SDS Labs Headphone Amp Design... Ideas? ...opt. for 300 Ohm phones?...or something else??

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I have been tweaking my components for some time and would like to try my hands at building my own component. A headphone amp looks like a good place to start for the simplicity of the circut, low cost and the fact that I don't have a quality headphone amp to power my 580s. I have seen several designs on the headwize site and ran across this design on the SDS labs page. www.Clarkson.edu/~stokessd)Is this a good design? It is basicly an op-amp (OPA2132)driving a pair of MOSFETs (Harris RFP15N/P05) two per channel. I like the fact that there are no caps in the signal path, and I plan wire connections point to point and not use a circut board. I am a little concerned because this was designed to drive some Grado 60s which are 32ohms. Will this circut have a problem with my Senns at 300 Ohms? I was planning on upgrading several of the parts on the recomended list. eg, replace ceramics with PP, resistors to Vishay, Some good quality electrolytic caps, use LM6172 or 2 OPA627s as I have a few of both laying around, Bypass everything with SMD stacked film etc. Are there any other suggestions for improving on this circut, perhaps 2 seperate PS and circuts for the L and R channels? Any information and or words of wisdom will be greatly appreciated

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The Cable Cooker

Topic - SDS Labs Headphone Amp Design... Ideas? ...opt. for 300 Ohm phones?...or something else?? - ViolinBF 04:06:08 02/07/01 (5)

Re: SDS Labs Headphone Amp Design... Ideas? ...opt. for 300 Ohm phones?...or something else?? - Eli Duttman 17:22:05 02/07/01 (4)

Contacting Dr. Stokes - tenor39 18:56:27 02/07/01 (3)

Re: Contacting Dr. Stokes - Eli Duttman 16:46:29 02/09/01 (2)

Dr. Stokes' New EMail Address is .... - Eli Duttman 16:13:47 02/12/01 (0)

Dr. Stokes' New EMail Address is .... - Eli Duttman 16:11:21 02/12/01 (0)

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