Audio Power AMP, whistling sound on high-bass sounds

B

Bilal

Guest
Instead of the actual sound, a whistling (high pitch) sound
is heard from my speakers, whenever a
strong bass-beat comes in an audio track. Is this pointing
towards the fact that the power supply connected with the
power amp is inadequate for the AMP's current requirements.
I postulate this becoz there is no distortion of any kind and the
audio signal is not clipped in any of the pre-amp/tone-control
sections.

The power amp is of a car-tape. I don't have its power
ratings etc. However, the circuitry is completely covered in
cover-like heatsink.

My power supply is a 12VDC capable of 6 Amperes.

Thanx for taking the time to read this query!


-B
 
If you look at the output wattage rating of the car power amp, your
supply must be a minimum rated at about 3 to 4 times of that. A typical
50 W/ch auto amp requires atleast a 150 Watt supply at 12 Volts. This
translates to about 12.5 Amps minimum. The supply should also be well
regulated.

If the supply is not ridged enough, it will start to dip on the peaks.
This will cause the inverse feedback, and the overall output current to
become unstable. This may give the sound of oscillations.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
==============================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
Instruments http://www.zoom-one.com/glgtech.htm
==============================================
"Bilal" <multh@yahoo.com> wrote in message
news:d9a309cb.0308271240.4e4693b3@posting.google.com...
Instead of the actual sound, a whistling (high pitch) sound
is heard from my speakers, whenever a
strong bass-beat comes in an audio track. Is this pointing
towards the fact that the power supply connected with the
power amp is inadequate for the AMP's current requirements.
I postulate this becoz there is no distortion of any kind and the
audio signal is not clipped in any of the pre-amp/tone-control
sections.

The power amp is of a car-tape. I don't have its power
ratings etc. However, the circuitry is completely covered in
cover-like heatsink.

My power supply is a 12VDC capable of 6 Amperes.

Thanx for taking the time to read this query!


-B
 
Dear Mr. Jerry,

Thanx for your time.

Currently, my power supply is a 12VDC capable of 6 Amperes.
Would connecting TWO power supplies of 12 VDC 6 Amperes,
in parallel, be equivalent to ONE 12VDC 12 Amperes power supply?
or
a single power supply of 12 Amperes is the only valid option?

-Bilal


"Jerry G." <jerryg@total.net> wrote in message news:<bijejd$9ld$2@news.eusc.inter.net>...
If you look at the output wattage rating of the car power amp, your
supply must be a minimum rated at about 3 to 4 times of that. A typical
50 W/ch auto amp requires atleast a 150 Watt supply at 12 Volts. This
translates to about 12.5 Amps minimum. The supply should also be well
regulated.

If the supply is not ridged enough, it will start to dip on the peaks.
This will cause the inverse feedback, and the overall output current to
become unstable. This may give the sound of oscillations.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
==============================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
Instruments http://www.zoom-one.com/glgtech.htm
==============================================
"Bilal" <multh@yahoo.com> wrote in message
news:d9a309cb.0308271240.4e4693b3@posting.google.com...
Instead of the actual sound, a whistling (high pitch) sound
is heard from my speakers, whenever a
strong bass-beat comes in an audio track. Is this pointing
towards the fact that the power supply connected with the
power amp is inadequate for the AMP's current requirements.
I postulate this becoz there is no distortion of any kind and the
audio signal is not clipped in any of the pre-amp/tone-control
sections.

The power amp is of a car-tape. I don't have its power
ratings etc. However, the circuitry is completely covered in
cover-like heatsink.

My power supply is a 12VDC capable of 6 Amperes.

Thanx for taking the time to read this query!


-B
Click to expand...
 
A car battery and a low ohm (~0.5-1) 20W resistor or
two would allow more than enough current.
you would connect1/both supplies to trickle charge the
battery thru the resistor/s while the battery supplies the
current.
Not a good way to do it for long term use inside but for
testing higher powered amps it works.
Jeff

"Bilal" <multh@yahoo.com> wrote in message
news:d9a309cb.0308291149.45075488@posting.google.com...
Dear Mr. Jerry,

Thanx for your time.

