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Alpine

Alpine SWA-12S4 BassLine Series 12" 4-ohm Subwoofer

Based on 114 reviews
Condition: New
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$110.00

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At a glance

Condition
New
Model
SWR-8D2
Dimensions
8.66 x 3.94 x 7.09 in
Weight
11.2 lb
Color
black
Material
Poly-Mica, Pulp-Kevlar
Frequency Response
2E+2 Hz
Works with
Laptop, Desktop

Features 5

  • Max RMS Power Capacity: 350W
  • Peak Power Capacity: 1000W
  • Frequency Response: 30 Hz-200 Hz
  • Diaphram Material: Reinforced Parabolic Cone Structure with Poly-Mica Dust Cap & Pulp-Kevlar Cone Body and 2-Piece Structural Parabolic Design

Specs 34

Brand Alpine
Speaker Maximum Output Power 1000 Watts
Frequency Response 2E+2 Hz
Audio Output Mode Mono
Mounting Type Flush Mount
Material Poly-Mica, Pulp-Kevlar
Model Name SWA 12S4
Speaker Type Subwoofer

Frequently asked questions

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Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews

Sound quality and affordability.
The price to quality ratio is very good. They sound much more expensive than their actual price point. I am pushing them with the fifth channel of a Boss PV3700 wired at two ohms and they are loud, clear and low. I set the amp level mid way and the bass boost to 25% and they the are very articulate with the low pass crossover point set at 250 hertz. The four PRV 6x9 midrange on the doors and rear wall panels are set at 240 hertz for a smooth sonic transition from low to mid frequencies. That in combination wit 4 soundstream tweeters connected to the head unit speaker outs, sounds extremely well combined. I can actually hear all the instruments when listening to classical music and jazz. The vocals are very natural sounding and the higher frequencies are crisp and very well balanced with all other frequencies. My minivan is ready for my first trip to Pennsylvania from Florida. I would recommend these as a great starting point for beginner DIY projects. ... show more
Reviewed in the United States on May 1, 2020 by Catalino R.
Deep Clear Bass, Incredible Price.
I'm running a single swa 12" with an alpine mrp-500 and the clarity is incredible with no distorsion at full volume, deff build or order a ported box to alpine's specs of 1.91 cubic ft. Its a large box if your limited on space but the sound quality is unbelivable. At 4 ohms my amp pushes roughly 300 watts and this sub could take more (clean, gain-set) rms power. Two wired for at least 500 watts are a perfect budget build if you got the space. Value per dollar you cant beat these for sound quality, as expected form alpine, as for spl these subs were geared toward pushing air over sound quality, the surround is an 1-1/4" in diameter and alpine claims a maximum peak to peak of 52mm, but you will need more than one if you want crazy loud. ... show more
Reviewed in the United States on December 28, 2013 by Travis R Caldwell
Good speakers
I have two of them hooked up to an alpine mono amp rms 500 watts. The amp is adjusted almost to 3/4. Its sounds good. Hopefully they will last because i will pushed them with this amp.The ONLY thing i dont like is the seller (A&A ONLINE) warranty is for 30 days. If these subs is not reliable i will see. UPDATE the speakers are doing well i switched my amplifier to a kx600.1 kicker amp and they really do well very loud deep bass. I put kicker cvr in their and they didnt sound as good as the alpine. I feel they're good beyond the price and ive been having a systems in my vehicles for a long time ... show more
Reviewed in the United States on January 14, 2015 by Demechio E.
Junk!!!!!
Junk. Had a Alpine mono amp hooked up lasted a full month. Momma always told me you get wht u pay for. And I don't know why I never listen. But I will for now on. Buyers beware. Don't listen to ppl on here. They are just trying to bump on a budget. Lol
Reviewed in the United States on March 20, 2017 by dorian
Eh..........Spend a little more for better quality
This is a decent woofer for the money. I think I expected more from it though. I have it hooked up to a modestly powered amp, an old school Rockford 300S rated at 300 watts rms. It sounds good in my 1.5 cf ported box but when the volume goes up it gets some really stinky burnt voice coil smell. I expected that 300 watts wouldn't over power it but I was wrong. I don't expect this thing to last long but at only $50 I figure it was a cheap lesson. ... show more
Reviewed in the United States on March 6, 2017 by ScottC
CAPTAIN INSANO!!!!
Review Image by Cameron Cameron
I was looking for a good mix between price and sound, and even though I was expecting to spend a little more on subs that what I payed for these, due to the good reviews I went with the Basslines. And WOW! These things are awesome! I used to own a Kicker 15 incher, and it sounded good, but these things sound way better. I have 2 of them in a custom box I built myself tuned to 28 hz, and they SLAM out the low notes, making my back deck jump up and down like crazy. I was showing off to a friend the other day in a parking lot, and a man came outside and asked to look. I asked, "you could hear that inside the building?", and he said "Yeah, my whole office was shaking!" Needless to say, they can handle more power than I need to make my music sound amazing. I'd say for the price, these can't be beat. ... show more
Reviewed in the United States on October 26, 2014 by Cameron Cameron
Be wary of product quality
Everything was great for a couple months, I've got two of these guys hooked up to a matching amp. After two months of nominal abuse, one of them has a blown voice coil. Everything was installed professionally, and I wasn't overpowering the speakers. Both Amazon and Alpine refuse to send me a new one, so I'm forced to buy a new one because I had one thst couldn't take 250 w rms. I'm disappointed more by Alpine's customer service than by the faulty product. ... show more
Reviewed in the United States on April 12, 2017 by Penge567
Alpine products have got to be the best out there
I've had 12" kicker cvx I've had 12" pioneer champion series pro I've had kicker solo classics and kenwood and kicker cvr and I've had kicker kx 2400.1 and kx 800.1 and zx 750.1 and zx 450.2 and I will tell you that I have these alpines on a kicker kx 800.1 doing 200w a piece and they beat harder than any other subwoofer I've had they are amazing quality and a great price I recommend getting them especially for the money ... show more
Reviewed in the United States on May 22, 2017 by Alex Randall
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