216 replies to this topic

[Drizt]

i will be very interested to see your graph results now after all these panels.

Great work once again mate

You and me both mate, I'll have to get the measurement gear working again. Not sure what the issue was last time but I blew my stack trying to fix it.

[Drizt]

Loving the new sound, it's sensational.

Problem is the wife loves it too and has commandeered the room so she can play her tuba in here. Nothing like live music in your room to let you know how your system should sound! My wife loves the new set up, and a happy wife is a happy life

Edited by Drizt, 12 December 2011 - 12:03 AM.

[Drizt]

Jen and I watched Super 8 (http://www.imdb.com/title/tt1650062/) last night and holy crap batman that has some really loud, low deep bass. It sounded incredible. What was good though was that we noticed great clarity and speech intelligibility. The treatments are working an absolute treat (pardon the pun).

Extremely happy with the outcome.

[ENIGMA]

How would the measurements differ if you put the panels behind the curtains?

[Drizt]

How would the measurements differ if you put the panels behind the curtains?

Probably not a whole lot. They just don't fit behind the curtains.

[Craigandkim]

Loving the new sound, it's sensational.
Problem is the wife loves it too and has commandeered the room so she can play her tuba in here. Nothing like live music in your room to let you know how your system should sound! My wife loves the new set up, and a happy wife is a happy life

You certainly do notice the difference don't you.

How would the measurements differ if you put the panels behind the curtains?

Possibly would absorb less at the lower end given that the air-gap between them and the wall would be less.

[Drizt]

Finally got the measurement gear working again. No idea what was different this time, I didn't change anything and it started working again. Hmmffff

End result measurements seen below.

[ENIGMA]

Probably not a whole lot. They just don't fit behind the curtains.

You 've done a great job of the room Dritz.

I have a personal preference to keep a room looking simple and hide many of the bits, thats where i would put the panels behind the curtains and move the curtains a bit more in to the room to give space behind.

I think your room looks much more elegant without seeing the panels.

[Drizt]

Fair enough. We like them where they are which is fortuitous as we ain't moving the curtains.

[svenr]

At what frequency do you cross over from the subs to the main speakers? I would start looking into soundfield management to improve the LF response at the relevant seating positions.

[Drizt]

The graphs show my speakers running full range (no subs).

I usually run my speakers crossed over to mono subs at 80Hz, but I don't have the graphs for those, sorry.

What is soundfield management.

Edited by Drizt, 14 December 2011 - 01:45 PM.

[svenr]

Soundfield management is a method of balancing the LF response at more than one listening position by applying simple EQ and delay to the two subs. Toole wrote about it, and it can be easily implemented in Excel and realised with any DSP. In your case, the gain from SFM would increase if you increase the distance between the subs.

I'm happy to cooperate to produce a SFM spreadsheet.

[Drizt]

The subs are staying put where they are but I'm happy to play around with any EQ delays on the subs. I need to re-EQ my subs anyways since I have moved the listening position and speaker positions around.

Do you have a link I could look at?

I have a balanced miniDSP driving my two subs in mono. (The subs are not running in the graphs you have seen in this thread).

[KenTripp]

I have a balanced miniDSP driving my two subs in mono.

Why only mono? Stereo is much more fun.

[bigears]

A great result D, I am picking up some Megasorber p100 for my room upgrade on Monday. Rocks in my head this close to Christmas but hey why not.

Now enjoy the fruits of your labour.

[Drizt]

Why only mono? Stereo is much more fun.

Because I'm using my pre/pro for crossover duties, hence mono subwoofer out.

I'm more than happy enough with multiple subwoofer mono bass.

[Drizt]

A great result D, I am picking up some Megasorber p100 for my room upgrade on Monday. Rocks in my head this close to Christmas but hey why not.

Now enjoy the fruits of your labour.

Thanks mate.

I look forward to seeing your results.

[svenr]

Devantier and Welti "Low frequency optimization using multiple subwoofers"

http://www.wghwoodwo..._subwoofers.pdf

It's really simple:

1) measure the FR from each sub at each critical position
2) add delay, a single parametric EQ and a level to each measured FR
3) add the modified responses from each sub at each position
4) calculate the deviation across all positions as an optimisation measure
5) use the Excel solver to minimise the optimisation measure
6) program your DSP for each sub accordingly and check using measurements

[Drizt]

Cheers.

My subs are equidistant from the listening position so the delays are the same. I just measure them together at the LP and EQ them as one.

[svenr]

Read the paper - the purpose is to treat each of the mono subs individually, and add delay / EQ / gain to each one in order to improve the variability across the listening positions. If you design the spreadsheet accordingly, you can also optimise for flat power at all positions.

[ozcal]

Great work D , most inspirational

[Drizt]

Great work D , most inspirational

Thanks mate.

I have been talking with svenr and it seems I need to take some more measurements.

[Drizt]

Here is the link discussing my sub integration -> http://www.stereo.ne...sub-integration

End result is this:
[ATTACH=CONFIG]39199[/ATTACH]

[Drizt]

Discussions on interpreting listening position measurements can be found here -> http://www.stereo.ne...on-measurements

[Paul Spencer]

Looking good Drizt! Let me guess ... you like black!

You like it, your wife likes it, that makes it about 100 times better.

[Drizt]

Looking good Drizt! Let me guess ... you like black!

You like it, your wife likes it, that makes it about 100 times better.

Love black mate, and it works well for HT usage

The wife love it. I think she loves the fact that we are finally finished them to be honest

[Drizt]

Here is the link discussing my sub integration -> http://www.stereo.ne...sub-integration

End result is this:
[ATTACH=CONFIG]39199[/ATTACH]

After listening to the set up for a while I decided the bass was a bit hot so I have turned the subs down a few dB (3-5). Sounds subjectively better that way.

[Drizt]

I'm chuffed......

My sister and her boyfriend came over tonight and they keep on raving about how the room sounded so different now and how the audio was crystal clear. It is sooooo great when non-audiophiles even notice the difference.

[Drizt]

The final treatment was added today



Just going to go have a listen to it now.

The wife has worked super hard today on it, bless her soul.

There is a black elastic around the back of the tv to hold it on.

[datafone]

Looks great mate

[JohnA]

looking goo indeed mate.
Glad to read you are very happy with the results

[bigears]

Its all come up really well D.

Also you have made the blacks blacker on your Sammy panel too.

Its always good when your visitors notice.

Well done

[Drizt]

thanks everyone

[joz]

Love the work and effort you put in Drizt.
In you opinion which area added the most benefit? That is if you could recognise it.

[Drizt]

Most to least..
Corners
Roof
Back wall
TV cover.

I really like what the roof treatments did.

[hannya]

Very, very impressive Dritz, congrats!

[Drizt]

Thank you very much hannya.