New Posts  All Forums:Forum Nav:

Downunder Theatre MKII - Page 5

post #121 of 193
1/17/12 at 11:59am
Hi Peter,

Well I feel stupid ! Those pictures were supposed to be posted in MY build thread! Thats what you get for having multiple AVS windows open I guess. I do apologize. I'm going to get them removed ASAP.

**All done** Wow, talk about poor form posting your own pics in someone else's thread!

Good luck with your build and don't worry about the time it takes, the journey is half the fun!

Cheers
Jamie
Reply
Reply

AVS Top Picks

post #122 of 193
1/17/12 at 12:04pm
Thread Starter 
Quote:
Originally Posted by wilsonj View Post

Hi Peter,

Well I feel stupid ! Those pictures were supposed to be posted in MY build thread! Thats what you get for having multiple AVS windows open I guess. I do apologize. I'm going to get them removed ASAP.

ROLF, I thought it a little odd

Looks awesome though.
Reply
Reply
post #123 of 193
1/17/12 at 3:00pm
I don't care whose photos they were, it was just nice to see some building work posted on Peter's thread! I had to go back and read up on his dog house building just to have something to read!
Reply
Reply
post #124 of 193
1/17/12 at 4:30pm
Quote:
Originally Posted by dingaling2004 View Post

i don't care whose photos they were, it was just nice to see some building work posted on peter's thread! I had to go back and read up on his dog house building just to have something to read!

lol!
Reply
Reply
post #125 of 193
1/17/12 at 6:24pm
Quote:
Originally Posted by wilsonj View Post

Hi Peter,

Well I feel stupid ! Those pictures were supposed to be posted in MY build thread! Thats what you get for having multiple AVS windows open I guess. I do apologize. I'm going to get them removed ASAP.

**All done** Wow, talk about poor form posting your own pics in someone else's thread!

Good luck with your build and don't worry about the time it takes, the journey is half the fun!

Cheers
Jamie

LOL ! I thought it seemed a bit odd, but of course anything goes in a "Downunder" thread !
Reply
Reply
post #126 of 193
1/17/12 at 7:05pm
Thread Starter 
Laugh it up fellas!

I'll be laughing when I am buying a 4k projector for 300 bucks.....

.....actually on that - the maximum screen size for my room is like 92". You can buy a TV about that size these days.......

....crossing fingers for a bumper year and bonus...back to work
Reply
Reply
post #127 of 193
1/28/12 at 1:55am
Thread Starter 
Well a few minor updates, as "updatedess" as I get.....

Finished tidying up the cornice etc for the rack:



Finished the study fitout (Started October 2009.....) you can see I get things done quickly, where I will be scheming and planning the dedicated room for the next few years:





Reply
Reply
post #128 of 193
1/28/12 at 1:56am
Thread Starter 
Oh - and I put the grills on the speakers in the living room:



I am 99% sure these are what I will use for he theater - basically an AMT Tweeter made by Mundorf and a 6.5" PHL mid - all driven by QSC DCA/DSP's to fully active

Before grill:



With grill:

Reply
Reply
post #129 of 193
1/28/12 at 2:20am
I love that computer rack. The whole book shelves and rack looks great.

I hope to do something similar also. And that veneer is awesome on the sub. I dont have the money yet but I do plan on getting some veneer from Briggs soon. Soon as in 2 months from now.

I hope to get a 12-16 closed computer rack in the next few months also. I always worry about them cooling properly when the door is shut. But leaving the door open is just to loud for me.

BUT once again glad to see the progress and I hope you enjoyed your Australia Day.
Reply
Reply
post #130 of 193
1/28/12 at 2:23am
Thread Starter 
Quote:
Originally Posted by chrapladm View Post

I always worry about them cooling properly when the door is shut.

Australia Day was good, had yesterday off too which was nice.

The rack has a 100mm conduit (PVC) running to the top for cables and another one for ventilation - I can hook a powered fan to that when the rack is full and needs more air. At the moment its fine
Reply
Reply
post #131 of 193
1/28/12 at 2:45am
Hey Peter, those speakers look great. And the veneer on the sub.... Just awesome. Wonder how much it would cost to veneer 2x DTS10 subs! Seems a shame to cover those speakers with grills... They look finished but I liked the look of them au naturale. study looks excellent as well. Looking forward to catching up Sunday. Greg.
Reply
Reply
post #132 of 193
3/3/12 at 8:50pm
Thread Starter 
So I finally got my sound card and mic working!

