Question about Alpine MRD-M1000 Car Audio Amplifier

1 Answer

Amp output I have 3 type-R 12" subs. They are the 4 + 4 versions, so the coils are in series and then each sub paralleled for a 2.67 ohm load. They are hooked up to a MRD-M1000 amp. IS there anything wrong with this setup? I was unpleasantly suprised with the output of this system. Also...during a road trip the system gets noticably louder after about 2 hrs. -Thanks.

Posted by Jim Slattery on

Ad

1 Answer

Mike Duncan

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 219 Answers

If you are hooking up the speakers in a bridged configuration to the amp then you are forcing your amp to drive a 1 ohm load on each channel. If your amp is not capable of driving a 1 ohm load then you will fry your amp. It may take a month or two, but it will fry it. How does it feel temperature wise? If you cannot place your hand firmly on any part of the amp and hold it there all day long, then it is running too hot. Good luck. Hope this helps.

Posted on Apr 04, 2007

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have 2 2 ohm dvc alpine type r 12 inch subs. Each voice coil on both subs reads 2.5 on ohm meter. I need wireing diagram to hook up to a boss 2500 class a/b amp at 2 ohm


To have 2x 2 ohm subs wired up, they either need to be wired in series or in parallel. In series, they will total as a 4 ohm load to the amp (or 5 ohms if 2.5 each) and in parallel, they will be 1 ohm (may be closer 1.25 ohms I think).
If this is a mono block (single channel) amp, I can't see that you will be able to wire them for a 2 ohm loan. You may have to wire them in series to be a 4/5 ohm total as the amp probably won't be 1/1.25 ohm stable.

Apr 27, 2017 | Alpine Car Audio & Video

1 Answer

2 dvcoil 4ohm.subs, need 2 ohm load total for monoblok.amp. how do I wire.it


If you run one sub with the DVCs in parallel, you would get 2 ohms. If you run both subs with all DVCs in parallel, you would get 1 ohm.
If you run both subs with DVCs in parallel and subs in series, you would get 4 ohms.
If you run both subs with DVCs in series and subs in parallel, you would get 4 ohms.
If you run one sub DVCs in series and the other sub DVCs in parallel and both subs in parallel, you would get 1.6 ohms but the subs would not be balanced.
If you run both subs on only one coil and the subs in parallel, you would get 2 ohms (but only if the individual coils are rated for the full power)

Oct 15, 2015 | Ohm Car Audio & Video

1 Answer

I have 2 10" Kicker Comp Subs


That amplifier is only rated at 150 watts at 4 ohms, or 300 watts at 2 ohms. Not a very strong amp to run 2 kicker comps. My guess is you have the subs wired wrong for your application. There are 2 types of subs, one is a dual 4 ohm, and one is a dual 2 ohm. Most people bridge these coils together and that cuts your ohms in half. For example. Lets say you have the 10cvr104 subs. Thats the dual 4 ohm sub. You wire the coils together in parallel, now its a 2 ohm sub. You have 2 of these subs running off of your amp, if they are hooked up in parallel, now you have a 1 ohm load, out of the amplifiers normal operation. Your amplifiers internals heat up really quick and there is a thermal overload, putting your amplifier into circuit protection mode. My suggestion for wiring your subs is as follows: for each speaker, wire the coils together like this- positive coil1 to negative coil 2 and negative coil 1 to positive coil 2. That is called running in series, and doubles your ohm load. Next, we need to wire the speakers together properly to hook up to your amplifier. For this, since the coils are hooked together, you only need to use one set of terminals from each sub. And take the positive from sub 1 and hook it to positive of amp. Take negative sub 1 and hook it to positive of sub 2. Take negative of sub 2 and hook it to negative of amp.

Aug 30, 2012 | Rockford Fosgate Punch 301M Car Audio...

