Alpine R2-W8D4 R Series 8" 350W RMS (1000W Peak Power Handling) Dual 4 Ohms, Voice Coil Car Subwoofer
We are a Alpine authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!
What's Inside?
- • (1) 8" Dual 4-ohm voice coil subwoofer
- • (2) 4.5" jumper wires (each wire has a single banana connector on both ends)
- • Plastic trim ring
- • Application guide (English/ French)
- • On-line product registration information
- • Warranty information (English/ French)
- • Important Notice (English /French)
- • Owner's Manual
Why Choose Alpine R2-W8D4 Component Car Subwoofer?
Get Big Bass Without Taking Up Big Space
Want serious bass without giving up a ton of space? The Alpine R2-W8D4 8-inch R-Series subwoofer is built to deliver hard-hitting, accurate low-end in a compact package. Rated at 350W RMS and 1,000W peak, this next-generation R-Series subwoofer gives your system the punch and authority you're looking for, with a 30Hz–200Hz frequency response that brings out deep bass without making your music sound sloppy.
Bring More Punch and Control to Your System
The R2-W8D4 isn't just about power—it’s designed for better control and cleaner bass. Alpine gives it large double-stacked magnets, a Kevlar-reinforced pulp cone, an integrated Faraday ring, and a rigid polypropylene/ceramic composite dust cap to help improve durability, accuracy, and distortion control. Its H.A.M.R. surround allows up to 12mm of X-Max, helping the 8-inch cone move serious air when the bass drops.
Build a Compact System That Hits Hard
With dual 4-ohm voice coils and configuration jumpers, the R2-W8D4 gives you flexibility when designing your car audio system. Add the optional KTE-8G grille, install it in a properly designed enclosure, and pair it with a suitable amplifier for a compact setup that can seriously wake up your ride. If you want aggressive Alpine R-Series bass without stepping up to a larger 10- or 12-inch subwoofer, the R2-W8D4 is a seriously fun upgrade for any car audio enthusiast.
Alpine 8-Inch Subwoofer Comparison Chart | S2-W8D4/S2-W8D2 vs R2-W8D4/R2-W8D2
| Ultimate Alpine 8" Subwoofer Performance Comparison |
S2-W8D4 / S2-W8D2
Next-Gen S-Series 8" Subwoofer – Powerful Bass Performance with Flexible Dual Voice Coil Options
BEST VALUE
- • 8" S-Series Subwoofer
- • 300W RMS / 900W Peak Power
- • Dual 2Ω or Dual 4Ω voice coil options
- • 13mm X-Max for strong bass excursion
- • Wide 23Hz–215Hz frequency response
- • H.A.M.R. surround design
- • Twist-Lock grille compatible
|
R2-W8D4 / R2-W8D2
Next-Gen R-Series 8" Subwoofer – High-Output Bass Performance with a Stronger Motor Structure
HIGH PERFORMANCE
- • 8" R-Series Subwoofer
- • 350W RMS / 1000W Peak Power
- • Dual 2Ω or Dual 4Ω voice coil options
- • 12mm X-Max for controlled excursion
- • 30Hz–200Hz frequency response
- • Heavy-duty 56 oz magnet structure
- • H.A.M.R. surround design
|
Alpine R2-W8D4 Highlights
POWERFUL BASS
350W RMS Power Handling
Add deep and powerful low-end performance to your car audio system with 350 watts RMS power handling and up to 1,000 watts of peak power.
R-SERIES PERFORMANCE
High-Output 8" Subwoofer
The compact 8-inch R-Series design delivers strong bass output while making it easier to build a powerful system in smaller spaces.
FLEXIBLE WIRING
Dual 4-Ohm Voice Coils
The dual 4-ohm voice coils offer flexible wiring options, helping you match the subwoofer to your amplifier and desired system setup.
DURABLE CONSTRUCTION
Kevlar-Reinforced Pulp Cone
The Kevlar-reinforced pulp cone provides a strong and durable design for accurate bass response and reliable performance during demanding playback.
HIGH EXCURSION
H.A.M.R. Multi-Roll Surround
The H.A.M.R. surround helps the cone move efficiently for deep bass, strong output, and smooth performance with up to 12mm of Xmax.
ENHANCED MOTOR POWER
Large Double-Stacked Magnets
The large double-stacked magnet structure provides strong motor force for deeper bass, better cone control, and powerful low-frequency performance.
