Question about Audiofonics ADF-243 Car Audio Amplifier

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BLOWN FUSES WHEN I CONNECT SPEAKERS OTHER THAN AUDIOFONICS THE AMP BLOWS FUSES.

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If the fuse only blows when the amp is driven hard, the impedance of the other speakers is likely too low.

Posted on Sep 21, 2008

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Posted on Jan 02, 2017

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I have a Technics SA - DX750 Amp Everytime I turn it on I get an error message F70 and then it requests that I turn the power off. This is all it does now, so sound. How do I solve this issue I have...


Hi!

The F70 error certainly indicates a blown fuse inside.
The real problem is why the fuse is blown: there are only two possible reasons
1. there is a short circuit on the output (lines or speakers)
2. you have a blown output transistor (and that means some work and skills to replace).


To be sure, please change the fuse with a same rated fuse (buy more than one because it can blow again). Disconnect the speakers and turn the amp on. If the fuse blows again, it is sure something wrong with the output transistors. If the fuse remains ok, then please check all the wiring to the speakers.

Hope it helped.

Regards,

Bogdan

Aug 21, 2011 | Technics SA-DX950 Receiver

1 Answer

Both 8 amp fuses blown


Disconnect the speakers and replace the fuses with the proper specs ONE time and hope. Amps only have so many lives. If it blows them again take it to a tech to get fixed.

Otherwise, if it survived evaluate what you know about the event that blew the fuses and try not to repeat it.

Attach ONE speaker to one channel and see how that works out; then the other. You may have just blown the speakers or they may cause the fuses to blow again.

Jan 16, 2011 | Sony STR-DE825 Receiver

2 Answers

When right channel is wired it shorts out the power supply. Aragon 8008 when powered up without input and output, no problem. When connected with speakers and line level feed in, the left channel works...


Fuses blow when there is an overload caused by a short circuit. If the speaker you connect up to the amp causes a short. There is either a shorted part in the speaker or the wires to it are touching at some point. Assuming you can sort out the speaker issue and connecting a good speaker with good wiring and it still causes a short and blows a fuse. Then it's likely the output device(s) in the right channel have developed a short themselves. Perhaps as a result of being connected to faulty wiring or speakers.

Jul 18, 2017 | Aragon 8008 MK II 2-Channel Amplifier

1 Answer

My sony explode amp model xm-sd61x, 300 watt amp blows fuses as soon as i turn it on, I have it opened up, any suggestions


dissconect the speakers from the amp and power the amp up with no load, if it doesn't blow any fuses, check the resistance on the subs with a DMM to see if they are blown

Mar 29, 2010 | Car Audio & Video

1 Answer

Will not put out sond


Hello billyelder,

If the amp is powering up but not producting any sound, there are 4 possible causes.

1) Incorrect or faulty wiring.
2) No input or input too low for the amp.
3) Defective speakers.
4) Incorrect amp or head unit settings.

Start by checking all of the wiring and onboard fuses. Especially check the speaker wiring and make sure there are no shorts or grounds and that the insulation is not nicked or frayed. Check the RCA cables by substituting a known good pair. Check the receiver (head unit) to see if there are any settings that need to be turned on for the preamp outputs to work.

Test the speakers on another output to determine that they are functional.

Check the amp settings and insure that filters, crossovers and gain controls are properly set. If your wiring and the settings all check out and the speakers work on another output, the amp itself is probably defective.

Hope this helps.

Sep 01, 2009 | Audiofonics ADF-241 Car Audio Amplifier

1 Answer

Audiofonics adf-241 no power all wires connected fuses ok.


Hello pimprascalz,

Many amps will go into protect mode if one of the speaker wires is shorted or grounded, or if the voice coil(s) are defective. Try disconnecting the speaker wires one at a time and see if the amp still goes into protect upon power up. Likewise, some amps will go into protect if one of the inputs is grounding out. Again, to troubleshoot, disconnect them one at a time and try the amp. Next, make sure that the amp itself is not grounding. Most amps need to be mounted to a nonconductive surface. If the case contacts the frame of the vehicle, it can cause a problem. If the problem is not in the speaker wires or the input cables, the amp case is not contacting the vehicle frame, and you have checked your power, ground and turn-on leads, then the amp itself is probably faulty.

Hope this helps.

May 19, 2009 | Audiofonics ADF-241 Car Audio Amplifier

1 Answer

SWA1501 Sub blows fuses when turned on...


Shorted amp or blown speaker. Other things could also cause it. But there is a short circuit in it.

Mar 08, 2009 | Mackie SWA1501 Subwoofer

1 Answer

Audiofonics


i would go with the 801.And ithink u meant the 4501 not 4051.Both super power amps. competition stuff.your woofers are 4ohms dual voice coils.so you can series the coil on eaach woffer and use the two channels on the amp.they play at 2ohms.I think if you drop it down to 1 ohm you really be taxing you alternator that is series power.Yioou would need a special alternator.Even with them running in 2 ohms you better hav eat least a 2 farad cap.OR two batteries.. ! more thing don 't pump it up with window s closeed .you'll pop them.serious dbl. you be pumping.I'm jealous.Rating please and enjoy.

Feb 09, 2008 | Audiofonics ADF-272 Car Speaker

1 Answer

Audiofonics amp


Reconnect one speaker per channel and swap the RCA cables (L > R and R > L) to see if the working channel switches sides. If not, move all switches and controls to see if any are intermittent.

Jan 10, 2008 | Audiofonics ADF-241 Car Audio Amplifier

1 Answer

Blown fuses


I used to have one of those amps also (nice amp btw) Did you try another fuse of the same size?
Is it blowing fuses everytime you put one in or did it just blow that one fuse ?
Is the conection on the battery solid and clean of corrosion build up? Because that is a good amp and if wired properly shouldnt blow out or anything and so if the speaker is not blown then maybe connection is weak somewhere? I would try disconnecting the speakers from it and try a new fuse and if it does not blow the new fuse than amp is ok? and if it does blow the new fuse right away then there must be a short somewhere in the wire or the amp. then disconnect the fuse again and reconnect the speakers and if the fuse blows with the speakers connected but doesnt blow with them disconnected then you know it is a blown speaker causing the problem.

Just currious but what size fuse do you have connected at the battery?

Jan 06, 2007 | Rockford Fosgate Punch P4004 Car Audio...

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