Mark Audio CHR-70 Application Thread - Page 14 - diyAudio
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Old 24th April 2009, 04:53 PM   #131
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Version 2.0 with the modification that Dave suggested. With the top ballast removed they become a lot less top heavy and I don't know if they will even need a base. I've got some sanding to do today and I'll test their stability later as well.

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Old 24th April 2009, 05:18 PM   #132
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Your making me jealous Italianstylion, with my current project load of 4 LM3875 monoblocks and 2 F5 amps I'm likely to get these cabinets started in I don't know, never LOL.

I think I'll omit the second driver in mine at first to see what we get, then if I feel I need better power handling I'll add the second. I have visions of building my mother a pair of these as a gift, so the extra two drivers could come in handy yah dig....

They are kinda cute don't you think? LOL...

Good job ItalianStylion I look forward to your review after a full breaking in... Peace and keep well.
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Old 24th April 2009, 05:22 PM   #133
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Even with sand or other heavy ballast material in the lower cavity, these will still be very tippy - I'd suggest a base plate at least 10" wide.

If you can find a local countertop shop that works with granite or synthetic quartz, it shouldn't be too hard to talk them out of a sink cut-out (amazing what a case of brew can get you on a sunny Friday afternoon)
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Old 24th April 2009, 06:04 PM   #134
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Quote:
Originally posted by chrisb


If you can find a local countertop shop that works with granite or synthetic quartz, it shouldn't be too hard to talk them out of a sink cut-out (amazing what a case of brew can get you on a sunny Friday afternoon)

What a fantastic idea! I'll see what i can find locally. Immediately I'm having trouble coming up with ideas about how to attach that to the bottom of the cabinet but I'm sure I could come up with something.
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Old 24th April 2009, 10:00 PM   #135
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Quote:
Originally posted by chrisb
Even with sand or other heavy ballast material in the lower cavity, these will still be very tippy - I'd suggest a base plate at least 10" wide.
If you have a cat around this is especially true. It's amazing how much tipping force they can generate when they launch themselves from the top of a speaker, or stretch up and lean on one. I had to patch a 1/4" deep dent when my (tiny) cat jumped off a Bose cabinet and launched it into the wall.

Cheers
John
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Old 24th April 2009, 10:16 PM   #136
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^^Just one of the many reasons why cat's are not good pets.
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Old 24th April 2009, 10:56 PM   #137
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Quote:
Originally posted by italynstylion
^^Just one of the many reasons why cat's are not good pets.
Careful when you come up for a VI diyFEST. One of our 10 cats may lunch on you.

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Old 25th April 2009, 05:40 AM   #138
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Originally posted by planet10


Careful when you come up for a VI diyFEST. One of our 10 cats may lunch on you.

dave

Lunch or launch? One is scary and the other.....terrifying
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Old 26th April 2009, 06:19 PM   #139
chrisb is offline chrisb  Canada
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Quote:
Originally posted by italynstylion



What a fantastic idea! I'll see what i can find locally. Immediately I'm having trouble coming up with ideas about how to attach that to the bottom of the cabinet but I'm sure I could come up with something.

Funny- Dave, Scott Dunn & I were discussing this just yesterday afternoon. It might take a 2-4 (aka 2 dozen box), but the same shop should be able to drill a few through holes, and you'd attach to the enclosure with either a KD furniture assembly bolt, or even truss head wood screws. Don't worry about counterboring in the stone - PSA felt or rubber feet will raise the base plate higher than the head of the screws.

Now, if you wanted to get carried away and install spikes of some type, then things get a bit more interesting. In which case Corian or similar solid surface material ( also likely to be available from many countertop shops) can re relatively easily worked with using carbide woodwork tooling, and for non-structural work, can be glued with either white PVA or standard epoxy resins, as opposed to the proprietary adhesives that require special mixing/application guns. A few years ago, I made some Corian platters for my Rega turntable - all the machining was with hand rounters and a simple circle jig.


And depending on which gets to your lap first, Dave & Ruth's cats might well launch and lunch on you. They're a bit schizophrenic - can't decide if they're feral or domesticated (the cats that is)
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Old 26th April 2009, 06:23 PM   #140
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ROFL at the cats comment....


How heavy is corian? Do you think that would work well? I have a friend on another forum that might be able to get some. He recently posted a thread about it. I might have to hit him up.
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