These innovative bass strings use copper instead of stiff metals like steel or nickel, resulting in a richer 
acoustic performance due to the higher density of copper. Additionally, the strings feature a bioplastic 
monofilament core called ‘Sugar‘, which has excellent acoustic performance and is produced exclusively by Aquila 
on a global scale.

Revolutionize Your Sound with Our Groundbreaking Wound Bass Strings
These strings are truly innovative for at least two reasons. Firstly, they do not use metals like steel or nickel, 
that are stiff, but instead they use pure copper that is softer and has higher density and result in richer acoustic 
performance. In fact higher the density, better the sound. Secondly, these strings feature a bioplastic 
monofilament core called ‘Sugar‘, which is exclusively produced by Aquila on a global scale. Sugar has been 
proven to have superior acoustic performance compared to other plastic materials, as evidenced by laboratory 
measurements.

4-strings 18-21" / 46-53 cm scale

NOTE	Gauge mm	
A	2,20
D	1,82
G	1,44

HD330PRO
Professional Semi-open Headphone
HD330PRO is the circumaural, semi-open headphone which aims to attenuate ambient noise but allows the airflow 
generated by the vibration of the lamination to pass the well-designed grille hole on the earcup freely at the 
same time. It is suitable for most all kinds of the music.HD330PRO features with wide -range frequency respon-se 
and dynamic sound. Slightly forward sounding mids perfectly bring out the body and the emotion of vocals and 
instruments. Penetrating highs and bass deliver details and texture but not overstated.

HD330PRO gives you the“front row”sound image of the concert to enjoy the very rich sound while keep substantial 
spaces for precise soundstage between instruments. You will be pleased to be involved in the very intimate and 
engaging music experience of this headphone. HD330PRO is equipped with an improved headband design and softer 
velvet earpads to ensure wearing comfort and fit during long term use. HD330PRO is available in 32O and 150 Ohm
versions to satisfy different environment needs.

- Solid bass, emotional mids, and bright, beautiful highs
- “ Front row ” experience for very intimate and engaging music experience
- Extraordinary wearing comfort and fit during long term use
- Features with 32O and 150 Ohms two versions to satisfy different environment needs 

Driver:40mm neodymium
Impedance:32 Ohm & 150 Ohm
Sensitivity:93 dB
Frequency Response:10Hz-30KHz
Cable:2.5-meter(8.2 ft.)
Connector:3.5mm plug(Box included / 6.3mm adapter)
Net Weight:315g(11.11 oz)

NIGHT SUN Ceiling buckle