The ULTRA 55's technology and performance are essentially identical to the critically acclaimed and award-winning ULTRA 9 and ULTRA 11, but in a form factor that is far more adaptable to a greater number of sound rooms given its footprint and overall height.​ The ULTRA Line of flagship loudspeakers deliver unprecedented holographic imaging and tonal purity. Bi-wire inputs included.

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• Extremely low distortion, class-defining clarity, three dimensional image focus, and lush harmonic structure set a new world standard.

• MasterBuilt Ultra Internal Wiring comes standard on the ULTRA Line. Each signal path is individually shielded and damped with point to point connections. Designed by leaders in the Aerospace industry and made with rare and precious alloys. It’s simply the most transparent signal path available.

• Incorporating exotic ceramic woofer and midrange drivers unique to the ULTRA Line of loudspeakers as well as our critically acclaimed Beryllium tweeters and ambient ribbon tweeters.

• Point to point hand built networks with isolated architecture that protects crossover parts and wiring from electrical noise contamination.

• Version 2.0 Aktive Cabinet Vibration Control, eliminating cabinet noise with new materials and layering techniques.

• Time Alignment, Phase Consistency, and adjustable bi-polar sound radiation pattern for room-filling sound.

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SPECIFICATIONS

FREQ RESP: 20Hz - 40KHz

 

SENSITIVITY: 89dB @ 1w/1m

 

IMPEDANCE: 4ohms

 

REC. MIN. POWER: 60 watts

 

SIZE: 42" x 13" x 24"

 

WEIGHT: 190 lbs each

 

FOUNDATION AMP POWER: 700 watts RMS

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5-year manufacturer warranty

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$120,000 for the pair

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Notable awards

• 2021 Stereophile Recommended Component― Class A

• SHOW STANDOUT - Florida Audio Expo 2019

• BEST OF SHOW - Florida Audio Expo 2019