Rockford Fosgate Prime R2SD4-10 Single R2 Slim 10" 4-Ohm DVC Shallow Subwoofer - 200 Watts RMS / 400 Watts Peak

This is a great sub for the price! I wanted to use a smaller wedge shaped box for the rear of my Ford Escape, and started looking at shallow subs. This one had the dual voice coils that could run this at 2 ohm, so it seemed like the perfect match for an older alpine sub I picked up that would run it at 2 Ohms w. 350 watts max power. This speaker is rated at 400, so that was no issue. After hooking it all up, it took me a bit to dial the sound in. I hadn't realized my amp had a recessed dial for "Bass EQ" that essentially means "bass boost" that was turned up slightly, which made the speaker sound muddy. After cranking that all the way down, it made a huge difference. I set the high pass filter for the sub on the head unit at 100Hz, and the amp at 100hz as well, and then nudged it a little for some overlap, and it finally sounded like I expected it to. Speaker / headphone companies and internet arguments usually say there isn't a "burn in" period, but I swear this speaker started sounding better after about a week of use with no other adjustments.Additionally, I installed a amp volume knob I purchased separately to be able to adjust the bass on the fly, and mounted it flush inside my steering column, so I had the control right by my turn signal and left hand. I listen to music on so many different formats and platforms that going into the head unit menu to constantly fiddle with the sub volume was way too time consuming to consider. This allows me to leave it where the bass is blended in normally with the rest of the music, or to pump it up slightly if I want a big more bass. If I pull into a quiet neighborhood at night, I can easily cut the bass down without turning the whole stereo down.The speaker sound is great, actually better than I expected for a sub a this price. Initially, when I couldn't get the sound out of it that I wanted, I was right on the verge of returning it. However, I'm glad I didn't, this speaker can thump! As I mentioned, I have a wedge sealed compact box, so I didn't expect to get that much bass out of the entire package. The box came with polyfill, and I just dropped this speaker right in, clearance wasn't an issue. It's actually so loud that I do tend to turn it down if I have the windows down or if someone is in the car that isn't used to louder music. The bass is great, and really rounded out the full sound of my system, using the high pass filter let the door speakers stop sounding muddy from putting bass through them, so now the mids shine a lot more and everything is a nice full sound. This sub essentially gives me the deep bass I was looking for in electronic music and hip hop, and in other music like rock, gives a great thump to the bassline without sounding flabby. Note: This obviously isn't the same as two 12's in a ported box, so I wouldn't expect that kind of earth shattering bass that rattles the mirror of the car next to you. However, to anyone who doesn't know what a set of 12's sound like, this one speaker is enough to make your passenger jump in the seat when the bassline drops. It's in the back hatch area and still deep enough to feel in my chest cavity. I rarely even turn it up even close to all the way as it actually too overpowering at that point. At this point I've played hours of hip hop of all eras, drum & bass, drumstep, and other diverse genres of bass heavy electronic music through it, and there hasn't been anything it hasn't handled at a high volume. I'd only suggest you use a decent brand amp that can give it the power that it wants, and it should sing for you.A couple things to note:Wiring it for 2 ohm: Both on the Rockford website, and in the instructions I received, it showed the positive terminal posts on the same side, so two reds on one side, two black on the other. However, mine actually came with them diagonally across from each other, so essentially one red and one black on each side, making the wiring diagram somewhat incorrect. I had never used a dual coil setup, so before I blew my speaker out with a mistake of some sort, I double checked with Rockford to make sure that one of the two sets wasn't the primary set to wire to first, before wiring to the second set of posts. Rockford's customer service wasn't that helpful, saying: "just put both + together and run to the + of the amp, , then, , run both - together. and to the - of the amp." Yes, that wasn't my question, so I asked again if it mattered which of the two sets I started with, and no response. So, I went ahead and left it as I had set it up (which was the correct way), although I was kind of annoyed that this meant the speaker wires crossed each other across the rear magnet (making a wire "X"), instead of just going from one side of the magnet to the other. That's a small nitpick, but still kind of annoying that the instruction diagram didn't match the actual item I received, and the wires didn't look as clean, even though nobody will see them.Finding a OEM speaker grille to fit: My box is in the rear of my SUV, and I knew with camping and travel season ahead, there would potentially be a time that the speaker could be exposed to something pointy, etc. I know the speaker is there, but you never know if you tell someone to toss something in the back, that they are being that careful. I spent weeks looking for any hint online of what OEM grille you can get for this speaker. The Rockford website wasn't helpful, and emailing the local Rockford dealers got no response. So, I took a gamble, and found the one that fits PERFECTLY with no tools, no removing of the trim ring, and took about 1 minute to install. You need the Rockford R1 Grille Insert, model R1G-10. Amazon didn't have it in stock. I found this on the electronic / audio site that starts with a C and ends with -utchfield. They not only had it in stock, but they had some at half price with scratch and dent packaging (the item itself isn't dented). It popped right in. You just line it up around the edge of the speaker, push one side in, and work your way around. Once you get to the last part, you very slightly bend it inward and it slides in. Then go around the whole thing and push all the sides down for good measure. It's a nice, heavy-ish metal that seems to be a lot more sturdy than the cheap aftermarket ones I found on here, and the center is slightly concave, instead of sticking out like the cheap ones. It fit in there perfectly with enough tension so it doesn't move at all. Just a tip in case anyone else is looking to cover theirs.Overall, at this point, I'd give this a 9/10, mine sounds fantastic, and I'll bet that people who have given this low scores either didn't power or tune theirs correctly, or were expecting a dual 12" sound from a compact 10" sub. If you want big sound in a small space, I'd definitely give this one a shot.

