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07-14-2009, 10:32 PM
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Headphoneus Supremus
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Join Date: Sep 2007
Location: Peaceful village in Ohio.
Posts: 4,984
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Those betas are freakin' amazing!
I love your front panel design, simple but elegant.
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07-14-2009, 10:38 PM
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Headphoneus Supremus
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Join Date: Mar 2006
Location: San Francisco, CA
Posts: 6,644
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Looks nice, congrats. Now what about shots of the B24 
__________________
Home: ESI Juli@ (I2S) -> Buffalo32 -> Balanced Dynalo / Melos Maestro / SinglePower MPX3
Headphones: HP-2, RS-1, SR-200, Sennheiser HD-600, HD-650, Denon D-5000, AKG K271
Portable: 240GB diyMod 5.5G -> V-Cap Dock -> PPAS -> UE700
Office: Gamma1 -> PPAS -> K271
Feedback
Digital Audio Primer
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07-15-2009, 04:36 PM
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Head-Fi'er
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Join Date: Apr 2009
Posts: 30
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Here is my latest "re-house a Class D" cheap amp project.
I've posted an in-depth article with loads of pictures and ideas so if you are looking to put something fun into an enclosure, give it a look:
Let's Build a Class D Amplifier!
Happy Wednesday!
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07-15-2009, 04:46 PM
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Headphoneus Supremus
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Join Date: May 2006
Location: NC
Posts: 2,139
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that is insane, 2 b24s?
__________________
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₪ Bedside > Rockboxed IPOD 5G / ESW10 japan
"Music is the shorthand of emotion." ~ Tolstoy
"Music is a beautiful opiate, if you don't take it too seriously." ~ Henry Miller
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THE Ultimate Headphone Review - Learn How to Truly Hear Your Headphones
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07-15-2009, 04:50 PM
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Headphoneus Supremus
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Join Date: Oct 2008
Location: mtn view, ca
Posts: 2,648
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nice write-up, dano.
I also have one of those class-D amps. I should case mine up, too. mine was $15
__________________
Phones: hd-580, DIY hd-650
Amps: motorized remote pimeta, PPAv1 (rackmount), PPAv1 in Hammond, minimax, Beta22, Sigma22, pimeta-v2,
DACs: BantamDAC,gamma1,gamma1-spdif, DACmaster/gamma2,SPDIFmaster spdif coax/opto switch
Photostream:http://www.flickr.com/photos/linux-works/
Website:http://www.netstuff.org/audio/
"Everybody's tied up in a solid state; Nobody's without twin reverb." -george harrison
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07-15-2009, 05:34 PM
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Member of the Trade:
AMB Laboratories
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Join Date: Apr 2004
Location: Sunnyvale, CA. USA
Posts: 4,014
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Quote:
Originally Posted by DoYouRight
that is insane, 2 b24s?
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qkizz's β24s are monoblocks -- a separate chassis for each channel.
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07-15-2009, 07:09 PM
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100+ Head-Fi'er
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Join Date: Sep 2005
Posts: 441
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qkizz, I like what you have done with the front panel. By using a smaller bit of metal for the odd shaped bits and logo it keeps the costs down and saves doing the whole front part.
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07-15-2009, 07:40 PM
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Headphoneus Supremus
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Join Date: Oct 2008
Location: mtn view, ca
Posts: 2,648
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Quote:
Originally Posted by danobeavis
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is that power connector a 1/8" audio jack??
tell me it isn't.
__________________
Phones: hd-580, DIY hd-650
Amps: motorized remote pimeta, PPAv1 (rackmount), PPAv1 in Hammond, minimax, Beta22, Sigma22, pimeta-v2,
DACs: BantamDAC,gamma1,gamma1-spdif, DACmaster/gamma2,SPDIFmaster spdif coax/opto switch
Photostream:http://www.flickr.com/photos/linux-works/
Website:http://www.netstuff.org/audio/
"Everybody's tied up in a solid state; Nobody's without twin reverb." -george harrison
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07-15-2009, 07:47 PM
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Head-Fi'er
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Join Date: Apr 2009
Posts: 30
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Quote:
Originally Posted by linuxworks
is that power connector a 1/8" audio jack??
tell me it isn't.
