Ultimate Guide to Dual Subwoofer Setups for Car Audio
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Stereo Integrity
Stereo Integrity M350 Carbon | 3.5 Inch Midrange - Pair
SKU: SI-M350-CARBON
$ 359.99
QUICK SPECS
- Type: 3.5 in carbon fiber dome midrange, sold as a pair
- Power Handling: 100W RMS, 4 ohm
- Mounting Depth: 36 mm, 74 mm cutout
- Recommended Range: 400 Hz to 5,000 Hz
Stereo Integrity M350 Carbon | 3.5 Inch Midrange - Pair
Regular price
$ 359.99
Sale price
$ 359.99
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Stereo Integrity
M350 Carbon
3.5 Inch Carbon Fiber Dome Midrange | Sold as a Pair
Carbon Fiber Dome 2 in Copper Voice Coil 4 mm One-Way Xmax 36 mm Mounting Depth 400 Hz to 5,000 Hz
A Different Approach to a 3.5 Inch Midrange
The M350 Carbon is a completely new 3.5 inch midrange built around an unusual idea: a full 2 inch diameter voice coil with the spider mounted inside the voice coil former. Putting the spider inside the coil gives it room for smooth, ample travel, and Stereo Integrity says the large coil increases thermal power handling dramatically compared with a conventional 3.5 inch design.
It is also shallow. The M350 mounts in 36 mm, 13.5 mm less than the M3 Carbon, which opens up more mounting locations and makes installation easier.
Engineering Highlights
Full Carbon Fiber Dome
The dome is the moving diaphragm, so Stereo Integrity made it from full carbon fiber for its strength to weight ratio. A custom tooled carrier joins the spider to the dome and keeps the coil, spider, dome, and surround in alignment.
Underhung Neodymium Motor
The new underhung neodymium cup motor increases motor strength for higher sensitivity and delivers 4 mm of one-way linear travel at 70 percent Bl, which Stereo Integrity says is 35 percent more than its predecessor.
2 Inch Copper Coil on Kapton
The copper coil is wound on a lightweight Kapton former that eliminates eddy currents, with a copper pole sleeve and a solid aluminum Faraday ring at the magnet.
Tidy Terminal Block
A minimalist cast aluminum frame carries a terminal block with the voice coil leads soldered directly in place for easy speaker connection.
Crossover Recommendation
Stereo Integrity recommends using the M350 Carbon from 400 Hz to 5,000 Hz. The specification sheet lists a frequency response of 400 Hz to 20,000 Hz and a sealed volume of up to 0.25 cubic feet if you build a pod or back chamber.
Upgrading from the M3 Carbon: Stereo Integrity designed the M350 as an easy swap for the M3 Carbon. Its published cutout is 74 mm and outer diameter 94 mm, compared with 72.5 mm and 94.4 mm for the M3 Carbon, so confirm the fit before you cut.
Fitment
Outer diameter: 94 mm. Cutout: 74 mm. Mounting depth: 36 mm. Motor diameter: 74 mm without boot. Mounting holes: 5. Baffle to top of surround: 7 mm. Minimum grille clearance: 4 mm. Sold as a pair.
Authorized Stereo Integrity Dealer
Audio Intensity is an authorized Stereo Integrity dealer, and we build enclosures around their drivers.
Call 931-563-5151 and we will help you plan a front stage around the M350 Carbon.
| Specifications | ||
|---|---|---|
| Model | M350 Carbon | |
| Size | 3.5 in midrange, sold as a pair | |
| Impedance | 4 ohm | |
| Power Handling (RMS) | 100 W | |
| Sensitivity | 88 dB | |
| Diaphragm | Full carbon fiber dome | |
| Surround | Synthetic copolymer | |
| Voice Coil | 50 mm (2 in) copper on a Kapton former | |
| Spider | Mounted inside the voice coil former | |
| Motor | Underhung neodymium cup, copper pole sleeve, aluminum Faraday ring | |
| Frame | Cast aluminum | |
| Terminals | Terminal block with direct voice coil leads | |
| Outer Diameter | 94 mm | |
| Cutout | 74 mm | |
| Mounting Depth | 36 mm | |
| Motor Diameter | 74 mm without boot | |
| Mounting Holes | 5 | |
| Flange Thickness | 3.5 mm | |
| Baffle to Top of Surround | 7 mm | |
| Minimum Grille Clearance | 4 mm | |
| Listed Weight | 1.3 lb | |
| Thiele-Small Parameters | ||
| Parameter | Klippel Large+Cold | Small Signal |
| DC Resistance (Re) | 3.0 ohm | 3.02 ohm |
| Resonant Frequency (Fs) | 102.6 Hz | 128.8 Hz |
| Electrical Q (Qes) | 0.22 | 0.367 |
| Mechanical Q (Qms) | 1.02 | 2.461 |
| Total Q (Qts) | 0.18 | 0.319 |
| Voice Coil Inductance (Le) | 0.11 mH | 0.051 mH |
| Effective Piston Area (Sd) | 4.84 sq in | 4.84 sq in |
| Equivalent Compliance (Vas) | 0.34 L | 0.29 L |
| Force Factor (Bl) | 6.76 Tm | 6.76 Tm |
| Moving Mass (Mms) | 5.10 g | 6.89 g |
| Suspension Compliance (Cms) | 471 um/N | 222 um/N |
| Linear Excursion (Xmax) | 4 mm one-way (70% Bl) | 4 mm one-way (70% Bl) |
| Mechanical Excursion (Xmech) | 9 mm one-way | 6 mm one-way |
| SPL | 88.5 dB | 88.3 dB |
| Response and Enclosure | ||
| Recommended Use | 400 Hz to 5,000 Hz | |
| Frequency Response | 400 Hz to 20,000 Hz | |
| Sealed Volume | Up to 0.25 cu ft | |
| Figures as published by Stereo Integrity. Large+Cold values are Klippel large-signal measurements; small signal values are the conventional set most modeling tools report. | ||
See every Stereo Integrity subwoofer box and enclosure, each cut for a specific Stereo Integrity driver.
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