Rockville W12K9D2 V3 12" 4000 Watt Dual 2-Ohm Car Audio Subwoofer+dB25 Amplifier

• (1) Rockville dB25 2800 Watt/700w Dyno-Certified RMS 2 Channel Amplifier Car Stereo Amp, Loud!!
• (1) Rockville W12K9D2 V3 12" 4000w Peak Car Audio Subwoofer Dual 2-Ohm Sub 1000w RMS CEA Rated
  

All about your K9 Series Subwoofers:

The Rockville K9 series has been our best selling series of subs and it just got even better! Say hello to the K9 V3. This sub is a game changer. We improved the performance and cooling like crazy! Our engineers did some minor tweaks that give major results for bassheads who like to abuse subs! Weather you are an every day user or someone who pushes the limits of your equipment the K9 V3 is for you!

We made the following upgrades that will keep the voice coil cooler improving the subs ability to take constant abuse.

1. The dustcap was upgraded to the same one we use in our Punisher series. It is top of the line. Sure it increased our cost but we kept the low price the same!

2. We added an inner dustcap that stops heat from building up in the voice coil. We also made our pole vent smaller. The combination of these 2 changes keeps the voice coil significantly cooler when you are playing bass heavy songs or test tones.

3. We added a voice coil spacer that vastly improves the performance.

4. The cone has a smooth finish that allows the dustcap to be glued on more securely.

Features of W12K9D2 V3:

• Rockville W12K9D2 V3 K9 Series 12" Dual 2-Ohm Car Subwoofer
• Peak Power Handling: 4000 Watts
• Program Power Handling: 2000 Watts   
• RMS Power Handling: 1000 Watts 
• Ultra-stiff Non-Pressed Paper Punisher Cone
• Ultra-stiff Polypropylene Punisher Dustcap (The K9 V3 now uses the same dustcap as our Punisher series)
• We added an inner dustcap which helps to avoid hot air build-up in the voice coils resulting in more power handling
• More efficient air ventilation cools the voice coil even better than our V2
• We added a voice coil spacer improving longevity during test tones or extreme bass-heavy songs
• 3" 4-Layer Black Aluminum Former Wound with OFC Wire Made in USA
• This voice coil is stable up to 240 degrees celcius! The voice coil windings are made in the USA!
• Double Stacked 190 Oz High Quality Magnet
• Cast Aluminum Basket With Black Sanded Finish Makes This Sub Very Efficient And Lighter Weight
• Two Chrome-Plated Binding Post Terminals 
• Black Non-Pressed Paper Cone With Beautiful Finish
• Our cones are ultra-stiff. They are thicker and stronger than other subs on the market making our subs able to handle more power.
• Thick Foam Surround Provides Incredible Sound Quality With Minimal Distortion
• Red Stitching Cone Reinforcement Ensures Long Life
• New Ultra-stiff  PolyPropylene (PP) Dustcap
• Impedance: Dual 2-Ohm Voice Coils
• Vented Hole on T-yoke Enhances Heat Dissipation
• Special Custom Rubber Boot Magnet Covers Make the Woofer Look Nice and Protects the Magnet
• Custom Rockville Mounting Gasket Looks Beautiful and Makes it Easy To Mount the Subwoofer Air-Tight
• High BL Magnetic Motor Gap
• We use high grade glue that handles extremely high temperatures which allows our woofer to handle even more power than they are rated
• Nomex Spider provides tear resistance, strength and long-term reliability over regular cotton and poly cotton spiders
• Cutout Diameter: 11.13” inches
• Mounting Depth: 6.85” inches
• Frequency Response: 33 Hz - 1.5K kHz
• 10mm T-Yoke + 10mm Washer
• Sensitivity: 83dB
• Sealed Enclosure Volume: 0.9 – 1.47 Cubic Feet
• Vented/Ported Enclosure Volume: 1.8 – 2.75 Cubic Feet
• XMAX is 28MM
• Weight: 28.67 Lbs.
• Shipping Weight: 33 Lbs.
• Shipping Box Dimensions: 14.57" x 14.57" x 10.83" Inches
• XMAX: 28MM

Detailed Info:

• Body: Non-Pressed Paper
• Gap Plate Inside Diameter: 95mm (3.74 inches)
• Gap Plate Outside Diameter: 190mm (7.5 inches)
• Gap Plate Thickness: 25mm (1 inch)
• Yoke Outside Diameter: 180mm (7.1 inches)
• Yoke Thickness: 10mm (0.4 inches)
• Yoke Pole Diameter: 75mm (3 inches)

