Усилители мощности моно — Mola Mola Ossetra

Built as a single-channel design, the Ossetra comes from the Dutch company Mola Mola, and the maker describes it as another significant step in its own Trajectum class D technology. According to Mola Mola, the design started from a blank sheet, with every aspect of the circuit redesigned rather than carried over from earlier products. It follows the Kaluga, which the brand names as its predecessor, and each channel needs its own chassis.

Key specs that matter

Rated output is 350 W into 8 ohm, 700 W into 4 ohm and 900 W into 2 ohm. Gain can be set to either 22 dB or 28 dB. Noise sits 130 dB below full output, unweighted, and Mola Mola states distortion, both THD and IMD, below 0.0002 percent across all frequencies and power levels. Input impedance is 300 kohm, output impedance is under 0.0015 ohm, which the maker translates into a damping factor above 5000, and bandwidth extends past 100 kHz. The enclosure measures 200 mm wide, 110 mm high and 335 mm deep, and it weighs 7 kg.

Engineering and use context

The Trajectum platform is Mola Mola's in-house approach to class D amplification, and the company positions the Ossetra as an amplifier that goes beyond the usual arguments about amplifier class. Keeping distortion under the stated limit at every power level rather than only at a single test point is the central claim of the design. With such a low source impedance, the amplifier holds a speaker's cone motion firmly even where its impedance curve swings, and the ability to continue scaling power into very low loads shows the output stage is built for demanding loads. The narrow case allows a pair of monoblocks to sit side by side on one shelf or be placed close to each loudspeaker so that runs of speaker cable stay short. A 6 dB gap separating the gain options is large enough to matter with sensitive speakers, where the lower value keeps the volume control in a more usable range.

Pairing

The rear panel offers balanced and unbalanced inputs chosen with a switch, so the amplifier works with either type of preamplifier output. Two pairs of Furutech binding posts are fitted, and a 3.5 mm trigger input lets both monoblocks power up from a signal sent by another component. Mola Mola's own Makua preamplifier is the matching control unit from the same maker, and the two selectable gain values help align overall system gain with preamplifiers of higher or lower output level.

Alternatives

For a buyer looking at the older generation, Mola Mola's Kaluga monoblock is the model the Ossetra replaces.