Question about Audio Players & Recorders

1 Answer

80 watt impedance matching volume control

Stero keeps switching off, must have a circuit breaker. How do you test if the volume controls or the speakers might be shorting the stero out? The stero was working fine for 6 months now it shorts out after 2 minutes.

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 236 Answers

Check your spekaer cabling first for any loose connection. if everything as usual then something is wrong with either your speaker system or the power output stage of your amp. you may call it a "circuit breaker" but it actually overload protection of the power amp so as not to damage speakers or amplifiers. have your speakers checked for burn coils. you can also try to remove or turn off speaker switch, turn on the power, level up the volume and see it the system still stays on and does not trip (as you called circuit breaker) if the unit remains on, then it must be your speakers. though it could also be a leakage in the power transistors of your output stage, it something a technical person have to do to check anyway.

redrivera

Posted on Mar 26, 2008

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I purchased a 7000W Westinghouse Portable Generator to back feed my circuit breaker box. The cable is rated to 30amps. Do I use a 30 amp or a 40 amp circuit breaker? Thanks, Mike


1) Match wire and breaker:
http://waterheatertimer.org/Color-codewire.html
http://waterheatertimer.org/See-inside-main-breaker-box.html

2) 7000 watts divided by 240 volts = 29.1 amps.
30 amp breaker x 80% safe maximum = 24 amps.
This means you should use 8 gauge wire and 40 amp double pole breaker for 240volt

3) 7000 watts divided by 120 volt = 58.3 amps.
60 amp breaker x 80% safe maximum = 48 amps.
So use 70 amp breaker and #4 wire.

Jan 30, 2013 | Electrical Supplies

1 Answer

No lights upstaires circuit breaker keeps tripping


Jan 2013
1) Move wire to another same-size circuit breaker to eliminate bad circuit breaker as suspect.
Do NOT increase size of breaker or it will cause fire.
http://waterheatertimer.org/How-to-replace-circuit-breaker.html
http://waterheatertimer.org/Troubleshoot-household-electricity.html

2) Put hand on each appliance and outlet to see which ones are warm. Outlet should never be warm or hot. Replace outlet. Inspect wires for loose and burned connections.

3) If the breaker is good, then add up total watts being used by checking watt rating on each device. 100 watt light bulb is 100 watts. Big screen TV has a label that shows 300 to 500 watts. Computer has label. Space heater has label showing 1500 watts. Iron has a watt rating label. Take total watts and divide by 110Volts and this will give amp load. Total watts used = 2000 and then divide 2000 by 110 volts = 18.8 amps
Compare amp load with circuit breaker.
20 amp circuit breaker has 80% safe maximum, or 16 amps.
If amp load is 18.8 amps, then 20 amp breaker is starting to get hot, and weak breaker will start tripping.
If amp load is 18.8 amps, and breaker is 15 amps, then you are overloaded and breaker is feeling the heat, and tripping because of heat.
Solution is to reduce amp load.

4) If you have short circuit, that can also trip breaker.
Unplug everything and then plug things back in slowly to see which plug or appliance is causing the problem.

Jan 18, 2013 | Electrical Supplies

1 Answer

How do i know when 220 circuit breakers are bad


Always match breaker and wire size:
http://waterheatertimer.org/Color-codewire.html
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

Feel if breaker is getting warm.
Listen for crackling sound.
Breaker is tripping.
Move wires to another same-size circuit breaker and see if problem continues.

Check watt or amp load on breaker.
For example water heater label shows 4500 watt non-simultaneous.
4500 watts divided by 240 volts = 18.75 amps.
You might think 20 amp breaker was good in this case.
However electricians use 80% safe maximum.
20 amp breaker x 80% safe max = 16 amps.
Water heater is 18.75 amps, so install 30 amp breaker.
30 amp breaker uses 10 gauge wire.
This means wire to breaker will run cool and not get hot, so breaker lasts longer, and there is more efficiency.
Using 80% safe maximum rule protects home, reduces heat wear on breakers and breaker box so everything lasts longer.

Nov 18, 2012 | Dryers

1 Answer

Does adding more electrical outlets require to increase breaker amps/condiut?


Yes maybe, depending on what you are doing.

