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MB Quart MBQ-DK2-110 Discus 4" 2-Way Coaxial Car Speakers
A 4" 2-way coaxial car speaker from the MB Quart Discus series, the MBQ-DK2-110 delivers aluminium inverted dome tweeter performance, lightweight polypropylene cone construction, butyl rubber surround, and a pure copper voice coil on a Kapton former at 40W RMS and 80W peak into 4 ohms.
Product Overview
The MB Quart MBQ-DK2-110 is a 4" 2-way coaxial car speaker from the Discus series, designed as a direct upgrade for vehicles with factory 4" speaker positions. Covering a frequency response of 55Hz to 19kHz at 88dB sensitivity and 4 ohms impedance, the DK2-110 handles 40W RMS and 80W peak. The aluminium inverted dome tweeter delivers high-frequency detail with increased reliability compared to soft dome alternatives, while the lightweight thermal-formed polypropylene cone provides fast midrange response. A butyl rubber surround delivers durable, long-term cone excursion and deeper mid-bass impact, with a high-temperature adhesive cone and surround connection ensuring separation does not occur under high power or extreme temperature conditions.
The pure copper voice coil on a Kapton former creates a strong magnetic field, with the Kapton material providing lightweight and efficient heat dissipation. An over-coil cooling system allows air exchange over the voice coil through the spider for thermal management during sustained use. The natural fibre spider with infused epoxy provides flexibility during excursion with structural strength during manufacturing. A 6dB internal crossover is integrated into the speaker design for smooth midrange to tweeter frequency transitions. Heavy gauge progressive-die stamped steel frames provide structural rigidity, and the ferrite magnet motor is sized to fit a wide range of vehicle applications. Tinsel lead connections support spade connectors or direct solder for reliable signal and power delivery.
Features & Benefits
Aluminium Inverted Dome Tweeter: The aluminium inverted dome tweeter delivers detailed high-frequency reproduction up to 19kHz with increased reliability over soft dome alternatives, providing clear and extended treble response within the coaxial assembly.
Lightweight Thermal-Formed Polypropylene Cone: The cone is manufactured from lightweight thermal-formed polypropylene, enabling faster midrange response and accurate pistonic motion across the DK2-110's operating frequency range.
Butyl Rubber Surround with High-Temperature Adhesive Bond: The butyl rubber surround provides long-term durability, controlled cone excursion, and deeper mid-bass impact compared to foam surrounds. The cone and surround connection uses a high-temperature adhesive to prevent separation during high power use or in extreme weather conditions.
Pure Copper Voice Coil on Kapton Former: The pure copper voice coil creates a strong magnetic field with a thin extrusion profile. The Kapton voice coil former is lightweight and efficiently dissipates heat during sustained power handling.
Over-Coil Cooling System: The over-coil cooling system allows air exchange over the voice coil through the spider, managing thermal buildup during high-power or extended playback sessions.
Natural Fibre Spider with Infused Epoxy: The spider uses natural fibre for flexibility during cone excursion, with infused epoxy providing the structural strength required during the manufacturing process and long-term operation.
6dB Internal Crossover: A 6dB internal crossover is integrated into the speaker design, managing frequency distribution between the woofer and aluminium inverted dome tweeter for smooth midrange to tweeter transitions without requiring external crossover components.
Heavy Gauge Progressive-Die Stamped Steel Frame: The speaker frame is constructed from heavy gauge steel using a progressive-die stamping process, providing ultimate rigidity for the driver assembly during operation.
Ferrite Magnet Motor: The ferrite magnet motor creates a strong magnetic field in a compact form factor, sized to fit a wide range of vehicle door and panel applications where magnet clearance may be restricted.
Spade or Solder Connection Options: The DK2-110 supports both spade connector terminations and direct solder connections via highly conductive, flexible tinsel leads for reliable signal and power delivery across installation methods.
Technical Specs
| Specification | Detail |
|---|---|
| SKU | MBQ-DK2-110 |
| Brand | MB Quart |
| Series | Discus |
| Colour | Black |
| Speaker Type | 2-Way Coaxial |
| Speaker Size | 4" |
| Power Handling - RMS | 40W |
| Power Handling - Peak | 80W |
| Impedance | 4 Ohm |
| Frequency Response | 55Hz - 19kHz |
| Sensitivity | 88dB |
| Crossover Slope | 12dB/Octave |
| Internal Crossover | 6dB |
| Mounting Diameter / Cut-Out | 3.69" |
| Outside Diameter | 4.0" |
| Mounting Depth | 2.0" |
| Tweeter | Aluminium Inverted Dome |
| Cone Material | Lightweight Thermal-Formed Polypropylene |
| Surround Material | Butyl Rubber |
| Voice Coil Material | Pure Copper |
| Voice Coil Former | Kapton |
| Spider | Natural Fibre with Infused Epoxy |
| Cooling System | Over-Coil Cooling |
| Frame | Heavy Gauge Progressive-Die Stamped Steel |
| Magnet Type | Ferrite |
| Connectors | Spade or Direct Solder (Tinsel Leads) |
| Warranty | 2 Years |
Compatible With
The MBQ-DK2-110 is designed as a direct upgrade for vehicles with factory 4" speaker positions. The 3.69" mounting cut-out diameter and 2.0" mounting depth suit the standard 4" speaker opening found across a range of vehicle door and panel locations. At 4 ohms impedance and 40W RMS, the DK2-110 is compatible with most aftermarket head units and car amplifiers. Verify mounting cut-out diameter and depth clearance against your specific vehicle before installation.
Frequently Asked Questions
What makes the aluminium inverted dome tweeter in the MBQ-DK2-110 different from a standard dome tweeter?
The aluminium inverted dome design uses an aluminium diaphragm in an inverted profile, providing increased stiffness and reduced breakup compared to soft dome alternatives, delivering detailed high-frequency reproduction with greater long-term reliability and resistance to damage during high-power use.
Does the MBQ-DK2-110 require an external crossover?
No. The DK2-110 includes an integrated 6dB internal crossover that manages frequency distribution between the woofer and aluminium inverted dome tweeter, allowing straightforward installation without external crossover components.
Can the MBQ-DK2-110 be driven directly from a head unit without an amplifier?
Yes. With 88dB sensitivity and a 40W RMS rating at 4 ohms, the DK2-110 is compatible with head unit outputs typically in the 18-50W per channel range. For higher output, an external amplifier matched to the speaker's 40W RMS and 80W peak ratings at 4 ohms is recommended.
What is the purpose of the over-coil cooling system?
The over-coil cooling system allows air to circulate over the voice coil through the spider during operation, dissipating heat generated by the voice coil during sustained or high-power playback. This thermal management helps maintain performance and extend the lifespan of the voice coil assembly.
What connection types does the MBQ-DK2-110 support?
The DK2-110 supports both spade connector terminations and direct solder connections via the tinsel leads. Both methods provide reliable signal and power delivery; spade connectors allow easier removal during servicing, while direct solder provides the lowest-resistance permanent connection.
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