Most speakers are rated at 4, 6 or 8 ohms, and cheaper receivers can sometime have issues driving low-impedance namely 4 ohm speakers.
But that rating is just a baseline. This speaker's impedance is rated at 6 ohms, but when you look at the graph you'll see the speaker's impedance peaks at 47 ohms at approximately 25 Hertz, plummets to 5 ohms at Hertz, rockets up to 35 ohms at 2 kHz, falls to around 9 ohms at approximately 7 kHz and so on.
Look at the graph one more time and you'll see this 6 ohm rated speaker is rarely 6 ohms. The rating is a shorthand that's mostly concerned with a speaker's lower impedances.
Using lower-ohm speakers without equipment that can support them may cause you to turn the amplifier all the way up, which can damage the equipment. Using mismatched speakers and amplifiers can cause problems when the receiver or amplifier is not up to the task. Take almost any modern speaker and connect it to any modern amplifier , and you'll have more than enough volume for your living room.
So, what's the advantage of a 4-ohm speaker versus a 6-ohm or 8-ohm speaker? Not a lot—just that low impedance sometimes indicates the amount of fine-tuning the engineers did when they designed the speaker. The impedance of a speaker changes as the sound goes up and down in pitch or frequency. For example, at 41 hertz the lowest note on a standard bass guitar , the impedance of a speaker might be 10 ohms. At 2, hertz the upper range of a violin , the impedance might be just 3 ohms.
The impedance specification seen on a speaker is just a rough average. Some of the more exacting speaker engineers like to even out the impedance of speakers for consistent sound throughout the whole audio range. Just as someone might sand a piece of wood to remove the high ridges of grain, a speaker engineer might use electrical circuitry to flatten the areas of high impedance.
This extra attention is why 4-ohm speakers are common in high-end audio but rare in mass-market audio. Before you buy a 4-ohm speaker, make sure the amplifier or receiver can handle it. It may not be clear, but if the amplifier or receiver manufacturer publishes power ratings in both 8 and 4 ohms, you're safe. A relatively inexpensive receiver might not be the best match for 4-ohm speakers.
It might function OK at low volume, but crank it up, and the amplifier might not have the power to feed the speaker. The receiver may shut itself off temporarily, or you may burn up the receiver. Some amplifiers and receivers feature an impedance switch on the back that you can use to switch between ohm settings. The problem with using this switch is that impedance is not a flat setting, it is a curve that varies. Using an impedance switch to "match" your equipment to your speakers intentionally cripples the full capabilities of your amplifier or receiver.
They are more taxing on the amplifier and actually require more powerful amplifiers to drive them properly. Amplifier output impedance specs, however, are generally given as rated values. Damping factor DF is technically the ratio of nominal loudspeaker impedance to the total source impedance that drives the loudspeaker.
This includes the impedance of the amplifier source and the speaker cable. A higher damping factor improves the transient response of the amplifier-speaker relationship.
Also, it allows the amplifier to damp slow down and stop the speaker from moving when the audio signal stops. This is particularly true in the bass frequencies. So for the sake of signal transfer, system efficiency, and speaker control, having a high speaker load impedance is paramount!
As a rule of thumb, a damping factor of 10 or more is optimal. Most systems will make this true. Passive loudspeakers do not have built-in amplifiers and do not require power to function. Rather, they rely on external amplifiers to provide them with signals strong enough to drive them properly. Passive speaker inputs are designed to expect speaker level signals. Active loudspeakers, then, can have line inputs, instrument inputs or even mic inputs.
Their built-in amplifiers will boost these low-level signals up to a level that can properly drive the speaker drivers. Know that the voltage bridging and damping factor information listed above still holds true for active speakers. However, this all happens inside the speaker rather than between the speaker and a separate power amplifier, as is the case with passive loudspeakers.
These different signal types actually require different load impedances. Rather, they will be in the ranges stated above, depending on the type of inputs available in the active loudspeaker. Though there are plenty of reasons including standardization and history for this, electrical current is a main reason. Remember that impedance is the resistance to electrical current. Higher impedance means less current, while lower impedance means more current.
Too much electrical current can be quite destructive to sensitive electronics and requires more heavy-duty components to handle it properly. This adds significant cost to audio equipment.
