Mark Audio CHR-70 Application Thread - Page 21 - diyAudio
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Old 3rd July 2009, 11:30 AM   #201
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Quote:
Originally posted by HareBrained
Even listening to a KEXP podcast of Steve Earle, which only 192kbps, sounded fantastic.
In my experience, the soundcard (and driver) has an incredibly large amount to do with lossy format sound quality.

My Yamaha DS-XG50 makes .mp3 sound bad with the Windows drivers, but oh soooo sweeeet with the Linux ALSA drivers

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Old 3rd July 2009, 03:17 PM   #202
gychang is offline gychang  United States
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Quote:
Originally posted by chrisb



me thinks there will soon be almost too many from which to choose - I know we've got a few underway or on the drawing board

waiting for a "guest room" (not BIB size but smaller foot print) floor standing, stylish model with adequate bass. Can't wait.

gychang
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Old 4th July 2009, 12:46 AM   #203
vaughn is offline vaughn  United States
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well I know this is probably heresy but...

I just ordered two pairs of these and plan on using them in a cabinet with
a separate woofer. I don't know which woofer but I have had great experience with
the JBL LE14a. I don't know, maybe one of Dayton's aluminum cone RS series subs.

Anyway, I would like to use these open baffle for the top end. I am wondering if I am going to need two drivers if I am not asking it to do anything below 150hz? If I am going to need two drivers can I mount them at right angles like the previously mentioned designs, but on an open baffle? Would this create any problems?

Optionally I could use them in a bipole configuration?
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Old 7th July 2009, 06:09 AM   #204
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Quote:

In my experience, the soundcard (and driver) has an incredibly large amount to do with lossy format sound quality.

My Yamaha DS-XG50 makes .mp3 sound bad with the Windows drivers, but oh soooo sweeeet with the Linux ALSA drivers
just wondering if this was specific (more evident) to the chr70 or is it for all your speakers? I'm pretty curious about the difference between different sound cards. From what I've experienced most inbuilt ac97 and intel hd audio cards are pretty similar with alsa and windows drivers
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Old 7th July 2009, 08:17 AM   #205
chrisb is offline chrisb  Canada
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Quote:
Originally posted by gychang



waiting for a "guest room" (not BIB size but smaller foot print) floor standing, stylish model with adequate bass. Can't wait.

gychang

"adequate" is a bit of a nebulous target to aim for, but if the guest room you're talking about is less than 300 sq ft, and SPL levels needn't be excessive, I'd imagine there are any number of enclosures that might fit the design brief.

Indeed, I'm a couple of days away from buttoning up a couple of variants on a new compact floorstanding enclosures for the CHR70 (an other similar drivers) from the DaveD/Planet10 idea engine. We try to actually build an listen to at least one design from each new genus before getting to excited about publishing drawings, so the one hint for now is - bipole.

and, oh yes - "many things old are new again" (along with, when we're lucky, perhaps a new perspective of, or lexicon for describing how they work)
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Old 7th July 2009, 08:32 AM   #206
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And here is a teaser for one that probably isn't diminuative enuff for Mr Chang's need

Muhahaaha

Click the image to open in full size.

Meant to load into a wall or corner. Suitable for CHR-70, FE126e, and a 3rd (not yet released) driver. This is actually a spin-out from working on Frugel-Horn Mk II

dave
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Old 7th July 2009, 01:50 PM   #207
gychang is offline gychang  United States
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Quote:
Originally posted by planet10
And here is a teaser for one that probably isn't diminuative enuff for Mr Chang's need

Muhahaaha

Click the image to open in full size.

Meant to load into a wall or corner. Suitable for CHR-70, FE126e, and a 3rd (not yet released) driver. This is actually a spin-out from working on Frugel-Horn Mk II

dave
Oh, my... this is great.

any chance on the dimensions?

gychang
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Old 7th July 2009, 04:10 PM   #208
chrisb is offline chrisb  Canada
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Quote:
Originally posted by gychang


Oh, my... this is great.

any chance on the dimensions?

gychang

approx 60" tall, 14" deep, 7.5" wide

there is a more diminutive design is approx 1/4 that cubic volume - blame me for asking Dave to hold back drawings until we actually get some finished -
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Old 7th July 2009, 07:59 PM   #209
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Ok, I know this is a CHR-70 thread, but what kind of low end response would we expect to see out of the FE-126 in that thing? I'm guessing a bit lower than the Frugal since it's appox twice the size.
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Old 23rd July 2009, 08:56 AM   #210
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Question 2 HareBrained: Please Help

Quote:
Originally posted by HareBrained
....
The driver opening is visible through the far chamber. Half-inch material was used throughout. Because of some errors on my part, I had to use MDF for the port walls. All ports have the same effective length (slot port effective length is longer than actual length by half the height due to end being next to wall.) The height of the ports is 3/4". I used a couple of scraps of wood to set the spacing. The center port does wrap on both ends, again minimizing the walls. The driver chamber is twice the volume of the other. Besides the obvious stuffing, I glued some foam behind the driver, and I'm thinking of adding a little acousta-stuff in the driver chamber.
....
- John [/B]
Hi John,
I had no experience in speakers design; just trying to reproduce your design. Could you please review my dimensions?
  • Iím not sure that ports are right size.
  • Speaker is centered by tom chamber, so it slightly closer to one of the sides. Can I place speaker (vertically) in the middle of front baffle?
  • What the right place of the center port? Numbers on picture (9 5/64 and 10 27/64) are wrong. What are right ones?

If you want I can send you my Google sketch up file.
Thank you,
Vlad
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