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In the Forum: Audio Discussions
In the Thread: NAT Audio Magna -160 Watts of Single-Ended Class A
Post Subject: Not all high power tubes are based on transmitting tubesPosted by morricab on: 11/16/2007

Hi Romy, KR audio is making high power SET and parallel SET amps using tubes designed by them specifically for low frequency amplification (read as in not radio frequencies).  They are getting the power with lower voltages and higher currents than from transmitting tubes and their output transformers are some of the only ones I have seen measurements for that show essentially no core saturation.  The VA350 model I have is down about 1 db at 25khz and -3 db at 40Khz, so a wide enough bandwidth and bass to 5 Hz...at about 5 watts of power.

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