BGVP NS9 – Review

Specifications

 For the nitpickers and nerdy ones here, I’m giving the specs and technical sheets. For all the others, you can just go to the next page to see how the DM8 performs.

Knowles + Sonion Drivers + Liquid silicone woofer

At the heart of the BGVP NS9, we find no less than seven drivers from Knowles and Sonion.

The NS9 gets the same four-way crossover found in the BM8, dividing the sound into four different channels and putting one, or two, drivers for each layer:

• ultra-high-range, the brand chose a dual-chamber Sonion E50DT005, which offers wideband response up to 18kHz to “enhance sound extension and make it more transparent and natural”
• high-range, a single Knowles RAF-3287 driver. One, we haven’t seen in many modern IEM, but found in the Simgot EM2, tuned to offer “crisp but smooth upper mids”
• mid-range, two Sonion FDK-60718, specially tuned for BGVP, made of a combination of the 30017 and 60318 units from the brand. The promise? Lower harmonic distortion and better vocals density to give us a more attractive midrange
• low-range, last but not least, for the bass, the brand uses a whole new composite diaphragm coaxial dual dynamic driver (!) Specifically developed for the NS9n this new driver blends a new N5 magnetic circuit and titanium-plated diaphragm + silicone ones to reach sub-lows like 10-20Hz

What’s even more interesting, is how the NS9 fits all those drivers. Like many IEMs now, BGVP 3D-printed its own bracket, where every drivers can just be plugged, instead of having someone painstakingly arrange each one of them.

Thanks to that, the BGP NS9 gets the same three-channel crossover usually found in much more expensive gear, with independent output and specific acoustic damping, for a fraction of the initial cost. A box in a box design, both clever and intriguing.

Of course, packing up more drivers doesn’t automatically make and IEM better than the older version. It helps, but it’s a mean, not an end. 

Sensitivity / Hiss

Impedance is low, sensitivity is high so once you add those specs, you end up with a mildly sensitive IEM. It can be powered from a smartphone but shine once paired with a good DAC.

There is no hiss, even with badly grounded sources, or nothing that I could hear.

On that good note, let’s check the specs.

Full specs

• Type: hybrid IEM
• Style: Balanced drivers x7 + dual woofer dynamic driver 
• Drivers: Sonion E50DT + Knowles RAF-32873 + Sonion FDK-60718 + liqui silicone coaxial dual dynamic driver
• Socket: MMCX
• Shell: five-axis CNC acoustic cavity + 3D printed inner structure
• Frequency response range: 10Hz – 40kHz
• Impedance: 20 ohms
• Sensitivity: 107dB/mW
• Distortion: <0.5%
• Price: $169

The review continues on Page four, after the click HERE or by using the jump below.

Page 1: about the brand

Page 2: Design, bundle, comfort

Page 4: Sound performances, conclusion