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Old Studio rebuild

Customising, building or repairing your own gear? Need help with acoustic treatment or soundproofing? Ask away…

Re: Old Studio rebuild

Postby Folderol » Thu Oct 12, 2017 8:37 pm

Sam Spoons wrote:I'll go with FST for mic tie lines and will run enough Cat5 for any future expansion.
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Re: Old Studio rebuild

Postby Sam Spoons » Thu Oct 12, 2017 9:01 pm

:bouncy: just planning as I type, I have the trunking prepared, I have built the space into the studding with a pair of horizontal studs running around the room 4" apart and at waist height. That will be capped with 6" UPVC boards, flush boxes will take care of the mains and I'll build signal lines in as well (mains clipped along the top of the space, signal lying along the bottom as I don't envisage altering the mains distribution after it's finished, 12 double sockets should cover all my future needs). It won't be too difficult to add extra audio lines but, as you suggest, it'd be nice not to have to. To that end I'm looking for some punched plates to house XLRs and TRS jacks for various functions (mics, line level returns to monitors and headphones). 1" are not really suitable and there are a couple of systems that fit standard octet boxes but they are limited regarding layout. If I don't find anything suitable ready made I'll make my own.
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Re: Old Studio rebuild

Postby Sam Spoons » Sat Nov 04, 2017 7:12 pm

Ok, just about finished installing the power sockets to the trunking, I've decided to run a Cat5 around the room and use the X32 Rack as a stagebox next to the drums for now, I'll put some audio tie lines in later when I know where everything os going to live.

I'm planning acoustic treatment and can't decide between a ready made solution like this http://www.ebay.co.uk/itm/Pro-coustix-Ultraflex-Studio-pack-One-24x-Acoustic-foam-Tiles-4x-Bass-Traps/182268320067?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649, thinking a pack like that one plus a load of extra bass traps or make my own, in which case is this https://www.travisperkins.co.uk/Rockwool-RWA45-Acoustic-Insulation-Slab-100mm-x-1200mm-x-600mm-%282-88m2-Pack%29/p/961938 suitable rock wool, says is's for 'sound insulation'?
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Re: Old Studio rebuild

Postby James Perrett » Sat Nov 04, 2017 9:03 pm

The Rockwool that you linked to is only 45kg/m3 whereas the usual advice for internal treatment is to go for something a bit denser like RW3 (or Knauf RS60) which is 60kg/m3.
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Re: Old Studio rebuild

Postby Sam Spoons » Sat Nov 04, 2017 9:50 pm

I'm looking for acoustic treatment not 'sound proofing', is the 60kg/cuM still required? It is purely for bass traps and full band absorbers.
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Re: Old Studio rebuild

Postby James Perrett » Sun Nov 05, 2017 10:42 pm

It is especially important for panel absorbers. Higher density means that the absorbers will work down to a lower frequency. Some people would even suggest going for the 100kg/m3 stuff but apparently it doesn't work as well at high frequencies so 60 is a good compromise. Specialist suppliers (like Sheffield Insulation) will have no problems supplying these for prices that are possibly better than those on the Travis Perkins website if you are after a reasonable quantity.
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Re: Old Studio rebuild

Postby Sam Spoons » Sun Nov 05, 2017 11:26 pm

Thanks James, I'm nearly at that stage and need to start sourcing materials so any opinion on the cheap(ish) "Pro-coustix Ultraflex" kit I linked to above? Most likely though I'll go for RW3 or equivalent and make my own.
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Re: Old Studio rebuild

Postby James Perrett » Mon Nov 06, 2017 12:05 am

The kit that you link to has pictures that are a bit deceptive - the tiles are actually smaller and thinner than most decent acoustic tiles - you really need something getting on for double the thickness and you need to make sure that it is the correct type of foam. If you really want foam then I'd stick with well known suppliers with full published specifications.

Not sure if I've said this already but, if you are making your own with a fabric covering then go for the proper Cara fabric as it is slightly stretchy which makes it very easy to create good looking panels. I've tried using both hessian and dust sheets in the past which were slightly cheaper (but not massively cheaper) and the Cara covered panels look so much better. Cara is also fire resistant.
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Re: Old Studio rebuild

Postby Sam Spoons » Mon Nov 06, 2017 10:52 am

Yeah, the size and thickness hadn't escaped my notice. I'll go the DIY route then :)
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Re: Old Studio rebuild

Postby Martin Walker » Mon Nov 06, 2017 6:33 pm

Hi Sam!

I'd agree with James re recommending 60Kg/m3, as the optimum performance/price point.

The slightly cheaper 45Kg/m3 also sags under its own weight, making it more difficult to look smart in a casing.


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Re: Old Studio rebuild

Postby Sam Spoons » Mon Nov 06, 2017 7:16 pm

Thanks, I had a wander round B&Q this morning and the stuff Rockwool refer to as 'Sound Insulation' felt distinctly floppy :headbang:

I don't need a huge quantity, the room is roughly 4 x 4m and I'm thinking two bass traps around 1200 x 400 mm in the corners and another 1500 x 800 mm behind the monitors (there is an alcove there). Plus 1200 x 600 x 65 mm panels spaced off the walls and ceiling by 50mm at the mirror points and on the back wall. I will see how it sounds with that before putting extra absorbers in (though I'll probably stick a small panel on the ceiling over the snare drum.

I'll give Sheffield Insulation a ring in the morning and ask them where I can get a small quantity from.

The bass traps will be broadband absorbers actually and the next step would be more of those in the other two corners. I don't want to take all the life out of the room with too much HF absorption.
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Re: Old Studio rebuild

Postby Music Wolf » Mon Nov 06, 2017 8:08 pm

Sam

I'm pretty sure that I used these people https://www.directinsulation.com/product-page/rockwool-rw3-prorox-sl930-100mm-2-88m2. It was around £20 for delivery.

I used Cara fabric to cover which was easy to work with and didn't look too bad even after I'd bodged it. The fabric was quite expensive but looked a whole lot better than previous attempts where I'd used thin cotton sheet (even after I'd tie-dyed it).
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Re: Old Studio rebuild

Postby James Perrett » Tue Nov 07, 2017 12:17 am

Sam Spoons wrote:I'll give Sheffield Insulation a ring in the morning and ask them where I can get a small quantity from.

Studiospares also sell RW3 in single bales - but only in 50mm thickness so you'll need to use 2 panels at a time to get 100mm.
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Re: Old Studio rebuild

Postby Sam Spoons » Wed Nov 08, 2017 2:59 pm

I'll post some pics next week before the treatment goes in but it's all coming together nicely. So it's time to decide on floor covering. I had contemplated just hard waxing the plywood and bunging a rug or two in but I'm leaning towards some kind of carpet (or probably even carpet tiles for convenience and speed). I realise that the thinner the carpet the higher the cut-off frequency of it's sound absorbency so tiles will take out less (well only higher) top end than a thick carpet with underlay. I guess most studios live with it though so any thoughts?
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Re: Old Studio rebuild

Postby James Perrett » Wed Nov 08, 2017 4:40 pm

I think most people rely on wall and ceiling treatment to do most of the work. My studio racks and chairs have wheels so thick carpet is out - I just have the floor covered in close weave carpet.
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