Originally Posted by Jim Williams
If the gain blocking cap is removed, you will need to use a matched transistor pair like the AD MAT03. Otherwise, transistor mismatch will increase the DC to saturate the transistors.
So matching transistors like the 2N10803/4/5 for hFE is not enough? I've found that mismatches of 3-4 points (like 204 / 208 on the hFE) meter to be insufficient to be able to use the full gain range, but matching is difficult because of temperature sensitivity.
BTW, it was a big surprise to me how much better the 1085 sounds compared to the stock transistor. I was expecting less noise, but it turned out to be a lot less grainy, better bass, sweeter high end etc. Would the AD MAT03 sound as good?