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Recoil SL1708 240 Watt 8" Under-Seat Slim Amplified Car Subwoofer with 99.99% Oxygen Free Copper Installation Wiring Kits

4.2 out of 5 stars 380 ratings

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-36% $89.99
List Price: $139.99

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Enhance your purchase

Speaker Type Subwoofer
Model SL1708
Vehicle Speaker Size 8 inch
Speaker Maximum Output Power 240 Watts
Woofer Diameter 8 Inches

About this item

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  • All in one 8"(210mm) subwoofer with small unit design to fit under most vehicle seats.
  • Built-in Class-AB amplifier, "All-In-One Bass Addition Package "no need for external amplifier.
  • Die-cast aluminum heatsink.High quality material design and craftsmanship.Supports RCA (low level) OR speaker(high level) signal input from audio source
  • Adjustable GAIN control to match original vehicle system, so all speakers complement each other
  • Easy-to-use control adjustments conveniently located on side of unit. Remote bass volume control knob
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Frequently bought together

  • Recoil SL1708 240 Watt 8" Under-Seat Slim Amplified Car Subwoofer with 99.99% Oxygen Free Copper Installation Wiring Kits
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Product Description

SL1708
Output RMS 120W
Signal to Noise Ratio ≥85dB
Total Harmonic Distortion ≤1%
Input Sensitivity 5V-0.1V
Signal input mode RCA(Low Level) Or speaker (High Level) input
Bass Unit 8 inch(210mm)2Ω
Frequency Range 40-150Hz(-3dB)
Input Power DC 9V-16V
Fuse Rating 25amp
Set pad size 9.67”
Dimensions (D x H): 9.67” x 3.15 Inches
SL1708 SWS12 SL1779
SL1708 SWS12 SL1779
Bass Unit 8” 12” 7”X9”

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Recoil SL1708 240 Watt 8" Under-Seat Slim Amplified Car Subwoofer with 99.99% Oxygen Free Copper Installation Wiring Kits


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What's in the box

  • 8" Subwoofer Unit, Installation Wiring Kit, Bass Volume Remote Control with Cable
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    Customer Rating 4.2 out of 5 stars (380) 4.0 out of 5 stars (312) 3.4 out of 5 stars (63) 4.5 out of 5 stars (213) 3.7 out of 5 stars (62) 3.8 out of 5 stars (115)
    Price $89.99 $69.95 $69.99 $104.99 $74.99 $79.99
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    Vehicle Speaker Size 8 inch 8_inch 8 inch 8_inch 8 inch 10 inch

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    Customer reviews

    4.2 out of 5 stars
    4.2 out of 5
    380 global ratings

    Top reviews from the United States

    Reviewed in the United States 🇺🇸 on December 7, 2020
    Customer image
    5.0 out of 5 stars Honest Review + Detailed Install Instructions
    By Sosa_yum on December 7, 2020
    Hello Amazon,

    I drive a 2005 Xterra.

    This is my honest review, as well as a summarized breakdown of my installation in instructional format for those of you new to this or unaware of what you’re getting into.
    I am a certified low voltage electrical technician, so my instructions are trusting.

    Firstly, the review post install.

    The subwoofer in its entirety took me about 4 hours to install. This included having to splice into my speakers, finding the firewall grommet, hanging and mounting the power wire, and pulling up trim to hide the wires.

    After using for roughly 2 weeks, I unhooked the subwoofer for about 4 days. It was under my seat on a little platform I built to keep it off the carpet. It was getting so hot that it began to melt my carpet. I didn’t think it was the product as all fuses were performing their job and power testing showed no wrong numbers or percentages versus the manufacturer specifications.

    The gain on this device is absolutely heavy. Please be precautionary with messing with the gain, bass boost, and LPF. Adjust only a 16th of a turn once a day or once per hour of music.

    Once I adjusted my settings lower than initially set, my sub is self containing temperature levels at a medium warmth instead of a danger hot.

    The subwoofer delivers incredible sound quality and heaviness to the hits. Completely transformed the music experience in my car for all 4 passengers.

