Grinnell or Bust

[Ron_E]

Re: Grinnell or Bust

Pitbull shows out of stock as well. Is this the correct link to the software http://www.bodziosoftware.com.au/ ?

That's the link. He gave me some Australian links but they're 50% higher than Pitbull.

http://www.velvetsystems.com/M.Audio.DELTA.1010LT.cfm

You might try E-bay.

Ron

[dcgold2000]

Re: Grinnell or Bust

Pitbull shows out of stock as well. Is this the correct link to the software http://www.bodziosoftware.com.au/ ?

[Ron_E]

Re: Grinnell or Bust

Hi Ron,

I was at DIY and thought your speakers were phenominal. A quick check on Google shows the 1010lt sound card as unavailable. Is there an alternate that you know of?

I got mine from Pitbull Audio. I thought they were unavailable too but Bohdan, the software author, sent me some links to vendors. http://www.pitbullaudio.com/m-audio-...al-studio.html

Ron

[dcgold2000]

Re: Grinnell or Bust

Hi Ron,

I was at DIY and thought your speakers were phenominal. A quick check on Google shows the 1010lt sound card as unavailable. Is there an alternate that you know of?

[Mark65]

Re: Grinnell or Bust

Whatever you call them, I call them AWESOME! I was absolutely floored by the sound coming out of those speakers. Great low end without being anything like boomy, crystal clear mids, and glassy, natural highs. Also, the build quality was absolutely STUNNING.

I won't feed the tag troll, but the tweeter was everything it's advertised to be, IMHO.


My hat is off to you, Sir!


Mark

[Ron_E]

Re: Grinnell or Bust

I managed to push the submit button before I finished my last post.

I'd like to thank everyone for all the interest in this project and all the appreciation shown for how it's turned out so far. It's been very gratifying.

If you're ever in central Iowa you're welcome to have a longer listen.

Ron

[Ron_E]

Re: Grinnell or Bust

I thought I'd document the system I used to demo the speakers at DIY Iowa 2013 yesterday.

The computer was a system I built 4 years ago with an AMD Phenom II X4 940 Black Edition CPU, Asus M3A78-EM Motherboard, and 4GB of memory running Windows 7 with Bodzio Software's Ultimate Equalizer. The multichannel sound card was the M-Audio Delta 1010LT. There were a pair of 22 watt/channel Onkyo CR-325 compact system receivers driving the BG Neo8-S and Raal 10-70D drivers with a Crown DSi 1000 driving the Vifa NE225W-08 woofers. The source used was a Denon DVD 1920. Everything was running in analog mode. The sound card supports digital inputs but I didn't have time to set it up that way. The interconnects and speaker cable came from Lowes.

The UE was configured for crossover points at 400 and 4000 at 48db/oct LR. The woofers were high passed at 40 Hz at 18 db/oct. The F3 of the woofer was 50 Hz in the enclosure so setting the 40 Hz high pass in UE boosted the low end down to 40 and rolled it off at 18 db/oct.



This is a graph of the expected system response for each band.



I didn't have time to take real measurements of the system before I left for Grinnell but I did a rough check with some RTA software I have and when the drive levels were set relative to each other the response looked very flat up high and one speaker had a prominent null at the mid tweeter crossover point. Reversing the tweeter phase on that speaker flattened it right out. (Someone must have wired that one wrong.) Using the RTA the low end was very uneven which I attribute to room effects.

I'm thinking about calling these the cherry π's. That's supposed to be the symbol for Pi.

Someone asked if they were influenced by an early design by Infinity. They weren't. I actually took my design queues from early art deco radios.



Ron

[Ron_E]

Re: Grinnell or Bust

I never had any doubt that you would finish.

Last night UE was whipping my but. It kind of fell together today. There is still some strangeness going on. The input signal is supposed to be coming in on inputs 1 & 2 but are showing up on 1 & 3 instead. I'm pretty sure they were right when I started but something changed. It will work but it's not quite right. Some settings will make the system have lots of digital hash. That's probably because I'm not doing something right.

This started Wednesday in front of our house and we're locked in from 8 to 6 every day. I'm not anywhere near ready to load tonight so I'll have to wait until they open up the street tomorrow afternoon before I can head to Grinnell.



Ron

[[email protected]]

Re: Grinnell or Bust

I never had any doubt that you would finish.

[bkeane1259]

Re: Grinnell or Bust

Jeeze Louise....those squiggles are mightly flat!!

[mzisserson]

Re: Grinnell or Bust

I got the tweeter rebate done, the holes drilled and the final assembly done for one speaker. Decided to design a little 6 db passive crossover to put in front of the tweeter for a little extra protection.

Tweeter Rebate
[ATTACH=CONFIG]40937[/ATTACH]

Finally
[ATTACH=CONFIG]40938[/ATTACH]

Ron

I really am just a lazy hack.....Some day I will take as much time in the cabinet work as I do in design....Those are Stunning Ron.

[Ron_E]

Re: Grinnell or Bust

I just had my first listen of one channel running with some 10 and 20 watt per channel amps and I think this might be pretty good. Back to work....

Ron

[Ron_E]

Re: Grinnell or Bust

I'm starting to make some progress with UE and have the measurement system up and running after battling the Delta sound card configurations. The mic cal file is doing some strange things to my eye way up high but I think the measurements look good where they need to.

BG Neo8-S


Raal 70-10D


Vifa NE225W-8 Nearfield


Thanks for the compliments guys. Still a lot to do but I just might pull this off yet. Didn't sleep well last night (greasy pizza and a late night beer) so I got up at 2 AM and made my demo disk.

Ron

[fdieck]

Re: Grinnell or Bust

Those are beautiful! You have created the world's finest DIY version of......

[Silver1omo]

Re: Grinnell or Bust

Awesome work! They look great.