Our primary goal is insightful discussion of equipment, sources, music, and audio concepts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more! Most amps that I see are only able to push 8 ohms speakers continiously so the reason I ask. You can buy excellent speakers in both 4 and 8 ohm and it's up to the designer what compromises they're willing to make … I think it was meant in the context of having an amp that wasn't necessarily up to the task of lower impedance. To drive 4 ohm speakers safely (especially if they're low efficiency <90dB) you need a high quality, high current amplifier which can be expensive. Considering most car amps are ideal for 4 ohms speaker, these tend to work best. Power is a combination of voltage and current, so to provide more current to the speaker, an amplifier must have a higher power rating. Not worth it. Supporting Members list unlimited gear with no listing fees in the Classifieds, get instant Keyword Alerts, and get Free Shipping at the TalkBass Store. It's not something I would do, even if the amp is rated @ 2 ohms - other than just temporarily, in a pinch... That would also mean that you'd get the same power from the amp in 4 ohms mono / 2ohms stereo. Is the RBH Sound SVTRS Audioholics New Reference Speaker. Running at 2 ohms is a different story. I will assume you are talking about loudspeaker sensitivity. "Practicing an art, no matter how well or badly, is a way to make your soul grow, for heaven's sake. @8ohms it might output 100 watts but at 4 ohms it might output 190 watts. As long as your amp is capable, you can use a 4ohm speaker to get more out of your amp so to speak. This only works if the speakers' nominal impedance is 8 ohms. Thanks guys! A 200W amp isn't likely to have that issue relative to the original question, though if one were using something that is fine with an 8 Ohm speaker but might be pushing its limits with a 4 Ohm then clipping would be more likely. The 4 ohm cab will be louder, but not twice as loud as the 8ohm. For a better experience, please enable JavaScript in your browser before proceeding. However the amp has to provide more current to the four ohm load so the output transistors have to be more robust. The lower the impedance, the more easily electricity (the signal or music) flows through the speaker. I know its out of topic but I just always wonder. JavaScript is disabled. A 96db rated, 8 ohm speaker driven with 1 watt is as loud as a 93db rated 4 ohm driven with 2 watts, or 90db rated 2 ohm speaker driven by 4 watts. However, if your equipment isn't stable down to 4 Ohms, you could burn out the amp or cause undue distortion. In car audio, due to the low supply voltage, 4 ohm speakers make sense. Not good to run at 2 Ohms for any length of time. No, they're not inherently better. Be careful if you try to combine a 4-ohm speaker and 8-ohm speaker to the same amplifier because you could … generally speaking you need a more robust amplifier to handle 4 ohms. If you plug in an easy load, a nightlight, into your wall socket, it will allow only a few watts to flow. Both will sound, I'm sure, great, but have radically different designs which lead to different sensitivity measures. Good to know this. For a better experience, please enable JavaScript in your browser before proceeding. Your amplifier is like a wall socket. Gold Supporters see zero ads! Sing in the shower. 8 ohms FTC 20 Hz-20 kHz 0.1% THD: 2600 Watts 8 ohms EIA 1 kHz 0.1% THD: 2800 Watts 4 ohms EIA 1 kHz 1% THD: 4000 Watts Distortion (Typical) 20 Hz-20 kHz: 10 dB below rated power: Less than 0.02% 4 ohm, less than 0.01% 8 ohms 1 kHz and below: full rated power: Less than 0.02% 4 ohm, less than 0.01% 8 ohms A 4 ohm speaker with a low phase angle is by far an easier load to drive than a 8 ohm speaker with a high phase angle. Speakers have dips in their impedance plot, some of them severe. That is the big difference between the two speakers. You will get an enormous reward. Bridging the amp is essentially summing two amps into one.Bridging at 4 ohms is the same as running both channels at 8 ohms. Its no that less impedance is better, more so that it is a product of design. Quick question guys...I recently bought speakers with 6 ohms nominal impedance and 4 ohms minimal impedance. It's one problem for your server to have an issue but totally different for it to, day after day, continue having issues that don't get fixed. Thank you for your support! I know that the current from the