








Ultra-sonic quadrant Hessian Flagship Hesse BN9
Rear unit double-duct in-ear headphones with higseparation and high resolution for female poisoninstrumentjazz dynamic earplugs
Single crystal copper silver-plated wire
Rear unit double tube in-ear
3.5/4.4 interface
Overall sound balance
Excellent performance of female vocals on jazz instruments
High resolution and high resolution

Overall listening experience
Following the MN8, our previous generation dual-usemonitor and HiFi product, we introduce our new flagship HiFiproduct, the BN9. The BN9 utilizes superior drivers that havebeen carefully screened and tested to ensure optimal sound quality.
Both the BN9 and MN8 maintain very low harmonic distortion. TheBN9 also references a universal standard curve, resulting in a smootlfrequency response and a well-balanced overall sound.Furthermore, the BN9 delivers clear and rich overtones, and theseparation of various sounds is crisp and clear. Each note hasexcellent texture, power, and volume. The low-frequency depth,elasticity, and volume are all excellent. The overall sound is brightand transparent,with excellent separation.

sound style
By listening to various types of music, BN9performed very well in jazz,instruments, andfemale vocals
nnovative design:
The rear driver leaves a large space for the front chamber, and bydeeply excavating the front chamber, the front volume issuccessfully expanded to about 10 times that of conventionalheadphones.This design is more conducive to the performance ofovertones, making the sound more musical.
Innovative Design 2
The double-duct and complex acoustic tuning structurenot only facilitates the extension of extremely high andlow frequencies but also significantly eliminatesstagnation and enhances the purity of the sound

Wire
BN9 is equipped with two different single crystal copper silver-plated wires.Transparent silver is 3.5 single-ended, and itsadvantage lies in the vocals, especially the sweetness of femalevoices. Gray is 4.4 balanced, and the sound orientation is quiet andstable,Suitable for instruments, classical music, etc.
Cables and interfaces
Thick 2-core, low-impedance, single-crystal copper silver-platedaudiophile upgrade cable. With a diameter of 2.2mm, each coreconsists of 100 wires and is made of high-purity single-crystalcopper silver-plated material, giving it a soft and substantial feel.
The pin standard is 0.78 two pin interface
Equipment Pairing:30 ohm impedance, 115dB, seems easy to drive.Even with a phone and a small power adapter, you can get decentsound, and using an earphone amplifier is even better. High gainisn't necessary with a lossless player or sound card decoder.In-Ear Tips: The BN9 comes with only basic silicone tips. Becauseindividual eartip preferences vary greatly, there are many high-endtips on the market, such as bullet tips for bass, bowl tips for mid- andhigh-frequency performance, and sponge tips for bass absorption.Please choose according to your preferences.

Specifications
Brand:Hessian
Product Name:Flagship dynamic in-ear HlFlheadphones with rear-mounted drivers and dual-duct design
Headphone Model: Moon Night 7(BN9)
Driver:10mm high-resolutiongraphene dynamic driver
Impedance:30Ω
Frequency Response:8-40kHz
Sensitivity:115dB/Vrms @ 1kHZTHD:<1% @ 1kHZ
Cable Standard:0.78
ARated Input Voltage: 1.3VCompliant Standard:GB/T14471-2013