Currently, my power supply is a 12VDC capable of 6 Amperes.
Would connecting TWO power supplies of 12 VDC 6 Amperes,
in parallel, be equivalent to ONE 12VDC 12 Amperes power supply?
or
a single power supply of 12 Amperes is the only valid option?

-Bilal


"Jerry G." <jerryg@total.net> wrote in message
news:<bijejd$9ld$2@news.eusc.inter.net>...
If you look at the output wattage rating of the car power amp, your
supply must be a minimum rated at about 3 to 4 times of that. A typical
50 W/ch auto amp requires atleast a 150 Watt supply at 12 Volts. This
translates to about 12.5 Amps minimum. The supply should also be well
regulated.

If the supply is not ridged enough, it will start to dip on the peaks.
This will cause the inverse feedback, and the overall output current to
become unstable. This may give the sound of oscillations.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
==============================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
Instruments http://www.zoom-one.com/glgtech.htm
==============================================
"Bilal" <multh@yahoo.com> wrote in message
news:d9a309cb.0308271240.4e4693b3@posting.google.com...
Instead of the actual sound, a whistling (high pitch) sound
is heard from my speakers, whenever a
strong bass-beat comes in an audio track. Is this pointing
towards the fact that the power supply connected with the
power amp is inadequate for the AMP's current requirements.
I postulate this becoz there is no distortion of any kind and the
audio signal is not clipped in any of the pre-amp/tone-control
sections.

The power amp is of a car-tape. I don't have its power
ratings etc. However, the circuitry is completely covered in
cover-like heatsink.

My power supply is a 12VDC capable of 6 Amperes.

Thanx for taking the time to read this query!


-B
Click to expand...
 
Hmm. This battery and trickle charge technique sure sounds like a great idea.
Thanx a lot Mr. Jeff.


-Bilal

"Jeff" <frontline_electronics@NSatt.net> wrote in message news:<1_Q3b.120645$3o3.8440314@bgtnsc05-news.ops.worldnet.att.net>...
A car battery and a low ohm (~0.5-1) 20W resistor or
two would allow more than enough current.
you would connect1/both supplies to trickle charge the
battery thru the resistor/s while the battery supplies the
current.
Not a good way to do it for long term use inside but for
testing higher powered amps it works.
Jeff

"Bilal" <multh@yahoo.com> wrote in message
news:d9a309cb.0308291149.45075488@posting.google.com...
Dear Mr. Jerry,

Thanx for your time.

Currently, my power supply is a 12VDC capable of 6 Amperes.
Would connecting TWO power supplies of 12 VDC 6 Amperes,
in parallel, be equivalent to ONE 12VDC 12 Amperes power supply?
or
a single power supply of 12 Amperes is the only valid option?

-Bilal


"Jerry G." <jerryg@total.net> wrote in message
news:<bijejd$9ld$2@news.eusc.inter.net>...
If you look at the output wattage rating of the car power amp, your
supply must be a minimum rated at about 3 to 4 times of that. A typical
50 W/ch auto amp requires atleast a 150 Watt supply at 12 Volts. This
translates to about 12.5 Amps minimum. The supply should also be well
regulated.

If the supply is not ridged enough, it will start to dip on the peaks.
This will cause the inverse feedback, and the overall output current to
become unstable. This may give the sound of oscillations.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
==============================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
Instruments http://www.zoom-one.com/glgtech.htm
==============================================
"Bilal" <multh@yahoo.com> wrote in message
news:d9a309cb.0308271240.4e4693b3@posting.google.com...
Instead of the actual sound, a whistling (high pitch) sound
is heard from my speakers, whenever a
strong bass-beat comes in an audio track. Is this pointing
towards the fact that the power supply connected with the
power amp is inadequate for the AMP's current requirements.
I postulate this becoz there is no distortion of any kind and the
audio signal is not clipped in any of the pre-amp/tone-control
sections.

The power amp is of a car-tape. I don't have its power
ratings etc. However, the circuitry is completely covered in
cover-like heatsink.

My power supply is a 12VDC capable of 6 Amperes.

Thanx for taking the time to read this query!


-B
Click to expand...
 
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