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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What box should i use for alpine swr-12d2


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Car subwoofer just past half volume cuts off the amp


Assuming there is no short, or lose ground wire somewhere inside the box, diodes( in the amp) are fine, you might be overheating it by not allowing it to get good ventilation. This can be a big deal on some low end Chinese amps. Or the speakers are blown , or your Resistors (in the amp) are bad, but for arguments sake.
Most people don't use the proper size and or conductivity types of wiring, for pushing high amperage Think about it like this, Watts (power) =.Amps (energy) x Voltage (pressure) Resistance or Ohm's (amount) determines how much Wattage will go in or out, Ohms = Volts x2 / Watts.
What gauge wire are you using on your setup?

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I own a hk 12x2 and put it in a 2 cube inch sealed enclosure. will it sound better in a ported or bandbass


ported is the loudest your going to get as you get sound from the front and the rear of the sub compared to hearing only one side in a sealed or bandpass box.Bandpass boxes are very loud near there tuning frequency but tend to sound offish at tones that aren't near the tuning frequency. The same with ported boxes and the bass will tend to be a little sloppier compared to the tight bass of a sealed enclosure- it comes down to your musical preferences- more sound at the cost of clarity and loss of power handling capability or tighter cleaner bass with added power handling.

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I HAVE TWO 15" MEMPHIS SUBS AND A POWER ACOUSTIK 1440 AMP. I AM PUTTING THEM IN MY 2002 SUBURBAN, WHAT IS THE BEST BOX TO USE? PORTED OR VENTED


that mainly depends on the type of music you will be listening to. If you need clean, punchy bass, use a sealed box. For more growl, and louder bass, use a tube ported or slot ported box. I would not recommend a bandpass box for 15"s but they do make them. I have 2 kenwood 12"s in seperate slot ported boxes with a SPL 1500 watt amp, making about 149Db in a 93 Eclipse. Let me know if this helps :)

Jun 15, 2009 | Lanzar OPTI1222D Car Subwoofer

1 Answer

Box recomendations


It depends on the size of the subs- 8z 10z 12z 15z? whether or not you port the box is up to you- a ported box is generally louder than a sealed box -as you are coupling and tuning the sound from the rear of the driver with the sound generated from the front of the sub- but the box is also generally larger as well.Then aside from your preference of ported/sealed you have to account for the recommendations of the manufacturer as to whether the sub/speakers are meant to be placed in a ported or sealed enclosure. Most 10 inch subs do well in a box that yields .75 cubic feet to1.0 cubic feet.most 12z do well in 1.0 cu feet to 1.5 subic feet and 15z do well in 1.5 to 2.5 cubic feet. I have a set of 15z that require 4.25 cubic feet per sub-so its important to look into the manufacturers recommendations. The easiest box to make would be a sealed enclosure-and the sound quality generally yields a tighter more accurate bass sound along with increased power handling capability- try going to rockford fosgate .com and look into the woofer box wizard its a program that calculates air space for whatever size box you have room for-hope that helps you-good luck

May 11, 2009 | Car Audio & Video

1 Answer

Choice of speaker box


If you're looking for SPL (LOUD) go vented.
If you're looking for tonal accuracy (Sound Quality) go sealed.

The tradeoff between the two is that a ported enclosure will allow your subs to play highly powered. More air flow - better cooling of the voicecoils.

Sealed enclosures dont like much power because the coil cannot breathe and heats up rather quickly.

Its up to you, and your listening type.
Just remember LOUD = PORTED
QUALITY = SEALED

Bandpass is kind of a mixture of the two, however you give up some of the frequency range the sub plays at - and I dont ever recommend a bandpass enclosure to my customers unless they are looking to be flashy and light up the cones or magnet assemblies.

There are advantages and disadvantages to every enclosure type.
Pick the one that best suits your taste, and be sure to fire it toward the rear of the vehicle for the best response and cabin gain.

Thanks for using FixYa - a FixYa rating is appreciated!!

Feb 24, 2009 | Pioneer C-Type TS-W306DVC Car Subwoofer

1 Answer

Finding a good box for the sub


< I design sub enclosures for a living so you are in luck. > The one thing to remember is that generic sub boxes are just that - generic. Even if they have a fancy brand name, unless they are built for the sub you are using you will be making a guess as to how well it works. Don't get me wrong though it may work well in that band pass box, but just imagine how much better it could sound in a custom enclosure. Having said that you have the right idea, and bandpass enclosures can be power-full. If you send me (dynami28@charter.net)
the specs that came with the sub I can give you an idea of what kind of box you should get or, if you want to build your own, I can do the specs on that too. Personally I stay away from bandpass enclosures for one reason. When the subs distorts or gets pushed too hard you can't hear it happening. Since the sub is completely enclosed it's somewhat muffled or insulated so that distortion is hard to hear, which can blow up subs. A good ported enclosure would do well and basic plans should be on Lanzar's website, or available from myself. I do not recommend a sealed enclosure unless these subs will see light duty and you don't expect ground shaking bass. They can sound okay in a sealed box but most car audio enthusiasts like the ported boxes for their increased output and lower tones. Email me if you can't find the specs on those subs I might still have them on file. (Also the enclosure should be at least 3/4" thick MDF with bracing throughout.)
-Dynami

Dec 23, 2008 | Lanzar (Pair) MAXP104D Max Pro Series...

1 Answer

Wiring


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:
  • The dual voice coils of each sub are in parallel (+'s together, -'s together). This makes each sub 2 ohms.
  • 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.

Let me know if you need any more help!

Mar 19, 2008 | Lanzar Vibe 218 Car Audio Amplifier

1 Answer

Optimum sound performance needed


1) legacy products are highly overrated and i have never seen one put out the power it claims
2) if you are running the amp bridged, you need to match the impedance of the speakers to the amps highest output impedance, otherwise your system will not sound all that great...

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)?

if you give me the model number of your speakers and your amplifier i can probably help you more, but with the information you have provided, this is all i can offer..

hope it helps,
trin

Nov 11, 2007 | Legacy - American II: 2 Channel 2000W...

1 Answer

What is the sub box size i should use??


That depends on what you are looking for Sealed or ported the formula to figure our Cub foot size is LxWxH \ 1728 This will produce a number such as .823863896928365489236489623984823748923749 .8 is the cubic foot of the box. U might have to see what you want, Bandpass has deeper smoother bass -=to me=- but cant be heard as far away but sounds better in the car. Sealed will hit harder, sound kind of punchy but will be able to be heard down the block by the 15 year old who will pop your trunk lock in a heartbeat.

Jan 30, 2007 | Rockbox RBX-125W Car Subwoofer

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