The information on the FAQ page concerning the bass mix is rather good,
however, I use the n-Vi with large front (SBL) and small rear (Aelite One) speakers, but WITHOUT sub (and without centre).
As far as I know in any case the sub bass information is partially (reduced level) redirected to the large speakers.
Now should I select small or large for the rear speakers on the n-Vi?
When I select small: is the rear bass information lost or is it redirected to the front speakers?

The Aelite 1s should be classed as large speakers. They have a frequency response down to 40hz.

I'm not sure where the bass information gets sent.

quote:

Originally posted by Margan:
The information on the FAQ page concerning the bass mix is rather good,
however, I use the n-Vi with large front (SBL) and small rear (Aelite One) speakers, but WITHOUT sub (and without centre).
As far as I know in any case the sub bass information is partially (reduced level) redirected to the large speakers.
Now should I select small or large for the rear speakers on the n-Vi?
When I select small: is the rear bass information lost or is it redirected to the front speakers?

Yes, technically a portion of the LF info from centre/surround speakers will get routed to the fronts, when selected as small.

This is material dependant.

For instance, DTV audio via the processor will probably have little surround info, let alone LF material, but DD/DTS digital streams will contain more information. (This also explains why the BBC voiceover is so boomy when I have BM on, as there is a lot of dialog info, compared to surrounds)

For the more technically minded, a veritable fountain of information on Dolby specs can be found here:-

http://www.dolby.com/resources/tech_library/index.cfm

Thank both of you.

Frank, 40 Hz really?, they are rather small (compared to SBLs).

AV@naim (does your friends call you this way? :-)), do I understand this correctly:
- if I select small for the rear speakers: the LF info from the rear channels is only partially send to the front channels, so I loose LF level
- if I select large for the rear speakers: I get the full LF info from them, but the Aelite One's bass is not as good and deep as the SBL's bass, so I loose quality and VLF level
- in any case I always get only a portion of the LF info from the centre channel and only a portion of the LF info from the LF/bass channel

more to the point what happens to the .1 LFE channel output when there is no sub?

quote:

HELP there was a reply here a minute ago from AV @ Naim

OK thanks.

I was confusing your use of the term LF. I thought you were only referring to the redirection of the lower frequencies in the "5" part of the 5.1 signal from small speakers to large front speakers, not the .1 LFE aswell.

ok, my use of the word "portion" is ambiguous.

I was meaning that if you set centre/surround small (with no sub present), this routes all DD/DTS .1 info to the fronts, but you may not hear anything below the relative cut-off point of that speaker. With PLII/NEO:6, there may not be very much LF there to start with, so you wont hear much extra at the fronts.

To sum up when speakers are small:-

-no LF info is lost, is it re-routed to front speakers (but frequency loss may occur in the speaker itself)

-exeption to the rule:- if fronts are small and you have no sub - then sub is lost (this is an illegal combination in Dolby's eyes anyway...).