Porksoda
500+ Head-Fier
- Joined
- Jan 7, 2004
- Posts
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Hey guys. I graduated, and got a good deal of $$ in presents
I've already bought an Audigy 2 ZS and some other small computer stuff I needed. Next order of business is an amp, mini-to-mini interconnect, mini-to-rca interconnect, and some SR-225s.
So, I have about $120 for amps and interconnects, but I already have some parts. I already have the ICs, and CAT-5 for the interconnects. I also have a lab where I go to school from which I might be able to salvage housings, transformers, and maybe some jacks.
The two amps I want to build is a home PPA and some sort of "largish" portable with two 9V NiMH in paralell. I figure since the portable will be driving SR-225s they won't need the 18V, and as long as I use a suitable op-amp it should be fine. For the PPA, I plan to use the Class-A discrete component buffer off of Headwise, seen here.
So, one of my big questions is what kind of coupling caps to use on the PPA? I can't afford anything top of the line, but seeing as grados are low impedence I don't want to risk DC offset killing them.
Also, if I have this smaller amp running on 9V, what is a good buffer to use? I was thinking about the Class AB buffer on headwise might be a good choice, seen here.
I'm using the Audigy2 and an imp-350 as sources, btw. (for now
)
Thanks for any suggestions you can offer!
So, I have about $120 for amps and interconnects, but I already have some parts. I already have the ICs, and CAT-5 for the interconnects. I also have a lab where I go to school from which I might be able to salvage housings, transformers, and maybe some jacks.
The two amps I want to build is a home PPA and some sort of "largish" portable with two 9V NiMH in paralell. I figure since the portable will be driving SR-225s they won't need the 18V, and as long as I use a suitable op-amp it should be fine. For the PPA, I plan to use the Class-A discrete component buffer off of Headwise, seen here.
So, one of my big questions is what kind of coupling caps to use on the PPA? I can't afford anything top of the line, but seeing as grados are low impedence I don't want to risk DC offset killing them.
Also, if I have this smaller amp running on 9V, what is a good buffer to use? I was thinking about the Class AB buffer on headwise might be a good choice, seen here.
I'm using the Audigy2 and an imp-350 as sources, btw. (for now
Thanks for any suggestions you can offer!