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

4.2 4.2 out of 5 stars 459 ratings

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Purchase options and add-ons

Brand RECOIL
Model Name SL1708
Speaker Type Subwoofer
Connectivity Technology RCA
Special Feature Bass Boost

About this item

  • Recoil SL1708 8” Under Seat Slim Amplified Car Subwoofer. 240 Watts Peak / 120 Watts RMS.
  • Special wheel shape and super shallow design with only 3.1” height fits anywhere in your vehicle. You can fit it under seat or in your trunk.
  • Low Level RCA Input. Use RCA interconnect cable to link the SL1708 with any aftermarket source unit. High Level Inputs with Auto Turn-On Technology. It will be used to connect SL1708 to your factory OEM radio.
  • Adjustable Input Sensitivity. Soft Delayed Remote Turn-On. Thermal Protection Circuit, Short Protection Circuit.
  • Blue Power/Red Protect LED Indicator. Phase Switch: 0° or 180°. Low Pass Filter: 40Hz - 150Hz. Bass Boost: 0 - 12dB @ 50Hz. Subwoofer Level Remote Control Included. Super Compact Dimensions: 9.6” x 3.1” (245 x 80mm)
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$89.99
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$9.99
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$18.69
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RECOIL SL1708 8" Under-Seat Slim Amplified Car Subwoofer with 99.99% Oxygen Free Copper Installation Wiring Kits
RECOIL SL1708 8" Under-Seat Slim Amplified Car Subwoofer with 99.99% Oxygen Free Copper Installation Wiring Kits
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Price$89.99$98.76$87.65-43% $99.99
List:$173.99
$74.99$96.37
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Value for money
4.3
4.6
5.0
5.0
3.6
3.8
Easy to install
4.3
4.6
5.0
5.0
3.8
4.5
Sound quality
4.0
4.5
5.0
4.7
3.4
3.7
Bass quality
4.3
4.5
3.5
3.5
Sold By
recoil
HYANKA
HYANKA
Amazon.com
southmanage
Speece, Inc.
speaker size
8 inches
8 inches
8 inches
8 inches
8 inches
8 inches
power source
Corded Electric
Corded Electric
Battery Powered
Corded Electric
Corded Electric
Corded Electric
connectivity tech
RCA
Wired
8 Inch Compact Underseat Subwoofer
RCA
RCA
RCA
speaker type
Subwoofer
Subwoofer
Subwoofer
Subwoofer
Subwoofer, Woofer
Subwoofer
mounting type
Car Mount,Under Seat Mount
8 Inch Compact Underseat Subwoofer
8 Inch Compact Underseat Subwoofer
Car Mount
Car Mount,Truck Audio,Under Seat Mount
Car Mount,Under Seat Mount
weight
10.4 pounds
8.55 pounds
4.45 kilograms
10.25 pounds
control method
remote
remote
remote
remote

From the brand


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
Subwoofer

Recoil SL1708 is a high end under seat enclosure designed to bring exceptional bass to any vehicle with limited space. This impressive new design features a high performance 8″ subwoofer internally powered by an efficient amplifier engineered to play hard in tight spaces.

Unlike other rectangular subwoofers, Recoil SL1708 is designed with round shape, plus its 3.1” micro-thin super shallow design, it slides under all the seats and works well behind truck seats or in small trunks where space is at a premium.

SL1708 comes with plug-n-play wiring kit and mounting brackets. We truly make the installation a breeze. It accepts both speaker level or RCA level inputs, so you can connect SL1708 with any factory or aftermarket source unit.

If you are looking for a compact bass solution in your vehicle, then the SL1708 by Recoil is the right product for you!

Included Items Inside The Package

  • 8" Subwoofer Unit
  • Owner's Manual
  • Installation Wiring Kit
  • Velcro Mounting Tape(Male and Female)
  • Mounting Bracket with Hardware(Screws)
  • Bass Volume Remote Control with Cable

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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RECOIL SL1708 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
  • Looking for specific info?

    Customer reviews

    4.2 out of 5 stars
    4.2 out of 5
    459 global ratings

    Customers say

    Customers are impressed with the sound quality of the subwoofer. They say it fills in the low bass nicely. Customers also appreciate the value for money, saying it's a great value add on to factory stereo. They mention that the installation is fairly easy, and the sub fits in their trunk very easily. Customers are also happy with the quality of this subwoof, saying that it'd be a good buy for the price.

    AI-generated from the text of customer reviews

    67 customers mention55 positive12 negative

    Customers like the sound quality of the speakers. For example, they say it fills in the low bass nicely, and gives a more clear, loud, and well-rounded sound. The subwoofer compliments it perfectly, and it blends beautifully with the JBL speakers on the doors. Some mention that it takes a bit to break in, and that it's the perfect amount of subwoof for most music styles.

