DH 500 caps are probably on borrowed time. I sold both of your units in the early 80s and while both were best buys then.....it's time to move on. You might consider an integrated for that kind of coin. Odyssey sells the Cyclops for that and a used Anthem 225 goes for a bit more than a grand. You do need some current to power those B&Ws.
9 responses Add your response
I used to own the exact Marantz you're considering, the PM8004. Great build quality, nicely done, easy to use. But I made the mistake of trying to pair it with a pair of B&W PM1 monitors - that was not a good combination. Just not enough power, and my listening room is only 12x12. On paper, the N804 may actually have a higher sensitivity rating than the PM1 (I think it's 89dB vs. 84 on the PM1), but I'm guessing they're just as power-hungry as the little B&W monitors. I would own Marantz again, so not knocking the brand in any way, but for B&W N804 I'd go for more power.
Sensitivity on paper for N804 is far away from actual. Same class speakers such as Totem Forest(86dB/W/m) would outscream N804 driven by amps that are in 50...60wpc range while N804 would require 4x much to give same SPL.
For tiny-bit more I'd recommend Bel-Canto E1-300s integrated amp. By so far I believe that it's one of the best possible matches for N804.
If it were me, I'd recap the Hafler and spend the rest on a nice used tube preamp or seek out a B&K EX442, PS Audio 200C, Perreaux, or Acoustat TNT200 and tube preamp...I'd probably do the latter and seek out a new amp instead of recapping the Hafler although the Hafler is a very fine product and if you like it, then go for the recap...
Jhm007, your speakers will have very similar impedance/phase angles as the 804d.
And this while reasonably efficient (90db) are a be of a nasty load, they don't need a lot of watts, but what they do need is an amp that can deliver good current. So an amp that can come close to doubling it's wattage for each halving of impedance will do nicely.
100w into 8ohms
180w-200w watts or close into 4ohms
350w-400w watts into 2ohms