An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert who has written 50 answers of more than 400 characters.
An expert whose answer got voted for 20 times.
Re: Do all speakers need to have the same impedance?...
Amplifiers sometimes like to have "balanced loads" on them, and this may be the case with your unit, meaning yes, all the impedances should match.
Judging by the impedance numbers you provided, you should be all set. You really want to avoid having something like 2 ohms on the left side and 8 ohms on the right side - grossly imbalanced. I don't see any problems with what you're going to run.
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!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Stephen, it may depend on how the system is protected, but generally the protection is designed to prevent the transistors from overcurrent. This would happen if you turn the volume up too high. If your receiver is newer--say built after 2005 or so, it will likely protect itself. You can hook up your speakers and see if it works. It will likely trip the internal protection at high volume, depending on the amplitude of the music signal. My main warning would be to not run the volume high for long periods and make sure there is nothing blocking the cooling vents on the unit.
short answer.....no. If you hook more than one speaker up to a single channel, it will lower the impedence and will damage the amp. You can hook up multiple speakers by using a speaker switch box between the speakers and the amp. This will match the impedence and should keep the amp from blowing.
Hi. You can always use a Receiver with an output impedance that is lower than the speakers input impedance.Problems arise when you try to use a Receiver with a higher output impedance than the Speakers input impedance.
The protect message appears when the current powering an amplifier inside the receiver goes beyond the safety limit or the amplifiers overheat. So just check the wiring and the speakers impedance with an ohmmeter - each should be above 6 ohms
If they are lower then you have a short in one of the actual drivers of the Bose 901 speaker . If the impedance is OK then the Onkyo overheats, place it in a better position to increase the airflow thru it.
hi, First of all remove all the speaker connections from the amplifier. After that power the amplifier and check the overload (protect) show or not . if not, then any of the speaker is damaged or you have to check the impedence of your receiver and speakers. It will be written on the rear side of both receiver and speakers in ohms. PIONEER recommend to connect 8 ohms speakers in to this AV receiver. If you are using 6 ohms speakers you have to do some setting in the AV receiver.For that do the following
1. With the receiver in standby, press STANDBY/ON while holding down the SPEAKER IMPEDANCE button.( Each time you do this, you switch between the impedance settings: )
SP 6 OHM - Use this setting if your speakers are rated at 6 Ohms
SP 8 OHM - Use this setting if your speakers are rated at 8 Ohms or more
You are not able to connect speakers with impedence bellow 6 Ohms with this receiver. Becuse the AV receivers impedence range is 6 - 16 Ohms.
If then also it shows protect you have to check the amplifiers hardware.
AV receivers shows protect mode , when there is a hardware fault in side it. Its a warning that some thing is wrong. Normally AV receivers show this when any of the output amplifier get some problem. there are six amplifiers in this AV receiver. May occur when the output diver transistors of any of the amplifier become shorted. if the output transistor get shorted this will lead to flow of current through the speakers. To prevent this there is a protection circuit for each channels. One combined output of this protection circuit is connected to the system control. when the any of the output amplifier fails, the protection circuit detects it and switch of the speaker and sent data to the system control. when the system control get this data it will give a warning to the customer throughdisplay that PROTECT. You have to check the amplifier. for that you need digital multimeter,soledring iron screwdrivers etc open the amplifier , then power it on. connect the negative terminal of the multimeter any where in the chase( metal body of the amplifer). then connect the positive terminal to all the output transistors emitter pin one by one . the voltage should be bellow 0.5V. If any of the emitter of the transistor shows voltage more than 0.5V., then that amplifier stage is faulty. Remove the transistors and check it. if it is shot then replace with a new one. after replacing the transistors do not power up the amplifier directly from the main. You have to put a bulb of 60 watts in serial. You can do this easily remove the mains fuse. put the bulb in a holder. now you have to wire from the holder. connect one of it to the one end of the fuse holder and the other wire to the other end of the fuse holder. Why using a bulb is, if there is any further problem in the amplifier stage on which the transistorsreplaced, there is a possibility of the new transistor get damage. if we use a bulb in serial with its mains supply ,when any overload in the amplifier occur the bulb will drop the current, by lighting itself. After connecting the bulb in serious power on the amplifier. watch the bulb. It should light for one or two second and go dim . if so check the display, is there is protect mode is on or not . if not and come back to normal operation ,then remove the power , remove the bulb insert fuse and check connect the power and check. If the bulb shows bright light then there is some component also faulty in the same amplifier. after removing the power you have to check again the amplifier stage of which the transistor is replaced, for any other faulty components. ok
Your speakers may be underpowered by your receiver.
Check the watts and impedance of the speakers, and the wattage of your receiver to make sure they closely match. (impedance is calculated in ohms- indicated by an omega symbol written near the wattage rating)
"Overload" may also mean that the amp went into protect mode, and that means that you're OVER-powering your speakers and it wants to protect them from damage due to impedance mismatch.
But- if the impedance and wattage match between the speaker and the receiver/amp, you should check the polarity of the speaker cables (+/-)
BTW- never put 2 speakers in 1 output- that will almost always cause something like this and will sound bad.
I hope this helps.
Just check your speaker cabling again. Make sure that all of them are seated properly, none is touching each other or the body of receiver. Rewire if necessary..
Are you using banana plugs for connecting speaker or just directly. Some times even a little tiny wire touching the receiver could trigger the protect mode. Be careful, since protect mode is sometimes not fast enough and it could blown a few trasistors in the power circuit.
Otherwise, do your bose speakers play out load on other systems?
If you have bare wire going into the receiver's output terminals, make sure a strand or two of wire is not touching the other terminal. That can short out the outputs, especially when you turn up the volume, which increases the voltage present at those terminals. That would cause the receiver to shut down as a saftey precaution.