Could use some help with a tough match

I agree with Undertow, 75K input impedence should not be an issue at all for any preamp that I'm aware of.

You might want to look at the Blue Circle preamplifiers. They all have adjustable gain to match your amplifier and preamplifier.

Second (or third) that 75K input impedence would not be a problem for a tube pre-amp.

Thank you for all of your great feedback. What started this thread is I was looking at a BAT VAT 51se so called BAT and Threshold directly to discuss compatability. What prompted the call was the Stereophile review of the BAT which cautioned against matching low inpedence input on some amps with the BAT's 410 ohm balanced output. BAT said that it should be ok but running a balanced unit into unbalanced amps would certainly would not allow me to get the maximum performance the preamp is capable of. Threshold told me I would not have close to the 10x ratio that is the general rule of thumb for a good match. Also that a lot of tube gear had high output impedence. I must admit that the feedback I am receiving from each of you is different so I am a little confused. I really appeciate the input because I need to narrow the field a bit before I can shop for the appropriate preamp. My SA 1's have always served me well ( Maggie's, Thiel's) which is why I really wanted to match them up. I currently have 2 Threshold pre's but time to upgrade to current technology (a remote control :}