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Post by twisterz on Nov 2, 2006 9:30:02 GMT -7
Mabey this would effect SQ but it seems to me you would go from Preamp to BFD to CX2310 to Power Amps.
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Post by chrisbee on Nov 2, 2006 14:26:20 GMT -7
Mabey this would effect SQ but it seems to me you would go from Preamp to BFD to CX2310 to Power Amps. That would put the fullrange Front Mains signal through the BFD. The BFD treatment should be reserved for subwoofers only.
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Post by Spearmint on Nov 9, 2006 2:10:35 GMT -7
I’ll try to explain it again if I can, then we can break it down hopefully to make it intelligible for those that are interested.
We have two issues here with regards to Norpus’ system
We have two sources (2ch pre & HT processor) requiring access to the main speakers. The 2ch pre does not have bass management the HT proc does have bass management.
Main speakers The 2ch pre goes via CX2310 then MX882 to power amp, the HT proc goes via MX882 to power amp.
Subs The bass out of CX2310 via MX882 to sub amp, the LFE from proc also goes via MX882 to sub amp.
So the MX 882 mixes the 2ch mains from both sources to power amp, also using additional channels of the MX 882 we mix the redirected 2ch and LFE channels.
This now allows us to have both sources playing simultaneously and getting reproduced simultaneously by the speakers and subs.
The benefits for me anyway is the subs operate at 60Hz for 2ch material and 80Hz for HT, since the bass management in the HT proc is set all speakers to small 80Hz. If your 2ch pre has HT by-pass feature then the MX 882 or equivalent is not required.
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Post by chrisbee on Nov 9, 2006 12:22:29 GMT -7
Spearmint
I did a block diagram of your suggested layout but I'm afraid I still can't see why you would need the mixer. What does it bring to the party?
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Post by Spearmint on Nov 9, 2006 15:41:46 GMT -7
Hi Chris,
I had a look at your diagram, must learn to do that myself one day, would certainly help in explaining things.
With ref to your diagram you must be assuming the 2ch pre has HT bypass since it is connected via the HT processor. The use of the mixer is for a 2ch pre without a HT bypass.
On another point when using my plate amps I connect the redirected 2ch bass to the left channel and the LFE to the right channel, in Norpus’ case he only had the one input basically because he was using both channels of his power amp for each IB driver, hence the use of the mixer for his bass as well. When he changes his amps then he can change this on his system as well.
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thudd
Junior Member
Posts: 86
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Post by thudd on Nov 19, 2006 4:22:46 GMT -7
So if you were using *purely* an AV processor, its inbuilt bass management means that you can just feed the LFE output into the BFD and wala away you go. 2ch sources into the processor will have the appropriate bass (say, <80Hz) split off by the processor and sent to the LFE output, right? Because I'm always paranoid that processors or receivers will mess with stereo sources and send the full range signal to the mains. I've known older units that did this - if it wasn't decoding a .1 track then the sub got hung out to dry.
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Post by chrisbee on Nov 19, 2006 4:36:33 GMT -7
I've just used MS Paint to do my block diagrams in a few minutes. Now "Paint" has simply disappeared from my computer! Very odd indeed. I never got round to using the mixer and when I finally plugged it in it was faulty. My wife got a shock off it when she was dusting. A neon test screwdriver glowed brightly so I took the mixer back. The dealer wouldn't give me a swap or refund (despite the mixer being less than 3 weeks old) so it has gone to his workshop for further examination. I shan't be shopping there in future as there is plenty of local competition for my AV funds. The system is sounding great on films with the new digital cable. Particularly on DTS. Which seems to avoid compression issues compared with DD when using my no-sub system.
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