Mission 75(or 73)as instructions

[varsas]

Hi.

Just bought a Mission 75as subwoofer from ebay. Not sure exactly how to hook it up. Do I plug the 'sub' out from my AV receiver to the left hand line input, or do I need a cable splitter to split the AV reciever output and plug it into the L/R line level inputs?

I expect it'll be the same as a 73as.

Thanks in advance.

[OldSkoolRS]

You shouldn't need to use both the l/r connections as the .1 output is monorual anyway. Some people get sidetracked by extra headroom or output by using both connectors, but it's only mixed to the same (mono) power amp anyway, so just use one connector left or right.

Probably worth setting the phase to 0 initially (try turning it to 180 incase this improves the bass) and set any crossover/frequency filter to 'Off' or maximum. Set the gain to about 11-12 o'clock position then use your amp's set up or test tones to set the sub level in the amp's menu.

If in doubt, fine tune by ear, but don't expect the earth to move from this sub, so be realistic with it's output settings rather than trying to get deep vibrations from every little thump on the soundtrack.

Edited by OldSkoolRS on Tuesday 18th March 00:39

[varsas]

Hi.

OK, thanks. It's just some manufacturers (velodyne for instance, see here: http://velodyne.com/pdf/impact/impact_manual_revd.... say you need a 'Y' splitter, which is a bit strange but who am I to argue...I also used to get hum on my KEF 2000 without the second LF terminal being earthed to something.

Using for films only and I'll probably stick to what the AV receiver calibrates it to. This actually sets the level a bit lower then I'm used to in a cinema, but my current sub is a Yamaha YST-FSW 150 so maybe that's why...but certainly yes I'm going for subtlety rather then impact. My philosophy is that if you can hear the sub (as in...oh wow, that explosion sounded great did you hear the sub kick in?) it's probably too loud. I don't like that boomy sound you get at a lot of cinemas at all.

Edited by varsas on Tuesday 18th March 14:05

[OldSkoolRS]

You wouldn't like the demo I went to at the weekend then...They have 8 x 18" subwoofers built into the front wall of their dedicated room. I can't remember how many watts driving it all, but at one point the bass literally physically moved the projector (a large heavy Sony 4K model).

However, I started to find it a bit much myself in the end, so I was quite pleased to go home to my 'small' pair of 15" subs. I tend to set mine a dB or two above where Audyssey calibrates them to, but as I've EQ'd the response really flat they don't boom away all the time, so it's only when a really loud rumble happens that you know they are there...just as it should be IMHO.

No harm in adding a splitter if it solves any hum issues, but otherwise I wouldn't bother.

[varsas]

OK, cool.

I've never really heard a 'proper' sub so should be interesting. It's that woolly, soft, resonating-y noise I hate...where even with speech the sound is so thick and (for want of a better phrase) 'loud' the detail gets lost. You get it lots with gigs too. TBH I reckon my system sounds better then the local cineworld... Went to the BFI IMAX in London and it was pretty amazing, picture was really subtle and intense at the same time with proper deep blacks (something else my local doesn't do well...) and natural colours, while the sound was loud and deep it still retained nuance and detail. I think it's partly the way the films are mixed though, 'Skyfall' sounded really good at the same cineworld cinema...