MT6MR400CF-NDY-4 SLIM
- 6.5″ Midrange – 4 Ohm
- Waterproof Carbon Fiber
- 97 dB – 400 Watts
$118.92
In stock
PRICE FOR SINGLE UNIT
Features
Features
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
GENERAL SPECIFICATIONS
| 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 | |

THIELE-SMALL PARAMETERS
| 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
EXTRA INFO
| 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) |
Repair Parts
Recone Kit for MT6MR400CF-NDY-4 SLIM
16 reviews for MT6MR400CF-NDY-4 SLIM
| 5 star | 87% | |
| 4 star | 12% | |
| 3 star | 0% | |
| 2 star | 0% | |
| 1 star | 0% |
Customer Images




MT6MR400CF-NDY-4 SLIM
Q & A
MT6MR400CF-NDY-4 SLIM













The MT6MR400CF-NDY-4 is a slim, lightweight 6.5 that solves one of the biggest problems in custom installs: space. With its shallow mounting depth and neodymium motor, it fits where normal mids won’t without adding weight or stressing panels.
Performance wise, it hits way above its size. The carbon fiber cone gives it a clean, detailed midrange, and the frequency response stretches high enough that vocals, instruments, and upper mids come through smooth and crisp. It’s efficient, loud, and stays clean even when you lean on it.
If you need a compact mid that delivers real clarity and range without the bulk, this one’s a killer choice. Take a look at my video showing it compared to the 6MR500CF-NDY-4.
Really need to get these if you thinking about getting some.
Sounds a 100% better than the speakers that were in it. Now I can hear the music at Hwy. speeds and the bike has loud exhaust
Running 4 on my cross country pack a big punch!!!!
Speakers sound great. I replaced the factory Harley Davidson speakers with these and they are a lot louder and clear without an amp or DSP. I will be adding both soon so I’m looking forward to seeing what they sound like with max power pushing them.
Put 4 of these in my Polaris RZR TurboR and they freaking sound amazing! So loud, but crystal clear through a DSP, perfectly tuned with an oscilloscope and RTA on 150w each. THEY ARE KILLER!
Very loud and clear light weight. Fits Harley front fairing rear tour pack speakers.
I’m a true prv person now. Doing my bike all prv , no more ds18 for me. Loud and clear as all out
These speakers are amazingly clear and loud. I installed 2 of these 6.5’s and 2 PRV 6×9’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.
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