Your options will provide inconsequential improvements.
Consider isolation for your preamp and then digital and then amp. Digital hash plays havoc with sensitive amplification. Even fairly modest older MIT Z Stabilizer 2 (plugged in parallel) will likely improve your sound quite dramatically.
Consider isolation for your preamp and then digital and then amp. Digital hash plays havoc with sensitive amplification. Even fairly modest older MIT Z Stabilizer 2 (plugged in parallel) will likely improve your sound quite dramatically.