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Alpine KTP-445U 4-Channel Power Pack Amplifier + Portable Bluetooth Speaker

$499.99 $259.95
(You save $240.04)

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Items included in this bundle

Package Includes:

  • (1) Alpine KTP-445U 4-Channel Power Pack Amplifier for Car Audio Stereo Receivers
  • (1) Rockville SONIC-XXL Huge Portable Bluetooth Speaker with Insane Deep Bass + IPX5


  • Alpine KTP-445U Universal Power Pack Amplifier
  • RMS Power @ 4 Ohms: 45 Watts x 4 Channel
  • Compact Class D amplifier for factory and aftermarket receivers
  • Universal plug lets you send signal from RCA outputs or speaker-level wiring
  • Runs off same power circuit as receiver
  • 4-Channel amplifier
  • Built-in high-pass crossover (selectable 60, 80, 120 Hz at 12 dB/octave)
  • Selectable gain switch (high/low) and switchable 2- or 4-channel operation
  • S/N: 80dBA
  • Remote Bass Knob
  • RUX-KNOB Remote Bass Knob
  • Fuse: 15A
  • Dimensions: 7-7/8"W x 1-1/2"H x 2-9/16"D
  • CEA-2006 Compliant

All About Your SONIC-XXL:

How To Set Up Your SONIC-XXL:

How To Set Up Karaoke On Your SONIC-XXL:

What's in the Box:

  • Bluetooth speaker
  • USB Type-C charging cable
  • 3.5MM to 3.5MM aux cable
  • Owners manual


The Rockville SONIC-XXL is an XX large sized portable Bluetooth speaker that is engineered and DSP-tuned to have extremely deep bass with a very pleasant frequency curve. When you pick up this speaker you can feel the weight of the amplifier and the drivers. We give you 3 sound curves that all have amazing sound. Just hold the play/pause button to change from one sound curve to the next. The default one has the most extreme bass. The second EQ mode is similar to the first but with a bit less bass. The last curve is perfect for outdoors when you want more highs and mids. (The 3rd curve is the loudest one). All 3 sound modes have incredible sound.

This speaker is IPX5 rated so it can survive outdoors by the pool, beach or in the bathroom.

This speaker has 3 batteries ran in series that boost the voltage to 11.1 volts. The power of this speaker is like others that literally cost 4 times as much. The sound will blow you away. We are extremely proud of how good this speaker sounds.

The battery life will last around 24 hours at low volume, 12 hours at mid volume, and 3 hours at max volume.


  • Rockville SONIC-XXL Huge and Loud Portable Bluetooth Speaker Boombox with Insane Bass!
  • This can replace a home audio system and its portable!
  • XXL size speaker for insanely deep bass frequencies
  • IPX5 Water Resistant (This can be used by the pool, in a boat, or in the shower as long as you don't fully submerge it)
  • 11.1 Volt battery configuration
  • 70w RMS Power
  • Premium sound quality
  • 3 Different preset equalizer curves (Bass boost, Normal, Loud) (Hold down the play button to change EQ curves)
  • Uses top quality drivers and 2 passive radiator subwoofers to give a rich and wide frequency range with super deep bass
  • Uses DSP tuning along with top-of-the-line drivers to achieve a very balanced sound that is pleasant to listen to even at high volume.
  • Bluetooth 5.0 chipset streams Bluetooth with high fidelity and is efficient on the battery life
  • Built in SD card slot and USB playback (supports cards or sticks up to 32GB)
  • 3.5MM aux input
  • Fast Charge Time: 3 Hours
  • Can play 24 hours at 25% volume, 12 hours at 50 % volume, and 3 hours at max volume
  • Battery charges with included Type-C USB cable
  • Distortion: Less than 1%
  • Frequency Response: 30 Hz-20 kHz
  • Play, Pause, Skip Forward, Skip Back, Volume Up, Volume Down
  • 33 Foot Maximum Bluetooth Range
  • Carry Handle
  • Product Dimensions: 16.89"(L) x 6.26"(W) x 5.58"(H)
  • Product Weight: 7.76 lbs.
  • UPC:
  • 613817121921

WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov

New orders ship within 1 business day
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