UrbanVoyeur wrote in
news:9VvDf.2810$%e3.1094@trndny04:

Thanks for the review. For a better on-board pre-amp, consider one of
the mods from www.oade.com .

Doug improved mightily on the pre-amp in my Marantz 670, lowering the
noise and increasing the headroom. He offers similar upgrades for
several current flash recorders, including the R-4.

Doug's reply was "March 2006"