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Yep, but it is there because I didn't have enough room to do my standard kobiconn insulated part.
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07-15-2009, 07:50 PM
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Headphoneus Supremus
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Join Date: Oct 2008
Location: mtn view, ca
Posts: 2,648
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you do realize that if it comes out while the power is on, its *shorting* right?
audio alchemy designed gear like that. not a good idea, especially on production gear.
I would really suggest getting a non-shorting barrel style connector.
__________________
Phones: hd-580, DIY hd-650
Amps: motorized remote pimeta, PPAv1 (rackmount), PPAv1 in Hammond, minimax, Beta22, Sigma22, pimeta-v2,
DACs: BantamDAC,gamma1,gamma1-spdif, DACmaster/gamma2,SPDIFmaster spdif coax/opto switch
Photostream:http://www.flickr.com/photos/linux-works/
Website:http://www.netstuff.org/audio/
"Everybody's tied up in a solid state; Nobody's without twin reverb." -george harrison
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07-16-2009, 12:40 AM
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Head-Fi'er
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Join Date: Apr 2009
Posts: 30
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Quote:
Originally Posted by linuxworks
you do realize that if it comes out while the power is on, its *shorting* right?
audio alchemy designed gear like that. not a good idea, especially on production gear.
I would really suggest getting a non-shorting barrel style connector.
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Yep, as mentioned I nomrally use plastic kobiconns. On this particular build, I underestimated the part size when I drilled the back panel. Rather than scrap the enclosure, I decided to forge ahead with the parts available. I actually pull the wallwart out of the socket before switching of before unplugging. As for production gear, I've built 20-40 unit runs of guitar effects before, so I wouldn't take that shortcut on a production unit.
BTW, I've dug out my arduino and some relays, going to work pushbutton source switcher. Your pics have had me itching to go back to MCU stuff for a while... 
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07-17-2009, 03:34 PM
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Junior Head-Fi'er
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Join Date: Jul 2009
Location: Cincinnati, OH
Posts: 19
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Hello everyone,
I just wanted to say that seeing all these pictures and reading about everyone's projects is incredibly motivating. I'm pretty much just starting to get into these kind of things and it is awesome that so many people are this talented at it. Hopefully before too long I'll have something of my own to share.
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07-17-2009, 03:39 PM
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Head-Fi'er
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Join Date: Dec 2008
Posts: 45
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i'd suggest u start with a cMoy amplifier. you can get all infos u need here: Tangentsoft Lookin' forward to see ur first project.
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07-18-2009, 07:49 PM
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Headphoneus Supremus
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Join Date: Oct 2008
Location: mtn view, ca
Posts: 2,648
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2 'mad scientist' (bwahahaha!) pics showing a test bed, quite unfinished, but slowly getting there:
trying out a slightly different take on the old relay attenuator thing. and trying to keep the software so that it works for both the PGA style volume control chips as well as relay methods. I'm trying out 7bit relays here, so that goes from -127db to 0. the PGA chip 'only' goes from -95db but also gives gain and goes to +31db, if called upon.
this was a lot of soldering, these 2 boards. I would not recommend this (lol). but it also gave me some insights on trace layout, so it was not a total waste. sometimes you can really appreciate some geometry or layout when you've had to manually solder things over and over again 
like this:
lol!
again, not recommended. it was very frustrating trying to solder this.
__________________
Phones: hd-580, DIY hd-650
Amps: motorized remote pimeta, PPAv1 (rackmount), PPAv1 in Hammond, minimax, Beta22, Sigma22, pimeta-v2,
DACs: BantamDAC,gamma1,gamma1-spdif, DACmaster/gamma2,SPDIFmaster spdif coax/opto switch
Photostream:http://www.flickr.com/photos/linux-works/
Website:http://www.netstuff.org/audio/
"Everybody's tied up in a solid state; Nobody's without twin reverb." -george harrison
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07-18-2009, 10:45 PM
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Headphoneus Supremus
Moderator
Resistorous Conflagorous
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Join Date: Nov 2004
Location: Seacoast, NH
Posts: 7,312
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Very cool stuff, linuxworks!
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