DIYowa 2009 is in the books

[martyh]

Re: DIYowa 2009 is in the books

marty, boast away. you mention the bsc. is this reasonable considering they were 3meters or more from the back curtain at iowa? what conditions, room, placement ect, did you have when you ajusted the stuffing?

They went through about 4 weeks of auditioning in my home - both medium and small sized rooms - as well as their 10 Minutes of Fame in Iowa. In all three venues they were a little big bass-wise and muted in the mids, hence the tweaking. Got'em where I want them now. They happily reside in my bedroom for the duration (a smallish room with way too much overstuffed stuff).

As for the rest of the comedians on this thread...chuckle on boys!

[Pete Schumacher]

Re: DIYowa 2009 is in the books

Sit closer. ;)

Headphones? :D

[Dirk]

Re: DIYowa 2009 is in the books

I doubt you can get any 5" based system to get to paint peeling levels, especially one with, at best, a mid 80s sensitivity level.

Sit closer. ;)

[Paul K.]

Re: DIYowa 2009 is in the books

You've reduced the stuffing density 10% or so and that's fine. In a 3-way where the woofer doesn't cover much if any beyond the bass range and is the only driver loaded by the TL, there would not likely be a situation like this. But in a 2-way with the midwoofer in its TL covering bass and midrange, changing the stuffing density will definitely impact how the midrange sounds since the stuffing affects higher frequencies much more than lower frequencies. Nothing at all wrong with making adjustments like this to suit you and make the sound better.
Paul

Hi All,

For starts I want to thank all of the Iowa 2009 attendee's for their constructive criticism to my Copper Project. Much has been made of the Tang Band W5-1685's performance in that project - it did turn a few heads! Combined with the Vifa XT25SC90, they make a pretty nice team.

A couple of you mentioned that the midrange seemed a little laid back and I agree with that. Dirk mentioned that we may have engineered a little too much BSC - no argument, but how to deal with that? Two ways, and it only made sense to pursue the less aggressive route first. Now it might have been logical to head back to the PCD and rework the low pass filter, but it seemed easier to modify the box stuffing and hear what we would hear. One aspirin vs the whole bottle, as it were.

I removed about 1 oz. total of AcoustaStuff equally from either side of the interior divider and they ended up being just a little shouty (well maybe more than a little). So I rebalanced the stuffing along both sides of the internal baffle, added back about half of what I removed and got exactly what I wanted. Maybe I had the balance wrong in the first place...don't really know. (Sidebar: Paul, we have about 7.5 oz per cabinet, now).

The Coppers are now smoother across the lower frequencies (<150 hz) which also helped opened up the midrange, so now David Crosby and Donald Fagen don't sound like they're enduring their 48-year colds anymore! Heck, even Amy Winehouse sounds a little less strung out.

Anyway, I just wanted you all to know that the modification is complete and so is the project. Not being boastful, but it's about the best $220 you'll spend on a project. Thanks for the input guys!

[Pete Schumacher]

Re: DIYowa 2009 is in the books

I like the fact that they're totally non-fatiguing. I'm pretty sure you could listen to them at paint-peeling levels for hours without getting tired of them.

I doubt you can get any 5" based system to get to paint peeling levels, especially one with, at best, a mid 80s sensitivity level.

Add a sub and high pass the system at 80Hz and you might move toward that goal . . .

;)

[Dirk]

Re: DIYowa 2009 is in the books

Anyway, I just wanted you all to know that the modification is complete and so is the project. Not being boastful, but it's about the best $220 you'll spend on a project. Thanks for the input guys!

I like the fact that they're totally non-fatiguing. I'm pretty sure you could listen to them at paint-peeling levels for hours without getting tired of them.

[[email protected]]

Re: DIYowa 2009 is in the books

marty, boast away. you mention the bsc. is this reasonable considering they were 3meters or more from the back curtain at iowa? what conditions, room, placement ect, did you have when you ajusted the stuffing?

[gowa]

Re: DIYowa 2009 is in the books

Nice pictures of the work this year. Just an amazing collection of designs all around.

[martyh]

Re: DIYowa 2009 is in the books

Hi All,

For starts I want to thank all of the Iowa 2009 attendee's for their constructive criticism to my Copper Project. Much has been made of the Tang Band W5-1685's performance in that project - it did turn a few heads! Combined with the Vifa XT25SC90, they make a pretty nice team.

A couple of you mentioned that the midrange seemed a little laid back and I agree with that. Dirk mentioned that we may have engineered a little too much BSC - no argument, but how to deal with that? Two ways, and it only made sense to pursue the less aggressive route first. Now it might have been logical to head back to the PCD and rework the low pass filter, but it seemed easier to modify the box stuffing and hear what we would hear. One aspirin vs the whole bottle, as it were.

