denis
100+ Head-Fier
Thanks SpudHarris. Just ordered the HE-4's and my P4 is on its way.
SoupRKnowva, I just received my P4. It sounds great. I will give a try with the transistor buffers and let you know my impressions. At the moment, the configuration is: 2 OPA 627 L/R + 2 BUF 634 + 2 HiC BUF
so you're not using anything in the ground channel?
thats really the only thing i was curious about, whats the difference between the G and the V that people keep talking about?
so you're not using anything in the ground channel?
I am using 2 HiC BUF in the ground channel.
i thought you were supposed to use normal opamp(eg not buffers) in the ground channel?
No, you can use them as ground/Vground and you can also use the 797's as buffers. If you look in the instruction manual it tells you which can be used where.
My favourite L/R is either OPA2111AM or OPA111AM (metal can) or ADA-4637-1-BRZ or OPA1641 (class A biased)
I always run the Hi-C buffers as nothing seems to sound quite as good, stacked BUF634's are good also but not quite as good.
I always have a dummy in the left side of ground sockets and an OPA627AP in the right side ground and to my ears that yealds the best results without too much thud when using sensitive IEM's.
Finding the best sound for you and your respective phones/dap etc is the fun in owning an Opamp rollable amp. Like you I still spend time tweaking, it's just I think I'm nearing the end of my tweaking journey (until the next best thing in Opamps comes along).
Enjoy!