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The ground should be: 1) No longer than 18" 2) contacting a large surface area of bare metal (sand paper the paint away, attach and then spray paint back over) 3) At least 4 gauge wire in most cases Does your ground meet at least the first two items? (the last one being up for debate)

That's a good question and one that's hard for us to give a definitive answer on. It all depends on what the used sub has been subjected to in the past. Has it been in a box all this time or has it been stored? Has the sub been in sunlight for any extended period of time? If so, then the rubber...

The answer to your question varies depending on your specific application. Because you stated that you're interested in the "alpine type r subs" I can only assume you're interested in using at least two subwoofers with this amplifier. If this is the case, you will want to select the...

That sound like a great idea. Also, we have developed a guide that you may find useful when building your own box. I hope this helps. Anyone got any other suggestions on box building?

Alright, I'm not a Super tech head when it comes to Subs/Amps but i know a little. I'm thinking about switching out my current installation for another. My head unit is an Alpine 9856 and that's staying, however in the trunk here's what I've got: 12" Kicker Comp VR (i THINK its 2-ohm) inside an MTX SledgeHammer...

Ok, I basically need some help/advice picking out subs. The three brands I have in mind are either Alpine, MTX, or Eclipse. I'm gonna need two of them, and they'll be in a Ported/Vented enclosure. The two amps I have to work with will be a RockFord Fosgate Punch P250.2 AND an MTX Thunder 4244 Amp to...

Both powered subwoofers are nice. Since you want to fill in the lower part of the music, then I recommend the Infinity BassLink . It has a frequency response of 20-120Hz and these are the frequencies that most speakers do not reproduce. The MTX Thunderlink has a frequency response of 39-150Hz and while...

I have a kicker comp vr 15" dual voice coil sub and I am looking for the right amp to power it. price is not a issue so I'm just wanting the best system I can have with my sub. anything will help. thanks

Hey, I was wondering if anyone either owns or has first hand heard any of Rockfords Subs, primarily the Punch2. I'm thinking about getting two of 'em installed w/ 200 watts hitting each one (the stated rms). I'm wondering specifically if they hit hard, handle lows well, compared to alpine/mtx/other brands...

I'm looking for better info about matching enclosure(s) with a sub or subs. Basically the jist of what I've gathered is that ported enclosures give the ability for more bass w/ a smaller amp, while sealed enclosures require a bit more boost however give a tighter, cleaner bass. I'm not sure if there...

What would sound better??? I dont know much about subs. A little help please.

Hi Clearnoise, I've got a 2000 F-150 extended cab and put in an MTX Amplified Thunderform with dual 8" woofers a couple years ago. It fits perfectly under the passenger side of the rear bench seat, and comes with a 200-watt built-in amp. I've found it to provide the perfect amount of low end for my tastes...

I ordered these products, but will they work okay together?... i have tried wiring this stuff up and the amp works, but the sub isnt doing anything...

I just wanted to chime in and say that I checked our information on a 2003 Nissan Frontier crew cab pickup and we do not have a Q-logic box that is custom made for this vehicle. I checked both the Rockford Fosgate and non-Rockford Fosgate system and neither show a Q-logic box as fitting. The only system...

i listen to mostly rock and alternative. sometimes alittle rap. right now i already have 2 12 inch kicker comps on a sony amp. they sound good and hit hard. but what im getin at is i want more.... so i was think of adding a single 15 inch sub and creating a custom enclosure for the 3 subs i...

Thanks to both of you for taking the time giving me feedback. I appreciate it! For sake of understanding what i'm currently asking out of my setup, does it mean I have actually asking 4 ohm loads out of 2 ohms-only sub? If so, am I hurting the sub and/or the amp in any way or am I just underusing...

ok the picture below is what i have now and they dont beat at all and the amp that i had them hooked up made them sound worse. Kenwood Kicker i would proably be using the box thats there but recovering it and im gonna be getting a better Pioneer headunit right now i have the DEH-1800 and i will also...

TigerHeli is on the money. You can check the resistance of the voice coil with a meter and it will give you an idea of what the nominal impedance of the subwoofer is. With a meter, I have found that the resistance you read will normally be a little lower than the nominal impedance. If you read 3.xx...

is there any way to physically identify what ohm a Subwoofer is? (i.e 2,4,8?), or a wiring option you could look @ that would tell you? Thanks!

I just purchased a Punch P3D212 DVC at 2 ohms ( http://www.rockfordfosgate.com/products/product_details.asp?cat_id=4&series_id=31&family_id=11&item_id=108288&locale=en_US&p_status ) and hooked it up on a Sony XM-D9001GTR Mono amp ( http://www.xplodsony.com/files/manuals/XM-D9001GTR_Owners_Manual...

What R/F amp would push these to thier max? Are these just as good as Alpine Type R. Any help would be great. Thanks

Since you have the Type-R subwoofers, I would not get that amp. A dual 2 ohm voice coil subwoofer presents either a 1 or a 4 ohm load to the amp. Since most amps are not 1 ohm stable, we use the 4 ohm method. This means that you need to find an amp that outputs something around 500 watts at 4 ohms. The...

I would get a totally different amp for two of those Rockford Fosgate subwoofers. I would get two of the dual 2 ohm voice coil subwoofers and then the Kenwood KAC-8103D amp is an excellent choice.

ok im going to be replacing my subs. i want to do 2 12 inch sub and i wana spend around $150 on them. im going to make a costum box for them. also i was wondering if anyone has any esperience with using either 12inch versus 15inch subs

I have a 10" sub and I need a box that will fit under my seat... A 12" deep space with 6" from the seat to the floor narrowing down to 3" as it gets deeper... I want it to fit perfectly under the seat without having any of it stick out...