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If you replace a 4 ohm speaker with an 8 ohm speaker can the amplifier blow the speaker?
Wiki User
∙ 14y ago
A1: The output impedance of a power amplifier is always less than 0.1 ohms. There are no 4 ohm amplifiers on the market!
A2: I actually just bought a new car radio/CD player that specifically shows 4 ohm speakers on the sticker. It is designed to work optimally with 4 ohm speakers. If you use 8 ohm instead, it will work, but you will not get the full power output that is specified. The amp can only kick out so much voltage and so much amperage - if it is designed for 4 ohm speakers, and 200 watts (stereo, so 100 watts per speaker), it can supply 20 volts (P = V^2 / R). If you used 8 ohm speakers to this amplifier, each speaker would only get 50 watts powered at full output voltage.
Alternatively, if it is designed for 8 ohm speakers and 100 watts per speaker, it can provide 40 volts. If you used 4 ohm speakers instead, each speaker could be given 200 watts at 40 volts, resulting in severe overheating and damage to the amplifier.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoYes, you can connect two 8 ohm speakers to an 8 ohm amplifier, but do not expect full power range. That is not normally a problem, because we rarely, if ever, run an amplifier at anywhere near full power.
If you connect the speakers in series, red to non-red, you will reach the amplifier's voltage clip level before you reach its current clip level.
If you connect the speakers in parallel, red to red, you will reach the amplifier's current clip level before before you reach its voltage clip level.
Best is if you match the amplifier's design impedance. Second best is if you use four 8 ohm speakers, connecting them in series-parallel, giving a net impedance of 8 ohms, and a per speaker power dissipation of one quarter.
Wiki User
∙ 15y agoI allready answer this question the other way around. yes minus efficiency.
Wiki User
∙ 14y agoYou will get lower output and the amplifier will still work fine.
Wiki User
∙ 13y agoYou can connect 8 ohm speakers to a 2 ohm amplifier, but you are not going to achieve rated power. It is better to use the exact speakers designed for the amplifier.
Wiki User
∙ 12y agoYes, but you won't get anything close to maximum rated power.
In a 32 ohm load you will get one quarter of the power which would be developed in an 8 ohm one.
Wiki User
∙ 10y agoNot if the Volume is keep at a low level. The 4 Ohm speakers would allow the Current flow and thus the WATTAGE to rise above the safe level of an 8 Ohm matched Amp.
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Will 8 ohm speaker work with 4 ohm bass guitar amplifier?
Yes. As long as the speaker impedance is higher than the minimum rating for the amplifier, you are OK.
Can a 8 ohm speaker replace a 6 ohm speaker?
You need to find out how many ohm's your deck is pushing out and make sure you have the right grade speaker wire so you don't under power the speakerRubbish. A "deck" doesn't "push out" ohms.An amplifier is designed to develop a stated power in a stated impedance, and that is based on the amplifier's ability to deliver current.An amplifier designed to deliver maximum output to a 6 ohm load can safely drive an 8 ohm one. But it will not be able to develop its maximum power.
What is affect of using a 3 ohm speaker with a 100 Watt amplifier?
Amplifier power and impedance are not related, although a lower impedance speaker will be louder. Most home stereos cannot drive loads below 4 ohms, however, so using this 3 ohm speaker with a home theater may cause the amp to go into protection mode or shut down completely. Check your owner's manual to see what impedance of speaker your receiver can safely drive.
Can you run 4 70w speakers on a 150w amp or will it blow?
It's entirely possible to use four 70W speakers with a 150W amplifier but the method will depend on the speakers and the amplifier specification. We will assume that the amplifier will deliver up to 150W per channel, so two speakers will be used on each channel. If the amplifier is rated to drive a 4 ohm load, then two 8 ohm speakers can be wired in parallel and connected. In this instance, take care NOT to drive the amplifier too hard. It will overdrive the speakers at about the same time that it will begin to show a distorted output. This is a condition that can easily damage speakers so be very conservative with the volume control. If the speakers are 4 ohm speakers, they can be wired in series to provide a total impedance of 8 ohms. If the amplifier is rated to deliver 150W into 4 ohms, then the total power to the speakers will be lower than to a single speaker. The benefit is that no speaker can be over-driven and there is a good amount of headroom for safety.
Can you play 8 ohm speakers on a 16 ohm amp?
There is no 8 ohm solid state amp. Really! The output impedance of such an amp will be arround 0.4 ohms. Scroll down to related links and look at "Interconnection of two units- Voltage Bridging - Zout < Zin".You can, as long as the amp's impedance is much lower to the speaker(s) total ohm load you're fine. We have never impedance matching there.
