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The Tsakiridis Devices Apollon Ultra KT120 mono blocks are high-performance tube amplifiers designed for audiophiles. Each mono block delivers 150 watts into 8 ohms using 8 KT120 power tubes and 4 12AT7 driving tubes arranged in a dual push-pull Class AB1 configuration. The amplifier features handmade multilayer output transformers and a handmade 400W power transformer to ensure excellent soundstage and detail retrieval. It uses high-quality components such as Mundorf EVO signal capacitors, metal film resistors, and gold-plated RCA connectors. The amplifier supports both RCA and pseudo-balanced XLR inputs, with true balanced XLR inputs available on request. The design minimizes electromagnetic interference through twisted pair power cables and careful transformer positioning. Dimensions are approximately 24.5 x 53 x 23 cm, and each unit weighs 22 kg. The Apollon Ultra is handmade in Greece and represents nearly 20 years of development, offering a unique sonic experience with the ability to drive power-hungry loudspeakers effectively.
Amplification power output and characteristics
Analog signal output specifications
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The AW180's power @ 8ω is 250W against the Apollon Ultra KT120 Mono Blocks's 150W, its output impedance 0.008Ω against 6Ω, and its input sensitivity 1.0V RMS against 0.3V RMS. Both share class (AB).
The Maestro Anniversary's signal-to-noise is 100 dB against the Apollon Ultra KT120 Mono Blocks's 85 dB, its output impedance 0.2Ω against 6Ω, and its input impedance 47Ω against 100Ω. Both share power @ 8ω (150W).
The V20's power @ 8ω is 24W against the Apollon Ultra KT120 Mono Blocks's 150W, its signal-to-noise 92 dB against 85 dB, its output impedance 0.47Ω against 6Ω, and its input impedance 35.4Ω against 100Ω.
The Silver 88's power @ 8ω is 80W against the Apollon Ultra KT120 Mono Blocks's 150W, its output impedance 0.5Ω against 6Ω, and its input sensitivity 1.0V RMS against 0.3V RMS. Both share input impedance (100Ω).
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