Review: Air Tight ATM-1 2024 Edition power amplifier reviewed by Stereophile

"The ATM-1S employed Hashimoto transormers; the ATM-1E uses Tamura transformers, including the Tamura choke coil located ahead of the Tamura power transformer. While both amps use EL34 power tubes, the ATM-1S used one 12AX7 and two 12AU7s; the ATM-1E works one 12AT7 (for voltage gain) and two 6CG7 tubes (for phase inversion). Like the ATM-1S, the ATM-1E has a meter that allows the user to confirm that the power tubes are running in the correct range."

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