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Distortion in low frequencies which disappears when inbuilt amp is turned off

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DIGITAL S METER READING TOO HIGH WHAT VR POT TO ADJUST


please follow this steps and fix it. GOD BLESS you

    • 1
Turn on all of the devices in your sound system. Turn off any auto-equalizers on your sound system to gain fullest control over frequencies. This switch might be found on the receiver or the equalizer itself.
    • 2
Play a test song on repeat. Choose a song with both extremely high and extremely low instruments so that you have a wide frequency range to listen for.

    • 3
Listen for any obvious distortions in the highs and lows of the songs. Lower the knob on your equalizer for any distorted frequencies until the distortion disappears. Try at first to find the highest setting possible without distortion.
    • 4
Adjust all frequency ranges in relation to each other to find a pleasing blend for your room, trying not to let any one frequency range dominate the others. Use the highest non-distorting settings found in Step 3 as maximum settings, but don't be afraid to lower a booming bass or a screeching flute that disrupts the overall blend of the music.
    • 5
Play a song from a different genre to test how the EQ works for different types of music. A hip hop song will have louder lows than a string quartet, for example, so make sure your bass frequencies sound crisp on both types of music.

Nov 07, 2013 | Magnum DeltaForce CB Radio

2 Answers

Sound is distorted at certain frequency / volume what would cause this?


More infornation is required to provide a real answer, but I can give you a few possibilities:

1) There is a problem within the feedback loop that is allowing some frequencies through. This will be more prevelant at higher volume levels.

2) If there is a tube pre-amp section, the tube can be "microphonic". This too is generally more likely at higher volume levels.

3) Defective components in the amp section. These may pass some DC voltages that will sound like distortion.

If you can, please experiment a little to try to find when the problem is most obvious. With more details about when the problem occurs may give us enough info to determine the cause. Otherwise a trip to a service shop that has access to test equipment will be required.

Dan

May 21, 2011 | Behringer K3000fx 300w 4-channel PA...

1 Answer

Sony pvw2800p-when done with the recording & then playback at different machine,there seem some picture distorted(at the top frame)like recording in a low head quality,but already changed a new...


distortions are present on the same machine?
Need to check the squareness of recorded frequency mod packages, using a test tape CR2-1B. Distortion at the top of the frame it misses the heads on track while entering. Adjust S-reel achieve squareness packages.

Feb 23, 2011 | Sony PVW-2800 VCR

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

Amplifiers GT Series GT5-A604 ........explain settings


the amp probably has a x-over knob, a bass boost knob, and an eq knob. the eq is probably an internal crossover switch that will take the output from either high range (tweeters) or full range (6x9s) or low pass (subs) leave it on low pass. the bass boost however, will add distortion if turned up too high. its not noticable in the car, actually it sounds louder in the car but if you open the trunk and listen, you can tell its distorted bass and actually frying your speakers. the x-over knob is used to tune the frequency at which the amp stops pushing out bass tones. if you like rock music loud, turn it up higher, if you like low deep rap bass, turn it lower. keeping it too high might give you bad sound from either type though. ALSO THE GAIN OR LEVEL.IT IS NOT TO MAKE YOUR SUBS LOUDER IT WILL BLOW THEM .the gain is used to set your amp to your head unit which there is a procedure to do it.

Jun 15, 2009 | JBL GT5A604E 4-way Car Amplifier

1 Answer

Not gettin enough bass


Hello saini_jatt_2, On the JBL3501 700 watt monoblock, you have adjustments for low pass and a setting for boost marked DBO, allowing you to select and boost the frequencies sent to the subs. If your amp is not the 3501, but a different JBL amp, the settings may be different. Set the LP to either the white dot (about 100Hz) or slightly below to about 80Hz. Set the HP to about midscale or slightly higher. Set the boost to wherever the bass sounds best. One other setting that will affect bass volume is the "input level" or gain control. It should have been properly set by your installer, but you can "tweak" it for best performance. Turning it up increases the sensitivity and matches it with the output from your head unit. Too high will cause distortion. Too low will result in less bass. So you want to set it just to the point that you begin to hear the distortion and then back it off slightly until the distortion disappears. Hope this helps.

Jun 05, 2009 | JBL GTO1202D Car Subwoofer

1 Answer

Peavey Bass Amp TKO115s


Start with a clean setting - zero cut and zero gain on the Eq. Play a song close to the amp, and then move away, playing the same notes. Do you still get the distortion? Change lower the input gain and repeat the test. Lower the output gain and repeat. Are any outboard distortion pedals in the mix, such as overdrive? Eliminate them. Run straight through from your axe to the amp. Check for any distortion settings. Set everything including reverb to zero. When the distortion disappears, this is your base setting.
Change only ONE parameter at a time. When the distortion comes back, you have found your problem.+

Dec 03, 2008 | Peavey EQ215FX Home Equalizer

1 Answer

Problem with amp?


Give that new sub a chance to "break in". New speakers require a few hours of use before the voice coil(s) and spider break in and began operating at their best performance. Is the box within the operating specs of the sub? Is this a ported box; if so you will here some turbulance type noise from the port. What type of distortion are you hearing? Alternator noise(dentist drill like sound) would only be noticable through a sub at lower volumes due to the frequency response of a sub. Is the amps lowpass crossover turned on?

Mar 08, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

2 Answers

Auto Sub woofer


There are several causes of distortion in an audio setup.

1) Speaker is unable to handle the frequency that it's being fed
2) The volume is too high for the speaker to handle
3) The amp can't provide enough power to drive the speaker adequately.

Either way distortion is BAD & best to be avoided unless you want an excuse to buy a new set of speakers :P

Nov 08, 2007 | MA Audio EHO152 15" 5000 Watts Subwoofer...

1 Answer

Alpine pdx 1.1000 amp


These subs are dual voice coil I'm sure...make sure they are putting a 2 ohm load on the amp total, and also set your gain and frequency setting right. Set the frequency around 85 or 90, make sure the lo pass filter is on. Turn the gain ALL the way down and turn your stereo to the point right before your speakers distort....then slowly increase the gain until the subs are playing at full volume. This should not even be close to all the way up, and the subs should sound accurate and bold. Turning them past this point will cause distortion, in which case you should back off the gain a bit. Distortion causes power to cycle through the amp very rapidly and can cause blown subs and blown fuses. If you do not know how to wire both subs for a combined load of 2 ohms, please let me know what type of subs you have.

Aug 05, 2007 | Alpine PDX-1.1000 1000W x 1 Car Amplifier...

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