Wayne's headphone amp build
- MikoKensington
- Posts: 12
- Joined: Fri Mar 28, 2008 12:10 pm
- Location: Detroit
Re: Wayne's headphone amp build
What kind of phones are you trying to crank?
- MikoKensington
- Posts: 12
- Joined: Fri Mar 28, 2008 12:10 pm
- Location: Detroit
Re: Wayne's headphone amp build
Those 7506's are really efficient headphones. It doesn't take much to make those hurt the ears. My requirement for a headphone amp is that it must be able to drive a set of AKG 240M's loud enough to hear a mix while playing drums with earplugs in. (then cross fingers the click doesn't bleed )
Re: Wayne's headphone amp build
Looks nice! Has a similar vibe to the small DBX units!
- mediatechnology
- Posts: 5463
- Joined: Sat Aug 11, 2007 2:34 pm
- Location: Oak Cliff, Texas
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Re: Wayne's headphone amp build
Nice build! I had my Dad make me a pair of walnut wooden end-caps for dBx extrusion like that years ago and I should use them. I had a 3BX that came to me rack-mount I wanted to convert.
The 7506's are ear splitting at just a volt or two with a 63 Ohm 106dB/mW sensitivity.
I think you have a vintage pair of K240s. IIRC they're now around 50 Ohms. For those, you might turn the 1246 gain resistors around backwards to give you +6dB gain rather than -6 dB. The original K240s always did require a lot of drive voltage.I also use AKG K240Ms and I am certain I need more gain for those being higher impedance, 600Ohms.
The 7506's are ear splitting at just a volt or two with a 63 Ohm 106dB/mW sensitivity.
- mediatechnology
- Posts: 5463
- Joined: Sat Aug 11, 2007 2:34 pm
- Location: Oak Cliff, Texas
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Re: Wayne's headphone amp build
It should be unity gain. I haven't had any lack of adequate drive with cosnumer level "-10" stuff.
You might try the +9 dB trick here: viewtopic.php?f=6&t=23&start=100
You might try the +9 dB trick here: viewtopic.php?f=6&t=23&start=100