---
product_id: 190697496
title: "Recoil SL1708 400 Watt 8\" Under-Seat Slim Amplified Car Subwoofer+Wire Kit"
brand: "recoil"
price: "₱6553"
currency: PHP
in_stock: false
reviews_count: 3
url: https://www.desertcart.ph/products/190697496-recoil-sl1708-400-watt-8-under-seat-slim-amplified-car
store_origin: PH
region: Philippines
---

# 3.1” ultra-slim height 400W peak power Remote bass control Recoil SL1708 400 Watt 8" Under-Seat Slim Amplified Car Subwoofer+Wire Kit

**Brand:** recoil
**Price:** ₱6553
**Availability:** ❌ Out of Stock

## Summary

> 🎵 Elevate your drive with bass that fits anywhere!

## Quick Answers

- **What is this?** Recoil SL1708 400 Watt 8" Under-Seat Slim Amplified Car Subwoofer+Wire Kit by recoil
- **How much does it cost?** ₱6553 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/190697496-recoil-sl1708-400-watt-8-under-seat-slim-amplified-car)

## Best For

- recoil enthusiasts

## Why This Product

- Trusted recoil brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ultra-Slim Design:** At just 3.1 inches tall, fits discreetly under any car seat or in tight trunk spaces.
- • **Powerful yet Compact:** 400 Watts peak power delivers deep, room-shaking bass without sacrificing space.
- • **User-Friendly Control:** Includes a remote bass volume controller and LED indicators for easy monitoring and adjustments.
- • **Seamless Compatibility:** Works with factory OEM radios and aftermarket units via RCA and high-level inputs.
- • **Customizable Bass Experience:** Adjustable input sensitivity, bass boost up to 12dB, and phase switch for perfect sound tuning.

## Overview

The Recoil SL1708 is a slim, 8-inch amplified car subwoofer delivering 240 watts peak power. Its ultra-compact 3.1-inch height design fits neatly under seats or in trunks, making it perfect for space-conscious audiophiles. Featuring versatile connectivity with RCA and high-level inputs, adjustable bass controls, and a remote volume controller, it offers customizable, powerful bass enhancement for any vehicle audio system. Backed by a one-year warranty, it’s the ultimate upgrade for immersive car sound.

## Description

Full description not available

## Features

- 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)
- Warranty : We provide a one-year product warranty, and within 12 months quality issues can be directly replaced with a new one.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Model Name | SL1708 |
| Speaker Type | Subwoofer |
| Special Feature | Bass Boost |
| Recommended Uses For Product | For Cars |
| Compatible Devices | Projector, MP3 Player, Laptop, Desktop, Television, Tablet, Smartphone |
| Subwoofer Diameter | 8 Inches |
| Unit Count | 1 Count |
| Controller Type | Bass Volume Remote Control |
| Surround Sound Channel Configuration | 1.0 |
| Color | black |
| Included Components | 8" Subwoofer Unit, Installation Wiring Kit, Bass Volume Remote Control with Cable |
| Product Dimensions | 9.9"D x 9.9"W x 3"H |
| Item Weight | 10.4 Pounds |
| Is Waterproof | FALSE |
| Warranty Type | Limited |
| Number of Items | 1 |
| Control Method | Remote |
| Speaker Size | 8 Inches |
| Power Source | Corded Electric |
| Woofer Diameter | 8 Inches |
| Vehicle Service Type | Car |
| Package Type | Standard Packaging |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 8 Inches |
| Subwoofer Connectivity Technology | Wired |
| Connectivity Protocol | RCA |
| Includes MP3 player? | No |
| Specific Uses For Product | Car Audio |
| Style | Active 8" Underseat Subwoofer & Wiring Kit |
| Manufacturer | RECOIL |
| Item Weight | 10.4 pounds |
| Country of Origin | China |
| Item model number | eggreh-607 |
| Manufacturer Part Number | eggreh-607 |
| Special Features | Bass Boost |
| Wattage | 240 watts |

## Product Details

- **Brand:** RECOIL
- **Speaker Maximum Output Power:** 240 Watts
- **Frequency Response:** 150 Hz
- **Connectivity Technology:** RCA
- **Audio Output Mode:** Stereo

