A-309 12-Inch/15-Inch Coaxial Speaker 2 Way 2-Unit HiFi Monitor Floor-Standing Speaker With 8 Ohm/400W 500W Loundspeaker

Sound with Warmth

Acoustic Theory vs. Real Listening Perception

Design Philosophy Blends Visual Aesthetics,

Technology Empowers Artistic Sublimation

Centennial Heritage, Tribute to Classics

Celestial Sound Series coaxial floor-standing speakers inherit the profound heritage of century-old British coaxial audio technology. Insisting on the ultimate pursuit of sound and continuous technical exploration, adopted globally renowned coaxial technology, turning every listening moment into an extravagant musical feast.

Coincident Coaxial Design for an Ideal Point Source

Celestial Sound series coaxial speakers feature coincident tweeter and mid-bass drivers, enabling fully aligned acoustic centers across treble, midrange and bass. The proprietary Tulip WaveGuide directs sound waves forward, eliminating phase distortion resulting from separated frequency bands. It maintains consistent phase during sound propagation, delivering seamless frequency transition, precise soundstage imaging, smooth uniform timbre, pinpoint localization and expansive sound field.

Full-Range Reproduction for Ethereal Vocal Performance

Spanning from deep bass at 33Hz up to ultra-high frequency of 32kHz, Celestial Sound coaxial speakers accurately reproduce all frequency signals along a single unified axis. This drastically enhances sonic clarity and brings out every subtle musical detail to full perfection. It particularly excels at rendering lifelike, ethereal human vocals.

Acoustically Tuned Cabinet for Outstanding Performance

Celestial Sound Series adopts cutting-edge acoustic engineering design. Its front-firing port integrates aerodynamic frequency resonance principles while offering flexible speaker placement options.

Crafted from high-rigidity high-density Australian pine board, the acoustic cabinet efficiently dissipates and absorbs unwanted internal standing waves and cabinet resonance, minimizing low-frequency standing waves to deliver deeper, more powerful bass. It overcomes the common weak low-frequency drawback of conventional coaxial speakers.

The cabinet surface is veneered with matte North American black walnut wood. The calm, solid and understated design language embodies Sibach̢۪s persistent pursuit of premium quality and brand craftsmanship.

High-Fidelity Sound with Remarkable Soundstage Performance

Celestial Sound coaxial speakers deliver near-perfect point-source acoustics for exceptional soundstage imaging. They render every sonic element to the fullest: powerful and dynamic bass, rich luscious midrange, as well as delicate ethereal treble, achieving authentic high-fidelity sound reproduction.

Adjustable Crossover Technology

Our electroacoustic engineers conducted extensive repeated tests. The crossover circuit is equipped with polypropylene capacitors and premium inductors to create an ultra-clean signal path, drastically cutting audio transmission loss and preserving maximum musical details and emotional nuances.

This crossover system supports bi-wiring, with adjustable crossover points and treble gain for highly customizable tuning. You can tailor the sound signature according to music genres, room acoustics and matching audio equipment. Whether vocals, string ensembles or symphonies, Celestial Sound speakers deliver fully expressive, lifelike audio performance.

ROLL OFF

0: Crossover point at 2.2kHz

-1.5: Crossover point at 2.0kHz

-3.0: Crossover point at 1.8kHz

HIGH

0: Flat treble setting

-1.5: Treble attenuated by 1.5dB

-3: Treble attenuated by 3dB

+1.5: Treble boosted by 1.5dB

+3: Treble boosted by 3dB

Premium-Grade Coaxial Drivers

Celestial Sound Series is equipped with a 1.75-inch tweeter featuring a PEN diaphragm. Paired with an exquisite horn structure and phase plug, it allows treble to pass through the mid-bass resonance zone swiftly, delivering precise directional sound radiation and authentic high-frequency imaging.

The mid-bass driver adopts specially modified easy-drive cone paper imported from Britain and aerospace-grade Y35 ferrite magnets. The customized cone withstands intense transient high-pressure impacts, bringing outstanding transient response and sound pressure levels. It renders relaxed bass and lifelike natural vocals in the midrange.

The fabric surround is engineered with long-throw fatigue resistance in mind. Its excellent flexibility and elasticity rival speaker drivers found in hundred-thousand-yuan flagship speakers.

Celestial Sound Series Coaxial Floor-standing Speakers

Specifications

Speaker Type: 12-inch Coaxial Speaker / 15-inch Coaxial Speaker

Driver Configuration:

12-inch model: 1.75" Tweeter + 12" Mid-bass

15-inch model: 1.75" Tweeter + 15" Mid-bass

Crossover: Adjustable Crossover Network

Rated Power: 250W (12-inch) / 300W (15-inch)

Peak Power: 400W (12-inch) / 550W (15-inch)

Sensitivity: 93dB (12-inch) / 95dB (15-inch)

Impedance: 8 Ohms

Frequency Response:

12-inch: 36Hz–32kHz (±3dB)

15-inch: 33Hz–32kHz (±3dB)

Crossover Point: 2.3kHz for both models

THD: â‰Â¤1% @ 85Hz–20kHz (2.83V / 1m)

Cabinet Finish: 18mm high-density Australian pine board veneered with matte North American black walnut

Side Panels: Matte golden poplar burl veneer, 30mm Australian pine board with copper-plated aluminum trim rings

Grille Material: Custom high-airflow woven dust grille with elegant inlaid copper trim strips

Grille Color: Noble Dark Coffee

Dimensions (W × H × D):

12-inch: 450 × (860+40 base+25 spike) × 260 mm

15-inch: 600 × (910+40 base+25 spike) × 360 mm

Net Weight: 33.5 KG per unit (12-inch) / 49.5 KG per unit (15-inch)