1) Electric Code generally says Maximum 12 boxes per electric circuit controlled by 1 circuit breaker. If you have more boxes, then your house can fail inspection IF inspector finds problem. But it is a minor problem if wire size, breaker size, and amp loads are safely matched.
http://waterheatertimer.org/How-to-wire-switches.html#add

2) Reason for the code: so there is not power loss to last box when many things are drawing power from same circuit, which can cause overheating of circuit and trip breaker, and cause heat damage to some electronic devices and motors.

Which is why you are asking the question.

3) In practical terms, if you are adding outlets to run another light bulb, then you will probably not notice any problem.
However if you are adding plugs so you can run shop tools, or blower motor, or compressor etc, then that can be a problem.

For example if wire is too long, there will be power loss to motor which will cause motor overheating and shorten life of equipment.

4) Solution.
Calculate total amps and watts expected on that circuit.
Add up watts of everything running at same time.
Volts x amps = watts
120 volt microwave uses 1500 watts, how many amps?
Amps = watts divided by volts, so 1500 watts divided by 120 volts = 12.5 amps.
Compare your total expected amp usage to charts on following link.
Make sure you have correct wire and circuit breaker for expected amps. Oversizing wire and breaker are good idea.
http://waterheatertimer.org/Color-codewire.html

Oct 27, 2012 | Electrical Supplies

1 Answer

How many 5 watt outside lights can you power with a 20 amp breaker?


Volts x amps= watts.
20 amp breaker x 125 volts = 2500 watts.
However, electrician use the 80% rule, so multiply 2500 x 80% = 2000 watts.
So if you have 20 amp breaker, and 12 gauge wire, and 20 amp switch, and distance is less than 150 feet, then watt load is 2000 watts or 400 5-watt bulbs.
Keep in mind that most switches are 15 amp, and not 20 amp.
Recalculate for 15 amp switch = 1875 watts x 80% = 1500 watts or 300 5-watt bulbs.

Jun 22, 2012 | Home

1 Answer

Whirlpool Range model RF386PXGQ2 broiler won't shut off


Hi.

If the element does not turn off, possible faults are:

Shorted temperature probe.
Test temperature probe reading impedance. If impedance is zero or lower than 0.500 Ohms, the the probe is shorted. A good probe reads about 1KOhms.

Contact at element. A contact in element wiring harness may cause the element to stay on. Do continuity test between ground and element and on wiring harness.

Defective control module.
If problem is none of the above, then it is the oven electronic control(ERC). The ERC can be tested reading voltages.

Testing must be done by a trained technician.

Dec 13, 2011 | Whirlpool RBS305PD Electric Single Oven

1 Answer

How many lights or ceiling fans can I hook up to one 15a single pole circuit breaker.


First of all, are there any other appliances or lights on this circuit? If so, they must be included in the total wattage for the circuit. The fan units are either listed with the Amp rating or wattage rating (Volt Amp) VA. The total amperage allowed on a 15 A circuit is 12A.(80% of the total per NEC). The total wattage would be 1380 watts. ( 115 Volt single phase X 15A = 1725 watts, 1725 x 80% = 1380 watts)

Jan 04, 2011 | Cutler Hammer Ch115 15a 1 Pole Circuit...

1 Answer

I hooked up 2channel 500 watt amplifer and 1200 watt 300 rms subwoofer now the protection light comes on when i turn up volume


your speakers rating is too low for your amplifier. 300 watts RMS means the speaker can operate on an average of 300 Watts continuously. the 1200 watt rating is peak wattage input and meant for intermittent intervals only, a like a bass drum beat count. also , your speaker impedance must match your amplifier impedance or the speaker must be a higher impedance than the amplifier. Never lower than the amplifier's impedance output rating. If The amplifier is rated into an 8 ohm load, your speaker must be 8 ohms or higher. in other words you cannot use a 4 ohm speaker or you will damage the amplifier .

Mar 14, 2010 | Car Audio & Video

2 Answers

Fahrenheat 4000 watt wall mounted heater shuts off and needs reset


the reset is probably an inline circuit breaker. if you can get hold of am amprobe clamp around ammeter, check the current when the unit is running at full power. the reading you get check against the current rating of the inline breaker. your fan motor bearings may be dry increasing the current draw of the unit and tripping the breaker. try oiling the fan bearings with a light oil NOT WD-40.

Dec 06, 2007 | Fahrenheat (FFH1614) Wall Mounted Panel...

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

110 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

kakima

Level 3 Expert

102366 Answers

 Grubhead
Grubhead

Level 3 Expert

4990 Answers

The Knight
The Knight

Level 3 Expert

73460 Answers

Are you an Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...