Alpine R2-W8D4 Next-Gen 8" R-Series Subwoofer Dual 4-Ohm with KTE-8G.3 Grill

Included in this kit

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This bundle includes 1x Alpine KTE-8G.3 Grille for 8" Type-R and Type-S subwoofers, and 1x Alpine R2-W8D4 8" R-Series "R2" Subwoofer, Dual 4-Ohm, 350 Watt RMS.

1x Alpine KTE-8G.3 Grille for 8" Type-R and Type-S subwoofers - (KTE-8G.3)

Protect your subwoofer with a sleek and durable grille for your Alpine subwoofer.

SLEEK FINISH
Not only does the KTE-8G.3 offer added protection to your subwoofer, but the matte black finish also provides a sleek, professional look that will elevate the cosmetic appearance of your subwoofer. An Alpine logo badge gives this protective mesh grille a premium finished look.

DURABLE CONSTRUCTION MATERIAL
Made from the sturdiest materials, the KTE-8G.3 protects your subwoofer with a strong, metal mesh grille that has a powder-coated finish for extra protection.

EASY INSTALLATION
The KTE-8G.3 is designed for Alpine's R2-W8D4 and R2-W8D2 8" subwoofers and is easy to install with Alpine's twist-lock EZ change grille system. Just remove the subwoofer's trim ring, put the grille in place, and replace the trim ring.

FEATURES
8” Subwoofer Grille Kit
Black metal mesh grille
Fits the R2-W8D4 and R2-W8D2

What's in the Box:
Black metal mesh grille
Installation Instructions

1x Alpine R2-W8D4 8" R-Series "R2" Subwoofer, Dual 4-Ohm, 350 Watt RMS - (R2-W8D4)

Alpine R2-W8D4 8" R-Series "R2" Subwoofer, Dual 4-Ohm, 350 Watt RMS

PRODUCT OVERVIEW
The next generation of sound performance is here with the new R-Series subwoofers featuring a larger motor structure for more accurate and authoritative bass.
New Motor Structure – The new R-Series subwoofers now feature larger, double-stacked magnets that contribute more motor force for deeper bass and tighter bass control compared to the previous generation.
Oversized Dust Cap – The new hybrid poly ceramic composite dust cap ensures rigidity while also providing incredible internal damping (vibration absorption) to smooth out the bass response and reproduce tight bass.
Increased Accuracy – Alpine’s High Amplitude Multi-Roll (HAMR) Surround Technology allows the cone to efficiently move air while staying cool resulting in incredible accuracy from the subwoofer.

General Specs:
• Size: 8”
• Dimensions: 7.64” x 7.64” x 4.56”
• Frequency Response: 30Hz - 200Hz
• Power Range: 150W - 350W RMS
• Power Handling: 350W RMS / 1000W Peak
• Magnet Weight: 56 oz
• Voice Coil Diameter: 40 mm (2.6”)

T/S Parameters:
• Sensitivity (1W/1m): 83.7 dB
• DC Resistance (Re): 3.6Δ + 3.6Δ
• Free Air Resonance (Fs): 43 Hz
• Equivalent Stiffness: 10.5 L
• Mechanical Q (Qms): 7.08
• Electrical Q (Qes): 0.58
• Total Q (Qts): 0.53
• Cone Area (Sd): 201 cm2
• Linear Excursion (Xmax): 12 mm
• Mechanical Travel (Xmech): 52 mm
BOX SPECS -
SEALED BOX RANGE:
Net Internal Volume: 0.15 - 0.45 ft3

RECOMMENDED SEALED BOX:
External Dimensions: 13” x 13” x 5.5”
Gross Internal Volume: 0.30 ft3
Net Internal Volume: 0.25 ft3

VENTED BOX RANGE:

Net Internal Volume: 0.25 - 0.7 ft3
Fb, Tuning: 36-40Hz

RECOMMENDED VENTED BOX:
External Dimensions: 11” x 9.5” x 21”
Gross Internal Volume: 0.86 ft3

Vent Area (W x H): 8 in2 (8” x 1”)
Vent Length: 17.5”
Vent Displacement: 0.13 ft3
Net Internal Volume (Vb): 0.68 ft3