Jeff Rowland amp owners: What's your pre-amp??

Just noticed that some pre-amps are "DC coupled", such as the EC-4.7 from electrocompaniet . What's the advantages and disadvantages of using the DC coupled pre? Is there any concern of using this type of pre's with rowland gears?

Thanks Raquel for your detailed explanation on impedance matching, it really helped me a lot.

Thanks Daveyf for the recommendation on CAT pre.

With 'only' 5 years delay I rediscovered this thread.. . I am using a JRDG Model 312 stereo amp. I have driven it with the following fully balanced pres, in ascending order of preference. . . from lowest to highest:

ARC Ref 3.
JRDG Capri.
JRDG Criterion.

312 has same input impedance of approx 40K Ohms as older 302. None of the pres I used exhibited impedance mismatch issues. But Capri and Criterion, with balanced output impedances of 80 and 60 Ohms respectively, yield IMO most preferrable results. G.

I am glad Guidocorona restarted this thread. I am using a Herron VTSP-3A with my Rowland Model 10 and it is a wonderful match. I have tried a number of preamps with the Model 10 and do not find that balanced vs single ended matters as much as the quality of the preamp. The Herron is single ended, but is dead silent with the Model 10. The detail, transparency, tonal reality, frequency extension, bass, and soundstaging are superb. I have tried a number of highly regarded amps of recent vintage including the new Modright, Ayre, and the newest Spectrons used as monoblocks and none of them measure up to the Rowland Model 10. It is a keeper. The same goes for the Herron preamp.

DC coupled? Sorry I'm five years late, but DO NOT use a solid state amp with a DC coupled preamp. They can (not always, but once is more than enough) cause a significant surge on powering up, and that can literally fry a solid state amp. I know from experience- my NEW P-3 is DC coupled. Cooked both ICE modules in my Rowland 102 and actually set fire to an Audio Research D130 amp- which was damaged beyond repair and had to be junked. I now use an EAR 868 preamp, but I'll use the NEW in a back up rig with tube amps only. Rowland designs his preamps to mate well with the character of his amplifiers, so in the long run, you may well have been best off to go with a JRDG preamp.