Technology

Advanced High-End Audio System. Timeless quality with top materials and technology. Designed and handcrafted by Gravelli.

Perfectly Dampened Polymer
Concrete Enclosure

Custom-developed high-performance polymer concrete enclosure has no parasitic resonances and does not distort the true sound of speakers.

In case of musical instruments, like a violin or a trumpet, a highly resonant corpus material is needed to achieve their typical sound signature. In case of loudspeakers, the less the enclosure resonates itself, the better. A sound then radiates only from the speaker drivers and it is not distorted by any unwanted parasitic resonances. A monolithic concrete enclosure with multiple layers of vibration absorbing materials achieves this perfect result.

Ultra Wide Sweet Spot

Sound is evenly distributed and a “Sweet Spot” is much wider than usual.

In most situations, typical high end speakers deliver the best sound only in a very small and limited space, usually on the center axis and only in certain distance. This effect is called sweet spot. Thanks to its unique wide and even dispersion technology, Gravelli Bespoke Audio has much wider Sweet Spot, allowing up to 5 people to sit and listen within.

BMR Technology

In a traditional loudspeaker, the diaphragm acts as a “rigid piston” at low frequencies, but turns into a multimodal object when approaching its so called “breakup region”.

In a BMR, there is no “break-up region”. Instead, a limited number (usually 2 – 4) of evenly spread modes are carefully positioned within the frequency band. The modal, bending-wave operation starts in the frequency range where the piston-like operation of the panel would otherwise cause the driver to beam. The result is a drive unit that operates like a piston at low frequencies but becomes a bending wave device at high frequencies. Thanks to the bending wave operation, the drive unit demonstrates wide dispersion even at high frequencies. Acoustically, the behaviour of a BMR approximates to the ideal “point source”.

Highly Coherent and
Natural Sound

Custom-developed high-performance polymer concrete enclosure has no parasitic resonances and does not distort the true sound of speakers.

Highly Efficient, Long-throw, Passive Radiator Assisted Subwoofers

Thanks to custom tuned passive radiators, working perfectly matched together with our damped concrete enclosure and active DSP amplifier technology, we were able to achieve surprisingly strong and deep bass reproduction, which is normally impossible with enclosures of similar size.

Technical Specs

DIMENSIONS (WxHxD)	150 x 380 x 280 mm
WEIGHT	2 x 16 kg
CONSTRUCTION	DSP controlled, passive radiator assisted active two-way
CABINET CONSTRUCTION	Hybrid multi-layer polymer-concrete sandwich
POWER SUPPLY VOLTAGE	230Volt AC/50Hz +/-10%
POWER CONSUMPTION	Typical 15 W, in standby mode 0.2 W
OPERATING CONDITIONS	10-40° C, 50-105° F
POWER AMPLIFIER, BASS SECTION	100 W, ucD
POWER AMPLIFIER, FULLRANGE SECTION	100 W, ucD
SIGNAL TO NOISE RATIO	104 dB
TOTAL HARMONIC DISTORTION+NOISE (THD+N)	Typical 0.05 , Maximal at 100 W 0.07
EFFECTIVE FREQUENCY RANGE	40 Hz – 22 kHz
CROSSOVER FREQUENCY	300 Hz
BASS DRIVER	5 inch ultra long-throw vented coil
PASSIVE RADIATOR	7 inch linear long-throw
FULLRANGE DRIVER	4,5 inch wide dispersion BMR with vented coil
STEREO INPUTS	Analog 2 x cinch, digital 1x USB 1 S/PDIF
MAX.ANALOG INPUT LEVEL	2.2 Volts
SUPORTED DIGITAL SAMPLING RATES (in kHz)	32, 44.1, 48, 88.2, 96, 192
SIGNAL TO NOISE RATIO	104 dB
TOTAL HARMONIC DISTORTION+NOISE (THD+N)	Typical 0.05 , Maximal at 100 W 0.07