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BJMG



Joined: 09/03/10
Posts: 27
Loc: Manchester / London
Active sub - suggestions / things to consider
      #818812 - 14/03/10 04:56 PM
Hi.

Failed to find a site to review active subs - any suggestions / things to look out for?

Currently using a pair of Mackie HR624's. My control / recording / office / everything room is 3.5m x 3.5m. Hearing everything except the really low end which is about 2m behind where I sit - can't do anything more to treat the room.

Ideally spend up to £500. Half considering one of those room fix thingumies too (KRK or JBL).

Got a big project coming up with some great musicians - want to get the end product as right as I can.

Thanks


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BJMG



Joined: 09/03/10
Posts: 27
Loc: Manchester / London
Re: Active sub - suggestions / things to consider new [Re: BJMG]
      #819069 - 15/03/10 08:30 PM
...I meant to put 'Any suggestions / what should I consider?'


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Happy Birthday Hugh RobjohnsAdministrator
SOS Technical Editor


Joined: 25/07/03
Posts: 21916
Loc: Worcestershire
Re: Active sub - suggestions / things to consider new [Re: BJMG]
      #819131 - 16/03/10 08:34 AM
Your room is square -- the worst possible shape. There will always be a black hole of missing bass at the centre of the room. Adding a sub won't fix that problem -- it's an acoustical issue with the room itself and only serious bass trapping will fix it. If you add a sub, your neighbours will hear it (and doubtless complain) but you won't receive any worthwhile benefit.

hugh

--------------------
Technical Editor, Sound On Sound


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BJMG



Joined: 09/03/10
Posts: 27
Loc: Manchester / London
Re: Active sub - suggestions / things to consider new [Re: Hugh Robjohns]
      #819379 - 16/03/10 10:49 PM
Putting the laws of acoustics and physics aside ( ) for a moment there must be some way of me getting nearer to hearing the truth where I am sat? It's a detached house so noise isn't an issue.

I sit 1m from one side of the room and the low end I am missing is on the wall 2.5m behind me... it might sound bonkers but what if I place the sub back there?

...or would it give me the wrong information if I hook up a sub (on my side of the room), get some familiar material on and put some eq on the monitor sends?

Giles


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johnny h



Joined: 24/07/06
Posts: 3509
Re: Active sub - suggestions / things to consider new [Re: BJMG]
      #819381 - 16/03/10 11:09 PM
Quote BJMG:

Putting the laws of acoustics and physics aside ( ) for a moment there must be some way of me getting nearer to hearing the truth where I am sat? It's a detached house so noise isn't an issue.

I sit 1m from one side of the room and the low end I am missing is on the wall 2.5m behind me... it might sound bonkers but what if I place the sub back there?

...or would it give me the wrong information if I hook up a sub (on my side of the room), get some familiar material on and put some eq on the monitor sends?

Giles




Looks like you'll have to move house..


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_Nuno_



Joined: 20/05/06
Posts: 804
Loc: Cork, Ireland
Re: Active sub - suggestions / things to consider new [Re: BJMG]
      #819385 - 16/03/10 11:45 PM
If there's no chance to treat the room then you could look into ARC. I used it to position and adjust the crossover in my sub so that the frequency was the flattest possible, and then I just let ARC do the rest. The end result was pretty good. I have a few DB peak at around 60 Hz I can't get rid of though, but the rest is pretty good. My room is pretty small as well but it's more like a rectangular corridor with two open corners so it's not so bad.


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Happy Birthday Hugh RobjohnsAdministrator
SOS Technical Editor


Joined: 25/07/03
Posts: 21916
Loc: Worcestershire
Re: Active sub - suggestions / things to consider new [Re: BJMG]
      #819410 - 17/03/10 09:19 AM
Quote BJMG:

Putting the laws of acoustics and physics aside ( ) for a moment...




That's the whole point! You can't. There is a fundamental problem with your room and only a fundamental solution can deal with it.

Quote:

there must be some way of me getting nearer to hearing the truth where I am sat?




Install lots of bass trapping, or wear headphones.

Quote:

I sit 1m from one side of the room and the low end I am missing is on the wall 2.5m behind me...




That'll be those old annoying laws of physics again then...

Quote:

it might sound bonkers but what if I place the sub back there?




It won't make any difference to wear you're sitting. The fundamental problem of a square room is that the LF inherently cancels itself out in the middle of the room, no matter how much energy you pump in.

Deal with the problem or find a better room. A sub really won't help. Sorry.

Hugh

--------------------
Technical Editor, Sound On Sound


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BJMG



Joined: 09/03/10
Posts: 27
Loc: Manchester / London
Re: Active sub - suggestions / things to consider new [Re: _Nuno_]
      #819413 - 17/03/10 09:31 AM
Just had a look at the ARC website and it looks as complicated (for me) as moving house!

I've got to get my next project on the money, so maybe i'll just get everything in as clean as possible, do all the editing / initial mixing at home then take it to a commercial studio that's got the bank roll and brain power that I am missing.

Might get a sub and have a play around - have discovered lots of ways of not doing things how you should that can actually work.

At least i'll then have one for when I do move house (divorce on the cards so better spend what money I have quick!)


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BJMG



Joined: 09/03/10
Posts: 27
Loc: Manchester / London
Re: Active sub - suggestions / things to consider new [Re: BJMG]
      #819416 - 17/03/10 09:42 AM
Sorry Hugh - was mid waffle when you posted.

I use headphones and a number of other listening sources, so it looks like I can do no more.

...which is a shame as it's a great work space that works really well on every other level.


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BJMG



Joined: 09/03/10
Posts: 27
Loc: Manchester / London
Re: Active sub - suggestions / things to consider new [Re: Hugh Robjohns]
      #819440 - 17/03/10 10:59 AM
Already got some Sony MDR-7509's which are great, but should I look to spend the sub money on some HD650's - would this give me a more truthful picture?


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