output stage of an amplifier required for a 4 ohm speaker is greater than that of an 8 ohm speaker. It has potential power to supply to whatever load is put on it. A situation that is likely to occur when the amp is already in place and then speakers that exceed that capability are chosen after the fact. A 96db rated, 8 ohm speaker driven with 1 watt is as loud as a 93db rated 4 ohm driven with 2 watts, or 90db rated 2 ohm speaker driven by 4 watts. For example a typical car amp could be rated @ 50 x 2 @ 4 ohms, but only 75 x 2 @ 2 ohms. Thanx Bob and greenboy! KJung I think your layman's understanding is 100% correct. A 4 Ohm speaker presents a bigger load to an amplifier (less resistance) and therefore an amplifier that can dip down will give you more watts running a 4 Ohm speaker than an 8 Ohm. C. 2 -8 ohm cabs will be louder than 1 -4 ohm D. relatively, if you gave the cabs a volume level/loudness/rating, 1-8 ohm at say level 2, the 1-4 ohm would be 3, but 2-8 ohm would be 5. Can a Marantz PM6004 adequately deliver 4Ohms like it's rated? The issue is that the amp does not necessarily have to be more powerful to drive the 4 ohm speaker. For example. ok but then what about if WE COMPARE IT TO A RIVER?, we had the 100 ohm aplifier it doesnt mean then that listen to 4 ohm the current is more natural? TalkBass utilizes technology from //Commerce that may give us a small affiliate commission on purchases made via links on our site. But many times good crossovers and drivers (read good speaker) will produce a speaker that is 4 ohms or less. There's a reason those Seas Excels are so damn good. Talking about speaker impedance without including phase angle is meaningless. Budget speakers are usually 8 ohm for broad compatibility with all amps but just the fact that they're 8 or 4 ohm doesn't make them any better or worse than anything else. They are just arbitrary definitions of the threshold of clipping. Considering most car amps are ideal for 4 ohms speaker, these tend to work best. Accoding to ohms law Volts X Amps = Watts and is so derived in other ways such as Volts(squared)/ohms = watts. Nothing that the speaker's doing will make it sound better. The Mo'Bass is most likely 450 watts a side at 8 ohms, hence the 900 watts bridged at 4. Also, 4 ohms does not present much electrical resistance to the amplifier so a low quality amp may put out too much current too quickly and overheat. Chris Heinonen, ISF Level II Certified Calibrator. 4 Ohms gives more power without hurting the amp and of course at 2 Ohms you are taking risk even when they claim that the amp can handle it. Talking about speaker impedance without including phase … Secrets of Home Theater and High Fidelity, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. To clarify, I'm not interested in which cab is louder/softer. If you're talking about THD figures in power specs, do not confuse them with THD performance specs. Loudspeaker Impedance: Series vs Parallel Connections, Movies, Ultra HD Blu-ray Discs, DVDs & Theatricks. The difference is almost always miniscule at best, so don't loose any sleep or hearing over it. I don't remember seeing more than one other 16 ohm speaker, and that might have been some vintage model. i see the thing is amps over lets say 150 watt in 8 ohm are very expensive my friend, maybe this may even be look at that point that speakers of 4 ohm are rather for people with good money in the pocket in my cheap experience the ohm speakers use to sound more sweeted than 4 ohm with a 100 watt ohm amplifier There is far more to this then 4 ohm verses 8 ohm and everyone keeps forgetting the affects of phase angle. Page created in 0.296 seconds with 22 queries. B. Not good to run at 2 Ohms for any length of time. Types of Connections: 4 Ohms and 8 Ohms. As long as your amp is capable, you can use a 4ohm speaker to get more out of your amp so to speak... An amp that is 4 Ohm capable will have no issue driving an 8 Ohm load, so the amp side is not so much a factor unless it is insufficient for the load. I am talking specificaly about bridging a stereo amp by the way. What do you call these darn things and where can you buy them. Anyone?? Most transistor amplifiers are able to deliver up to twice as much power into a 4-ohm speaker than into an 8-ohm one. In general, speaker impedance (which cannot really be defined by a single number) is completely uncorrelated with sound quality.

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