GroundMaster – City Master Ultra Ground Enhancer By Puritan Audio Laboratories

The XB Diamond Mk II, an exceptional upgrade to the X Diamond Mk II, renowned for its remarkable performance in smaller listening spaces. Experience the perfect blend of superior sound and elegant design, a true hallmark of Estelon craftsmanship. Leveraging Estelon’s advanced and innovative engineering, these loudspeakers harmonize with the room’s acoustics to deliver an emotionally engaging listening experience. Enjoy a soundstage and musical detail that reveal recordings as they were meant to be heard.

The XB Diamond Mk II boasts a 1″ diamond tweeter, enhanced cabling, and a state-of-the-art crossover, providing extended high frequencies for a smooth, resonance-free acoustic experience. Elevate your listening experience with the XB Diamond Mk II’s exceptional transparency, precision, and unparalleled detail.

The XB Diamond Mk II features curved cabinet walls and an intricate system of interior chambers, ensuring the cabinet is completely “dead” and non-resonant. Each driver system is enclosed in an optimally shaped geometry, tailored to maximize performance. This advanced and sophisticated cabinet design allows only pure, uninfluenced sound to emanate from the high-performance driver elements.

Room dimensions and characteristics significantly impact the listening experience. At certain frequencies, pressure changes uniformly, much like pressing on a balloon. This phenomenon makes it difficult to pinpoint the exact location of the bass driver, allowing for flexible placement of the low-frequency driver separate from other drivers.

The XB Diamond’s woofer is strategically positioned near the floor to acoustically couple with the surface, maximizing efficiency and output. This placement enhances bass coherency and ensures a more even distribution of room-standing waves, making it easier to find an ideal listening position with minimal compromise in bass accuracy.

At frequencies above 100 Hz, sound reflections occur between the loudspeakers and various surfaces like walls, ceilings, floors, and furniture. In this range, where the sound wavelength is short enough for human hearing to detect its origin and create localized peaks and valleys due to standing waves, the positioning of the driver in relation to other drivers becomes crucial.

The mid-woofer and tweeter, which handle frequencies over 100 Hz, are grouped and positioned higher in the cabinets. This configuration minimizes reflections from nearby surfaces, ensuring a high degree of coherency and a stable stereo image from high bass notes to the highest harmonics.

Stereophile
“The Estelon XB Diamond Mk IIs possess a voice that’s distinctive while remaining in that desirable middle space in terms of the key sonic virtues—realism, tonal balance, timbre, etc—occupied by all speakers that reproduce music naturally, including acoustic music. Plus, subjectively, they sound low-distortion. A pristine instrument capable of (re)producing compelling music in any genre. Highly recommended. “

https://www.stereophile.com/content/estelon-xb-diamond-mk2-loudspeaker

Theabsolutesound
“this is not just one of the great floorstanding, direct-radiating loudspeakers; it is one of the greatest floorstanding, direct-radiating loudspeakers. Its relatively modest size (four-and-a-half-feet tall, a foot-and-a-half wide) and beautiful (and beautifully functional) shape make it ideal for modestly-sized-to-larger rooms (though Estelon’s bigger—and just as beautiful and innovative—transducers may better suit truly large spaces). Obviously, I recommend it. Indeed, I can’t recommend it highly enough. Which is why Alfred Vassilkov’s Estelon X Diamond Mk II is the 2021 winner of The Absolute Sound’s foremost honor, the Overall Product of the Year Award.”

https://www.theabsolutesound.com/articles/estelon-x-diamond-mk-ii-loudspeaker/

• Type : 3-way passive speaker, bass reflex
• Woofer : 220 mm (8.7 inches) Accuton, ceramic sandwich dome
• Mid-woofer : 158 mm (6.25 inches) Accuton, ceramic membrane
• Tweeter : 25 mm (1 inch) Accuton, diamond inverted dome
• Frequency Response : 22-60 000 Hz
• Sensitivity : 87 dB / 2.83 V
• Power Rating : 150 W
• Nominal Impedance : 6 ohms (min 3,5 ohms at 50 Hz)
• Minimal Amplifier Power : 30 W
• Dimensions : Height: 1260 mm (49.6-inch), Width: 420 mm (16.5-inch), Depth: 590 mm (23.2-inch),
• Net weight : 69 kg per piece
• Cabinet Material : Marble based composite
• Recommended Room Size : 20-50 m²