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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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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Posted on Jan 02, 2017

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2 NTX-6812's. need box and amp.


if your subs are dvc 1000w max and 500rms wiring up to a 1 ohm load you would need a 1000w max 1 ohm stable amp. to put this in a pickup truck, i would not put them in a box, i would get 2 12inch tubes to put them in. cause a wedge truck box would make your system sound like garbage and will be distorted, your sql will be poor, basically you would need the right amount of air space for the subs.

Feb 10, 2010 | DHD NTX-6812 Car Subwoofer

1 Answer

Subwoofer buldging out problem


When speakers are wired in the wrong way the will do the "pushing out" you're describing. Basically the polarities have been reversed and if kept like this over a period of time will blow the speaker. Best thing to do is to disconnect the power by the negative on the amp and take out the fuse from the power supply. Check the wires running from the amp to the subs, negative to negative and positive to positive. I know it sounds basic but many people do mix it up! I would also check to see what channels the subs have been wired into?

Best way is to have one sub from channel 1 and the other sub from channel 2 for example. Or if its a bridged 4 channel amp, have 1 sub running from channel 1&2, and the second sub running from channel 3&4 still making sure of the polarities. Again this all depending what kind of amp and sub you have.

-----------------------------
For example;
A 4 channel (bridged) 1000W amp. 250W max per channel or 500W per 2 channels! So if you have 2 500W subs, by connecting one to a single channel will decrease subs ability due to the lack of power supplied. However by combining 2 channels you optimize the output!
---------------------------

Once you know all your wiring from your amp to subs are ok/good connections/good wires etc you shouldnt have to "wiggle the wires" to get it to work as this is just a bad connection. Also ensure that no 2 wires are touching. Make sure that the master volume on the amp is turned down. You dont need this to be on loud at all, in fact far from it or you'll risk damaging both the amp and subs!

Hope this helps!

May 27, 2009 | Car Audio & Video

1 Answer

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

Knocking noise with my kicker compvr 15"


comp VR 15s are rated @ 500W RMS 1000Peak.
The lanzar vibe amplifier is 2 x 600W RMS at 4 OHMS 2 x 1200W MAX at 4 OHMS 1 x 2400W MAX at 4 OHMS Bridged 2 x 1000W at 2 OHMS RMS.
Your subs are single 4 ohm subs.
If your subs are wired stereo, they both are seeing 600W. (more than the rated RMS)
Chances are, you have them wired parallel to a 2 ohm mono load - of which that amplifier is not rated. In theory, it will produce about 2000W @ 2 ohm mono for a short period of time.
Your amplifier is too powerful for your subs. Turn down the gain setting to 3/4 or purchase better subs. Also be sur the subs are inthe proper enclosure. It sounds as if they are excurting past their linear x-max and colliding with the rear bump plate. This will cause damage down the road if left as is.

Nov 26, 2008 | Kicker CompVR 05CVR84 Car Subwoofer

1 Answer

Help needed


Maybe, but my question would be will the truck alternator carry the load without frying. Also you will need one hell-a-chous size of battery and ground leads in order to feed that much power from the front of the truck to the amps in the trailer in back. I would think that some really big boost capacitors placed at the amps would be in order too. Also, you didn't mention how many amps you were using and what amperage they would draw. That is criticial information before you can figure out every thing else. Good luck.

Nov 21, 2008 | Kenwood 1000W Class D Bridgeable Mono...

1 Answer

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

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 Audio & Video

1 Answer

Wiring my kicker solo-baric 15's


The best you can do is connect the dual 2 ohm voice coils of each respective sub in series (4 ohms total per sub) and then connect each sub to one channel of the amp. This will give each sub 1000W, which is the rated maximum from Kicker.

Mar 13, 2008 | Kicker Solo-Baric L7 S15L72 Car Subwoofer

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

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