I recently bought a Mayflower O2 headphone amplifier which comes with a Triad WAU12-200 (12VAC 200mA) power adapter.
I contacted MayFlower and they said that the PSU(WAU12-200) is more than enough. I also contacted JDS Labs and they said that with WAU12-200, under heavy use, the amp causes distortion and the failure rate also increases. JDS Lab says the 15VAC power adapter they sell on their website is the best.
NwAvGuy himself says on his blog that WAU12-200 is adequate in 99% of cases but when using power hungry low impedance headphones (HifiMan Planars), the ideal power adapter would be rated at 14 - 16 VAC and 400 mA or higher. He recommends WAU16-400, 412-218054 or WAU16-1000 .. but again some people say that this is outdated information.
These are thee headphones I have(or will purchase in the future):
AKG K702/Q701
Senn HD58X
DT990 250ohm
Philips X2HR
AD900X
Grado SR225i
HE-400 (the very old one)
T50RPMKII
Deva Pro
Sundara
etc....
Should I stick to my WAU12-200, Should I get the 15VAC adapter from JDS Labs or should I get one the WAU16's ?
I contacted MayFlower and they said that the PSU(WAU12-200) is more than enough. I also contacted JDS Labs and they said that with WAU12-200, under heavy use, the amp causes distortion and the failure rate also increases. JDS Lab says the 15VAC power adapter they sell on their website is the best.
NwAvGuy himself says on his blog that WAU12-200 is adequate in 99% of cases but when using power hungry low impedance headphones (HifiMan Planars), the ideal power adapter would be rated at 14 - 16 VAC and 400 mA or higher. He recommends WAU16-400, 412-218054 or WAU16-1000 .. but again some people say that this is outdated information.
These are thee headphones I have(or will purchase in the future):
AKG K702/Q701
Senn HD58X
DT990 250ohm
Philips X2HR
AD900X
Grado SR225i
HE-400 (the very old one)
T50RPMKII
Deva Pro
Sundara
etc....
Should I stick to my WAU12-200, Should I get the 15VAC adapter from JDS Labs or should I get one the WAU16's ?
You broke it already??
Wait until you've gotten used to how it sounds with those difficult headphones (that you don't even have yet?), and then decide if you want more current than 200mA. Higher voltage will mostly just heat up the Vregs inside the O2, but you could try plugging your unregulated linear-type 12VAC wallwart into a variac and crank it to 140VAC, and it would make 14VAC 200mA. (140V/120V x 12V = 14V)
Wait until you've gotten used to how it sounds with those difficult headphones (that you don't even have yet?), and then decide if you want more current than 200mA. Higher voltage will mostly just heat up the Vregs inside the O2, but you could try plugging your unregulated linear-type 12VAC wallwart into a variac and crank it to 140VAC, and it would make 14VAC 200mA. (140V/120V x 12V = 14V)