So I ran a few test this afternoon. I'm not at all experienced with any of this so if there is a massive error in all this please don't hesitate to point it out.

Before EQ





After EQ



Reply
Reply
post #133 of 193
3/4/12 at 2:21pm
Thread Starter 
Here is the L&R - both near field and at the seating position. To be honest, I don't even know where to begin

I guess I should EQ the seating position? I am a little (ok very) worried about damaging the drivers

Reply
Reply
post #134 of 193
3/4/12 at 3:37pm
Hey Peter, very pretty pictures if you want a more intelligent comment re equalization you will need to ask someone else!
Reply
Reply
post #135 of 193
3/4/12 at 6:47pm
Hi Peter,

For L+R I suggest some 1/3 or 1/6th octave smoothing, and then EQ from there.

Cheers,
Reply
Reply
post #136 of 193
3/4/12 at 6:49pm
Oh ... and the 'After EQ' on the sub looks great !!

Cheers,
Reply
Reply
post #137 of 193
3/4/12 at 7:27pm
Quote:
Originally Posted by Elill View Post

Here is the L&R - both near field and at the seating position. To be honest, I don't even know where to begin

Begin by applauding. That nearfield response is phenomenal. What speaker is it, measured at 1 meter?

Not sure about the notch. Might be a baffle reflection, something causing a second arrival an inch or less longer than the direct path.

Quote:


I guess I should EQ the seating position? I am a little (ok very) worried about damaging the drivers

Show us the distant curves with a 1/12th octave smoother to take the grass off, so we can see the underlying curve.

What EQ unit will you be using?
Reply
Reply
post #138 of 193
3/4/12 at 7:50pm
Thread Starter 
G'day Roger, good to hear from you.

I did the near field at about 1ft - too close?

The speakers were the last custom made job by Aslan Acoustics here in Sydney before Andrew retired. I designed the box, his driver array - a 6.5" mid and an AMT tweeter made in Germany

EQ - its the QSC DSP4 for the sub and DSP 30 for the L and R

Used with the QSC DCA amps - this is a sweet combination

If I find some time later I'll boot the dogs out and measure again (the test tones freak out our girl).
Reply
Reply
post #139 of 193
3/5/12 at 2:41am
Thread Starter 
Now that I know what octave smoothing is

I'll take some more measurements tomorrow at around 1m distance

Is that sort of roll off at the higher frequencies considered "normal"?

Reply
Reply
post #140 of 193
3/5/12 at 12:14pm
Quote:
Originally Posted by Elill View Post

I'll take some more measurements tomorrow at around 1m distance

Notice that the 10 kHz notch does not appear in the MLP plots. So you might have been too close. Dunno. The 1m plots might tell us more.

Quote:


Is that sort of roll off at the higher frequencies considered "normal"?

Some rolloff is normal. If you have an EQ handy, I would try pulling down the broad rise around 1.5 kHz, about 6 dB worth. Just to see how that changes the sound.

But you say they sound good already!
Reply
Reply
post #141 of 193
3/5/12 at 2:18pm
Thread Starter 
Ok, ran them again. Here is the Left and Right (1m on axis, 1m at 45 degrees off, and at seating position)





Here is my current crossover arrangement:

Reply
Reply
post #142 of 193
3/5/12 at 2:24pm
Thread Starter 
I think I should push down the HPF on the mid to perhaps 70hz - stop some of the roll off at 80hz.....I wish QSC had higher slopes

With the rest of it should I do what I did with the sub and just boost all of the dips?

i.e.
136hz
167hz
196hz
262hz
331hz
619hz
3900hz
9000hz
1560hz

and pull down where necessary

Edit: I got to say, this is heaps of fun/interesting
Reply
Reply
post #143 of 193
3/7/12 at 4:54pm
Thread Starter 
Here is the seating position, L and R, pre EQ and post EQ



Reply
Reply
post #144 of 193
3/8/12 at 1:31pm
Quote:
Originally Posted by Elill View Post

I think I should push down the HPF on the mid to perhaps 70hz - stop some of the roll off at 80hz...

