VELVET VL48 Loudspeakers




Designed and handmade in Italy in the heart of the city of Milan
Result of the UBSOUND passion for audio since 2011

Floor standing tower (15 kg /33 lb each)
100W – 2 way – 8 Ohms – HDNSS
45° curved asymmetric front bass reflex
High definition natural sound signature
Designed, engineered and made in Italy
Hand applied multi-coat paint finishing
Spade, banana, stripped cables allowed

5,000 USD (Pair)

Free shipment worldwide
3 year full warranty

The excellent sound performance of these loudspeakers originates from the implementation of the exclusive HDNSS technology invented, designed and developed in Italy by UBSOUND


The wooden external of the loudspeakers is finished with a special multi-coat paint, strictly hand applied with the use of high quality paints.

Every single detail is the result of accurate processing and selection of premium materials.

A unique, attractive and minimal design, an unmistakable urban-style look that adapts to any furnishings.


Based on the principles of the HDNSS technology, we define our loudspeakers as “designed by sound”, that is to say the structure, design and materials of the loudspeakers are simply the result of what is really needed to achieve the desired acoustic signature, without any compromise.
Those are the real technical-acoustic, acoustic-dynamic and electro-acoustic needs for a better listening performance.

Designed specifically for audiophiles, professionals
and discerning customers in the Hi-Fi segment

You will be fascinated
by the overall performance
of your new
Velvet loudspeakers


The formula of HDNSS acoustic technology is based on several criteria and related algorithms, part of which are confidential and not disclosable. In the design process, the acoustic engineering of HDNSS technology emphasizes the physics and acoustic-dynamic approach rather than an electro-acoustic approach, as other brands tend to do.

UBSOUND firmly believes in a better acoustic result thanks to the help of this technology, restoring a more natural harmony and an experience which seems more analog rather than digital.

The HDNSS technology studies rely in part on the theories of the mathematical physicist Manfred Schroeder regarding the internal resonance of the loudspeaker and its soundproofing.

One application of our HDNSS technology is in relation to the soundproofing of the internal wooden panels of the loudspeaker, for which specific sound-absorbing coatings of different sizes, thicknesses, angles and materials have been used.

The perfect sound does not exist, but with this exclusive technology UBSOUND has been able to create a pure, natural and balanced sound. A sound that succeeds in reproducing an impressive amount of sound details with high fidelity, while retaining a slightly warm tone thanks to the exclusive implementation of the 45° curved asymmetric bass reflex that plays a fundamental role in the homogeneity of the propagation of low frequencies below 200Hz. This generates an excellent listening soundstage.

The goal of HDNSS technology is to create an excellent natural and high definition acoustic signature, hence the acronym “High Definition Natural Sound Signature”.


Dimensions (H x W x D) – 92 x 26 x 30 cm
Maximum power input – 100W
Suggested power input – From 15W to 80W
Bass-reflex – Front, asymmetrical and 45° curved
Impedance – 8 Ω
Sensitivity – 88dB (2,83V/1m)
Frequency response – 33 Hz – 22.345 Hz
Maximum harmonic distortion – < 1%
2-way coaxial hybrid driver – 21cm (8,3 in) Ø
Positioning – Floorstanding tower
Weight – 15 kg/33 lb
Terminal connection – Stripped, banana, spade
Recommended running-in period – 100 hours
HDNSS – High definition natural sound signature


Diameter: 21 cm (8,3 in)

Pure, natural and balanced sound



The terminals allow for connections using stripped cables, cables with banana plugs or spade terminals.
The UBOUND Velvet Series passive loudspeakers can be used with digital amplifiers, integrated, analog, valve tube, classic or class-A, high current, standard 2-channel stereo systems, compact systems and 5+1 systems using the two Velvet loudspeakers as front monitors in the left and right channels.
They are also suitable for the “pure direct line” system (no equalization) available on some amplifiers; also suitable for those who simply want to replace their home hi-fi system loudspeakers in order to achieve significantly better sound performances.
Suitable for both professional and domestic use for the most demanding users.


The manufacturer’s special 3 Year Warranty of the loudspeakers can be activate by carefully following the simple steps described in the two “Official Numbered Warranty Certificate” cards attached to the terminal audio contacts on the back of each loudspeaker.

Each numbered warranty certificate covers the relative loudspeaker, therefore both must be activated using the two different serial numbers.