You guys are mixing M3100's with DSP3100's.

DSP3100's (Digital) will not connect to your analog preamp.
M3100 (Active Analog) will connect.

Saltire's are DSP3100's.
The ones SpinalTap refers to are M3100's.

Also you would toss your Amp, since your analog preamp would connect directly to the Speakers.

- Fiddler (IMHO)

If you think listening to music is fun, try learning an instrument.
HT: G61RSL, 4x5K, 5.5KHC, 2xSC6000, Transporter, HD621, Philips BDP7501 4K, Tivo, 65" LG OLED 4K C6
Computer: Foobar2000, 5K, Mojo, HiFiMan HE1000 V2