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Guitar Power Amp • Technology: Hybrid • Power: 2 x 45 W • Impedance: 4/8/16 ohms • Inputs: 2x ¼" jack • Outputs: 6 x Jack • Design: 19", 1U • Fan: yes • 5,5 kg • Returned Article • The Koch Amps ATR-4502 is an alternative to heavy and sensitive full-tube amplifiers. This hybrid power amplifier works with 2 x 12AX7 driver tubes and a Class A transistor output stage. The power amp section is based on the Jupiter series of amps. The ATR-4502 delivers the following output power depending on the impedance of the speaker used: 90 watts at 1 x 8 ohms (mono operation) or 2 x 16 ohm stereo operation, 70 watts at 16 ohms (mono- operation). The minimum impedance is 8 ohms! The input level is switchable, the output stage is protected against short-circuit - 2 fans protect the ATR from overheating.
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