Question about Mmats SQ-2150 Car Audio Amplifier

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Diferent sound my friend had 2 class d 1000w on a chevy suburban,he had 4 12" sub on each amp and sound laud, but he sold 1 amp with 3 subs and the guy who buy it he put a radio,that amp with 3 subs and extra battery on the acura and the sound was a lot less, what he did wrong? or what he need to do to get better sound? i know that 2 class d on a chevy sound better but it not even 1/2 of the sound on the acura....

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Re: diferent sound

The entire difference may be due to the vehicle.

He could check things like the B+ reaching the amps when driven hard. It should remain well above 12v. If it's dropping below 12v, that could be part of the problem.

He also needs to check to make sure that all woofers are in phase. If he has one woofer connected improperly, it would only be approximately as loud as one woofer because one would be cancelling another out.

Posted on Dec 22, 2007

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I had 3 subs hooked up to my pdx 1 1000 and it stopped playing one day and hasnt played since

1. check your B+ wire and make sure the fuse is good, and your ground wire and are you certain that the remote turn on is good?
2. If you have 3 subs runninng on the amp i hope those subs are 8ohms and you wired them in parelell to give an impedance of 2ohms. Let me know. Mark @ Sounds Good to Me.. tempe, az

Mar 18, 2009 | Alpine PDX-1.1000 1000W x 1 Car Amplifier...

1 Answer

Rockford Fosgate P250.2 - No Power

1. no all amps can go bad with a bad installer !
2. repairs sometimes go for as much as it was new! so somettimes not worth it!
3.1 12 4ohm would sound lot better i reccomed mono amps for subs being they only put out low feqz and are better and more battery effient!

Feb 21, 2009 | Car Amplifiers

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2 svcs

You've pretty much hit the nail on the head. Two 2 ohm subs in parallel would give you 1 ohm, and two 2 ohm subs in series would give you 4 ohms. 1 ohm would be overloading the amp but 4 ohms is slightly "underloading" the amp.

Your best solution with the gear you have (i.e. not buying new subs or a new amp) is to put the subs in series (4 ohms). True, you'll be putting about 200W into each sub, but according to page 4 of the owner's manual for the subs, 200W is just a tad under the optimum level recommended for the sub anyway.

Jun 19, 2008 | Alpine PDX-1.1000 1000W x 1 Car Amplifier...

2 Answers

Bass sounds flat when volume is increased

probably your power is too short, increase your gauge wire, and your ground wire of the amplifier has to be shortly as possible, and the positive has to be enough to support peak power, you can also put a big capacitor on the positive wire to give some more power while the bass peak.

Apr 26, 2008 | Earthquake Sound PH-D2 Car Audio Amplifier

2 Answers

Dual voice coil wiring to class d amp

The easiest way to think of wiring voice coils and subs is this:
  • Two items of the same impedance in parallel = Half of the impedance
    • 4 ohms in parallel with 4 ohms = 2 ohms
    • 8 ohms in parallel with 8 ohms = 4 ohms
  • Two items of the same impedance in series = Double the impedance
    • 4 ohms in series with 4 ohms = 8 ohms
    • 8 ohms in series with 8 ohms = 16 ohms
In this case, you want to wire two subs, each with dual 4 ohms voice coils, so that the total equals 2 ohms. Your options are:
  • DVCs in parallel, 2 subs in series = 4 ohms
  • DVCs in series, 2 subs in parallel = 4 ohms
  • DVCs in parallel, 1 sub = 2 ohms
With two, dual 4 ohm subs, you can only have 1 ohm or 4 ohm total impedance.

Mar 16, 2008 | Car Amplifiers

1 Answer

Amp and sub connection

Too many problems, lol. One at a time. I lost you in your post, run by me again but one amp at a time.

Jan 08, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

1 Answer

Sub power hadling capacity

Yes. If the rated power is 380W and the Max power is 1000W then it will handle it. Subs fry when clipping occurs. Clipping is when the amplifier is pushed past its capabilities and the output to the sub gets "dirty". The better quality the amp, the safer it will be on your speakers. It is also important to remember that the gain control on the amplifier is NOT a volume control to boot the sound, it is only to match the output from the headunit to the input handling of the amp. Cranking the gain up too much WILL CAUSE CLIPPING.

Jan 04, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

1 Answer

Alpine pdx 1.1000 amp

These subs are dual voice coil I'm sure...make sure they are putting a 2 ohm load on the amp total, and also set your gain and frequency setting right. Set the frequency around 85 or 90, make sure the lo pass filter is on. Turn the gain ALL the way down and turn your stereo to the point right before your speakers distort....then slowly increase the gain until the subs are playing at full volume. This should not even be close to all the way up, and the subs should sound accurate and bold. Turning them past this point will cause distortion, in which case you should back off the gain a bit. Distortion causes power to cycle through the amp very rapidly and can cause blown subs and blown fuses. If you do not know how to wire both subs for a combined load of 2 ohms, please let me know what type of subs you have.

Aug 05, 2007 | Alpine PDX-1.1000 1000W x 1 Car Amplifier...

1 Answer

Alpine amp and subs questions

it will depend on how you use the 2 alpine subs,, do you know what there individual impedance is [ ohms ] and how you intend on wiring them,,,in series, in parallel, in any case you must maintain the min load in order to load the amplifier properly,,,otherwise the amplifier will operate improperly and allow DC [ direct current ] to pass and fry your what I really need is more in formation

Jul 15, 2007 | Alpine PDX-1.1000 1000W x 1 Car Amplifier...

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