I am using a Benz M09(now M2) on a VPI JMW 10.5/Aries combo with my Signature.The Benz had a medium output of 1.0mV and matches wonderfully. Im driving this into a ARC LS15 pre amp. Two things I recommend with your SFP-1 Sign is to use a good PC instead of the stock one, (Cardas/HT/Shunyata) and I replaced the 4 Gold Aero tubes with Mullard CV 4024 (12AT7A) avail from Upscale audio,(about $30.00/tube) and the 6922's with a pair of Siemens NOS 7308 gold pin.(about$ 150-175.00/pair) These upgrades alone will dramatically improve the sound of the pre.
Good listening!
Good listening!