Can you replace an 8 ohm speaker with a 4 ohm speaker?
Only if your amplifier is capable of driving a 4 ohm speaker. Some have a switch on the back to select 4 or 8ohm speakers. Details should either be printed some where on the back of the amp or the instruction manual
Can you power 8 ohm speakers with a 4 ohm amplifier?
Yes, but you won't get rated pwer. Best is to match the speaker to the amplifier.
Will 8 ohm speaker work with 4 ohm bass guitar amplifier?
Yes. As long as the speaker impedance is higher than the minimum rating for the amplifier, you are OK.
Is a 4 ohm subwoofer better then a 8 ohm subwoofer?
You need to match the speaker with the amplifier. Better or worse is not the question. The question is dynamic range and the possibility of overloading the amplifier. If the amplifier is rated 4 ohms, use a 4 ohm speaker. Same for 8 ohms. Do not "mix and match".
Can resistance be added to speakers to make a 4 ohm speaker have an 8 ohm load?
You "can" add a four ohm resistor in series with a four ohm speaker, and make it look like an eight ohm speaker, however, the frequency response will not be the same. It is better to use to correct speaker for the amplifier, or use two four ohm speakers in parallel. That resistors power rating must exceed the rating of the speaker. Half the from the amplifier will go to the speaker, while half will go to the resistor, making it get quite hot.
Will an 8 ohm speaker work with an 6 ohm amplifier?
Yes, but it will not be as loud as it would have been had a 6 Ohm speaker been used. Byt the way, the word 'Ohm' is capitalized, because it was someone's name.
Can you use three 8 ohm speakers with one amplifier?
If the amplifier is designed for an 8 ohm load, then you should use an 8 ohm load. Three 8 ohm speaker in series is 24 ohms, and in parallel they are 2.67 ohms. Neither of those is a good match for an 8 ohm rated amplifier. If you do this, you will not achieve rated power, and you may well damage the amplifier.
Will a 4 ohms speaker work with a 16 ohms amplifier?
An amplifier that is rated to drive a 16 ohm load will not perform well if a 4 ohm load is applied to it. The output rating is calculated to allow the highest power output from the amplifier. If a 4 ohm speaker is used instead of the recommended 16 ohm speaker, the current output will be far higher for a given output voltage. Although the amplifier will drive the speaker at low levels, as the volume is increased, the output current may rise to the point where it will damage output transistors or perhaps the main power supply. Some 16 ohm rated amplifiers may well handle 4 ohm speakers without damage but the only way to find out is to try it - meaning a dead amplifier if the test isn't successful. So, just like my previous answer (what happened to it?), the answer is YES but not as well.
Can a 8 ohm amp power a 4 ohm speaker?
You will find no 4 ohm amplifier! So you will need no transformer. All audio amplifiers have output impedances of lower than 0.5 ohms. We have "impedance bridging" between amplifier and loudspeaker - no matching. Scroll down to related links and look at "impedance bridging - Wikipedia".
I have a home theater system i also have two different subwoofers 4ohms and an 8 ohms which one is better?
The impedance of the speaker does not determine its quality. Assuming that your amplifier can drive the 4 ohm speaker, you will notice that this speaker is louder than the 8 ohm one.
Can a 8 ohm speaker replace a 6 ohm speaker?
You need to find out how many ohm's your deck is pushing out and make sure you have the right grade speaker wire so you don't under power the speakerRubbish. A "deck" doesn't "push out" ohms.An amplifier is designed to develop a stated power in a stated impedance, and that is based on the amplifier's ability to deliver current.An amplifier designed to deliver maximum output to a 6 ohm load can safely drive an 8 ohm one. But it will not be able to develop its maximum power.
Will a 4 ohm amp damage a 2 ohm speaker?
No, but it may be the other way around. Since you're using a 2 ohm speaker, don't expect the volume to be louder since the speaker uses twice as much power than a 4 ohm speaker does. If anything, I'd be cautious about the amp having the ability to handle the extra load. It's a myth. There is really no 4 Ohm amplifier on the market. And there never was. The amplifier will have an output impedance of around 0.04 ohms. In hi-fi we have always impedance bridging. Zout << Zin. That means the output impedance of the amplifier is much less than the input impedance of the loud speaker. The damping factor Df = Zin / Zout tells you what Zout is. Zout = Zin/Df. If the damping factor Df = 200 and the loudspeaker impedance is Zin = 4 ohms, the output impedance of the amplifier is Zout = 4 / 200 = 0.02 ohms. You see, there is no "4 ohm amplifier" on the market with a 4 ohm output impedance. Scroll down to related links and look at "Voltage Bridging or impedance bridging - Zout < Zin".
