Question about Alpine MRV-F345 Car Audio Amplifier

1 Answer

No sound The amp and fan turn on so does the display, but I can get any sound out of it, I bench tested it hooked up to a 12v pwoer source that is no the strongest but it powers up other amps w/ no problems, got a suggestion ???

Posted by brazuca on

Ad

1 Answer

Anonymous

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,139 Answers

This is a good start but, I would make sure that the power supply you are using is able to supply the current needed to power this unit. Once that is done I would use a dummy load to emulate the speaker connections and the use an oscilloscope to monitor the audio output signal. If you still have no output it would be safe to assume that the internal circuitry of the amplifier is at fault. I would suggest that you get a schematic and trace the audio signal through the unit using the signal path guide on the schematic. This will let you know where the signal is dropping off at and if the drop off is being caused by protection circuitry or if on of your amplification stages are at fault.

Posted on Sep 03, 2007

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

0helpful
1answer
0helpful
1answer

Cant get remote wire to turn on amp. it is running from back of kenwood deck to kenwood amp.

OK ! FIRST THINGS FIRST. DID U TEST THE AMP FIST. BEFORE U STARTED INSTALLING RCA CABLES,AND REMOTE WIRES. LETS DO THAT FIRST.GRAB YOUR AMP.SET IT ON YOU WORK BENCH ,TABLE,OR CHAIR.THEN GET (2)PIEACES OF #10 OR #12 WIRE W/1 OF THE WIRES HAVING A 20AMP FUSEABLE LINK ON IT.NOW THE WIRE W/THE FUSEABLE LINK ON IT.CONN THE REMOTE(REM) AND THE 12v + ON THE AMP AND HOOK THEM BOTH TOGETHER ON 1 SIDE OF THAT FUSEABLE LINK WIRE. AND THE OTHER WIRE HOOK IT UP THE - GROUND SIDE OF THE AMP .NOW PICK UP YOUR AMP OPEN UP YOUR HOOD.MAKING SURE THAT NO WIRES OR THE AMP IS TOUCHING THE + 12V OF THE BATTERY. NOW CONN YOUR GROUND TO GROUND AND THE FUSEABLE LINK ON THE +12v SIDE OF THE BATTERY.NOW THE AMP SHOULD HAVE CAME ON. LOOK 4 A SOLID RED LIGHT OR ANY SIGNS OF A SOLID LIGHT THAT HAD CAME ON.
0helpful
1answer
2helpful
1answer

I hooked this 1000 watt amp up.it turns on but it

Your amp needs to be serviced. Bad protection circuit. Take it to a local car audio shop and have them bench test it first to be sure. Hope this helps.
2helpful
2answers

Does not turn off and drains the battery

do u have the amp hooked to a switched terminal of the igntion switch?
0helpful
1answer

How do I bench test?

A bench test will require a 12VDC source, such as an car battery. You would connect wires according to the instuctions (i.e., red to 12v(+), black to 12v(-), and the required ignition wire you can toggle by touching it to the 12v(+) when required. Your schematics should show how the relay needs to be wired. And it's really simple. 85 and 86 are the coils. In most cases, (for example), 85 will have a 12v(+) connection, 86 will receive an input from the remote keyless entry (RKE) to activate the option. So, if you're using this relay, say, to activate your 12V(+) parklights, the 12V(-) from the RKE will go to 86, you'll have another 12V(+) wire connected to 30, and the connection to the vehicles parklights will connect to 87. 87a will have no connection in this application. The 12v(+) to the relay should come from a fused 12v(+) source.Trunk release will work the same, depending on whether it's a positive or negative trigger (depends on vehicle). You'll use the trunk output (should be a negative output from RKE) to the relay as described above. If the Trunk release is a negative trigger, you would connect a wired from a ground source (i.e., metal screw in kick panel) to 30, and 87 would go to the trunk's trigger wire at the switch.
0helpful
1answer

Amp keeps turning off

an amplifier needs minimum voltage (usually 6Amps) to turn on. If there is 12V at the input of your amplifier, check the remote for 12V as well as making sure the ground is secured. I suspect based on limited information, that your alternator/charging system is the culprit.Take your amplifier to a local shop and have it bench tested (abuot $10) they will hook up to an independant power supply and verify its properly working. Then it can be eliminated as the source of the problem. Also be sure your wiring and fuse are accurate for the amount of current draw.
Since your protection has never come on, and the power light is going out altogether, you may have an input voltage problem.
0helpful
1answer

NISSAN 240SX A/C PROBLEM.

HI,
Yeah have the voltage to the compressor checked!..By turning on the A/C when hot (and not working),Add a test wire to the 12v output of the A/C relay, to "boost" the 12v amps/voltage going to the compressor clutch. As soon as the test wire touches a strong 12v source, the clutch immediately kicks in. Remember that 12v already existed on that wire, but a stronger 12v source helped give the clutch the extra kick it needs. Thank you!!..Hope this helps you out buddy!!.. :)
0helpful
1answer

HEY, YOU REPLIED TO MY AMP PROB....

Are you sure that you hooked up the correct wire? You can try testing with a 12V test light, test with radio on then off, test to see if the wire has 12v when either source is turned on too. Other than that I will have to do a little bit of digging and see what I can come up with. I'll let you know what I find.
0helpful
1answer

Power turns on briefly

Sounds like a protection problem. A relay may be stuck, or there really may be an internal problem you cannot see. Take it to a shop to have it bench tested independent of your vehicle.
Not finding what you are looking for?
Alpine MRV-F345 Car Audio Amplifier Logo

Related Topics:

112 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

76625 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...