1 Answer

How do i wire mtx 9500 subs 2 10'' down to a one ohm


THE T9510-04 SUBS ARE SINGLE COIL SUBS AND YOU CAN VIEW THAT WIRING DIAGRAM AT THE FOLLOWING LINK:
http://www.mtx.com/caraudio/products/subwoofers/TechData_T9510-04.pdf

THE T9510-44 SUBS ARE DUAL VOICE-COIL SUBS AND YOU CAN VIEW THAT WIRING DIAGRAM AT THE FOLLOWING LINK:
http://www.mtx.com/caraudio/products/subwoofers/TechData_T9510-44.pdf

SINCE YOU NEED A 1 OHM LOAD, I PRESUME BRIDGED AND ARE USING TWO SUBS, THEN HOPEFULLY YOU HAVE THE DUAL VOICE COIL TYPE, AS THEY ARE DUAL 4 OHM AND YOU WILL HAVE TO CONNECT THE VOICE-COILS IN PARALLEL WHICH WILL MAKE EACH SPEAKER A 2 OHM SPEAKER AND THEN CONNECT THE TWO SPEAKERS THEMSELVES IN PARALLEL AND THIS WILL PROVIDE YOU THE 1 OHM LOAD. IF YOU IN FACT HAVE THE SINGLE 4 OHM VOICE COIL VERSION, THEN IT WILL ONLY PARALLEL THE PAIR DOWN TO 2 OHMS. OK. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

Jan 08, 2010 | MTX T9510-44 - 10" 9500 Thunder Series...

2 Answers

I have an Audiobahn A8000T amp and 2 12" Kicker CVR (DVC) Dual voice Coil. The Subwoofers are 2OHM a peice. What is the best way to hook this all up to run a 2 OHM load to my subs?


This is a link to Kicker for your CVR12 Subs...if you have the 2 ohm version (2 ohms per voice coil) and you have 2 speakers ....you will need to wire EACH speakers voice coils in series to get 4 ohms from each speaker and then wire the 2 speakers in parallel.....as in....2 ohms in series with 2 ohms = 4 ohms....both speakers wired same way, then in Parallel with each other = 2 ohm load. Page 2 of this link gives examples of both series and parallel wiring of your speaker.
http://www.kicker.com/sites/default/files/2006CompVX.pdf
If you are still not sure as to my description of ' How To',
PLEASE respond and I will attempt to explain it EXACTLY via wiring directions.

Nov 18, 2009 | Kicker CVR12 Car Subwoofer

1 Answer

Why does the kenwood kac-9103d has two sets of terminals if its a one channel amp so how do i hook up a dual 12 phoniex gold 1200 watt sub to it


Hello damasogrizzl,

The 2 sets of terminals are connected internally. Having 2 sets just makes it more convenient when wiring multiple subs. The amp is rated for 900 watts RMS into a 2 ohm load. The specs claim that it is stable at 1 ohm but does not give a power rating.

The Radial SD competition series from Phoenix Gold are rated to handle up to 600 watts RMS. If you have the model RSdC124 with dual 4 ohm voice coils, it would be best to wire the voice coils in parallel for a 2 ohm load and connect the sub to one set of terminals on the amp. If your sub is the model RSdC122 with dual 2 ohm voice coils, you should wire the voice coils is series for a 4 ohm load and connect the sug to one set of terminals on the amp. Wiring the voice coils in parallel will result in a 1 ohm load. And, while the amp may be stable at 1 ohm, the sub will be seriously overpowered.

Hope this helps.

Sep 23, 2009 | Kenwood KAC-9103D Car Audio Amplifier

1 Answer

Good price


Hello smoot_dog,

Well, you did not specify whether you have the 2 ohm or the 4 ohm versions of the L7 and that will impact your choice of amps. But with 8 voice coils and 4 subs to work with, you certainly have lots or potential configurations.

If your subs are the 4-ohm version, I would recommend the Alpine MRP-M1000. Currently it is on sale at www.crutchfield.com for $347.00. With this amp you'd wire the voice coils in parallel (2 ohms), wire each of the 2 pair of subs in series (4 ohms), and the resulting pairs parallel to the amp for a final load of 2 ohms.

If your subs are the 2-ohm version, I would recommend the Rockford-Fosgate Punch P1000-1bd which is stable at 1 ohm. Crutchfield sells it for $349.99. With the Punch and 2-ohm voice coils, you'd series the voice coils (4 ohms), parallel each pair of subs (2 ohms), and then parallel the resulting pairs to the amp for a final load of 1 ohm.