    You will need to do some work and have supplies that the Chinese instructions don’t soecifiy-
    Supplies needed:
    You will need a micro flathead/electronics screwdriver flathead to adjust the master knobs.
    You will need an 8 gauge splicing kit. Just get an 8 gauge wire crimp coupler, and some 8 gauge heat shrink.
    You will need a 3/4” drill bit.
    I recommend you purchase a trim removal tool kit for $10 off Amazon to assist in removing trim around your vehicle for wire management and access.
    You’ll need philips and whatever else is required to take nuts and bolts off your vehicle.
    You will need 20 zip ties.
    You will need 20 blue/orange/grey wire nuts.
    You will need HIGH QUALITY SPEAKER WIRE.

    Start by connecting the end of the red cable to positive on battery terminal. Begin to move the power wire around your engine bay and imagine the wire ziptied to the harness as seen in the photo. You want to go ahead and lay this out so you know how much slack to cut before you run it through the firewall.

    Next, go under the driver side dash, pull carpet and insulation back, look for the same black squishy rubber grommets as seen in my photo where the red wire is coming from. Take your drill and drill through the rubber pancake. This will make a hole to slip the wire through.

    Give yourself an extra 18” of slack on the wire you will connect to the battery. Cut at the extra 18 inch mark. Twist the copper strands and feed through the firewall access.

    Now connect your wires back together with the coupler.

    Feed the wire through the trim to the seat you will be hiding the speaker under.

    Take the blue and grey 4 wires and leave them under the seat.

    Take your high quality speaker wire, and 4 colors of electrical tape, open your bezel on the dash and access the radio wire harness.

    Cut 4 inches back from the radio into each speaker wire and simply splice the new wire into the cut, wire nut it, tape it, and label the tape Front left Neg, Front Left Pos, Front Right Neg, front right pos. Fish these wires to the leg well and then under the trim by your driver door.

    These will then respectively connect to the blue and grey wires with wire nuts.

    This will plug into the sub.

    Take your knob controller and drill the screws and controller somewhere comfy for you. If no where plastic like the console is available, I’d subject screwing it directy onto something plastic on your seat that’s accessible. Or you better be committed to being safe with a loose knob controller.

    Test the radio on a dubstep or bass heavy YouTube station like UKF, Kevin Gates, Billie Eilish, Trap Nation, Skrillex, etc.

    Adjust your EQ to preference first. I suggest setting it to standard POP or Bass Heavy.

    Now, and I’m dead serious or you risk dangerous heat and possibly destroying your subwoofer, adjust the master knobs with the tiny flathead by a 16th of a turn maximum. Only adjust again and Bassboost after first install enough until the subwoofer is activated

    . After that point, wait until tomorrow and adjust and listen.

    Reduce or increase LPF for heavy echo This is that bone vibrating feeling.

    Reduce or increase gain for power allowed to the subwoofer. This affects the punch and intensity.

    Bass boost knob controls the “juiciness” of that makes sense.

    Adjust the gain and boost courteously. LPF is overwhelming at a 16th turn so go light.
    Images in this review
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    65 people found this helpful
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    Reviewed in the United States 🇺🇸 on September 26, 2022
    Customer image
    5.0 out of 5 stars Using this for my Can-Am Ryker. Great sound and quality without question for the money!
    By Kevin on September 25, 2022
    So i will make this quick and easy... If you are looking to add a bit of thump to your already installed system, then you found it here. For the price you can go wrong. I just had installed it on my 2020 Can-Am Ryker Rally with 0 issues. You can add this to lets say a BOSS cheap $99 built in amp speakers set and just simply splice the speaker wire x1 and add this. I like the Auto on off feature which will be great for saving battery life on the small 12V motorcycle style battery i am using. When it gets sound input it turns on, great feature and no need to even add the remote wires or second set of speaker wires as a add on to already set up systems. I have the Can-Am LinQ Top Case and this fits perfect with just the Velcro it came with and solid in place in the bag pictured in the photo with room to add some small items if need be.
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    Customer image
    Reviewed in the United States 🇺🇸 on October 23, 2021
    One person found this helpful
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    Reviewed in the United States 🇺🇸 on October 1, 2022