What size amps should I get for a 15-inch subwoofer?
The most important part of this question is that it’s a subwoofer. You don’t need a lot of power to move a lot of air with a 15″, but it also depends on your subwoofer’s frequency response, and your required frequency response.In a sealed box, the woofer will roll off I think at -6dB per octave, while in a ported box, it will roll off much steeper. However, if it is a ported box, you don’t want to push the woofer hard below the box frequency. In this case, enough power is what you need. Average power will likely be 10 W or so, but when the large transients hit, you don’t want distortion, so for 15″, I would guess you’re looking for high SPL, so I would recommend no less than 200 W (quoted RMS amplifier rating).For a sealed enclosure, things become interesting. You can compensate the roll-off below the woofer’s low frequency response using a simple 2nd order low-pass filter on the input. So your LPF will have a -3dB frequency of, say, 2 octaves below Fb of the woofer (the woofer’s -3dB frequency on the low side). For example, if your woofer goes down to 40 Hz (-3dB), you can make a LPF at 10 Hz (-3dB). This will compensate the woofer, but you then need a lot more power, and the woofer driver needs to be able to handle that power. The further your filter frequency from your woofer frequency, the more power you need, but the lower (frequency) your response will be.To illustrate:As you can see, the -3dB frequency response of the woofer with the filter is 10 Hz, and it will respond down to about 5.5 Hz. But you need a huge amount more power (roughly 30 times more). For reasonable output, you need 16 W for a 93 dB sensitivity woofer (let’s assume sensitivity is accurately measured at 1 W). For the same power with the above filter, you therefore need 480 W. So there’s your answer - for a sealed woofer box with a -3 dB low frequency of 40 Hz, if you compensate this to respond as above, and the woofer can handle it, you need a 500 W amplifier. :) And know something for sure - that woofer excursion is going to be something crazy! And if it can manage the excursion and power, you’ll have one very thunderous woofer!Verdict: 200 - 500 W
What size amp do i need for 2 Kicker CVR 12's?
i use to have this set up and i only had a cheep 900watt kenwood that was pushsing them hard with the amp turned 1/2 way up....
If I have two 400 watt RMS subwoofers what size amp do I need? How can you tell?
Probably 800 watts at half the rated ohms of one speaker. Your amp must be able to push 800 watts at, say, 2 ohms if these are 4 ohm speakers or 800 watts at 4 ohms if these are 8 ohm speakers.It will say on the speakers what the impedance in ohms is.Get an amp that is specified with 800 watts or over, at an ohm rating that is SAME or UNDER…half the ohm rating of one of those speakers.That's the answer here's a short ramble:Almost inevitably you will be running the two speakers in parallel. Whether you have two outputs on your power amplifier; or if you go into one speaker then go out from that speaker to the next; the connection you don't see inside the speaker with in and out or inside the amp is a parallel connection. Parallel connections divide the impedance (ohms.) It takes a bigger amp to handle lower impedance, because lower impedance is lower AC resistance. Lower resistance means more amps flowing for the same output voltage. More amps requires a beefier output section. The actual equation for total speaker ohms of speakers wired in parallel is:Total ohms = 1/((1/ohms#1)+(1/ohms#2))…If you put in a third speaker there would be another similar term in the denominator, (1/ohms of speaker #3). More speakers, lower ohms…The amp will say what the watts and ohms are on the back, or at least in the manual it will tell you what it can handle. Be at or below the ohms, and above the watts.
I have two 12 inch kenwood subs what size amp?
they are probably 800 watts, but they are prob rated around 350 or 400 RMS. 800 watts is just its max. they would regularly play at about 400. any amp you can find close to 800 should be fine. 1000 may be too much, which could over power your subs and cause them to break. the key, is to find amps and subs that have about the same ratings(RMS). the closer, the better they sound, and the clearer it will be.
What size amp do I need to power two 12 inch kicker comp 05C124?
Those are SVC 4-ohm subs, rated at 150 RMS. Always go by RMS and ignore peak. You need an amp rated at 300x1@2-ohms. Wire the subs in parallel, + to + and - to -. A Kicker ZX300.1 is perfect for you. Added: Parrots, you put way too much in your answers. That is above most of these peoples heads. I try to keep mu answers short, to the point, and give the info they need.