TS Parameters:

  Series Parallel Fs  34.42 Hz 34.42 Hz Qms 7.88 8.10 Cms 0.0727 mm/N 0.0727 mm/N Bl    18.56 N/A 9.16 N/A Zmin    5.77 O   1.43 O Re   4.20 O 1.20 O Qes  0.78 0.91 Mms      294.2146 g 294.2146 g dBspl       84.07 83.37 L1kHz        4.76 mH 1.18 mH Sd 548.0133 cm² 548.0548 cm² Qts 0.71 0.82 Rms  8.07 Om 7.85 Om VAS  30.4676 L / 1.08 cu ft 30.4723 L / 1.08 cu ft L10kHz 1.82 mH 0.45 mH

Video of dB25:

Description:

The dB25 is a 2 channel amplifier with 2,800 watts peak output and 700 watts Dyno Certified power. Here at Rockville we offer the best value in car audio. We therefore want to make it easy for you to compare our products to any brands on the market. The peak rating can be used to compare with brands who use peak ratings such as Boss and Power Acoustik while the Dyno Certified RMS rating can be used to compare with top brands such as Kicker, Rockford, Alpine, etc. 

This amp has a fully adjustable 12dB/Octave crossover with differential circuitry. Other features include a subsonic filter, a fully adjustable bass equalizer, and mute and delay soft start technology. The dB25 is protected by a full IC controlled circuit and has professional peak limiter circuitry guaranteeing distortion free music playback at all levels.

The RCA input accepts both balanced and un-balanced inputs. If there is potential inference in the car, the balanced input signal is less susceptible to noise.

The dB amps by Rockville use the top parts and components recommended by Rockville’s very own engineer. These amps are the best sounding out of any series we have ever created. They perform more efficiently resulting in even dB of sound. We created them to be 2 ohm stable just like the world’s most famous amps by Rockford Fosgate, Kicker, etc. If you compare our amp to the most famous amps you will find our amp can compete and, in my opinion, surpass the performance of anything in its class.

Each and every amplifier we manufacture is tested twice. Once at the semi-finished PCB stage of production, and then another test is done at the final assembly. We also run age tests on them. After this is all done, we hire a 3rd party independent company unaffiliated with our factory or with us to go to the factory and inspect 20% of all the production items. We test the power, the controls, and over 20 other tests. We guarantee these amps will satisfy you. We are so confident in your satisfaction of this amplifier that we will offer you a 90 day money back guarantee. If this amp does not perform as well as you expected we will send you a pre-paid shipping label and give you all of your money back. This means if for any reason you want to return the amplifier back for a full refund within 90 days, you can! (Amp must be complete along with the box).

Includes:

• Amplifier
• Birth sheet with tested power
• Owner’s manual
• Mounting Screws
• Warranty

Features:

• Rockville dB25 2800 Watt/700w Dyno-Certified RMS 2 Channel Amplifier Car Stereo Amp, Loud!!
  
• 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 2 Channel <1% THD+N
  - 4 Ohm: 230 Watts x 2 Channel <1% THD+N
  - 4 Ohm Bridged: 700 Watts x 1 Channel
• 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: 920 Watts x 1 Channel
  - 4 Ohm Bridged: 2800 Watts x 1 Channel
• High-Speed MOSFET Power Supply
• Under Voltage Protection at 10V
• Over Voltage Protection at 16V
• Tertiary Supplies Circuitry
• Studio-Grade Bipolar Output Stage Transistors
• Fully Adjustable 12dB / Octave Crossover with Differential Circuitry
• Low Pass Filter: 50Hz - 250Hz
• High Pass Filter: 60Hz -1.2KHz
• Full IC-Controlled Protection Circuitry
• Fully Adjustable 12dB Bass Equalizer
• Mute and Delay Soft Start System
• RCA Line Output
• 8 Volt Preamp Circuitry
• Status Mode LED Indicator
• Minimum THD at Rated Power: < 0.05%
• S / N Ratio: >90dB
• Frequency Response: 10Hz - 100KHz
• Damping Factor: >100 @ 100Hz
• 30 Amp x3ATC Fuse
• Dimensions: (W x H x L) 9" x 2.4" x 19.4"

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