- Benchmark AHB2 + DAC3B + HPA4 = awful with SR1a
- Benchmark AHB2 x 2 + DAC3B + HPA4 = not so awful but not great (my 2 channel reference gear)
- Benchmark AHB2 x2 + AudioMirror Tubadour III SE (AMT3SE) tube DAC + HPA4 = very good
- CODA CSiB (from July 2018 build) + AMT3SE DAC = 10/10
- CODA CSiB + Benchmark DAC3B = 9/10
- KRELL K-300i + internal DAC = 7/10
- KRELL K-300i + AMT3SE DAC = 10/10
- RAAL HSA-1b + Benchmark DAC3B = 9/10 but I was not able to test with XLR which is better
- CODA 07x preamp (not delivered yet) + AMT3SE DAC + Benchmark AHB2 single amp = TBD
I sold the CODA CSiB and use the KRELL in another room now which does not have the RAAL amp interface box or a better external DAC.
I wrote a long write up about this testing I did in the Headphone section title "Best Speaker ..."