Okay, I've had the equipment a few weeks now and played well over 100 hours of music. I have the Oberon 5's, Denon DP-400, Cambridge Preamp Phono and my old Yamaha amp.
The sound to me isn't right, I guess I don't know what it SHOULD sound like but it sounds very flat. ...
Sounds FLAT?
Two things spring to mind -
Speaker Wiring - make
ABSOLUTELY SURE BEYOND A SHADOW OF A DOUBT that the speakers are wired correctly. That in every case the
Amp(Red+) goes to the
Speaker(Red+) and black to black. Nothing will suck the life out of a system like one of the speakers being wired backwards.
In this out-of-phase condition large swaths of frequencies are cancelling each other out.
Speaker Placement -
DO NOT put your speaker back up against the wall or deep into a corner. All speakers need space around them. Boundary Effect, the bass boost of being near the wall, does not show up so much as bass boost, but rather a recess and muddiness in the Mid/High. If your speakers sound flat, then give consideration to placement.
Dali speakers, in general, sound anything but flat.
Turntable Connections - Though it would sound substantially more than Flat, you must make sure that you ARE using a Phono Equalization Stage, and that you are only using ONE Phono Equalization Stage. The key is Equalization. The response from the turntable cartridge is not flat because the music on the Album is not flat. The bass is Cut and the Treble is boosted. On playback you apply the opposite equalization, that is why Turntable specifically need a unique PHONO connection or an external Phone Equalization Pre-Amp.
However, in this case it would not just sound flat, rather the frequency spectrum would be completely off. With no equalization pre-amp, you would have no bass and way over amp'd Treble. With two pre-amp in the chain, you would have over hyped bass and very recessed treble. That does not sound like your problem though.
Jumper Bars - Likely the speakers can be Bi-Amp, that is they have FOUR Speaker Terminals on the back of each speakers. If this is true, then there are Jumper Bars or Bridges between the Woofer Red(+) and the Tweeter Red(+) and between the Woofer Black(-) and the Tweeter Black(-).
If one of these Jumper Bars is not making contact, and the Tweeter is not in the circuit, the speakers will indeed sound very flat. Make sure both those Jumper Bars are in place and making contact, and that both woofer and tweeter are working.
I think like the first two listed are the more likely problems.
Steve/bluewizard