For example, passive speaker crossovers, which deal with speaker level high current signals, are built more robustly than active speaker crossovers that deal with line level low current signals and are built less robustly but with greater precision. Audio recording, processing, mixing, storage and playback all happen around nominal line level. Electronics including analog-to-digital and digital-to-analog converters are more easily cost-effectively designed at line level due to the low-current nature of line level.
A speaker is responsible for oscillating back and forth to reproduce audio signals as audible sound. Its motor made of a voice coil and magnetic structure requires speaker level signals with significant electrical energy to convert into mechanical wave energy sound waves.
The relatively robust nature of the speaker transducer means it needs more current. Lowering the impedance is one way of achieving this. The increase in current also causes speaker cable to be relatively thick lower gauge than typical audio line level or mic level cable. I just wanted to state how interconnected all the amplifier and speaker specifications, including impedance, are. In addition, this is only if the manufacturer is following the rather loose standard!
The standard is purposely made simple due to the incredibly complex nature of speaker impedance and the difficulty of mapping these complexities with a standard. The rated impedance values of speakers and their power amplifiers are often a way for manufacturers to state clearly or unclearly what their products are designed to handle appropriately. Lower impedances mean higher currents.
Higher currents mean more heat dissipation in the amplifier and speaker. This is why power amp manufacturers specify the lowest load impedance the lowest safe impedance value of the connected speaker s. Is there a way to get information on the actual impedance ratings across the entire frequency response of a speaker?
Unfortunately, manufacturers do not typically share the impedance graphs of their speakers. Fortunately, there are third-party testers that measure and publish impedance graphs of various loudspeakers. Stereophile is one such company. Check them out at stereophile. The 12 ohm load is actually quite a bit easier on your amp. I have an older Samsung bluray player that was also a 5.
All speakers are 3 ohms. If I am going to upgrade to a new receiver, what features should I look for most? A 3ohm load is hard for any amplifier. If you are buying a new receiver, make sure it has pre-outs to support that amp. I have 8ohms 2 pairs for ceiling speakers and a front speakers , what Wld be the matching Receiver?
Any receiver on the market will be compatible with 8ohm speakers. Hello Tom or Clint. What device do you recommend for hz cutoff to the subs.? Variable be nice. It looks like your receiver pushing full range to all the speakers and then only Hz on down to the sub. If you have the option, run the speaker wire to the subwoofers speaker wire inputs. Then run the wire back to the speakers. Hello Tom or Clint, I have a samsung hwk soundbar that has 2x wireless rear speakers my question is if I obtained another pair of samsung wireless speakers could I pair them to the same soundbar making 4 speakers connected wirelessly, many thanks.
It supports Atmos 5. I owned an LG home theater sometime in May Today three of its speaker series are no longer in use, i mean no more sound. Please help me what to do. One or both will need to be replaced. I have a Yamaha RX-V Wanting to purchase Krix Tropix 6. The specs of the speakers — Low Frequency Driver: Nominal mm 6.
It mostly depends on how loud you want your music and how far away you are sitting. As far as impedance, they will work together fine. An 8ohm load is exactly what your receiver wants to see.
But for background music, these will work perfectly together. Your email address will not be published. Comment Name Email Url. Menu Skip to content. Speaker Impedance Rating Explained That speaker impedance rating on your towers and bookshelf speakers is held up as a mystery—something strange and mystic, yet dangerous.
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Thanks for your time. Richard Hammond. December 25, at pm. December 26, at am. January 17, at pm. January 6, at am. January 21, at pm. January 22, at am. February 14, at pm. February 15, at pm. April 21, at am. May 5, at pm. February 27, at am. March 27, at pm. March 30, at am. June 5, at am. June 9, at pm.
I adjusted it to be correct for a 6-ohm speaker. June 25, at am. August 20, at am. August 17, at pm. November 2, at pm. November 7, at am. January 30, at pm.
February 11, at am. March 30, at pm. April 7, at am. So the question is, what ohms should I wire it for? July 11, at am. July 15, at pm. July 31, at pm. October 19, at pm. November 26, at am. December 27, at pm. February 27, at pm. March 23, at pm. April 5, at pm. Thank you so much for your God given expertise and God Bless you and your precious family! April 7, at pm.
April 4, at am. April 6, at am. May 1, at am. Sir i would like to ask if they are match since no idea about them. Thanks in advanced. May 8, at pm. Would this be ok. May 21, at am. Will this setup be okay or should i look for speakers with 8 ohm to be safe? Thank you for your time. August 29, at am. October 29, at pm. November 17, at pm.
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