4 ohm amplifier with 8 ohm speakers

Most guitarists would probably not consider themselves experts when it comes to the subject of natural sciences. Although you may have a vague idea of the different scientific phenomena that hide behind every note you play, your main focus as a player — quite naturally — is usually on the music itself, and the instrument. Boring science is just something that would get in the way. And yet, consider this: the everyday electric guitar player probably namechecks a bunch of famous physicists regularly, even though they might not be overly au fait with the scientific laws associated with these long-dead genii in white coats. Hertz, Ohm, Volt, Ampere — these are all familiar names that belong in the basic vocabulary of any slightly technically-minded guitarist. These things duly considered, it can be highly insightful for you to get to know the stories — and the theories — behind those names in a bit more detail.

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• Electrical – the Danger in Plugging an 4 Ohm Speaker into an 8 Ohm Amplifier
• wire up speakers to equal 4/8 ohm loads
• ProSoundWeb Community
• 4ohm amp to 8ohm sub?
• 8 Ohm Amps and 4 Ohm speakers - will they work?
• Speaker Impedance, Power Handling and Wiring
• Can I run my 4ohm speakers through an 8 ohm stereo receiver safely?
• How to stop worrying about speaker impedance

WATCH RELATED VIDEO: How to Wire Subwoofers 1 ohm 2 ohm 4 ohm 8 ohm Series Parallel Amplifier Wiring Tutorial

Electrical – the Danger in Plugging an 4 Ohm Speaker into an 8 Ohm Amplifier

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It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter [email protected] Start date Feb 5, At moderate volume level, in terms of getting better sound quality which impedance speaker should we buy?

Fantastic Well-Known Member. Impedance does not determine good sound! Impedance is a characteristic of the speaker and your power amp should be capable of handling it.

In any case no speaker has the same impedance at all frequencies. Like a " nominally " 8 ohm speaker might sometimes be 5 ohms or even lower at it's lowest point at some frequency. I've attached the impedance curve of a speaker that could be called 6 ohms but see how low it goes. Almost 3 ohms at Hz! That's why some amps have difficulty driving some 6 or 8 ohm speakers if their impedance at some frequencies drop lower than they can handle. However most speakers will be reasonably close to the stated ' nominal' impedance.

But a 6 ohm speaker could easily drop to 4 ohms at some point! Look for the impedance curve that might be given in some reviews. Click to expand Majority of speaker manufacturers make "nominally" 8 ohm speakers Jamo for instance makes "nominally" 6 ohm speakers Magnepan and Martin Logan the ESL guys make "nominally" 4 ohm speakers This does not mean one sounds better than the other. So why do the vast majority of speaker manufacturers stick to designing and selling 8 ohm speakers?

The answer is most likely, wider market and acceptance due to the fact that most amps out there are spec'ed reasonably well at 8 ohm loads. Are the speaker guys lying when they say nominally "x" ohms, but their products present a variation of this spec? The answer is no. Their claim is the speaker will present a load of "x" ohms or higher for most of your content music or movies but at times it may dip to a lower value.

How low can it go? This may be brief or for a slightly longer duration of time depending on the content playing. Music is generally a good mix of all frequencies, peaking at different times.

In some cases like western classical, EDM and heavy metal, frequencies can peak at the same time. Movies are a different ball game.

There is background music, vocals, car crashes, explosions, etc mixed in to complement the visual image. Here it may be pertinent to hold a range of frequencies typically low frequencies for a slightly longer duration to simulate the sound as close to the real thing.

Having said this, most speakers are well behaved sound boxes. Many manufacturers indeed spec how low the impedance may go. If the amp's power supply stage is well designed with a high current capacity it will be able to deliver the required momentary current.

Let's take an example. The stand mounts I have at home are spec'ed as follows 8 ohm 3. My Integrated Amp claims 70W at 8 ohm and W at 4 ohms.

This means at max power rating it can momentarily source 8. Now to a real world scenario. Look back at the SPL rating of the speaker; say 88dB. In a home setting with the listening distance at 8 ft from speaker plane assume you want the SPL to be 80dB with a headroom of 15dB due to variation in content. For this you need about 30W of power to be supplied to each speaker. When the content playing out of the speaker is presenting an impedance of 8 Ohms, the current requirement is 3.

When the content becomes "heavy" and the speaker start presenting a nastily low impedance of 3. If I am cranking the power beyond these limits, I better be far away from speakers or I have gone deaf. They are designed this way because we may accidentally turn the volume knob to an unreasonable level. Cheers, Raghu. Joined Jan 16, Messages Points 28 Location bangalore. My preference is for 8 ohm speaker as AVR does not have to strive too hard to drive it. Having said that, even some good speakers impedance goes very low at certain frequencies.

Key is to get the impedance curve from online reviews or ask the manufacturer directly and then make a decision. Pls keep in mind sensitivity too anything 90 and above is better. Joined Aug 12, Messages Points 43 Location india. Some speakers of branded models, specified the impedance on it's back label as : ohms. This mean what? Is it has better tolerance? Any special voice coil winding?

Thank you. Sunder, I would interpret it as 8 Ohm nominal impedance and 4 Ohm min. Joined Sep 12, Messages 2, Points 83 Location hyderabad. Mostly all amps will happily to accept a 4 Ohms load, 8 Ohms is the standard and 6 Ohms is even easier to drive without any damage, and it is very flexible too.

I think that some speaker is specified at 6 Ohms as it is still considered as safe to most commercially avail amps and provides an extra dB of headroom over the 8 Ohm rating. Amp claims 70W at 8 ohm and W at 4 ohms. Raghu, that is a very good post, thank you.