What size amp do i need for 2 12'' pioneer sub-woofers ( TS-W308D4 )?
the size of the amp depends on how they are wired to the amp (the final impedance also known as ohms) the lower the final impedance (ohms) at the amp the lower the sound quality but the easier/cheaper it is to power-- most CEA-compliant brand amps are not stable below 2ohms so they will run hot, go into protection mode and sound distorted if the amp is stable at 1ohm it will say so make sure the amp is CEA-compliant which means that the amps have been tested and produce or exceed the advertised RMS wattage with minimum distortion (distortion is the main cause of speaker damage over time) so the amp needed should have about 800watts RMS total (use a mono/block {1-channel} amp) at your desired final impedance and be CEA-compliant If you send too much power to your sub, you risk damaging it. The cone of the speaker and the mechanical parts that make it move may break under the stress. Surprisingly, too little power can also damage your subwoofer — in fact, it's actually more common than damage caused by overpowering. When the volume is turned up and the amp doesn't have enough power, the signal becomes distorted, or "clipped." This distorted signal can cause parts of the speaker to overheat, warp and melt. Not good! You don't have to match speaker and amp wattages exactly. An amp with a higher output than the speaker's rating won't necessarily damage the speaker — just turn the amp down a bit if you hear distortion from the sub and don't run the speaker at extremely loud volumes for lengthy periods. Likewise, you'll be OK with a lower powered amp if you keep the volume down and don't feed a distorted signal to the sub you will send the amp into clipping Clipping Clipping occurs when an amplifier is asked to deliver more current to a speaker than the amp is capable of doing. When an amplifier clips, it literally cuts off the tops and bottoms of the musical waveforms that it's trying to reproduce, thus the term. This introduces a huge amount of distortion into the output signal. Clipping can be heard as a crunching sound on musical peaks. that causes distorted sound which will damage your subs over time here are the top CEA-compliant brands Alpine Bazooka Blaupunkt Clarion Infinity JBL JL Audio JVC Kenwood Kicker MTX Orion Pioneer Polk Audio Rockford Fosgate Sony
What size amp do you reconmend for two 12" 750watt subwoofers?
A 300 watt RMS @ 2 ohm amp would be fine with the subs wired like so http://i81.photobucket.com/albums/j230/sparky3489/PARALLEL.jpg Be sure the amp is CEA-2006 compliant. See my site for more info http://spkrbox1.spaces.live.com _________________ RMS (root mean square) watts is a more accurate means of measuring power as opposed to max power. The reason is that an amp rarely ever reaches max, and when it does it's only for about 1/10 of a second. RMS is the nominal (average) watts an amp can push or what a sub can handle. When subs are wired together, the watts RMS of both subs gets added together as well as the impedance (ohms) changes as well. Two 4 ohm subs wired as in the link above provides a 2 ohm load to the amp. So an amp that matches the total watts RMSa nd the new load is ideal. This is why the 300 watts RMS 2 2 ohms.
What size amp do i need for two 12" mtx thunder 4500 subs?
don't listen to them. yes you're fine. infact double what you need. you can't even run that amp at its peak. the subs are rated at 225w RMS a piece. especially don't listen to the last guy. 9000 watts would launch the coils through your trunk windshield whatever you have your subs facing the coils would go through it haha.
What size memphis amp do i need for 2 memphis mojo 12's? Does it need to be 2 channel?
Ok well 1st no you dont need 2 amps, you'll do fine with one good one. 2nd i dont know what kind of vehicle you have but it wouldnt hurt to use a cap. although i dont think you'll need it if its going in a truck or car with a decent size engine. 3rd i looked up the subs and they are dual 2 ohms so you have 3 wiring options, 1/2 ohm, 2 ohms or 8 ohms. this link will show you actuall pics of what i mean. http://www.the12volt.com/caraudio/woofer_configurations.asp?Q=2&I=22 so about the amp....no you dont need 2ch, you should get one thats 1ch or can bridge to 1ch and can handle a 2 ohm load(thats your best bet cuz 1/2 will need a lot of power and your subs won't last even a year or so and 8 ohms isn't going to give you a deep bass) also it should have a rms between 1000 and 2000 but no less then 1000 cuz thats what the sub's rms is. i think thats it, i hope i helped. good luck!
What size amp do i need for 2 12" sony xplod subwoofers (SON XSL124P5B)?
you go by rms. for these i would go with: Kicker ZX-750.1 Mono Channel Amplifier Details: RMS Power: 750W x 1 @ 2 ohms RMS Power: 375W x 1 @ 4 ohms THD at 4-Ohm RMS Power: <1 % Speaker Level Inputs Preamp Outputs LP Built-In Crossovers Bass Boost: 0 - 18 dB Frequency Response: 25-200Hz Signal to Noise Ratio: 62 dB Advanced chassis with extruded aluminum heatsink Efficient class D circuitry Top-mounted controls KickBass 0-18 dB variable bass boost at 40 Hz Variable 50-200 Hz low-pass crossover with 24 dB/octave slope Defeatable 25 Hz subsonic filter High level or low level inputs (125mV-10V) PreAmp Signal Transfer (PAST) RCA outputs Delayed turn-off logic circuit Soft start turn-on circuit for reduced startup load Short circuit, Over-voltage, Reverse polarity, Thermal overload (SORT) protection Included remote KickBass control Fully CEA-2006 compliant specifications for real-world power here is a link: http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=16918