Bold North Audio MS10-W 7" - 8 Ohm Square Replacement Woofer for Yamaha NS-10™ Studio Monitor

SKU: 343-001

Canadian Dollar Price:
Sale price$259.97
In stock (9 units)



Bold North Audio MS10-W - The First Accurate Sonic Match to the Iconic Yamaha Woofer 

The Yamaha™NS-10™near-field monitor loudspeaker is an icon in the recording industry. It is the de-facto standard in both professional and home recording studios worldwide. Unfortunately, the product has been discontinued and Yamaha-made replacement parts are no longer available.

MISCO has answered the need with the MS10-W direct replacement woofer driver for NS-10 loudspeakers. The MS10-W exactly matches the sound of the Yamaha woofer more accurately than any manufacturer has ever done.

Using state of the art laser-based measurement tools MISCO engineers were able to pinpoint those factors that make an NS-10 driver sound like it does, and choose the materials and tuning needed to match the iconic NS10 sound. 

  • Seamed paper cone for accurate reproduction of the NS10 woofer timbre 
  • Klippel Verified - designed and 100% tested with state-of-the-art Klippel measurement tools
  • Edge-wound copper voice coil
  • 90dB sensitivity
  • Black powder coated steel basket

The MS10-W is packaged and sold individually, but MISCO highly recommends that NS-10™ owners replace both woofers at the same time. Original drivers may "work" but their suspensions have likely fatigued over time and no longer perform as they should. For the best imaging and sound staging it is essential that left and right speakers be as closely matched as possible. Replacing both mid-woofers with MS10-Ws, in essence, brings the speaker system back to the sound of a new pair of NS-10s (assuming the tweeters and crossovers are working correctly). Purchase TWO for best results!


On-axis frequency response measured with Klippel Near Field Scanner: Yamaha NS-10 black, BNA MS10-W blue, competitor “A” red. Click image to see more proof in the MS10-W Technical Brief.

Joe Zook Bold North NS-10 promo.jpeg

“Finally, someone did it! The NS-10 woofer has been resurrected! Thanks Bold North for your commitment to replicating as opposed to ‘improving.’ I have total confidence in my new MS-10s!”

Joe Zook
Mix Engineer, Los Angeles

Kevin Szymanski Mix Engineer.JPG.jpeg

“This isn’t just a white speaker, resembling the NS-10 woofer, it is exactly like a NS-10 woofer. I couldn’t be more pleased with the result!”

Kevin Szymanski
Producer, Mix Engineer - Nashville


“[Bold North Audio’s] dedication to faithfully sticking to the classic design that worked for years results in a replacement component that I trust and continue to use with my favorite speakers…”

Ross Newbauer
Mix Engineer, Los Angeles




Model # MS10-W
Speaker Type Woofer
Shape of Speaker Square
Application Musical Instruments, Pro Sound
Rated impedance (Ω) 8
DC resistance (Re) (Ω) 6.3
Rated Power IEC268-5 (W) 30 Watts
Power, Continuous (W) 30
Power, Program (W) 60
Power, Peak (W) 120
Frequency range (Hz) 54 - 5,200
Sensitivity (dB SPL) ¹ 90.4 @ 1watt / 1 meter
Resonant Frequency (Fs) (Hz) 54
Nominal Impedance (Z) (Ω) 8
Voice Coil Inductance (Le) (mH) 0.62
Mechanical Q factor (Qms) 10.25
Electrical Q Factor (Qes) 0.60
Total Q factor (Qts) 0.57
Moving mass (Mms) (gm) 12.81
Suspension Compliance (Cms) (mm/N) 0.694
Mechanical Resistance (Rms) (kg/s) 0.421
Surface area of diaphragm (Sd) (cm²) 168.6
Compliance equivalent volume (Vas) (L) 27.92
Maximum linear excursion (Xmax) (mm) 3.85
Coil winding height (mm) 12.7
Magnetic Gap Height (mm) 5.0
Motor Force Factor (BL) (T•M) 6.74
Motive Force (BL²/Re) (T•m²)/Ω) 7.18
Efficiency (η₀) (%) 0.68
Efficiency Bandwidth Product (EBP) (Fs/Qes) 89.0
Basket type Stamped Steel with black powder coat
Terminal size 2.8 mm (0.110")
Voice coil wire material Copper, single layer (Edgewound)
Voice coil former material Paper
Magnet Material Ferrite
Cone body material White seamed paper
Cone surround material Treated Fabric
Dust cap material White paper

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