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Originally Posted by boggle  Hi there maniac, your product sounds interesting. Here in Melbourne where I live there is a bunch of tweakers called Burson Audio who make discrete op amps: http://www.bursonaudio.com/Burson_HDAM_Module.htm
How do you think these would go in the output stage of your SPDIF dac? Maybe we could set up some sort of test - it adds a bit to the price but it looks to my inexperienced eye like the case for your unit might be able to accomodate them.
Incidently, what is the output impedence of your dac? |
Burson's product have been interested me for a while, but I never had the chance to try them. I'd love to hear people's comment on how it compares to the current crop of OP amps.
One issue that always concerns me with discrete parts is the device matching. IC OP amps don't need that because they could get naturally matched devices by careful design and being all on the same die. which is why National Semi's been announcing a bunch of insanely high performance OP Amps.
With that said, I am not trying to say that Burson's stuff is good or bad, but just something to keep in mind when considering discrete parts. I personally would love to see some kind of comparison between Burson's discrete op-amps and some of today's more advanced IC OP amps. Both measurement and listening test are important to me, as the device is for someone to enjoy, but measurement can sometimes pick up where people might have missed at first glance.
At first glance tho, I worry if it will fit into the case of DA-131, since it does not have a very tall case, you might want to double check with the actual unit in hand. from calculation, it will give you about 45mm of room... which might be a tight squeeze.
The output impedance is about 200 Ohm, very lot output impedance courtesy of BurrBrown's OP
, in fine condition.
to it more.
