be quieter - the primary reason to use high-level inputs, especially with mid-fi gear, is that high-current cabling is insensitive to external fields. Balanced is better than RCA, but not necessarily better than high-level cabling assuming you have a good high-level signal. If the high-level signal is junk, you've got bigger problems on your hands than trying to get clean bass out of the system :).
If you have the system already, try both ways and see. At the calibre of instruments you're suggesting, you probably won't detect a difference, except perhaps higher SPL's in the LFE case.
Best,
Chris
Not sure I completely understand your questions and am not sure they can be answered. It is dangerous to make general assertions about the quality of processors & subs as components used internally can vary widely in quality. Not all active crossovers and filters are of uniform quality. It might well be the internal circuitry of processor A for the sub signal is better than in sub A but the reverse could hold for processor B & sub B.Similarly it well might be that a sub amp, specially designed for the sub could handle low signals better than the main amp.
IMO processor quality varies widely and is responsible for a lot of the negative opinion many hold about digital & surround sound.
John
He cross posted this to other forums.
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