Pair of Atma-Sphere M-60 Mk 3.3 OTL Monoblock Amplifier – Hand-Built Tube Powerhouse, Legendary Sound with stands

Condition:

• In excellent condition, came out of a working environment
• One Owner upgraded to 3.3 by Ralph from Atma-Sphere
• Includes upgraded 6' power cable

Pickup Preferred in our Audio Department or shipping can be arranged

158 W Clinton St

Dover, NJ 07801

7 days a week from 11AM - 6PM

Our in-house Technician is available M-F during store hours.

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Elevate an audiophile system with this Atma-Sphere M-60 MkIII an iconic, hand-built OTL monoblock tube amplifier renowned for transparency, musicality, and award-winning engineering. This amplifier delivers 60 watts per channel into 8 ohms (45W into 4 ohms, 80W into 16 ohms), capable of driving a wide range of high-end loudspeakers with authority and nuance.

Features

• Patented Circlotronic® OTL direct-coupled output
• True balanced XLR and single-ended RCA inputs
• Tube complement: 8 × 6AS7G and 4 × 6SN7 per channel
• Class A, all-triode differential design
• No global feedback exceptional clarity and speed
• Automatic biasing, built-in VU meter, and long tube life.

Technical Specs

• Output Power: 60W @ 8Ω, 45W @ 4Ω, 80W @ 16Ω
• Input Impedance: 100KΩ RCA, 200KΩ XLR
• Power Bandwidth: 2Hz–75kHz
• Frequency Response: 1Hz–200kHz (-3dB)
• Gain: 20dB
• Output Impedance: 4.1Ω
• Chassis (each): 17"W x 8"H x 13"D; 30 lbs without tubes.

Condition & Extras

This M-60 MkIII is in excellent operational and cosmetic condition fully tested, cleaned, and ready to ship. Includes original or upgraded tube set, power cord, and professional packing.

Atma-Sphere’s M-60 MkIII is a reference level amplifier for discerning listeners who value transparency, natural body, and musical authority. Own a piece of OTL history engineered and built in the USA.