I had a TFM 35 years ago, and was always curious myself. I've heard they sound the about same from some, and did away with the actual TFM sound, and just got the THX rating, from what others said. Bob Carver already left the company I think, but not positive. I looked at your planar speakers (sound great I imagine) and they recommend up to 200 watts max. I don't see any need to run them bridged. The amps already give 250 watts@ 8 ohms, 350 watts@ 4 ohms. Without the bridging, they will have more power if your speakers dip below the 8 ohm average, and that's common for a lot of speakers do this. In bridged mode, 8 ohms was the lowest ohms they'll handle going by memory. I've had plenty of amps in my system, and never heard one in bridged mode sound as good as the regular stereo mode. Try them both ways, and you may agree. Don't forget, the audio signal has to go through twice as many gain parts ( left and right combined ) in bridged mode, instead of its normal stereo mode. If it does sound better to you also, you won't need the extra amp. The speakers don't appear to need all the extra power, if they even get as much, with any lower (below 8 ohm) dips. I hope this helps.
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