Question about Car Audio & Video

1 Answer

Amp worked shortly, now no power

My amp was working on and off. I decided to adjust some settings on it (LPF, dB, V Level, etc). Then the subs started thumping--for about 2 minutes. Now there is *NO* power to the amp at all.. No lights come on (not even the protect light). Any ideas? I checked fuses and wire connections, no problems there...

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 18 Answers

It sounds like you clipped the amp and did damage to It and possibly the speakers. I would check all connections and wires first. If you used too light of wire you may have either burnt the insulation off or burned through the wire. High power amps need large power cables. If thats all ok, did you have a fuse from the pos power terminal? Check that. If every fuse is good and the connection are good then it sounds like you may have blown an internal component in the amp such as a Transistor, Diode, or Capacitor. This would mean taking it to a service facility.

Posted on Jul 22, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

The car had existing cables in it and i tried hooking up the amp to a sub i know works. The amp doesn't light up or anything and the sub doesnt put sound. What's wrong?


Those existing cables are suspect. Start by getting power to your amp, then connect other wires, regardless of color code, to the sub. Beware of wires that look good but really are shorted somewhere. You may have to label each wire as you go along to identify its real function. You may even have to run some new wires to replace existing ones.

Sep 05, 2015 | Kenwood KAC-5204 350 Watt Max Power Stereo...

1 Answer

Kicker dx 250.1 class d monoblock amp has a fixed lpf at 80 hz 24db octave non adjustable. My car stereo is a pioneer deh-x55hd with the sub control set at 100 hz -6 slope unable to turn sub control off to...


Do you have the subwoofer amp connected to the pioneer thru pre amp connections; pre amp output of pioneer to pre amp input of Kicker amp. Page 10 of the manual explains how to adjust the subwoofer output. You can select the cutoff freq. that will pass to the subwoofer; The slopes don't match perfectly, but if you use the -12 slope , it should work fine.
Cut-off frequency:
50HZ
-
63HZ
-
80HZ same as kicker cut in freq
-
100HZ
-
125HZ
-
160HZ
-
200HZ
Output level:
-
24
to
+6
Slope level:
-
6
-
-
12


http://www.pioneerelectronics.com/StaticFiles/Manuals/Car/DEH-X5500HD_OwnersManual112712.pdf

May 19, 2014 | Car Audio & Video

1 Answer

Is there a crossover in the ada885 sub box do i disconnect when using external amp


usually the external amplifiers have potentiometers that you can adjust called sub sonic and LPF. Find what your sub needs to be setup to and set the LPF to that frequency, usually 40-60hz.
Find the tuning of your box or the sub sonic frequency cut-off and set it there. usually 30hz and under, this will keep your subwoofer from unloading and damaging itself.

Nov 10, 2013 | Car Audio & Video

2 Answers

I have a pioneer gm-x 304 amp. I want to know what are the lpf-off-hpf switches for< and what sdhould I set the input levels to?


Hello packs6,

The lpf-off-hpf switches control the "low pass" and "high pass" filters. When driving full-range or component speakers the filters are usually operated in the "off" position to send all frequencies to the speakers. When driving a subwoofer, the best position is "lpf". If you have a separate amp to power a subwoofer, this amp can be used just for the high frequencies by putting the switches in "hpf".

Input levels should be adjusted to match your receiver output. You don't want the levels so high that distortion results. But you want it high enough for the amp to be able to produce maximum output. Start at about midrange and adjust the receiver volume to a little higher than a comfortable listening level. Adjust the amp gain (level) counterclockwise until you begin to hear the speakers distort. The turn the control slightly clockwise until the distortion disappears. That's the best setting.

Hope this helps.

Sep 02, 2009 | Pioneer Car Audio & Video

1 Answer

How do I turn my amp up...what nobs do I turn?


The purpose of the gain is to match the signal volts RMS coming from the source (CD player, etc.) to the input of the amp for correct power matching and to prevent clipping (damage by over powering).

Here is a guide that will help you set the gain correctly http://www.box.net/shared/uchv4dbk88

You'll need a multi-meter (AC voltmeter, $15 from Radio$hack), Microsoft Excel and a way to burn an audio CD from an MP3 (test tone included).

If you don't have Excel, You can downlaod OpenOffice by Java (SunMicro Systems) for free to read spweadsheets (and you thought spreadsheets were for business).

Set the LPF to just below the highest range of the frequency response of the subs. Meaning if the frequency response of the sub is 20-200Hz, set the LPF to about 180Hz

OR

set the LPF to where the other speakers start off. example, if the speakers start at 150Hz, set the LPF to about 160Hz. This overlap (or crossover - where the term comes from) is the ideal setting.