## Images

![Recoil SL1708 400 Watt 8" Under-Seat Slim Amplified Car Subwoofer+Wire Kit - Image 1](https://m.media-amazon.com/images/I/71pk8htgmkL.jpg)
![Recoil SL1708 400 Watt 8" Under-Seat Slim Amplified Car Subwoofer+Wire Kit - Image 2](https://m.media-amazon.com/images/I/81Uuex43Z4L.jpg)
![Recoil SL1708 400 Watt 8" Under-Seat Slim Amplified Car Subwoofer+Wire Kit - Image 3](https://m.media-amazon.com/images/I/71iOOsuIDpL.jpg)
![Recoil SL1708 400 Watt 8" Under-Seat Slim Amplified Car Subwoofer+Wire Kit - Image 4](https://m.media-amazon.com/images/I/71C7a4uGJ3L.jpg)
![Recoil SL1708 400 Watt 8" Under-Seat Slim Amplified Car Subwoofer+Wire Kit - Image 5](https://m.media-amazon.com/images/I/61gARuUBE9L.jpg)

## Questions & Answers

**Q: How does one power it? Will it work directly connected to head unit?**
A: Has built in amplifier. Must be powered from the battery. 8 AWG cable long enough to go to the battery is included with a fuse holder at the battery.

**Q: Why is my subwoofer missing 3 transistors?**
A: Sometimes PCB's are designed for multiple products. Certain applications require more components, certain applications less.

**Q: Where is this made?**
A: Made in China.

**Q: Does it directly attach to head unit w/o extra amp or car battery involved?**
A: Must use battery for power. You have two options for signal splice into speaker leads or if you have an aftermarket stereo, use RCA cables (not included).

## Customer Reviews

### ⭐⭐⭐⭐⭐ Honest Review + Detailed Install Instructions
*by S***M 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.

### ⭐⭐⭐⭐ Easy install
*by M***Y on April 3, 2024*

This product does well for what it is. It’s relatively easy to install and sound is decent. The fact that it’s self contained and amp is built in takes a lot of the wiring complications out of the install process. Since the quality and types of stereos vary, keep in mind that you will probably have to adjust the different screw type dials on the unit to increase the decibel output (initially I got no sound out of the unit and panicked). I installed this in my daughter’s Toyota celica and the seats were too low for the unit to fit under the seat. Because the car is so small, I first tried using the trunk/hatch area for its location, but it just didn’t have the punch that far back. I ended up replacing the provided speaker wire with good quality RCA wires and relocated the unit into the back seat floorboard area and the sound was very good. The only problem I had was that it sounded too good with the volume cranked up and I’m pretty sure I blew out the stock back seat speakers that I hadn’t replaced yet (I had already upgraded the door speakers). So I’ll have to upgrade the rear speakers soon, but so far my kid hasn’t complained because I don’t think she is cranking up the volume as loud as I did. Overall this is a good product that relatively easy to install and provides good sound from under (or in my case behind) the front seat.

### ⭐⭐⭐⭐⭐ Broke my heart... Replacement/Support is awesome
*by J***B on March 26, 2024*

Not an audiophile but after 20 years of a stock system I just needed the bass back that I had in my 20s, in my newest vehicle. Ford Maverick doesn't offer ample space for the 12" box I wanted. This space saver seemed perfect.It was the perfect size, the wire kit was surprisingly nicer than I expected. It was a bit punchy at first, expected for it's size and construction, but with some tuning it sounded amazing for what it is.Spent a 1/2 hour listening and loving that night, then went out the next day to tidy up my work. Spent roughly another 1/2 hour listening before getting to work and before I could it died on my in the middle of playing. Checked all my work with a multimeter and all proper power is flowing, it just refuses to turn on.I see others have had problems with longevity and heat, but I didn't even get a chance for it to heat up. I'm older and care about my hearing so I wasn't pushing limits here either. I'm very disappointed because it was awesome for about an hour. I reached out to Recoil US, we'll see how it goes.Based on others reports, once this gets fixed/replaced I'll be buying an assurion warranty and 🤞.Update: The companies USA based support was available via phone and e-mail. They answered me and walked me through trouble shooting. They offered warranty replacement but advised to do an exchange within the 30 day return limit. Nice to know they stand behind it for warranty.The new unit is great. Pretty amazing sound for what it is, pretty nice price.

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-02-07*