Question about Alpine MRD-M605 Car Audio Amplifier

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My car amplifier an alpine unit with a sony music system and speakers starts making a hissing sound in the middle of a track being played what could be the problem

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Are you sure its the amp??? Try runing the cd without the amp and see if the same problem persists

Posted on Sep 07, 2009

Testimonial: "thanx will try and do what u advised"

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Hi im after some help coz driving w/o music is no fun. Just done a sterio system upgrade to my car using mid-high end sony xplod components ie 6x9s in the rear, xm4s amp, 6.5s in the doors new head unit...


Congratulations on your new audio system. I will give you 4 scenarios: 1st. From your head unit, use the Fader to separate the front speakers from the back. (only front speakers playing) now using the balance separate the left from the right so only one speaker is playing. If the sound becomes more bass filled then you have a phasing problems which could cause cut out (protection) issues. Do the same for the back speakers, BOTTOM LINE: make sure that your connections from amplifier to speakers are all correctly connected where they should be.You will know that your speakers are correctly connected when the bass is richer while both speakers are playing as opposed to more bass when only one is playing. 2nd. Your head unit RCA output is of a certain voltage (V) [signal strength]. (1.2V, 2V, 4V, 5V) Lets say that your head unit has a 4V output, To match this up with your amplifier you must adjust the gain control on your amplifier to be at the 4V position. If your voltage output does not match your input voltage and the signal in result that is being sent is too high for the settings on the amplifier, you will over voltage your amplifier making it distort then heat up and most likely start cutting out to protect it self. this could also potentialy damage your speakers. 3rd. Check that the speaker cables are not shorting on metal anywhere, that includes the speaker terminals not touching the frame of the location that they have been installed. 4th. The cable size you are using is not adequate for the power needs of your amp. hope this helps. dreamsystems

Feb 13, 2011 | Sony XM-4S Car Audio Amplifier

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Sony STRDH510 has a hiss coming from the speakers when listening to FM stations, however, there is no hissing sound when watching tv and listening to the sound through the same speakers. Is there an...


This has nothing to do with the speakers.

Page 38 of the manual describes tuner operation. FM hiss usually indicates a weak FM signal or it's not tuned precisely. If the "ST" indicator is blinking and you select Mono does it get any better?

A 75-ohm FM antenna oriented horizontally will help bring in a stronger signal (page 29 and 73).

Dec 08, 2010 | Sony Audio Players & Recorders

1 Answer

Alpine in dash tv issue


this is the problem with the additional battery wiring. use appropriate cutout and do rewiring. make sure the Dynamo has the enough capacity to charge both the batteries. better avoid using your music system till the problem is rectified.

Aug 08, 2009 | Sony Xplod 1100 Watt Max 10" Subwoofer,...

2 Answers

Noise through car speakers when connected to amp


If the subs are making a humming or RPM sound check your ground on the amp , make sure its a good ground. Always run your power wire from battery by itself down one side of vehicle. Groun should be no longer than 2 feet. If that dont help you can buy a noise supresor that goes inbetween your head unit and amp through RCA's with a ground on it . Hope this helps.

Jul 25, 2009 | Alpine MRD-M1000 Car Audio Amplifier

1 Answer

Alpine cde-7872 head unit


they are blown, either have them fixed or buy another head unit or the best way is to just use the RCA outputs from the head unit

May 14, 2009 | Sony Xplod XM-554ZR Car Audio Amplifier

2 Answers

Car amp turned off in middle of play


make sure and check all the fuses including the one under hood also check all wires to see if they are well connected

May 13, 2009 | Alpine MRD-M1000 Car Audio Amplifier

2 Answers

Channel 2 crackles


Make sure your speaker wiring does not come close to the 12v power cable running for your amplifier. If your amplifier's 12v power cable runs on the drivers side of the vehicle, run your speaker cables on the passengers side and make sure your tweeters have a high pass filter to stop any pickup of engine sound (When you are driving you *WILL* notice it at high RPM. a HPF (High Pass Filter) will also stop those nasty hissing sounds on S's.

Feb 11, 2009 | Alpine PDX-4.100 Car Audio Amplifier

1 Answer

Alpine 9885 - no sound with cd's or ipod


have you fixed it yet? if not try this. your car probably has factory amplified speakers. hook up the remote wire AND the power antenna wire to the blue factory amp wire and it should work just fine

Mar 08, 2008 | Alpine CDA-9885 CD Player

1 Answer

Alpine amp mrd-m605


The amplifier probably has shorted output transistors. If the amp gives the same error message with the speaker wires disconnected from the amp, the amp needs to be repaired.

Dec 30, 2007 | Alpine MRD-M605 Car Audio Amplifier

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