Set the subsonic (infrasonic) filter to about the same as the lowest setting in the range of the frequency repsonse of the subs. Meaning about 20Hz if that's the lowest in the range (20 -200Hz as above, if applicable).

Don't set the Bass Boost above +2dB (if applicable).

Set the phase to 0 (if applicable).


See my site for more info http://spkrbox1.spaces.live.com

Jul 31, 2009 | Lanzar MXA282 Car Audio Amplifier

1 Answer

How to ajust amplifiers (car audio)


MOST OF THE TIME U WANT UR AMP RUNNING UR SUBS TO MAKE THE SUBS SOUND REALLY DEEP AND HITE REALLY HARD BUT BE CARFULL WITH THE BASS BOOST IT CAN BE TO HIGH AND CAN BLOW UR SUBS, NOW WITH UR AMP RUNNING UR MIDS U DONT WANT A LOT OF BASS MAYBE NOT AT ALL CAUSE UR SUBS WILL HANDLE THAT, SO U WANT A LOT OF TREBLE WHICH SHOULD BE THE LPF, O AND ANY WHERE FROM 6DB-12DB WILL BE GOOD.

Jun 16, 2009 | Car Audio & Video

1 Answer

Frequencies


Hello again ronnieyannon,

It's probably best to allow the amp that is powering the subs to control the frequencies going to the sub(s). I would not use the lpf on both the head unit and the amp in any case. The control settings are not completely precise and you could end up with a lot of tweaking between the units to get the sound you want. I'd send full range to the amp and with it playing something with a lot of bass, set the 401s to "LP", the crossover slope to near maximum, and then adjust the frequency until it sounded best to me. Starting on page 11 of your manual are the Rockford-Fosgate recommended adjustment procedures, including setting the gains and the filter frequency.

Those numbers for the lpf on your head unit sounds like it allows you to decrease (-24dB), as well as increase (+6dB) the bass at the specific frequencies of 50, 63, 80 and 100Hz. You probably don't want to decrease the bass boost for subs. And the 401s will allow a boost up to 12dB and is variable from 50-250Hz.

Hope this helps.

Apr 24, 2009 | Rockford Fosgate Punch 401S Car Audio...

1 Answer

What duz level adjustment do


Hello,

The level control controls the input level coming from your head unit (receiver) to the amp.

Your Sony users manual is a little vague on how to best adjust the level and other controls.

Here is one method that some installers use and works well with most amps.

Most 10" subs sound best between about 80-100hz and below, so start out by setting the LPF at about 80hz. The HPF will not be used. Next turn the bass boost and gain all the way down. Turn on the radio and set all tone controls, bass, midrange, treble to flat, usually "0" on most head units. Turn the volume up to approximately 3/4 volume level or just until you begin to hear distortion. Now, back the volume down until the distortion is gone. Next turn up the gain control on the amp until you hear the subs start to distort then back the gain down until the distortion disappears. Next turn the bass boost up again until the subs begin to distort, then either back the bass boost down or back the gain down until the distortion is gone. You may need to play around with the bass boost and gain controls to get exactly the sound you prefer.

Hope this helps.

Mar 28, 2009 | Sony Xplod 1100 Watt Max 10" Subwoofer,...

1 Answer

Amp has 3 modes on it ,as a switch,what is this,it has a 2,3,4 channel mode,i have the gold dhd 1000watt x4 channel


first thing 1000@4 means 250w per ch. which means150w usable power.the mode switch is only to reduce rca cables,use 2ch mode if only 1 pair rca available,60hz is a bit low for this amp,90 would work better.

Aug 21, 2007 | DHD NTX-2009 Car Audio Amplifier

1 Answer

Protect light


Set your Filter Switch to LPF.  Turn the Bass Gain/ level all the way down temporarily. Set your Crossover to below 100HZ.  Then Turn on the system with a Bass test sound.  Turn up your bass Gain/level until you get distortion.  Then turn it back till you just get the distortion out. Then do not warn everyone that you will De-nad them if they touch your settings.

Oct 23, 2006 | Jensen JXP680 Car Audio Amplifier

Not finding what you are looking for?
Car Audio & Video Logo

Related Topics:

117 people viewed this question

Ask a Question

Usually answered in minutes!

Top Car Audio & Video Experts

xxxxxx xxx

Level 3 Expert

4869 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

yadayada
yadayada

Level 3 Expert

76673 Answers

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

Answer questions

Manuals & User Guides

Loading...