Subterrainean Cinema Build. All Ideas Welcome

subterracineman

Novice Member
Hey Peeps :hiya:

Well here I go with my thread on me new extension incorporating the HD 7.1 PJ cinema under the floor.

Just wanna finalize the plans n get them in to the planners. We've had a footprint agreed in principle, but I didn't mention digging down at that point, so fingers crossed.

I'd like to make sure I'm not dropping an almighty bollock with any aspects of the design. So any and all advice would be greatly appreciated.

Well I've done a sketchup but don't seem able to attach it, so the first bit of advice I'll humbly require is how to do that? :confused:

Then we'll see if anyone has any ideas on how to better use the space, arrange the speakers etc

Many thanks :smashin:

Kevin
 

AdzAV

Standard Member
No idea re the sketchup, but I would def tell building control that you are digging downwards as you may be undermining the foundations etc

After that, you need a damp proof course installed to stop ground water seeping in and making your HT a swimming pool:eek:

Pretty wide ranging question, but I think these are top two on list!!!!!!!!!!!!!
 

subterracineman

Novice Member
No idea re the sketchup, but I would def tell building control that you are digging downwards as you may be undermining the foundations etc

After that, you need a damp proof course installed to stop ground water seeping in and making your HT a swimming pool:eek:

Pretty wide ranging question, but I think these are top two on list!!!!!!!!!!!!!
Thank you, the cinema is going beneath the extension, which is new build about 2m from the old house with a glass link twixt the two. It'll all be going on the plans n into the council so building control will be involved.

In terms of water ingress the build will be tanked below ground level with a geomembrane and I'll include a sump and pump if we find the water table.
 

subterracineman

Novice Member


Ok managed to make it into a jpeg image.

Quick explanation. the pegs are people, the tops of the pegs their rough head positions when seated.

The seats are gonna be curved banquette sofas that I build myself (which is gonna be easier than drawing them on sketchup).

the room is planned to be 6 x 4.5m. The projector will be in the center of the rear wall mounted in a cupboard the other side of the wall with a hole big enough for the image to show through.

Being a retired carpenter and ex car audio junkie I'll be building the speaker enclosures myself. The 4 corner speakers to be mounted in angled baffles (enclosed) with the 3 center ones (c cl and cr) sunk into recesses left in the blockwork with the baffles finished flush with the plaster.

There'll be a low stage (350mm - 2 steps) at the rear to raise the viewing position over the heads in front. the subs will be in here.

I'm undecided about the position of the speakers down the sides, the outside vps are just within a meter of the wall I'm thinking it may be an idea to move these upwards to increase the distance from the ear, whaddaya think?

That'll do for now. All other ideas welcome

ta

Kevin
Yfrog - picturedx4.jpg - Uploaded by subterracineman
 

Attachments

Last edited:

AdzAV

Standard Member
Ah fair enough re the plans -building control etc.

Have you thought about sound insulation and isolation of the room below from the room above? Would be worthwhile building it in now whilst you are mid build rather than retrofit as the retrofit solutions are never that great.

I have no idea re speaker positioning - i think there is a tool that can assist you on the forum somewhere but your sketchup is a great starting place.

IMO I wouldn't tackle speaker enclosures myself - subs perhaps yes, (using your ICE experience might apply in the domestic situation too, but I have no idea) But the full range of speakers will be much better if you invest in manufacturer's own items - £££££££'s go into speaker enclosure designs, are you sure you can do it too?

Good luck with it all

Adz
 

Per156GTA

Well-known Member
Definatley need building regs for digging a basement. You also need to make sure that the tanking is the best possible - you don't want all that lovely kit beconing part of an indoor swimming pool!!!

Get several quotes form builders experienced in doing basements and check their work out where you can - you don't want a cowboy job done here.

Great idea though and an ideal way yo build a cinema room - probably notthe cheapest way of doing it, but where there's a will, there's a way!!

Looking forward to some progress pictures and updates.

Per
 

Jamo218

Novice Member
Hi there,

My advice would be to take specialist advice on the waterproofing. Sorry (Per156GTA) but you don't want to be part of the learning curve for a builder that may have done a couple basements and been lucky thus far. Problems with water in basements happen when perfectly competent general contractors get outside of their area of expertise; I deal with this pretty much every day!
 

The latest video from AVForums

Podcast: Marantz SR7015 & NAD T 778 AVR + Mission LX2 MKII Speaker Reviews, AV & Film News and More
Top Bottom