Thanks Acuujim, What is the o/p impedance of the Audio research ref One? Most high qulaity tube preamps have an impedance of 300-600 ohms. This I thought was too high for the amps input Z of 2200 ohms? Is this not true? If not, than this opens up a number of tube preamps that maybe candidates for use with the Sierra amp. Thanks
Best Preamp to drive Sierra Audio Amps?
I'm looking for a good quality preamp, either tube or solid-state to drive my new Sierra Audio Whitney power amp. The issue is that the amp as a low input impedance of 2200 ohms when using the balanced (XLR) connection between the preamp and amp. I was told that the EAR 864 tube preamp can drive load down to 300 ohms. Does anyone have any experience using the 864 with a ss amp with low Z? From a ss standpoint I was looking at the Sim Audio P-5 which has an balanced input impedance of 110 ohms. Would this preamp work without any sonic degradation? Thanks, Ken