BAT or Sonic Frontiers w/ Martin Logans?

I have a pair of Martin Logan Sequel II speakers with Sonic Frontiers Line 1 and Power 1 amplification. I auditioned the BAT VK 3i and the Sonic Frontiers Line 1. Both units offer excellant quality, good value, and similiar prices and sound quality. After all of my searching for a tube preamp, my choices were between the BAT and the SF. I was in a quandry when it came time to purchase. Ultimately, my decision was made when I purchased a dealer's demo unit at an excellant price. I think you'll be happy with either one. Good luck!

A Line 1 isn't going to add a great deal of warmth. Even with NOS tubes mine is still pretty neutral sounding. I have no knowledge of the BAT, but will suggest adding Audible Illusions and Cary to your review list if "warmth" is the goal.

I have Martin Logasn Quests that I run with an Audible Illusions Model 3 preamp and a McCormack DNA-1 with SMc Audio's Level A+ mods. Interconnects are Sysnergistic Research. mSpeakers are bi-wired with Kimber 8g. I get great warmth, but incredible imaging and detail as well. I second the recomendation to take a look at Audible Illusions.

I'm using an Audio Research SP14 preamp with (2) Classe DR8 amps, makes the Quests sing real nice...

I'm currently using a Sonic Frontiers Line 2 and Conrad Johnson MF2200 amp with aerius speakers. Yes, the Line 2 is not going to add "tube warmth" but this combo is very neutral and detailed. Especially musical using balanced outputs.