amp cuts out certain frequencies

mulletdude · 7th May 2009, 12:17 AM

Hello i have the Sony str-dg520 amplifier and i just had a weird occurrance happen to me. this has happened before. after a while of playing audio at max volume all of a sudden the treble (not sure how to speel that) cut out almost completely. i am only using 3 speakers a left right and a center with most of the treble coming out of the center. i know if i turn my amp off and wait a while it comes back does anyone know whats causing this and any way to correct it.

mulletdude · 7th May 2009, 12:31 AM

NEW INFO:
ok now ive been playing music for a bit after this problem occurs. if it goes to a new song or gets paused for a second or two the treble cuts back in temporarily so i am not sure what to consider this. overheating cold solder or what.

Enzo · 7th May 2009, 03:28 AM

If I had to guess, you have a thermal cutout on the tweeter in your speaker. After being ovdrdriven for a periood of time, it heats up and turns the tweeter off until it cools down.

SOme small component like a Raychem Polyswitch or an equivalent is what I might expect.

mulletdude · 7th May 2009, 03:59 AM

sound splausible but the thing is the speaker im using that has a tweeter in it is rated for 125 watts and im only able to put 100 watts through it . would this still happen?

Jan Dupont · 7th May 2009, 07:18 AM

Quote:

im using that has a tweeter in it is rated for 125 watts

There are not many tweeters handling this kind of power, so where did you get that number from

If you are refering to that your speakers can handle 125 Watts, this doesn't apply to each of the speaker drivers.....

Because of a higher SPL (your tweeter is more sensitive than your mid and bass driver), your tweeter may only be able to handle 30-40 Watts if driven alone.

There is a good change that Enzo's suggestion is right

mulletdude · 7th May 2009, 09:25 AM

i meant to say that the speaker containing the tweeter( the only one in my system) has a total power rating with all drivers totaling 125 watts.

Cal Weldon · 7th May 2009, 02:07 PM

If you are driving it hard, your amp is capable of sending out short bursts of energy far exceeding the rated 100 watts. It's known as clipping and can be deadly to tweeters. It sounds like you're lucky to have the tweeter protection or they would likely be dead by now. Show restraint around the volume control my friend.

mulletdude · 8th May 2009, 03:48 AM

ok look i know my amplifier is not going into clipping so dont give me that bs.

Jan Dupont · 8th May 2009, 05:55 AM

Quote:

so dont give me that bs

We are actually trying to help you here, so why this behavior ???

Cal Weldon · 8th May 2009, 01:55 PM

mulletdude,

YGM

7th May 2009, 12:17 AM	#1
mulletdude diyAudio Member Join Date: Jun 2008	amp cuts out certain frequencies Hello i have the Sony str-dg520 amplifier and i just had a weird occurrance happen to me. this has happened before. after a while of playing audio at max volume all of a sudden the treble (not sure how to speel that) cut out almost completely. i am only using 3 speakers a left right and a center with most of the treble coming out of the center. i know if i turn my amp off and wait a while it comes back does anyone know whats causing this and any way to correct it.

7th May 2009, 02:07 PM	#7
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	If you are driving it hard, your amp is capable of sending out short bursts of energy far exceeding the rated 100 watts. It's known as clipping and can be deadly to tweeters. It sounds like you're lucky to have the tweeter protection or they would likely be dead by now. Show restraint around the volume control my friend. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

8th May 2009, 01:55 PM	#10
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	mulletdude, YGM __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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7th May 2009, 12:31 AM	#2
mulletdude diyAudio Member Join Date: Jun 2008	NEW INFO: ok now ive been playing music for a bit after this problem occurs. if it goes to a new song or gets paused for a second or two the treble cuts back in temporarily so i am not sure what to consider this. overheating cold solder or what.

7th May 2009, 03:28 AM	#3
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	If I had to guess, you have a thermal cutout on the tweeter in your speaker. After being ovdrdriven for a periood of time, it heats up and turns the tweeter off until it cools down. SOme small component like a Raychem Polyswitch or an equivalent is what I might expect.

7th May 2009, 03:59 AM	#4
mulletdude diyAudio Member Join Date: Jun 2008	sound splausible but the thing is the speaker im using that has a tweeter in it is rated for 125 watts and im only able to put 100 watts through it . would this still happen?

7th May 2009, 09:25 AM	#6
mulletdude diyAudio Member Join Date: Jun 2008	i meant to say that the speaker containing the tweeter( the only one in my system) has a total power rating with all drivers totaling 125 watts.

8th May 2009, 03:48 AM	#8
mulletdude diyAudio Member Join Date: Jun 2008	ok look i know my amplifier is not going into clipping so dont give me that bs.

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