You skipping the sqrt for simplification? I guess I must have been drunk when I did these calculations and wrote abou. I have had a similar dilemma for some time. My listening is at dB at a distance of 9 feet from the speakers. The sound is good but I feel the need for better soundstage. The Denon puts out 45W at 8 ohms and 70W at 4 ohms. So after a lot of deliberation I have commissioned a custom built small floor-stander with 3 way configuration. I will be also adding a subwoofer later on it will become two subs to take care of the frequencies below Hz.

The subwoofer will be have an AB class plate amp of W rating so it should be able to take care of the impedance dips. The main thing is that the calculated efficiency of the main speakers is 91Db and impedance is 4 ohms. My rough estimation is that I will need to run my amps at about Watts at the maximum. So i will have some headroom to go up to 80Db if needed. Hopefully everything will work out as planned.

I will post my experiences in a separate thread once the system is up and running. I guess I must have been drunk when I did these calculations and wrote about Cheers, Raghu. Joined Dec 17, Messages Points Location hyderabad. Just to add to the above, usually every driver has a resonant frequency. And they're crossed over to not drop close to that frequency. The same cannot be avoided for bass drivers, as we have a size limitation for the driver considering that our small rooms can't accommodate mammoth 18 inch drivers.

So as the bass driver starts reaching close to its resonant frequency, it's resistance to vibration starts dropping. So a bass driver with a nominal impedence of 8 ohms, starts dropping to lower impedence sometimes even 2 ohms, as it start a digging deeper.

Hence a lot of folks advocate using subs in a HT system, so that the AVR does not see these nasty impedence drops, as it has to run multi channel speakers.

It is for the same reason, that a lot of folks use high power SS amps for bass drivers and tubes for mid rnage and treble. Yogesh Well-Known Member. Are 8 Ohms speakers easier to drive OR 4 Ohms? Shouldn't speakers with less Impedance easier to drive?

wire up speakers to equal 4/8 ohm loads

Solid-state Amps: Most solid-state amplifiers would rather look at an open circuit no speaker at all than a load. Therefore, you can usually use a load that is higher than the recommended load. Do not use a lower impedance load, as this could cause serious damage to your SS amp. Tube Amps: On the other hand, most tube amplifiers need a load to avoid transformer or tube socket damage. If a mismatch can not be avoided on a tube amp, it is better to go towards a lower impedance rather than too high of a speaker impedance. This may stress the tubes some, but, tubes are cheaper than transformers.

ProSoundWeb Community

The speaker ohm rating is an indication of the speaker's AC impedance, which varies with the frequency of the input signal. This variation of the speaker's impedance can be seen on the speaker's spec sheet impedance curve. This is why the spec sheet indicates this speaker to have an 8 ohm "nominal impedance. Most of the speakers are available in alternative ohm ratings usually 4, 8 an 16 ohm versions. This variety allows for more flexibility in matching the overall equivalent impedance of your speaker s to the output impedance of the amplifier. It is important that the output impedance of your amplifier matches the overall equivalent impedance of your speaker s for maximum power transfer and so that you do not damage the amplifier. When using more than one speaker with your amp the equivalent overall impedance changes depending on how the speakers are wired. Speakers also have a wattage rating which indicates how much power from the amp they can handle before being damaged.

4ohm amp to 8ohm sub?

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8 Ohm Amps and 4 Ohm speakers - will they work?

Confused about speaker Ohm ratings, the word impedance, and what it all means? As it so happens, over many, many years some unregulated not strict standards have developed for the speaker impedances used in consumer electronics. Speakers are never exactly 8 ohms or 4 ohms, for example. The Ohms rating for a speaker helps you match it with the electronics that can power it correctly without having to worry about small differences. When choosing a speaker the impedance, listed in units of measurement called Ohms, is used as a good approximate matching guideline for stereo equipment. This graph shows the actual impedance for an 8 ohm speaker measured and plotted on a graph over the range of audio frequencies.

Speaker Impedance, Power Handling and Wiring

Descriptive Audio. This is one of those questions that get asked a lot. In this blog post, we will be explaining everything you need to know about these two types of speakers, including the differences between them, and why impedance matters. A lower impedance rating means less power will be lost in transmission, but this can also mean more amplifier power is needed for adequate volume levels. The lower the impedance, the more power it takes for adequate volume levels and vice versa. A typical home speaker will have an impedance in the range of 4 to 8 ohms or multiples thereof. This analogy applies to speakers as well because turning up the volume increases power consumption and reduces sound quality.

Can I run my 4ohm speakers through an 8 ohm stereo receiver safely?

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How to stop worrying about speaker impedance

RELATED VIDEO: Can I Use A 4-Ohm Speaker With an 8-Ohm Receiver? - Speaker Impedance

For most people, though, it comes down to an 8-ohm speaker or a 4-ohm speaker. How does it factor into audio quality? How do 4-ohm speakers stack up against the competition? In the river, there might be beaver dams, rock formations, or fallen trees that oppose the flow of the water. The strength of that opposition is what is measured by the impedance rating. The lower the rating, the more voltage allowed to flow from your amp into your speaker wires.

If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here. I have a speaker with 6 ohm rating. So basically I want to match 6 ohm speaker with 4 ohm ampliflier. But i am not able to do this as all the ampliflier in the market have different rating in different channel for eg a two channel ampliflier will have 4 ohm 8 ohm 12 ohm and 16 ohm my question is that why they don t have 4 ohm rating in all the Chanel I.

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