Question about Soundstorm Force F2800 Car Audio Amplifier

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Soundstorm amp what size box should i use to get the most sound and power? sloted or tuned port bandpass or sealed? how should i wire the subs? should i bridge the amd or leave it two channels? and damn i couldnt find that **** anywhere thanks

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Your D-SERIES amplifier was designed to operate efficiently at loads down to 2 Ohms.
This means that you can install four 8 Ohm speakers per channel when using parallel wiring.
of an additional 10W to each speaker.
Please note: The gain control of any car audio amplifier should not be mistaken for a volume
control. It is a sophisticated device, designed to match the output level of your audio source unit to
the input level of the amplifier . Do not adjust this input level to maximum unless your input level
requires it. Ignoring these instructions will result in an input overload to the amplifier, and excessive
2 Ohm Operation
front panel will be illuminated, indicating the amplifier has gone into a self-preservation mode.
these conditions before attempting to power up the amplifier again.
When operating at 2 Ohms, the amplifiers will increase their output power by approximately 50%. The
current draw will so increase by about the same amount, also be sure you have enough current to
run the amplifiers into a 2 Ohm load. If you lack adequate current, your music reproduction will be
distorted.
Increasing the number of woofers per channel at low frequencies (up to 100MHz) produces an acoustic
coupling effect. This acoustic coupling increases your power output by 3 dB per speaker, or the equivalent
audio distortion. It can also cause the protection circuit to engage.

Posted on Jan 07, 2009

  • blueextc3221
    blueextc3221 Jan 07, 2009

    Your amplifier is 2 ohm stereo stable. The most efficient and powerful configuration is to bridge your amplifier at 4 ohms however.

    You will need (1) single 4 ohm voicecoil subwoofer, (2) dual 4 ohm subwoofers, or (1) Dual 2 ohm voicecoil subwoofer, or (1) quad 1 ohm subwoofer.

    Generally a single GOOD subwoofer will be louder due to workmanship and materials than 2 poor quality cheap ones.

    To get the most of your subs, you will want to put it/them in the largest vented (ported) enclosure the manufacturer recommends. Slot ported enclosures tend to be louder near the tuning frequency of the enclosure due to port noise cancellation. Since you are going for "loud" ported is the way to go.

    Get the best speaker you are able to afford, and make sure it has the correct Wattage rating and voicecoil configuration to get the most output from the amplifier.

    If you would like opinions on what subs you have available to you, write back.

    Good Luck

    BTW...

    heres a link to your owners manual.

    http://dl.owneriq.net/b/baa135f3-7f71-49...

  • blueextc3221
    blueextc3221 Jan 07, 2009

    Where it says 2 OHM OPERATION didnt cut& paste properly. It is directly from the manual. Please see the entire wording there on page 5.

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Look into the Alpine MRP-M1000. RMS = 1kW into 2ohms (600 into 4ohms), YES 4 OHMS(!), real power. No, it WON'T do one ohm. But most of those claiming to are not CEA2006 compliant anyway and can claim any power at any load and advertise for whatever buyers they can attract for their bottom-of-the-barrel products.

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Hello pelikant75,

The best answer depends on your budget for the sub(s) and exactly what kind of sound you are looking to get. Your amps RMS output at 4 ohms is 200 watts and at 2 ohms, it's 400 watts. I could not find that it was 1 ohm stable.

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If you want a little better SQ, a pair of Rockford-Fosgate P1S410's should be considered. Again, going to Crutchfield, they currently have this one "BOGO" (buy one get one) for $99.99. You will have to provide your own box, though, no free one with these.

Finally, if you want the best SQ, and your budget allows, consider a set of Alpine SWR-1022D's for $179.99 each. These have dual 2 ohm voice coils, allowing you to series the coils and parallel the subs, resulting in a 2 ohm load to you amp just like the MTX's and RF's recommended above. You will probably want a somewhat larger enclosure for the Alpines as well as a fatter wallet. Your amp is right at the lower end for powering them, so they probably will not be as loud. But they will sound good.

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In all reality, that amp is probably a bit small for those two subs. To maximize the power from the amp to the subs, make sure:
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  • Connect the subs in series (+ to -). This makes the combination of subs together 4 ohms.
  • Bridge the 2 channels of the amp to the subs in series (see above).
This will put somewhere between 150-200W to each sub.

Keep in mind, though, that depending on the music type and location in the vehicle, the type and size of the sub box is going to make almost as much difference as how much power is on the subs. Sealed boxes are usually small and have a nice flat response, but tend to need more power to sound louder. Ported and bandpass boxes are larger and aren't as flat of a response, but have nice loud peak at a certain frequency.

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what size fuse or fuses does your amp use? what size wire did you install with (power and ground)? did you connect direct to battery or did you connect to a fuse block or similar? did you use a stiffening capacitor? does it sound like it is clipping when you turn it up or is it just distorted? what kind of box are you using for the speakers (ported, vented, sealed, bandpass)?

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