Hi all, I just connected my Yamaha 2070 receiver front pre-out to the integrated amp esoteric F-05. The sound coming out is very low.. I have to run my receiver up to -20db to start hearing sound on the esotreic at about -45db. When i connect a network player directly to the integrated sound volume is much higher, similarly when the speakers are connect directly to the receiver. What can it be that is causing such low volume when going through the receiver pre-outs to the integrated? Thanks!