    "...The sound is more than decent for a subwoofer of its size, remember it's only a 8" woofer...." Read more

    "...The subwoofer delivers incredible sound quality and heaviness to the hits...." Read more

    "...I like it. It REALLY rounds out the sound and opens up the low end. It won't rattle the windows but I don't need it to. So far so good!..." Read more

    "...a wide spectrum of tunes but mostly hip hop and this sounds good playing that type of music. ***..." Read more

    41 customers mention38 positive3 negative

    Customers appreciate the value of the speakers. They say it's well worth the price, a great value add on to factory stereo, and sounds good for a good price. Some customers also love the super low end.

    "...For me, this was a good purchase for the price and value of product." Read more

    "...Well worth the price honestly and about what you should expect for it" Read more

    "...in one and paid best buy to install it, this brings just the right amount of low end to give me a full sound experience..." Read more

    "Pretty good for the price, don't expect a lot of base and its a little boomy but better than nothing for sure...." Read more

    31 customers mention23 positive8 negative

    Customers find the installation of the speakers fairly easy. They mention that the subwoofer was easy to connect and sounds awesome. Some say that the installation was easy enough to do without the need for professional installation.

    "...Installation was standard...red wire to battery, black to ground, blue to remote on the radio deck, and there is also a remote subwoofer volume..." Read more

    "...This powered sub fits the bill. Install was simple IF you are familiar with car audio systems...." Read more

    "...This unit fits perfect, the installation is very straightforward and overall, making it work is easy...." Read more

    "...Also, the instructions are minimal and when using the RCA input, the settings on the sub are bypassed by those on the head unit." Read more

    31 customers mention26 positive5 negative

    Customers like the fit of the speakers. They mention that it fits in their trunk very easily, takes up very little space, and is great for small cars. The aluminum body makes it great for smaller spaces. Overall, customers are satisfied with the fit and performance of the product.

    "...subwoofer is what caught my eye, it's like 9" wide and 3" tall, super duper compact, but it's got some heft to it (weighs about 10lbs)...." Read more

    "...This unit fits perfect, the installation is very straightforward and overall, making it work is easy...." Read more

    "It's actually better than expected. Easy to wire up, fits perfect under my center console, and hits just hard enough to make your music sound better..." Read more

    "...Plus it's small, sits in the bracket where the OEM jack was. It'll most likely last longer and it's not in the way like the original sub...." Read more

    27 customers mention22 positive5 negative

    Customers like the quality of the speakers. They mention that it is well constructed, sturdy, and has great sound. The cables are high quality, and are shrink wrapped and crimped well. Overall, customers are happy with their purchase and recommend it to others.

    "...Completely transformed the music experience in my car for all 4 passengers...." Read more

    "...you need to hook this up is included in the box and is all quality materials. This is a good sounding sub after you adjust your expectations...." Read more

    "...gonna sound like two 12's with 1000 watts, but for what it is, it's really good...." Read more

    "For starters, the cables are high quality, shrink wrapped and crimped well...." Read more

    13 customers mention13 positive0 negative

    Customers are satisfied with the performance of the speakers. They mention that it does a pretty good job, has a solid performance, and works perfectly fine if the temperature is at least 70. They appreciate the quality low frequency performance, saying that making it work is easy. Overall, customers are happy with the product's performance and recommend it to others.

    "...] I've been using this setup for over four months and have not had any issues with it, particuilarly no over heating...." Read more

    "...perfect, the installation is very straightforward and overall, making it work is easy...." Read more

    "...The above considered, the unit has decent low end output now but by no means overpowering...." Read more

    "...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..." Read more

    10 customers mention0 positive10 negative

    Customers are dissatisfied with the heat produced by the speakers. They mention that it runs abnormally hot, melting carpets and blowing fuses.

    "...It was getting so hot that it began to melt my carpet...." Read more

    "...It lasted about 8 months. Definitely noticed that it ran very hot. It started to blow fuses as soon as it powered on...." Read more

    "...My only concern is the heat. It gets VERY hot...." Read more

    "...I reached back under this unit and it was too hot to hold. It is just sitting on the floor mat under the passenger seat so that isn't helping things." Read more

    10 customers mention0 positive10 negative

    Customers are dissatisfied with the power up of the speakers. They mention that the speakers would not power on at all, the auto turn on feature did not work, and the amp does not work. Some customers also report that the sub has quit working and blows fuses almost instantly.

    "...A little disappointed that it didn’t turn on with the RCA signal like most do. Had to go back and hook up the remote wire...." Read more

    "...The auto turn on feature did not work so had to run the remote wire, other than that its a pretty good sub for 100 bucks." Read more

    "First sub arrived last week and was a dud, would not power on at all. Verified power and fuses and all was good...." Read more

    "Update 3/31/23: Sub has quit working. It blows fuses almost instantly. I’ve checked the wiring for shorts and the problem is internal...." Read more

    Honest Review + Detailed Install Instructions
    5 Stars
    Honest Review + Detailed Install Instructions
    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.
    Thank you for your feedback
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    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
    Reviewed in the United States 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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    Reviewed in the United States on October 16, 2023
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    Reviewed in the United States on June 26, 2023
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    Top reviews from other countries

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    josue
    2.0 out of 5 stars Suena bien pero se calienta (2 ctualizaciones hasta abajo)
    Reviewed in Mexico on February 25, 2023
    9 people found this helpful
    Report