SKU: 72340852303

Stereo Integrity M3 Carbon - Midrange Set

Sale price$180.00 Regular price$200.00
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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

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Description

Stereo Integrity M3 Carbon - Midrange SetOur M3 Carbon 3. 5 loudspeaker is a no compromise wideband solution for use in any high end audio system. Smooth midrange fluidity, broad bandwidth, and low inductance are the key design elements on our M3 Carbon loudspeaker. Extensive Finite Element Modeling along with critical analysis data from Klippel USA was used to fine tune the driver into what you see before you. The M3 Carbon has a Carbon Fiber cone and dust cap for lightweight moving mass to

Our M3 Carbon 3.5″ loudspeaker is a no-compromise wideband solution for use in any high-end audio system. Smooth midrange fluidity, broad bandwidth, and low inductance are the key design elements on our M3 Carbon loudspeaker. Extensive Finite Element Modeling along with critical analysis data from Klippel USA was used to fine-tune the driver into what you see before you. The M3 Carbon has a Carbon Fiber cone and dust cap for lightweight moving mass to keep sensitivity as high as possible while providing exceptional cone stiffness. The Carbon Fiber cone is mated to a specific custom tooled synthetic copolymer surround which aids in smooth midrange and excellent durability. The dominant suspension damping force is provided by a Nonex spider between the spiral cut aluminum voice coil former and cast aluminum frame. Inside the motor cup lies a high-strength shielded N45 neodymium motor structure providing high motor force across a single gap motor structure. Inductance is kept low to increase the high-frequency extension up to 20,000 Hz which can negate the need for a tweeter when used on-axis.

While we call the M3 Carbon our midrange it is actually a wideband loudspeaker capable of playing from 125 Hz up to 20,000 Hz. We recommend a highpass crossover point equal to or greater than 300 Hz with a 24 dB/octave slope.

Key Features:

Carbon Fiber cone and dust cap
Synthetic copolymer surround
Cast basket
Copper voice coil
Neo cup motor
Designed and optimized using FEA
Frequency response from 125 Hz to 20,000 Hz

49.5 mm Mounting depth
72.5 mm Cutout
94.4 mm OD

Component Speakers Specifications

Quick Info

Weight 1 lbs
Dimensions (OD) 94.4 mm
Dimensions (Cutout) 72.5 mm
Mounting Depth 49.5 mm
RMS 100 watts
Impedance 4 Ohms

Thiele-Small Parameters

Re 3.4 Ohms
Fs 126 Hz
Qes 1.14 –
Qms 3.14 –
Qts 0.85 –
Le 0.03 mH
Sd 5.13 square inches
Vas 0.62 Liters
BL 3.08 Tesla Meters
Mms 4 grams
Cms 75.1 µM/N
Xmax 3 mm one-way 70% BL
Xmech 5 mm one-way
SPL 86 dB

Materials

Surround Material Rubber –
Cone Material Carbon Fiber –
Voice Coil Material Copper –
Magnet Material Neodymium –

Performance & Compliance

Frequency Response Minimum 150 Hz
Frequency Response Maximum 20,000 Hz
Sensitivity 86 dB
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 72340852303

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4.7 ★★★★★
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Verified Purchase
Michael Arnhold
Charlottesville, US
★★★★★ 5
Very comfortable Slippers. Great buy!
Size: 12-13 Women/10.5-11.5 Men, Color: Charcoal
I bought these to replace a pair of slippers that I have had for years that are very similar to the slippers I bought, but I had worn a hole in the leather on mine, so I had to find something new and similar. These slippers are worth the money they are very comfortable, and I am sure they will last for years. They are a little tight around the ankle cuff but they are still new and I am sure they will wear in a little more when I start wearing them more.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2025
J
Verified Purchase
Jenn
Omaha, US
★★★★★ 3
Great slippers but disappointing quality.
Size: 7.5-8.5 Women/6-7 Men, Color: Ash, Size: 7.5-8.5 Women/6-7 Men, Color: Ash
Extremely comfortable, attractive slippers but the stitching came loose on both leather trim areas almost immediately. I tried to sew/glue down the stitching (as seen in photo) but it kept unraveling. Disappointing as these slippers are great in every other way (though they do run a bit big...I wear a 9 but ended up with a 7.5-8.5 which fits with a bit of room to spare even with thick socks). I just hope they hold up after my latest attempt to stop the thread from pulling out any more as I do really love wearing them. Perhaps I just got a bum pair?
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2024
L
Verified Purchase
Liza Jane
Phoenix, US
★★★★★ 5
Quality and comfort
Size: 10.5-11.5 Women/9-10 Men, Color: Black
Comfortable and fit well. I got these to replace a very old pair that finally wore out! Warmth is medium (I wear puffer booties for when it's really cold). Quality on these is great!
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Reviewed in the United States on March 9, 2026
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Verified Purchase
V M T R
Houston, US
★★★★★ 5
Can't go wrong with Acorn for as long as they last!
Size: 12-13 Women/10.5-11.5 Men, Color: Charcoal
Acorn is just a great company all around. I had bought my husband these slippers over 20 years ago. They are still in great shape although the sole has worn in some places. But nothing's coming apart! However, I decided to replace them for him. His foot is 10.5 and they are a little hard to get on right away-of course, after over 20 years of having "worn in" the original pair, anything would feel tight. So I'm not holding this against them. They will relax with use. The only difference is that the original sole was black and these are tan. I think I would prefer the black, but since it's only being worn in the house, no big deal. My husband has really cold feet and these slippers never fail to warm his feet right up! He said they feel really soft to walk in and like the cushioning. They're not too heavy and fit him great! I have Acorn slippers myself that I've worn every single day in the house and outside to the mailbox too. They last.
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Reviewed in the United States on April 11, 2026
M
Verified Purchase
Michael
Cuba, US
★★★★★ 4
Very warm.
Size: 13.5-14.5 Women/12-13 Men, Color: Navy Blue
Very warm and comfortable. A little difficult to put on with the collared top.
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Reviewed in the United States on January 19, 2026

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