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  • 6.5″ Midrange – 4 Ohm
  • Waterproof Carbon Fiber
  • 97 dB – 400 Watts


In stock


SKU: MT6MR400CF-NDY-4 SLIM Categories: , Tags: , ,



PRV Audio is proud to present our new MOTO Series (MT), high performance PRO audio line dedicated for motorsports installations, focused on bringing to you the latest innovative materials and components to resist weather conditions and to provide the highest sound reproduction possible.

This midrange loudspeaker established the new benchmark for vocal reproduction for outdoor applications, making it ideal for improving the sound system in your boat, UTV, 4 wheeler, Slingshot or Motorcycle.

Due to the premium materials used in its construction, such as a carbon fiber cone, a high-temperature voice coil, and a strong neodymium magnet motor, this speaker produces its natural sound with remarkably low distortion.

  • Water Resistant Speaker with true PRO audio Midrange Performance
  • Carbon Fiber Cone with Coated Suspension to Handle Outdoor Applications
  • Full Range Sound, its Low inductance Technology extends its frequency response up to 12,000 Hz
  • High Output Speaker for 4 Wheelers, Slingshots, and Motorcycles that mounts in practically every stock location
  • Built for Compact Applications with only 2.22′′ of mounting depth Without Sacrificing Quality or Performance
  • Grill and screws are included. Also available in 8″ – MT8MR400CF-NDY-4 SLIM

Aside from its attractive appearance, this carbon fiber cone is exceptionally light, surprisingly rigid, and provides great damping to keep narrow peaks under control.

Despite its extremely compact design, our technical team was able to achieve precision in the vocal reproduction range, resulting in the famous PRV audio PRO Audio sound.

A special treated surround and flat spider suspend the cone and keep it linear through the limits of excursion with minimal restriction, further improving dynamics and transients.

This midrange features many premium components, one of which is stitched lead wires, which connect the voice coil to the terminals through a single layer spider suspension, all being driven by a copper-clad aluminum wire voice coil providing high efficiency and excellent power handling, complemented by a high strength neodymium motor that immerses the voice coil in a strong magnetic field.

You can expect excellent off-axis and transient response from this water-resistant speaker for a great, controlled sound, making an easy transition to a super tweeter.


Built for loud, clear vocal performance in tight, compact spaces, PRV Audio’s MT6MR400CF-NDY-4 SLIM midrange features a sensitivity of 95 dB (2.00V/1m) and weighs about 1.63 pounds! 4 ohm impedance.

MOTO Series is dedicated to delivering outstanding pro audio performance to your motorsports application.

Everything about this speaker has been designed for reliable and consistent high output levels in a wide frequency bandwidth between 120 and 12,000 Hz, giving you the option of eliminating the need for a super tweeter on your system!

PRV 6.5″ Carbon Fiber Motorcycle Speaker MT6MR400-NDY-4 SLIM Water Resistant Neodymium Midrange 400 Watts / 4 Ohm

Technical Details


Nominal Diameter 6″ (152 mm)
Nominal impedance 4 Ohm
Nominal Power Handling* 200 Watts
Continuous Program Power (RMS)** 400 Watts
Max Peak Power*** 800 Watts
Sensitivity 2.00V at 1m 95 dB
Recommended Hi Pass Crossover *For Full Power Handling 120 Hz* *12db Per Octave Crossover
Frequency Response 120 – 12,000 Hz
Voice Coil Diameter 1.5″ (38 mm)
Voice Coil Wire CCAW
Voice Coil Winding Depth 10.0 mm
Former Material Kapton
Magnetic Gap Depth 5.0 mm
Frame Material Stamped Steel
PRV Audio -MT6MR400CF-NDY-4 SLIM - Graphic
  *Nominal power handling is defined as the maximum RMS power that the speaker can handle in a 2-hour test with a pink noise with 6dB of crest factor and a bandpass filter with 12db/oct tuned in its usable frequency range. **Continuous Program Power (RMS) is the maximum power that the speaker can handle considering a regular musical program using our recommended filters, this power can be used to define the optimum amplifier power to avoid a clean signal without clipping or saturation. ***Max Peak Power is the maximum power operation for the speaker, this power is allowed just for a few fractions of a second, usually found just on the peaks of the music. Keeping this power for a little longer timer will damage the speaker.


Equivalent Volume Vas 3.38 l
Excursion Xmax*** 3.75 mm
Free Air Resonance Fs 138.9 Hz
Mechanical Factor Qms 6.76
Electrical Factor Qes 0.68
Total Factor Qts 0.62
Cone Area Sd 139 cm²
Mechanical Mass Mms 10.47 g
Bl Factor Bl 6.85 Tm
Dc Resistance Re 3.5 Ohm
Inductance Le 0.168 mH at 1 kHz
Mechanical Mass Without Air Mmd 9.55 g
Mechanical Compliance Cms 0.125 mm/N

***Xmax=(Voice coil winding depth-Magnetic Gap depth)/2+ Mgnetic Gap Depth/4

PRV Audio -MT6MR400CF-NDY-4 SLIM - Impedance


Overall Diameter 6.50″ (165 mm)
Front Mount Baffle Cutout 5.65″ (146.6 mm)
Mounting Depth 2.22″ (56.5 mm)
Overall Depth (with grill) 3.22″ (82 mm)
Net Weight 1.63 Lbs (0.73 kg)
Shipping Weight 1.98 Lbs (0.9 kg)
Carton Dimensions W x L x H 8.54″ x 8.11″ x 4.25″ (217 x 206 x 108 mm)
PRV Audio -MT6MR400CF-NDY-4 SLIM - Loudspeaker6CX380-4-SLIM
PRV Audio -MT6MR400CF-NDY-4 SLIM - Grill
WARNING: Cancer and Reproductive Harm – our Return Policy.

Customer Reviews

Based on 11 reviews
Larry Cissna
Bad Azz Speakers

These speakers are amazingly clear and loud. I installed 2 of these 6.5's and 2 PRV 6x9's with a 1000W PRV amp in my Road Glide. It's crazy how loud and clear my music is at 80mph on the highway. I would definitely recommend these speakers or any PRV product. They are top quality.

Fantastic all around midrange!

I am running 22 of these bad boys on 2 SQ3500’s in my 2022 Jeep Gladiator and WOW what an amazing outcome! Mid-bass is snappy, vocals are smooth, volume is there! Simply blown away with the performance of these speakers!

The CF come is very high quality as well! They look stunning and sound even better. Super pleased!

Ainie Smith
Great fit

If your looking for drop in fit for your harley no mods this is it i put this in my tour pack pods no spacers to replace previous set and there loud thinkingof using these i the lids also

jake hancock
Extremely Loud!!!!


Jarod Deline

Very good speaker