[wuf]

hi there...
i just bought my first headphone today a sansui model SS-2.. it was cheap

http://www.classicsansui.net/Miscellaneous.htm there is specs
for it
i dont have a headamp so i want to build one that fits to the headphone..
i want something that is easy to build, dont cost to much max 200$ i guess..
what can you recomend??

 

[FallenAngel]

Wow, at only 8 Ohms and a maximum power input of 500mW, there's even a warning about using an amp that could output more power. This one is definitly to be answered by the pros.

 

[wuf]

thanks... sound like its not going to be easy

 

[ATAT]

Nice 'phones.. where'd you land em

Okay, I'll bite

we'll use teh calculator here

http://www.headphone-amplifier.com/c...r.htm?products

I'll assume a 100dB / mW sensitivity (since its not listed) and its reasonable

a 4.5 volt swing will get you to the threshold of pain for frequencies up to 10k

now that means we reverse derive the current output .. which would be around 100mA maximum since 4.5 volts at 100mA -> around 500mW.

Meh the specs point to something like a M^3 or szerkers (high output current) I think.. 4.5 swing isnt much so you can reduce the gain on the build..

Any other opinions?

 

[wuf]

thanks... i found them at the local junkyard costed me 2$

links to the 2 amps you mention

 

[00940]

Atat : please check your maths. A 100mA current in a 8ohms load translates into a power of 80mW. You need 250mA to get 500mW.

 

[ATAT]

*hand on mouth*

gosh damn that's right.. silly me messed up math..

but still that only makes the point more valid .. high current amps..

Szerkers is on headwize http://headwize.com/projects/showfil...szeke1_prj.htm

M^3 is on amb labs (site seems to be down..)

 

[wuf]

the MMM looks very nice.. i think i will try to build it later...
but about reducing the gain i dont now how...