Either of these amps will provide an honest 250 watts RMS to each L7. They'll not only rock your vehicle, they'll rock the pavement.

Apr 14, 2009 | Car Audio & Video

1 Answer

Subwoofers pop then immediately produce no sound


Sounds like the two subs wired together might be too much of a load on the amp and it is shutting off. Try wiring the two subs in series. That will reduce the load on the amp but will conversely put out less power. Less is better than none though. In any case check your amp to see what the lowest ohm rating it can see, that ohm rating is where you want your subs and if faced with a choice of either going under (lower numerically) or over (higher numerically) GO OVER!-it is much safer.
Here's an article I wrote that can help explain how to wire the subs to the amp.

OHM LOADS, SUB WIRING, OHM RELATED POWER OUTPUT

SERIES SUBWOOFER WIRING
Wire the positive pole from one voice coil (using wire that is as thick or thicker than your wire from amp to sub) to the negative pole of the other voice coil (on the same sub). This will leave you with a positive pole from one voice coil and a negative pole from the other giving you the two leads that will be hooked up to the amplifier or other subs. When wiring in series, the ohms will go up numerically, and the load on the amp will go down. Almost all amplifiers power output will follow this rule, except some amps such as JL Audio's “Ohm matching” D Class amps.

PARALLEL SUBWOOFER WIRING
Wire the positive pole from one voice coil (using wire that is as thick or thicker than your wire from amp to sub) to the positive pole of the other voice coil (on the same sub). Then wire the negative to the negative in the same way. You can then wire to the amp or other subs. When wiring in parallel the ohms will go down numerically, and the load on the amp will go up. Almost all amplifiers power output will follow this rule, except some amps such as JL Audio's “Ohm matching” D Class amps.

MULTIPLE SUBS USING SERIES AND PARALLEL WIRING
In order to match your amplifiers ohm rating you can use parallel and series wiring together, just keep things even for power distribution and to avoid phase issues.
Example: I have two “Type X 12” subs” that have dual 2ohm voice coils and have to match my “Amplifier X” ohm rating of 2ohms mono. In this case, I would wire each subwoofer in series (giving me a 4ohm load), and then wire the two subs in parallel to get my 2ohm mono load. When wiring multiple subs just, treat each sub as a voice coil and wire accordingly.

POWER OUTPUT AND OHM LOADS
For example if “Amplifier X” can make [email protected], it would make [email protected] and [email protected] However with every drop in ohms the amplifier is put under more pressure. It starts to create a lot of heat, distortion figures begin to climb, damping rates drop, and some amps even throw power spikes when clipping. SO BE SURE TO CHECK YOUR AMPS RATING AND DO NOT EXCEED IT!

-Dynami

Apr 04, 2009 | Alpine Car Audio & Video

1 Answer

Can i wire 3 jbl gto1204d subs into 1 jl audio 500/1 amp


You can connect them in a series/parallel configuration. Put two of them in series and then connect the last one in parallel across the two in series. This would give you an impeadance of around 2.7 ohms. Only do this if your amp is stable at 3 ohms or less. I am not familiar with the specs of your amp. If your amp is only 4 ohm stable you can not do this.
This would also give you half the power on the two subs in series as the power for the one that is parallel. The two in series would be sharing the total output signal, where-as the one in parallel would get the entire output signal from the amp.
if you were to connect a fourth sub woofer in this configuration it could give you a 4 ohm load, by adding the fourth sub in series with the single sub that is in parallel. or in other words, yu have two sets of 2 sub woofers each in series. That gives you two 8 ohm loads (two 4 ohm subs in series is 8 ohms). Then you take the two sets of subs and parallel them (two 8 ohm loads in parallel equals 4 ohms).

If i had a picture to show you it would make sense, two subs in series that are in parallel with two subs in series.

May 12, 2008 | Jl Audio 500/1 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 Audio & Video

Not finding what you are looking for?
Alpine MRD-M1000 Car Audio Amplifier Logo

Related Topics:

69 views

Ask a Question

Usually answered in minutes!

Top Alpine Car Audio & Video Experts

xxxxxx xxx

Level 3 Expert

5023 Answers

The Knight
The Knight

Level 3 Expert

76584 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1189 Answers

Are you an Alpine Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...