I also installed a new power switch. Knowing how good my 304 sounds, I couldn't resist upgrading the caps in the audio sections of this 314.
The coupling caps are now all nichicon Bipolar, with nichicon Fine Gold and ELNAs used elsewhere. As preventative measures, I have upgraded the Speaker Relay from 5 amp to 8 amp, and upgraded two resistors in the Power Amps known to fail from 1/2 watt to 1 watt. The switches and pots have been cleaned with Deoxit D5 and Fader F5.
I even performed a mechanical upgrade by squeezing each Input Select Rod to its switch with cable ties. I was noticing that each time I changed the input selection, the unselected Rod would pop out slightly and partially separate from the switch; a silly failure just waiting to happen now avoided.The 304/314 are an all-discrete design featuring the same 4-transistor Phono Preamp utilized from the 3020A and into the Monitor Series. AFAIK, these amps were also the first by NAD to feature a Class G Power Amp design before the "Power Envelope" terminology became popular. This early design also appears to have focused on "speed", as the pre-driver transistors in the Power Amp are HiDef Video drivers with an fT of 150 Mhz.
This little beast is ready to PLAY! Please message me with any questions, corrections, etc.This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "davideck" and is located in this country: US. This item can be shipped to United States.