Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
Deep discounts on car installation gear
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Trusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
Diamond Audio D615D2
D6 Series 15" subwoofer with dual 2-ohm voice coils
Our take on the Diamond Audio D615D2 by Crutchfield's Jo Greene
Powerful D6 Series 15" sub
You'll spend a Saturday afternoon giving your ride the old buff 'n shine — now it's time to clean up your bass response for a more polished sound. Diamond Audio designed D6 Series subwoofers for clean, cool-running performance so you'll hear potent, refined bass that makes for a very entertaining ride, even if it's just across town.
Heat dissipating alloy woofer
This 15" D6 sub features a rigid, lightweight anodized alloy cone held in place by a sturdy, special-design rubber surround. Diamond Audio uses an aluminum-finned radial heatsink to pull damaging heat away from the motor assembly — the alloy cone and aluminum dust cap also direct heat upwards and outwards, so it doesn't end up trapped in your subwoofer enclosure.
High power handling from 3" voice coils
Hefty 3" aluminum-coated copper voice coils dissipate even more heat for exceptional power handling. The dual 2-ohm voice coils give you more options for wiring the sub into your system, and make it easy to add a second D6 sub later on.
Non-resonant aluminum basket
The cast aluminum basket gives this sub the stable foundation it needs to deliver faithful, uncolored bass for the lifetime of your system. Diamond Audio's proprietary O2 casting technique creates a denser, less porous basket that virtually eliminates unwanted resonance, so your favorite music sounds just as the artist intended.
What's in the Box:
- 15" Dual 2-ohm voice coil subwoofer
- Rubber trim-ring (installed)
- Eight 1-1/8" Self-tapping screws
- Installation manual
- Cardboard template
- 15" subwoofer with dual 2-ohm voice coils
- anodized alloy cone
- ethylene propylene diene monomer (EPDM) rubber surround
- cast aluminum basket
- power range: 75-750 watts RMS (1500 watts peak power)
- frequency response: 20-250 Hz
- sensitivity: 87 dB
- top-mount depth: 7-15/16"
- sealed box volume: 2.25 cubic feet
- ported box volume: 3.0 cubic feet
- warranty: 1 year
- Our 60-day money-back guarantee
Features and Specs
|Impedance||1 ohm or 4 ohms|
|Cone Material||Anodized Alloy|
|Surround Material||EPDM Rubber|
|Ideal Sealed Box Volume (cubic feet)||2.25|
|Ideal Ported Box Volume (cubic feet)||3|
|Port diameter (inches)||4|
|Port length (inches)||11|
|Dual Voice Coil||Yes|
87 dB at 1 watt
|Frequency Response||20 - 250 Hz|
|RMS Power Range (Watts)||75-750|
|Peak Power Handling (Watts)||1500|
|Top Mount Depth (inches)||7 15/16|
|Bottom Mount Depth (inches)||N/A|
|Cutout Diameter or Length (inches)||13 7/8|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
Dual 2Ω Voice Coils: The D6 15D2 features dual 2Ω voice coils. When the voice coils are wired in parallel, the woofer presents a 1Ω load; when wired in series, the woofer presents a 4Ω load.
Cone: The anodized alloy woofer cone is both rigid and light weight. The aluminum dust cap adds to the woofer's rigidity and helps draw heat away from the voice coil.
EPDM Surround: The EPDM (Ethylene Propylene Diene Monomer) Rubber surround offers high cone excursion and long term durability.
Dual Mirror Image Flat Spiders: Dual-opposing spiders offer superior mechanical stability during high excursions, while maintaining linear travel.
Cast Aluminum Basket: The cast aluminum basket is rigid and non-resonant. Additionally, the large aluminum mass helps reduce the voice coil former temperature, thereby increasing power handling.
Spring-Post Terminals: The spring-post terminals will accept pin connectors, single banana plugs, and bare wire up to 8-gauge.
Concealing Ring: The included rubber trim-ring provides a mounting gasket and covers the mounting screws, giving the subwoofer a finished look.
Sealed Enclosure: The recommended sealed box volume is 2.25 cubic feet.
Vented Enclosure: The recommended vented box volume is 3.0 cubic feet with a 4" diameter, 11" long port; resulting in a tuning frequency of 30 Hz. A 30 Hz sub-sonic filter is recommended for vented enclosures.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.