Package Includes:

• (1) Alpine R2-W8D4 8” R-Series 350W RMS Subwoofer Dual 4 Ohm Car Audio Sub R2W8D4
• (1) Rockville dB11 1400 Watt Peak/350 Watt RMS Mono 2-Ohm Amplifier Car Amp and Bass Remote
• (1) Rockville RWK81 8 Gauge Complete Amp Installation Wire Kit with 100 % Copper RCA

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Description:

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.

Features:

• 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.
  

Specifications:

• 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”)

THIELE-SMALL PARAMETERS

• Sensitivity (1W/1m): 83.7 dB
• DC Resistance (Re): 3.6∆ + 3.6∆
• 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

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
• D2 - F3, Qtc: 59Hz, 0.73
• D4 - F3, Qtc: 59Hz, 0.72

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
• D2 - F3, Ripple, Fb: 33Hz, 2.5 dB, 39Hz
• D4 - F3, Ripple, Fb: 32Hz, 3.2 dB, 39Hz

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Video of dB11:

What's In The Box:

• (1) dB11 Amplifier
• (1) Bass Remote
• (1) Birth Sheet with Tested Power
• Owner's Manual
• Mounting Hardware
• Warranty

Features:

• Rockville dB11 1400 Watt Peak/350 Watt Dyno-Certified RMS Mono 2-Ohm Amplifier Car Amp+Bass Remote
• Dyno Certified RMS Power Ratings: (Certified Dyno Test / Less than 1 % THD) (Use these ratings when comparing with top brands such as Kicker, Rockford Fosgate, etc)
  - 2 Ohm: 350 Watts x 1 Channel <1% THD+N
  - 4 Ohm: 220 Watts x 1 Channel <1% THD+N
• Peak: (Use these ratings when comparing with the top budget brands such as Boss, Power Acoustik, etc)
  - 2 Ohm: 1400 Watts x 1 Channel
  - 4 Ohm: 880 Watts x 1 Channel
• High-Speed MOSFET Power Supply
• Optical Coupler Class “D” Technology
• Fully Adjustable 12dB / Octave Crossover with Differential Circuitry
• Low Pass Filter: 50Hz - 250Hz
• Subsonic Filter: 15Hz - 55Hz
• Phase Control
• Full IC-Controlled Protection Circuitry
• Fully Adjustable 12dB Bass Equalizer
• Mute and Delay Soft Start System
• Status Mode LED Indicator
• Minimum THD at Rated Power: <0.1%
• S / N Ratio: >90dB
• Under Voltage Protection at 10V
• Over Voltage Protection at 16V
• Frequency Response: 15Hz - 250 Hz

Owner’s Manual

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Video of RWK81:

Description:

The Rockville RWK81 8 AWG (American Wire Gauge) amp kit has the following diferences over other amp kits on the market at this price point.

1. Our RCA cables are 100 % copper. These are top of the line RCA cables.

2. Better Resistance: The only thing that really matters with wires is the resistance rating. This is a measurement of conductivity and how much signal is loss per foot of wire. Since Rockville wires are made with around 3 times as much copper as any other wire at this price point, these wires had a much better resistance rating which means they will transfer more power to your amps than the other brands.

3. We do not cheat you on the thickness of the wire. These are standard American wire gauge thickness. This is another reason our conductivity is better than anything else at this price point. Other brands in the market place write 8 gauge, but cheat you on the thickness. We are honest about the thickness.

4. The Rockville amplifier installation kits feature a new soft abrasion proof insulating jacket. This rugged PVC outer jacket allows for 100% improved flexibility over standard power cables making them extremely easy to route through your vehicles interior, and it maintains exceptional resistance to grease and oil. The PVC outer jacket can with-stand an extreme temperature range of -40 to 220 degrees F.

The RCA signal transfer cables included in this kit feature blue and silver twisted pair technology in a clear outer jacket insulation skin. Not only do the blue and silver wires look cool but they also provide superior signal transfer with maximum noise suppression. They are 100% copper to provide absolute lossless perfect signal transfer to your receiver. This technology reduces interference, so your audio signal flows clean and pure at all power levels.

This kit also includes a massive 60 Amp AGU Gold Plated Fuse, so you can be sure it will handle the all the DC power that your amp will need without even the slightest loss of current. The included 7 split loom tube provides protection for your power cable from the typically harsh environment found under the hood of your car.

Audiosavings product experts have tested this amp kit against many leading amp kits on the market and were were impressed not only by the great looks but by the quality of these Rockville installation kits as well. These kits had a lower resistance rating than the other brands we compared and tested them against. What this means is that Rockville manufactures their kits with more copper than other kits at this price point, ultimately providing your amplifiers with better and cleaner DC power, so they work cooler and more efficiently. You will hear the difference a Rockville installation kit will make!

One other last thing worth noting about our kit compared to others. Our kit cosmetically looks the best. It has blue power wire, clear ground wire, and twisted pair RCAs with matching colors. This model includes (1) sets of RCA cables.

Features:

• Rockville RWK81 8 Gauge 2 Channel Car Amplifier Wiring Installation Kit
• (1) 17’ High Grade Twisted Pair of 100% Copper RCA Cable
• 17’ 8 Gauge Translucent Blue Super Flex Power Cables
• 17’ 18 Gauge Blue Remote Cable
• 17’ 16 Gauge Clear Speaker Wire
• 3’ 8 Gauge Super Flex Ground Wire
• Gold Plated AGU Heat Resistant Fuse Holder
• 60 Amp AGU Gold Plated Fuse
• 7’ Split Tube Loom
• Accessories Included: Wire Ties, Ring Terminals, Butt Connectors, Spades, and Grommets
• Soft abrasion proof insulating jacket allows for 100% improved flexibility
• PVC outer jacket can with-stand an extreme temperature range of -40 to 220 degrees F

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The Rockville Difference:

Whenever you see the Rockville shield on a product you know that it has the stamp of approval. While other companies simply import products from China, Rockville manufactures the products in China to lower your cost but do so under American style supervision and quality standards to get you that USA quality that you want!

About Rockville Quality Control Procedures:

The Rockville brand stands for Quality, Innovation and Value. All Rockville products go through the most rigorous quality control standards in the industry. Products go through months of extensive testing before they reach your hands. All user functions are tested and all internal components are tested for quality. Rockville makes products that are virtually un-breakable! Rockville is one of the only brands in its class to test every concept model for weeks or months before starting production. Once production begins, Rockville sends product engineers to their factory to quality control every line of production. During production every product is tested and on top of that Rockville goes the extra mile and has their high level product engineers do an additional quality control. They test a certain percentage of all products from the production line a second time to ensure that the quality meets their vigorous standards, and to make sure that there is never a batch of products with even a slight problem. All Rockville products are backed with a hassle free warranty, though it is unlikely that you will need to use it.

Great features and great quality make Rockville a great choice.