John Sayers' Recording Studio Design Forum

Hi,

this is my first post and i follow this forum several years now so i know a bit about acoustics and studio designs...

i want to plan/build a nice little studio in my basement of my house...

BECAUSE:

i had a good studio until may 2011 because they raised the rent to an enormous amount so i moved out there... i was room in room, fully AC and window installed already between the 2 rooms... acoustics in the control room was mainly modular resonance and broadband absorbers from a german acousician...

but its gone... and i dont want to use the module absorbers anymore because they deaden the room too much and do nothing below 80 hz... and this sucks
the only thing i want to use further are 6 big diffractal diffusors i built myself out of mdf...

my room dimensions are (sorry metrical only): 6m x 5.80m x 2.10m
i know this is pure horror acoustically... but its the only basement i have...
my main room resonance is 52 hz and several dips at 70 hz 140 hz and so on...
another big problem are the 2 doors in the each rear corner of the room... and they cant be built over unfortunately...

my mains are PMC IB1 powered with Bryston Amps, so i need good bass trapping in this room i think, right?

i totally fell in love with the look / feel of slat resonator walls and soffit mounted speakers...

is it possible to soffit the IB1? because u cant really shelve out the bass lift afterwards without parametrical eq in the monitoring chain right?

ah and btw im a total sketchup noob but i tried to do a first design and played around a bit but i dont know if thats any useful...


please guys help me !!!!!!!!!


thanks in advance for any help

welcome! please update your profile to include your location information. could you also provide details on the desired isolation you need etc. if you already have the desired isolation and only need to treat the space, then soffit mounting (or as has been presented to the forum, in the wall mounting (IWM)) is an option for your monitors plus the slats etc. on the low ceiling though... consider a heavy solid backed cloud angled down in front up to the ceiling just behind your mix position. and use that space overhead for trapping as well as in the soffits.

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Glenn

Hi Glenn,

thanks for the quick reply

sorry for that location thingy, i though i did it...


isolation needs are not that high because i got neighbors but the houses are decoupled with double brick and an air cavity in between... and isolation inhouse is not that important too because in our house everybody is still young and somehow affiliated to my work...


so i just need to treat the room... i would love to build a soffit type front or mount them flush but isnt it dangerous for the +6 dB bass lift? because i really dont want to put an EQ in the chain...

an with sold back cloud you mean absorbtive in the mid/high range but reflective below these frequencies? this cloud has to be at least 20 cm thick i think so when i am 1.80 m tall its getting small in there

or did i get you wrong?

did you have a look on my noobish skp file?

is this any good or total crap?

thanks

soffit mounting should be good and most modern monitors have the appropriate settings to roll off to compensate. since you're mostly seated at the console, have a cloud low over the front and angled up over the desk should not be an problem.

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Glenn

holy....


thanks glenn... u ´re the man!!!!

would you mind to share the skp file with me? because of measurements and stuff...

i really like it alot!!!!! cant wait to build that thing


thx again

try this. properly added side and front slats. added funky poly slat on back wall but could be angled or just absorption.

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Glenn

Hi Gullfo thanks fpr the file....

would it be possible to make the side slat walls a bit longer to have the naked wall behind the listening position covered a bit more? then of course the angle where the slat wall begins in the front gotta be adjusted right? or is the angle not that important?

also i think i would go without soffit mounting... because what i´ve read so far in this forum it is just to complicated/expensive/hard to build for just having it in the basement for 1 year or so... what do you think?

i just dont wanna build this massive thing for having EXPENSIVE Speakers with poor performance in the end... also i´d need phase linear EQ in the chain and that stuff is not in the budget right now or i´d have to tri-amp the speakers and turn down the bass in the crossover... but i think you know about prices of BRYSTON amplification so....


would your design change drastically without soffit mounting? or do recommend to try the soffit mount although all this difficulties? or is it not that difficult as i think?


Thanks again

Andi

it's not as difficult as you think and the benefits are excellent. on the wall behind the slats - some vertical absorbers will do it. if you make the treatment frames modular, you may be able to reuse in another space later.

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Glenn

awesome!

by the way is the angle of the side slat resonator important to the functionality of the soffit front?

and do you have some tips for me because of that low shelf filter? or should i just try my luck without EQ correction?


Thanks

Andi

Glenn?

Help


is it any possible to do that filtering low budget?


Thanks

btw:

here is a little topic about my diffusors i built while i got some spare time...

viewtopic.php?f=3&t=16511&p=116099#p116099


Its in the acoustic forum

Andi

sorry for the delay. i would go with 15 degrees on the side walls if possible or as low as 10 degrees if that extends the wall the way you want it. those diffusers look terrible, you need to ship the diffractals to me right away so i can test them

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Glenn

ok cool... i can build you one... in case you could help me with my filter problem


i need a solution as long as i wait for ATC 110s

Thanks

Glenn

have you checked out the BSC filter Barefoot posted a number of years ago? it's in the speaker section. i believe Siegfreid Linkwitz has some designs on his site (and having helped invent the Linkwitz-Riley filters he may be the best source). http://www.linkwitzlab.com/filters.htm then if you need opamps http://www.mouser.com/Search/Refine.aspx?Keyword=opa627

if not, i recommend a proper cross-over unit in your rack as a means of adjust the LF cut off pending your new monitors. also DIYAudio has numerous circuit designs if that is the route to pursue.

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Glenn