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Question about passive and active subs for Atmos
Old 12th June 2019
Here for the gear
Question about passive and active subs for Atmos

We are in the process of building up our main mix room to be Atmos certified. Our current sub is a little bit under powered and we are on the search for a new one. We have the MTRX with the SPQ card that is going to be doing all of the management, filtering as needed, delays, etc.

The Dolby certification spreadsheet lists a whole bunch of passive cinema subs, along with the regular powered subs for recording studios. For instance, the Genelec 7382A gets us over the hump to be qualified, but the damn thing is $10.5k! Alternatively, we could go with something like a passive Christie S118LP that is around $1000 that also gets us over the hump in terms of power. We would also need an amp of course, but it is still a huge price difference at the end of the day. I know there are things like AES inputs and that sort of thing that make it more expensive,

I'm curious if there would be a huge difference from an listening/mixing perspective, with the nature of LFE, between the 2?

What are you getting for that extra $7-8K (after we get an amp as well)

Old 12th June 2019
Lives for gear

are the neumann kh 805/kh810 subs also dolby certified? can highly recommend them while imo the genelecs are way too expensive...
Old 13th June 2019
Lives for gear

It depends on your room, listening distance and other things. I doen't really make sense to recommend a sub without knowing some basic parameters. For theatrical Atmos the sub needs to reproduce 95db SPL+20dB of headroom at listening position without distorting.
Old 13th June 2019
Lives for gear

my recommendation was made upon the suggested genelec subs (assuming they fulfill specs) and my point is that three kh805 will get you in ample spl for less money.
Old 4 weeks ago
Here for the gear
Thanks for the responses, and the recommend of the Nuemann. Unfortunately, it doesn't pack enough power for the room (see the link)

The sub just needs to pass muster when it comes to the Dolby certification process. There is a spreadsheet that they send you that has a bunch of prebuilt lists in it, containing dozens of pieces of gear (see attached). There are lots of active subs listed as well, but so many just don't have the power to make the spreadsheet in the green (any colored cells indicate something that is under powered and needs to be addressed).

Quite the process!
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