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Specification
AssemblyInstructions : Included
AudioDriverSize : 8 inches
AudioDriverType : dynamic_driver
AudioOutputMode : Surround
AudioOutputMode1 : Surround
AudioOutputMode2 : Mono
Brand : Alpine
BulletPoint : HA-A400.1 Class D Amp Mono 800 Watt Subwoofer Amplifier, 44VL7S122 Solo- Baric L7 Loaded 12" Sub Box Enclosure and HA-AK8 8 Gauge 900W Amp Install Kit
BulletPoint1 : Dual Voice Coil (DVC) Subwoofers with Configuration Jumpers
BulletPoint2 : Push-Type Speaker Terminals (Up to 8AWG Wire Size)
BulletPoint3 : Polypropylene/Ceramic Composite Dust Cap
BulletPoint4 : Kevlar Reinforced Pulp Cone High-Performance subwoofers
BulletPoint5 : Twist-Lock Grille Mount System
Color : Black
CompatibilityOptions : Car / Truck
CompatibleDevices : Car / Truck
CompatibleDevices1 : Television
CompatibleDevices2 : Laptop
CompatibleDevices3 : Desktop
CompatibleDevices4 : Desktop
CompatibleDevices5 : Television
CompatibleDevices6 : Projector
CompatibleWithVehicleType : Car
ConnectivityProtocol : Coaxial
ConnectivityTechnology : Coaxial
ControllerType : Voice Control
ControlMethod : touch
CustomerPackageType : FFP or Safe Packaging
ExternallyAssignedProductIdentifier : 4650185707674
ExternallyAssignedProductIdentifier1 : 793276084705
ExternallyAssignedProductIdentifier2 : 0793276084705
ExternallyAssignedProductIdentifier3 : 00780687343545
FrequencyResponse : 200 hertz
GpsrSafetyAttestation : 1
Hazmat1 : MAGNETIZED MATERIAL
Hazmat10 : DE_NoAir
Hazmat11 : EG_NoAir
Hazmat12 : ES_NoAir
Hazmat13 : FR_NoAir
Hazmat14 : GB_NoAir
Hazmat15 : IE_NoAir
Hazmat16 : IN_MagnetizedMaterial
Hazmat17 : IT_NoAir
Hazmat18 : JP_NoAir
Hazmat19 : MX_MagnetizedMaterial
Hazmat2 : UN2807
Hazmat20 : NL_NoAir
Hazmat21 : PL_NoAir
Hazmat22 : SA_NoAir
Hazmat23 : SE_NoAir
Hazmat24 : SG_NoAir
Hazmat25 : TR_NoAir
Hazmat26 : US_MagnetizedMaterial
Hazmat27 : ZA_NoAir
Hazmat3 : 9
Hazmat4 : AE_NoAir
Hazmat5 : AU_NoAir
Hazmat6 : BE_NoAir
Hazmat7 : BR_MagnetizedMaterial
Hazmat8 : CA_MagnetizedMaterial
Hazmat9 : CN_MagnetizedMaterial
Impedance : 4 ohm
IncludedComponents : • (1) 8" R Series Car 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
InputVoltage : 14.4 volts_of_direct_current
IsWaterproof : FALSE
ItemName : Alpine R2-W8D2 8" R-Series R2 Subwoofer, Dual 2-Ohm, 350 Watt RMS
ItemPackageDimensions_Height : 30.226 centimeters
ItemPackageDimensions_Length : 19.05 centimeters
ItemPackageDimensions_Width : 26.67 centimeters
ItemPackageQuantity : 1
ItemTypeKeyword : vehicle-subwoofers
Manufacturer : Alpine
Material : Plastic
ModelName : R2-W8D2
ModelNumber : R2-W8D2
MountingType : Flush Mount
NumberOfItems : 1
NumberOfPowerLevels : 2
PackageLevel : unit
PartNumber : R2-W8D2
PowerSourceType : Corded Electric
ProcessorCount : 1
ProductDescription : Alpine R2-W8D2 8" R-Series "R2" Subwoofer, Dual 2-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): 83.6 dB
DC Resistance (Re): 1.8Δ + 1.8Δ
Free Air Resonance (Fs): 42 Hz
Equivalent Stiffness: 10.1 L
Mechanical Q (Qms): 7.69
Electrical Q (Qes): 0.52
Total Q (Qts): 0.48
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
ProductSiteLaunchDate : 2022-01-11T14:39:07.922Z
RecommendedUsesForProduct : music
SeriesNumber : 2
SignalToNoiseRatio : 95 decibels
Size : 8"
SpeakerAmplificationType : Passive
SpeakerSize : 8 inches
SpeakersMaximumOutputPower : 1000 watts
SpeakerType : Subwoofer
SpeakerType1 : Subwoofer
SpeakerType2 : Woofer
SpecificUsesForProduct : Music, In-Car Audio Systems
StreetDate : 2023-10-31T00:00:01Z
Style : Modern, Sporty
SupplierDeclaredDgHzRegulation : not_applicable
SupplierDeclaredDgHzRegulation1 : not_applicable
SupplierDeclaredDgHzRegulation2 : not_applicable
SupplierDeclaredDgHzRegulation3 : not_applicable
SupplierDeclaredDgHzRegulation4 : not_applicable
SupplierDeclaredDgHzRegulation5 : not_applicable
SurroundSoundChannelConfiguration : 2.0
TargetGender : unisex
TotalHarmonicDistortion : 83.6 decibels
UnitCount : 1
UnspscCode : 52161500
VehicleSpeakerSize : 8
WarrantyDescription : 1 year
WarrantyType : Limited
WaterResistanceLevel : waterproof
Wattage : 350 watts
WirelessCommunicationTechnology : Bluetooth