Mola Mola Announces New Mola Mola Ossetra Power Amplifier
October 21st, 2025
October 15, 2025 – The Mola Mola Ossetra is a 350W/8 Ohm full-bridge mono amplifier in a half-size chassis. With the Ossetra, Mola Mola has made another significant step forward in its proprietary Trajectum class D amplifier technology.
The design of the Ossetra began from a blank slate, extending its capabilities beyond the highest expectations.
In the power supply, Mola Mola achieved significant noise reduction while improving both dynamic and continuous output power. Combined with vastly increased current capability in the amplifier’s output stage, this design allows the Ossetra to drive practically any load.
The full-bridge output makes the amplifier design fully balanced from input to output.
All-new discrete class A gain stages were developed for this amplifier, enabling a revised gain structure for the entire system—resulting in exemplary noise and distortion performance.
With a bandwidth of over 100kHz, the frequency response remains absolutely flat within the audio band, ensuring minimal load dependency and consistency regardless of loudspeaker load.
The input stage distortion is below Mola Mola’s current measurement threshold at approximately -150dB (~0.000003%), ensuring immaculate performance from the power stage.
Specifications
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Output Power: 350W @ 8Ω, 700W @ 4Ω, 900W @ 2Ω
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Gain: 22dB or 28dB (switchable)
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Unweighted S/N Ratio: 130dB
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Distortion (THD, IMD): <0.003% (all frequencies and power levels)
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Input Impedance: 200kΩ
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Output Impedance: <0.002Ω (DF > 4000), all frequencies
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Bandwidth: >100kHz
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Inputs/Outputs:
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Balanced and unbalanced input (selectable by switch)
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Two pairs of Furutech binding posts
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Biwired directly to the amplifier PCB using Kubala-Sosna cable
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Trigger input (3.5mm jack)
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Dimensions: 200mm (W) × 110mm (H) × 355mm (D) — depth includes speaker terminals
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Weight: 7 kg
World Premiere and Availability
The world premiere of the Mola Mola Ossetra will take place on October 10th, 2025, with shipping starting in early December.
Technical Background
To push the boundaries of Trajectum technology, the Ossetra amplifier was designed completely from scratch—redesigning every aspect of the amplifier to achieve superior performance.
Power Supply
Meeting EMI regulations is mandatory for any electronics equipment, but for Mola Mola’s high-end standards, that’s just the beginning. The new power supply pushes those limits even tighter, achieving further noise reduction and improvements in dynamic and continuous output power.
The vastly increased current capability enables the amplifier to drive nearly any load. The full-bridge power amplifierdesign also eases the load on the power supply, simplifying design and improving stability. This configuration makes the amplifier fully balanced from input to output.
Modulator and Feedback System
The Ossetra introduces new discrete class A gain stages, which provide most of the gain needed in this high-feedback design. These stages have high open-loop bandwidth, each tailored to its specific role in the loop filter.
This allowed Mola Mola to optimize the gain structure, noise, and distortion across the system. The result is a power stage with outstanding control and refinement.
Input Stage
The input stage is also a new discrete class A design, serving to create a high-impedance input, add gain, and ensure that no DC or other unwanted noise enters the power stage.
It is DC coupled, with no capacitors in the signal path—minimizing sound degradation. The input stage uses a technique similar to that in the Makua preamplifier, where minor DC offsets are corrected dynamically, while higher levels trigger the introduction of a capacitor in the signal path for compatibility with third-party equipment.
New shunt voltage regulators are also featured in this stage. These provide exceptional noise rejection and low output impedance without the complexity of cascaded regulators.
Shunt regulators draw constant current from the power supply, directing it to the load as needed or dissipating it locally when not required. This design keeps AC currents localized, improving performance. The wide-bandwidth regulator design ensures consistent behavior across the entire audio band, minimizing coloration.