I removed about 1 oz. total of AcoustaStuff equally from either side of the interior divider and they ended up being just a little shouty (well maybe more than a little). So I rebalanced the stuffing along both sides of the internal baffle, added back about half of what I removed and got exactly what I wanted. Maybe I had the balance wrong in the first place...don't really know. (Sidebar: Paul, we have about 7.5 oz per cabinet, now).

The Coppers are now smoother across the lower frequencies (<150 hz) which also helped opened up the midrange, so now David Crosby and Donald Fagen don't sound like they're enduring their 48-year colds anymore! Heck, even Amy Winehouse sounds a little less strung out.

Anyway, I just wanted you all to know that the modification is complete and so is the project. Not being boastful, but it's about the best $220 you'll spend on a project. Thanks for the input guys!

[shawn_a]

Re: DIYowa 2009 is in the books

Hey everyone, Scott's "little" brother here. I wanted to stop by and thank everyone that worked to put on the event, it was a great time and a great chance to get to hear others hard work. I've had a chance to install soundeasy and play with it a little bit and I definitely have ALOT of reading and experimenting to do.

I finally got around to doing all the post processing and got all the photos i took posted onto the web. So if anyone is interested in some more pics of the same speakers feel free to have a look.

http://picasaweb.google.com/JonSehlin/IowaDIY2009#

Jon

Still owe ya a slap in the face with a pizza box :D. It was great meeting ya though, Jon. Glad you made the trip and I hope to see everyone again next year.

shawn

[Wolf]

Re: DIYowa 2009 is in the books

Hey everyone, Scott's "little" brother here. I wanted to stop by and thank everyone that worked to put on the event, it was a great time and a great chance to get to hear others hard work. I've had a chance to install soundeasy and play with it a little bit and I definitely have ALOT of reading and experimenting to do.

I finally got around to doing all the post processing and got all the photos i took posted onto the web. So if anyone is interested in some more pics of the same speakers feel free to have a look.

http://picasaweb.google.com/JonSehlin/IowaDIY2009#

Jon

It was nice chatting with you and your little... I mean 'older' brother. :D
Hope to see you 2 again,
Wolf

[JonS]

Re: DIYowa 2009 is in the books

Hey everyone, Scott's "little" brother here. I wanted to stop by and thank everyone that worked to put on the event, it was a great time and a great chance to get to hear others hard work. I've had a chance to install soundeasy and play with it a little bit and I definitely have ALOT of reading and experimenting to do.

I finally got around to doing all the post processing and got all the photos i took posted onto the web. So if anyone is interested in some more pics of the same speakers feel free to have a look.

http://picasaweb.google.com/JonSehlin/IowaDIY2009#

Jon

[DougP]

Re: DIYowa 2009 is in the books

Sign me up.

This is my first post here. I've been hanging out at the old "Bass List" for a long time but it's pretty quiet over there after a couple of moves. I'm the old guy with the cherry veneered MTMs that we didn't get around to listening to. I'll try to have more courage next year.

It was a great event. I was impressed by the quality of sound and amazed at what some of the smaller systems could do. I got to hear several systems using the BG Neo3 tweeter which I'd already purchased for a surround system but haven't got together yet. I really liked the Matrix system. I got to hear a nice selection of new music and have ordered a couple of CDs.

I have a couple of questions. What SPL at what distance were the systems set to with the noise track? Are active systems welcome?

Finally, thanks Doug and all the others that helped put this together.

Ron E

Ron,

If you are using the Iowa test CD the Pink noise was measured at 100db on the tweeter axis at about 6 inches. As a general run active systems take to long to set up for the event. However if they can be set up during a break or lunch then we can try and run them. It just depends.
Doug

[Ron_E]

Re: DIYowa 2009 is in the books

No sign up sheet yet but you can mark your calendar for October 16th. I reserved the room yesterday.
Doug

Sign me up.

This is my first post here. I've been hanging out at the old "Bass List" for a long time but it's pretty quiet over there after a couple of moves. I'm the old guy with the cherry veneered MTMs that we didn't get around to listening to. I'll try to have more courage next year.

It was a great event. I was impressed by the quality of sound and amazed at what some of the smaller systems could do. I got to hear several systems using the BG Neo3 tweeter which I'd already purchased for a surround system but haven't got together yet. I really liked the Matrix system. I got to hear a nice selection of new music and have ordered a couple of CDs.

I have a couple of questions. What SPL at what distance were the systems set to with the noise track? Are active systems welcome?

Finally, thanks Doug and all the others that helped put this together.

Ron E

[maynardg]

Re: DIYowa 2009 is in the books

For your next project Maynard, how about just adding a bass module for the Tzu Juans (hope I spelled that right). Seems like the only thing they're missing at all is the extended low end. And if you remove those duties from the AC woofer, it would probably open up even more.

you are a mind reader ..... sort of a Tzu-Jan-Ziran. I have the top module built. Any thoughts on the XO?