Diamond DMD42

Diamond Audio DMD42 is a pair of compact, high-performance 4-inch 2-way coaxial speakers from Diamond Audio’s value-engineered DMD Series, designed to deliver crisp, clear audio upgrades for tight factory speaker locations.

Product Overview

• Brand: Diamond Audio

• Product Line: DMD Series (Entry-Level / OEM Upgrade)

• Part Number / SKU: DMD42

• Speaker Size: 4 inches (110 mm)

• Configuration: 2-Way Full-Range Coaxial

• Sold As: Pair (Left and Right)

Key Specifications & Performance Ratings

• Power Handling:

  • RMS Power: 30 Watts each (60 Watts per pair)

  • Peak Power: 60 Watts each (120 Watts per pair)

• Nominal Impedance: 4 Ohms ($\Omega$)

• Frequency Response: 70 Hz – 20 kHz (or ~83 Hz depending on vehicle tuning variant)

• Sensitivity: 84 dB – 88 dB (1W/1m)

• Mounting Depth: 1.82 inches (46 mm)

• Mounting Cutout Diameter: 3.88 inches (98.6 mm)

Key Features & Build Specifications

1. Reinforced Polypropylene Cone:

   • Engineered with a sturdy, moisture-resistant injection-molded polypropylene cone featuring internal dampening to ensure accurate midrange reproduction and long-term durability.

2. PEI / Silk Dome Tweeter:

   • Equipped with an integrated co-axially mounted high-frequency tweeter (utilizing ferrofluid cooling in select revisions) to deliver smooth, detailed treble without harshness.

3. Rigid Basket & Motor Structure:

   • Built with a tough composite ABS or stamped steel frame designed to resist flexing and absorb vehicle vibrations.

4. Factory-Friendly Integration:

   • With a shallow mounting depth of under 2 inches, these speakers are optimized to drop cleanly into tight factory dashboard slots, door panels, or rear decks running on stock head-unit power or small aftermarket amplifiers.

Recommended Applications

• OEM Speaker Replacement: Ideal for upgrading tired or blown factory 4-inch dash speakers or small door/rear-deck speakers in cars, trucks, and custom builds where space is restricted.