PREMIUM DESIGN
Polypropylene & Ceramic Dust Cap
The polypropylene and ceramic composite dust cap adds rigidity and damping to help maintain controlled cone movement and clean bass output.
Alpine R2-W8D4 Recommended Amplifiers | Best 8" R-Series Subwoofer Amp Pairings for Powerful Bass
Build Your Alpine R-Series 8" Subwoofer System
Real-world amplifier recommendations for the Alpine R2-W8D4, from compact installations to high-performance R-Series bass systems
Amplifier Matching Overview
R2-W8D4 Power Rating: 350W RMS / 1,000W Peak per subwoofer
Voice Coil Configuration: Dual 4Ω voice coils
Ideal Amp Target: Approximately 350W – 500W RMS for a single subwoofer
Best Overall Match: Alpine R2-A75M 750W mono amplifier
Alpine Recommended Options: KTA-200M and KTA-30MW
Best Overall Match – 750W R-Series Mono Amplifier
The R2-A75M is the top choice for getting serious performance from the R2-W8D4. Its high-output Class-D design provides plenty of amplifier capability and headroom for a powerful R-Series bass system. Proper gain adjustment is important to keep output within the subwoofer's 350W RMS handling.
Best Compact Option – Space-Saving Mono Amplifier
The KTA-200M is an Alpine-recommended compact amplifier option for the R2-W8D4. Its small footprint makes it a smart choice for installations where space is limited and a full-size mono amplifier isn't practical.
Alpine-Recommended Compact Power Option
The KTA-30MW is another amplifier option listed by Alpine for the R2-W8D4. It works well for compact installations where keeping the amplifier footprint small is a priority.
Why the R2-A75M Is the Recommended Choice
Strong Performance: Provides substantial amplifier capability and headroom for a high-performance R-Series system
Power Control: Allows the system to be properly tuned for clean, controlled bass output
R-Series Compatibility: Designed to complement Alpine's high-performance R-Series components
Class-D Design: Efficient mono amplifier design delivers strong bass performance in a compact chassis
System Tuning: Built-in subwoofer controls help dial in the low-pass filter, gain and other settings for cleaner bass integration
R2-W8D4 Dual 4Ω Voice Coil Wiring
Series Wiring: Connects the dual 4Ω voice coils for an 8Ω final load
Parallel Wiring: Connects the dual 4Ω voice coils for a 2Ω final load
Important: A single dual 4Ω voice coil subwoofer is typically wired to either a 2Ω or 8Ω final load using standard series or parallel configurations
Best Practice: Always match the final subwoofer impedance to an amplifier's rated output before connecting the system
Recommended R2-W8D4 Amplifier Settings
Gain Setting: Set gain according to the head unit's output and use a clean test signal to minimize clipping
Low-Pass Filter: Start around 80Hz and adjust according to the enclosure and front speaker system
Bass EQ: Use moderate boost and prioritize clean amplifier output
Subsonic Filter: Use with a ported enclosure to help protect the subwoofer below its tuning frequency
Phase: Adjust phase for the strongest and smoothest bass integration with the front speakers
Recommended R2-W8D4 System Configuration
Single R2-W8D4: Target approximately 350W–500W RMS for a strong balance of output and reliability
Best Overall Build: Pair the R2-W8D4 with the R2-A75M for a high-performance R-Series bass system
Compact Build: Use the KTA-200M when installation space is the priority
Alpine-Recommended Options: The KTA-200M and KTA-30MW are also listed by Alpine for the R2-W8D4
Enclosure: Use an enclosure designed specifically for the R2-W8D4 and follow Alpine's recommended enclosure specifications
Pro Tip: For the best balance of power, control and performance, the Alpine R2-A75M is the standout high-performance amplifier option for the R2-W8D4. Proper gain setting and impedance matching are essential for safe, clean operation.
Frequently Asked Questions (FAQ)
- • Is an 8-inch subwoofer powerful enough for everyday listening?
Yes, an 8-inch subwoofer can produce impressive bass while taking up less space than larger models. It is an excellent choice for listeners who want tight, accurate bass without sacrificing valuable cargo room.
- • Why does the bass seem weaker than I expected after installation?
Weak bass is often caused by incorrect amplifier gain, crossover settings, or an enclosure that does not match the recommended specifications. Proper tuning and using the correct enclosure usually make a significant difference in bass performance.
