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6" Mid Range Bullet Slim Loudspeaker

6MR250B-4 SLIM

(32 customer reviews)
In stock
  • 6″ Mid Range – 4 Ohms
  • Shallow Mount
  • 93.5 dB – 250 Watts


In stock


SKU: 6MR250B-4 SLIM Categories: , , Tags: , ,


The MR SLIM series was designed as PRO Audio On Wheels solution for shallow doors, featuring an Aluminum Phase Plug (Bullet). This mid is built like a professional mid range loudspeaker, but it has been designed for use in the mobile audio market, as we called it Pro Audio On Wheels®!

By combining elements from PRO Audio and Car Audio we have developed a NEW type of high efficient mid range that is able to give high levels of output from stock speaker location in your car.



  • Slim Design – Perfect for door stock location
  • Sound Quality without Cutting up interior Panels
  • Endurance at Loudest Volumes
  • Vented Air pole piece for heat dissipation
  • Center phase plug for even sound distribution
  • 4 Ohms Impedance
  • Also available in 8″- 8MR400B-4 SLIM

The “bullet” phase plug is made from pure aluminum acting as a radiator cooling system for the voice coil and machined to perfection for even sound dissipation. Beyond good looks, this cone is extremely light, providing excellent damping to keep an incredibly natural yet accurate sound.

Also featuring a cloth M-roll surround helping resonance to be kept under control making for an easy transition to a super tweeter.

6MR250B-4 SLIM

The suspension design of this mid range features the single layer spider – which connects to the coil former with premium stitched lead wires, all being driven by a copper-clad aluminum wire voice coil providing high efficiency and excellent power handling.

You can expect outstanding sound stage quality and realistic sound reproduction for a great value.

Built for compact spaces and able to handle 250 watts of continuous power. Its slim design makes this the perfect car audio door speaker, allowing it to be utilized in endless ways.

Loud and clear vocals all within 2.14″ of mounting depth without sacrifice quality and performance.

Technical Details


Nominal Diameter 6″ (152 mm)
Nominal impedance 4 Ohms
Rated AES Power Handling (RMS) 125 Watts
Program Power 250 Watts
Sensitivity 2.83V at 1m 93.5 dB
Recommended Hi Pass Crossover** **For Full Power Handling 145 Hz** **12db Per Octave Crossover
Frequency Response at -10dB 145 – 8,000 Hz
Voice Coil Diameter 1.5″ (38 mm)
Voice Coil Wire CCAW
Voice Coil Winding Depth 9.5 mm
Former Material Kapton
Magnetic Gap Depth 6.0 mm
Frame Material Stamped Steel


Equivalent Volume Vas 4.0 l
Excursion (mathematical)*** Xmax 3.25 mm
Free Air Resonance Fs 142.9  Hz
Mechanical Factor Qms 28.73
Electrical Factor Qes 0.85
Total Factor Qts 0.82
Cone Area Sd 143 cm²
Mechanical Mass Mms 8.89 g
Bl Factor Bl 5.82 Tm
Dc Resistance Re 3.6 Ohms
Inductance Le 0.135 mH at 1 kHz
Mechanical Mass Without Air Mmd 7.92 g
Mechanical Compliance Cms 0.139 mm/N

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


Overall Diameter 6.50″ (165 mm)
Front Mount Baffle Cutout 5.67″ (144 mm)
Mounting Depth 2.14″ (54.5 mm)
Overall Depth 2.38″ (60.5 mm)
Net Weight 3.53 Lbs (1.60 kg) unit
Shipping Weight 3.96 Lbs (1.80 kg)
Carton Dimensions W x L x H 6.89″ x 6.89″ x 2.95″ (175 x 175 x 75 mm)

Customer questions & answers

  1. 0 votes
    Q How many speakers come in one unit ? Is it 37.99 for just one speaker ? Does that mean i have to order four units or just two
    Asked by Alan Cruz on August 7, 2020 10:37 pm

    One unit is one speaker. They are sold individually. 

Send me a notification for each new answer.

32 reviews for 6MR250B-4 SLIM

  1. Roger Ruiz

    Definitely field my
    expectations on sound

  2. ADAM D.

  3. Alex Rivera

    These are the best speakers I have ever installed in my vehicle. I took out my Alpine type R 6.5 and replaced them with these. I have to say the sound in night and day.

  4. Jennifer F.

    Very good speakers

  5. Jian Medina

    Clear well detailed voice and a meaty mid bass response, this are really loud, you will definitely need tweeters with this speakers to get the best sound. As for my order it was shipped and delivered really fast.

  6. Jian Medina

    Great service and great product as expected, im a new and permanent customer felt in love with the quality of the brand

  7. Dean C.

  8. luis T.

    Best mids for thin door panels . Clear sound and loud.

  9. Arlue Patterson

  10. bryan Tournier

  11. LaTicia Smith

  12. Anthony W.


    Great – A++

  14. Joseph DeLitizia

  15. Tracy Shoaf

  16. eliel o.

    amazing speakers and amazing quality at such a low price, totally worth it!

  17. Roberto L.

    Very good audio

  18. Rob Scrimpsher

    Bought these to upgrade the factory speakers in my car.absolutely love the sound of these speakers

  19. Juan

    Crisp and clear

  20. Fernando C.

  21. robin V.

  22. Sidney C.

  23. Calvin Davis

    Crystal clear

  24. Victor G.

  25. Rafael Antongiorgi

    Good speaker 👍👍

  26. David Poole

    Exactly what I wanted fast shipping great quality

  27. Anonymous

  28. Jeff P.

    Great speaker

  29. Luis Quinones

  30. Chad D.

    Absolutely amazing sound for a shallow mount and fit my needs perfectly for the front doors of my 06 Vibe.

  31. CD

    These things are unreal. I needed a shallow mount option to replace a set of Alpine S series components and these things blew me away.

  32. Rafael Antongiorgi

    Good speaker 👍👍👍

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