What I purchase these in the ported q bomb box that I bought for my 2004 to 2008 Ford f150 I never expected ground shaking earthquake in bass. I've always loved Rockford fosgate the original series ones when they first came out you can shoot them with a shotgun and still they would shake things off the wall in your house. So I expected these to be good quality speakers but what I got was insane Bass I paired these with the ported box in a punch 300x1 older punch amp and I have had to keep the gain a quarter-turn I've had to keep the EQ bass boost way down because if I don't the subs will shake the engine out of my truck. The bass response is phenomenal veloz hit harder than I ever could have imagined in the higher base we'll rattle the fillings in your teeth. I plan on upgrading to the touch p3s at some point but I don't believe I will need to change a thing these subs are amazing. If you're looking for an economical addition to your car audio system then this is where you want to start look no further I couldn't have asked for a better product thank you Rockford fosgate for knocking this one out of the park again.

Installed these 10" subwoofers into the box under the rear seat of my truck. The box came with 2 other name brand speakers that I thought were matched for it, but they were not. I installed the amp and head unit into my truck and it sounded okay, but never really good. I pulled the speakers that were in the box out, got the model number on them, and found that they were made for a box twice as big as the one in my 2003 Dodge Ram quad cab. After some reading and looking at reviews, I went with the Rockford Fosgate R2 Ultra Shallow 10" 4 ohm speakers. The specs on these said they would work in a box with a minimum of .51 cubic feet of air space. That is what my box was rated for. even with a small 600 watt amp, these subs made it sound so much better. For only $100 for the pair of them, not changing the amp, I am impressed. It's not earth shattering bass, but it is enough to let you feel it, and hear it. So happy I made this purchase.

I have had two of these 10" subs in my truck for about 7 or 8 years. This is a replacement for one that finally blew. These are awesome subs. They sound great and you can't beat the price!

I only had this sub a few days because I had bought it thinking that it required an enclosure with less volume. It sounded great in a single 10" enclosure with .76 cubic meters. I only returned it because I realized later that the normal R2 Prime subwoofer requires the same volume but can handle 50W RMS more, increased sensitivity of 86dB vs the shallow mount's 83dB, and can hit 38Hz vs 45Hz. I was completely happy with the sound and performance so if you need to fit into a shallow enclose, this is great bang for the buck.

I bought this to fit in a custom sub box behind the rear seat of my 2003 Frontier Crew Cab which has virtually no room back there. This fit the box perfect. I have the gain on the amp turned all the way down and the bass on the headunit turned down too and this thing still pounds and fills my truck with bass. I listen to mostly rock so I don't need much bass, but the few rap songs I have really pound, and theres still a ton of potential. I'm looking at putting one of these in my Superduty Crew Cab and it should fill that large space no problem too. Great price from Amazon and prime shipping for the win as usual!