- • Can I wire the dual 4-ohm voice coils in different ways?
Yes, the dual voice coil design allows multiple wiring configurations to match compatible amplifier impedance requirements. Following the recommended wiring diagrams helps maximize performance while protecting your equipment.
- • Why does the amplifier enter protection mode when the volume is high?
This is commonly caused by incorrect speaker impedance, overheating, poor wiring, or low system voltage. Inspecting the wiring and confirming the amplifier's recommended speaker load usually resolves the issue.
- • What size amplifier should I pair with this subwoofer?
An amplifier that closely matches the subwoofer's recommended RMS power rating provides the best balance of output and long-term reliability. Proper power matching also reduces the risk of distortion and premature speaker failure.
- • Why do I hear a popping or clicking sound during heavy bass notes?
This can occur if the amplifier is clipping, the enclosure is improperly designed, or the subwoofer is exceeding its operating limits. Lowering the gain and verifying the enclosure specifications usually eliminates the unwanted noise.
- • Can I install two of these subwoofers in the same vehicle?
Yes, using two subwoofers can increase bass output while providing more even low-frequency response throughout the cabin. Make sure your amplifier and electrical system are capable of supporting the combined power requirements.
- • Does this subwoofer need a break-in period before it reaches its full potential?
Yes, many users notice smoother bass response after several hours of moderate listening. This gradual break-in allows the suspension components to loosen naturally for more consistent performance.
- • Why does my vehicle vibrate or rattle when the bass plays?
The stronger low-frequency output can cause trim panels, license plates, and other loose interior parts to resonate. Installing sound-deadening material and tightening loose components can greatly reduce unwanted rattles.
Alpine R2-W8D4 Related Videos
← Swipe left or right to browse videos →
Learn How To Wire Subwoofers
- Diameter : 8 Inch
- Sensitivity : 83.7 dB
- Impedance : 4 Ohm
- Frequency Response : 30-200 Hz
- Peak Power Handling : 1000 Watts
- Number of Voice Coils : Dual
- Suggested Sealed Box Volume : .70 Cubic ft.
- Suggested Ported Box Volume : .45 Cubic ft.
- Mounting Depth : 4.56 Inches
- RMS Power Handling : 350 Watts
Features:
- Dual Voice Coil Design: 8" DVC subwoofer with configuration jumpers for flexible wiring and optimized performance.
- Kevlar Reinforced Pulp Cone: High-strength cone construction ensures precise, dynamic bass reproduction.
- Polypropylene/Ceramic Composite Dust Cap: Rigid, lightweight design maintains accuracy under high power.
- H.A.M.R. Surround Technology: High-Amplitude Multi-Roll Santoprene™ surround allows for greater excursion and reduced distortion.
- Double-Stacked Magnet Motor: Powerful motor structure enhances control and delivers tight, clean low frequencies.
Specifications:
- Subwoofer Size: 8-inch
- Voice Coil Configuration: Dual 4-Ohm (Selectable 2Ω or 8Ω wiring)
- Cone Material: Kevlar Reinforced Paper
- Surround Material: Santoprene Rubber (H.A.M.R. Surround)
- Basket Material: Cast Aluminum
- Grille: Not Included
- Free-Air Operation: No
- Sensitivity: 83.7 dB (1W/1m)
- Frequency Response: 30 – 200 Hz
- RMS Power Handling: 350 Watts
- Peak Power Handling: 1000 Watts
- Top-Mount Depth: 4.631" (4-11/16")
- Cutout Diameter: 6-15/16"
- Frame Dimensions: 8.288" (Width) × 8.288" (Length)
- Vas (Equivalent Compliance Volume): 10.5 Liters
- Fs (Resonant Frequency): 43 Hz
- Qts (Total Q Factor): 0.53
- Xmax (Maximum Linear Excursion): 12 mm
- Recommended Sealed Enclosure: 0.2 – 0.5 cu. ft.
- Recommended Ported Enclosure: 0.3 – 0.75 cu. ft.
- UPC: 793276084699
- Weight: 8
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.
Do you own this product?
Write a review!
-
These small subs are giving me some deep deep bass!!! Loud and clear. It might be a little pricey but its all worth it. Would definitely recommend it to my friends
-
By far the best 8 inch sub I've ever tried. Excellent!
