 |
|
| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
| Reply |
|
|
LinkBack | Thread Tools | Display Modes |
|
#1
|
|||
|
|||
Audio Power AMP, whistling sound on high-bass sounds
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 |
|
#2
|
|||
|
|||
|
Audio Power AMP, whistling sound on high-bass sounds
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" wrote in message om... 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 |
|
#3
|
|||
|
|||
|
Audio Power AMP, whistling sound on high-bass sounds
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." wrote in message ... 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" wrote in message om... 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 |
|
#4
|
|||
|
|||
|
Audio Power AMP, whistling sound on high-bass sounds
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" wrote in message om... 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." wrote in message ... 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" wrote in message om... 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 |
|
#5
|
|||
|
|||
|
Audio Power AMP, whistling sound on high-bass sounds
Hmm. This battery and trickle charge technique sure sounds like a great idea.
Thanx a lot Mr. Jeff. -Bilal "Jeff" wrote in message ... 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" wrote in message om... 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." wrote in message ... 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" wrote in message om... 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 |
| Reply |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| Quality Of Tools | UK diy | |||
| Simple question regarding Ceiling tiles and sound? | UK diy | |||
| Generator FAQ | Metalworking | |||
| Power tools in Europe (long) | Woodworking | |||
Linear Mode