That depends on how it splices with the sub.

Quote:
With the rest of it should I do what I did with the sub and just boost all of the dips?

No. Neither. These responses look damn fine.

What are the EQ corrections you applied to one of the channels? Just to get an idea.

Quote:
Edit: I got to say, this is heaps of fun/interesting

Isn't it? So, is it sounding any better? It's a pretty subtle change.
Reply
Reply
post #145 of 193
3/10/12 at 2:39am
Thread Starter 
Quote:
Originally Posted by Roger Dressler View Post

What are the EQ corrections you applied to one of the channels? Just to get an idea.

Here are the two EQ. I tried to boost it out at the higher end, but it didn't doo much so I'll just leave it alone.





Its interesting that the right needed so much, whereas the left didn't change much/need much. I thought the left would be troublesome as it is closest to the a wall/window, whereas the right sits in the middle of a large wall more or less

Quote:
Originally Posted by Roger Dressler View Post

Isn't it? So, is it sounding any better? It's a pretty subtle change.

The bass is very, very noticeable, that has worked a treat. With the L and R the dialogue seems a little clearer/defined to me.

I suppose the cool thing about all this is when I heard the big brother to my speakers, I was completely in awe. These things:



They have a face only a mother could love.

Its nice to actually see the measurements confirm that they're a good speaker (off axis seems pretty ok) and it wasn't just some emotional attachment I had to them on hearing them for the first time.

All in all, I am really happy with them. I'll be using the same thing come time to kick start the theater again, now that I have a formula that I knows works
Reply
Reply
post #146 of 193
3/10/12 at 3:04am
Quote:
Originally Posted by Elill View Post

Here are the two EQ. I tried to boost it out at the higher end, but it didn't do much so I'll just leave it alone.

Its interesting that the right needed so much, whereas the left didn't change much/need much. I thought the left would be troublesome as it is closest to the a wall/window, whereas the right sits in the middle of a large wall more or less

The settings for the R ch are scaring me. Both the number of filters and the extreme Q settings.

Save it for later, but I'd suggest building a new set, using the Synthesis strategy. Start with the lowest Q filter to address the broadest EQ correction. Something like 1.5 kHz, Q = 1 or 2. Tweak as necessary for smoothest curve. If you need some additional fine tuning, add another. Use no more than 3 filters, for the sake of this test.

Compare.

Quote:


The bass is very, very noticeable, that has worked a treat.

Do you have plots for the bass response?
Reply
Reply
post #147 of 193
3/10/12 at 2:54pm
Thread Starter 
2 filters - one as suggested at 1.5 kHz (-5db, Q1) and +1db around 3.5kHz

I'll keep fiddling with this when I have some more time



Here is the Sub plots:

Reply
Reply
post #148 of 193
3/10/12 at 6:13pm
Quote:
Originally Posted by Elill View Post

Here are the two EQ. I tried to boost it out at the higher end, but it didn't doo much so I'll just leave it alone.





Its interesting that the right needed so much, whereas the left didn't change much/need much. I thought the left would be troublesome as it is closest to the a wall/window, whereas the right sits in the middle of a large wall more or less



The bass is very, very noticeable, that has worked a treat. With the L and R the dialogue seems a little clearer/defined to me.

I suppose the cool thing about all this is when I heard the big brother to my speakers, I was completely in awe. These things:



They have a face only a mother could love.

Its nice to actually see the measurements confirm that they're a good speaker (off axis seems pretty ok) and it wasn't just some emotional attachment I had to them on hearing them for the first time.

All in all, I am really happy with them. I'll be using the same thing come time to kick start the theater again, now that I have a formula that I knows works

That looks like the design I am going to build in the future. Although I am going to try and curve my cabinets. (15's, 6.5 and Ribbon)
Reply
Reply
post #149 of 193
3/10/12 at 9:08pm
Thread Starter 
Quote:
Originally Posted by chrapladm View Post

6.5 and Ribbon)

That's no ribbon, its an AMT
Reply
Reply
post #150 of 193
3/13/12 at 12:07am
Yah I remember reading about that particular AMT also. It just reminded me of my design was all.
Reply
Reply
New Posts  All Forums:Forum Nav:
  Return Home

AVS Top Picks