I'm not sure if the source question was directed to me, but I'll chime in...
Original source I used was a Playstation1 while I saved money. Upgraded that to an NAD 523 changer. Huge improvement. From the 523 to a Rega Apollo. Even bigger improvement. The 304 was good enough to show definite differences each time. Even non-hifi guys heard big differences.
Original turntable was a Technics SL-BD2 with Grado Blue. Upgraded that to a Pro-Ject 1Xpression. Added a Dynavector 10x5 and Speed Box. The only piece I didn't hear through the 304 at one point or another was the 10x5.
Regarding the 304 to 320BEE...
Everything is improved. Lows, mids, highs, noise. etc. Not a night and day difference IMO, but an overall improvement. You lose a phono stage. Gain a remote and 15 solid watts. Those 15 watts may seem insignificant on paper, but they become very obvious when driving speakers louder, in a larger room, more difficult speakers, etc.
I thought the price was well worth it for the 320BEE. I haven't heard the 315BEE. I heard very little difference between the 320BEE and 325BEE. Personally, I'd save a few bucks and get the right 320BEE over a 325BEE. If no good ones were available for the right price, then get a 325BEE.
JR
Original source I used was a Playstation1 while I saved money. Upgraded that to an NAD 523 changer. Huge improvement. From the 523 to a Rega Apollo. Even bigger improvement. The 304 was good enough to show definite differences each time. Even non-hifi guys heard big differences.
Original turntable was a Technics SL-BD2 with Grado Blue. Upgraded that to a Pro-Ject 1Xpression. Added a Dynavector 10x5 and Speed Box. The only piece I didn't hear through the 304 at one point or another was the 10x5.
Regarding the 304 to 320BEE...
Everything is improved. Lows, mids, highs, noise. etc. Not a night and day difference IMO, but an overall improvement. You lose a phono stage. Gain a remote and 15 solid watts. Those 15 watts may seem insignificant on paper, but they become very obvious when driving speakers louder, in a larger room, more difficult speakers, etc.
I thought the price was well worth it for the 320BEE. I haven't heard the 315BEE. I heard very little difference between the 320BEE and 325BEE. Personally, I'd save a few bucks and get the right 320BEE over a 325BEE. If no good ones were available for the right price, then get a 325BEE.
JR