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#1
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
I have a Cambridge Soundworks FPS2000 as the output for my computer's
audio. If I can, I would like to replace those 4 satalite speakers with the ones that I have left over from an RCA RV-9967 receiver, but I'm not sure if that would be okay. The 4 satalite speakers that came with the FPS2000 have 10watt @ 4ohm stamped on the magnet. There is no detailed documentation for the amp that comes with it, so I can only guess at the amp's rating based on the speakers that came with it. The 4 speakers from the RCA receiver that I would like to replace them with are its two fronts (50 watts @ 8 ohm) and its two rears (25 watts @ 16 ohm). Considering that the FPS2000's amp appears to have been designed for 4 ohm speakers, could I still use the 8 and 16 ohm speakers with it? Would that harm the speakers or the amp to do that? |
#2
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
On 2/8/2010 4:05 PM ShadowTek spake thus:
Considering that the FPS2000's amp appears to have been designed for 4 ohm speakers, could I still use the 8 and 16 ohm speakers with it? Would that harm the speakers or the amp to do that? Won't harm the amp, as it will basically be underloaded. You might notice lower volume with the higher-impedance speakers. -- You were wrong, and I'm man enough to admit it. - a Usenet "apology" |
#3
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
ShadowTek wrote:
I have a Cambridge Soundworks FPS2000 as the output for my computer's audio. If I can, I would like to replace those 4 satalite speakers with the ones that I have left over from an RCA RV-9967 receiver, but I'm not sure if that would be okay. The 4 satalite speakers that came with the FPS2000 have 10watt @ 4ohm stamped on the magnet. There is no detailed documentation for the amp that comes with it, so I can only guess at the amp's rating based on the speakers that came with it. The 4 speakers from the RCA receiver that I would like to replace them with are its two fronts (50 watts @ 8 ohm) and its two rears (25 watts @ 16 ohm). Considering that the FPS2000's amp appears to have been designed for 4 ohm speakers, could I still use the 8 and 16 ohm speakers with it? Would that harm the speakers or the amp to do that? No, the only potential harm would be if using speakers of *lower* impedence. geoff |
#4
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
On 2010-02-09, geoff wrote:
No, the only potential harm would be if using speakers of *lower* impedence. Thanks |
#5
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
On Tue, 9 Feb 2010 22:09:25 +0000 (UTC), ShadowTek wrote:
On 2010-02-09, geoff wrote: No, the only potential harm would be if using speakers of *lower* impedence. Thanks No harm, but keep in mind that the power rating of the amp will be halved. |
#6
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
"AZ Nomad" wrote in message ... No harm, but keep in mind that the power rating of the amp will be halved. *Less*, but not necessarily half for an amp with the usual unregulated power supply, and usually more than half on a continuous basis in any case. MrT. |
#7
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
Mr.T wrote:
"AZ Nomad" wrote in message ... No harm, but keep in mind that the power rating of the amp will be halved. *Less*, but not necessarily half for an amp with the usual unregulated power supply, and usually more than half on a continuous basis in any case. MrT. The amp's power 'rating' won't be changed at all. The maxiumum power output will be somewhat lower than that with the impedence speakers it was specced at, probably around half. geoff |
#8
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
On Thu, 11 Feb 2010 12:46:02 +1300, geoff wrote:
Mr.T wrote: "AZ Nomad" wrote in message ... No harm, but keep in mind that the power rating of the amp will be halved. *Less*, but not necessarily half for an amp with the usual unregulated power supply, and usually more than half on a continuous basis in any case. MrT. The amp's power 'rating' won't be changed at all. The maxiumum power output will be somewhat lower than that with the impedence speakers it was specced at, probably around half. Half the resistance and the power at the point where the amp begins to clip will be halved. |
#9
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
On Wed, 10 Feb 2010 19:28:44 -0600, AZ Nomad wrote:
On Thu, 11 Feb 2010 12:46:02 +1300, geoff wrote: Mr.T wrote: "AZ Nomad" wrote in message ... No harm, but keep in mind that the power rating of the amp will be halved. *Less*, but not necessarily half for an amp with the usual unregulated power supply, and usually more than half on a continuous basis in any case. MrT. The amp's power 'rating' won't be changed at all. The maxiumum power output will be somewhat lower than that with the impedence speakers it was specced at, probably around half. Half the resistance and the power at the point where the amp begins to clip will be halved. doh. I mean, double the resistance and the power will be halved. |
#10
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
"geoff" wrote in message ... No harm, but keep in mind that the power rating of the amp will be halved. *Less*, but not necessarily half for an amp with the usual unregulated power supply, and usually more than half on a continuous basis in any case. The amp's power 'rating' won't be changed at all. Better read some real life specs then. The power rating will *almost always* depend on the rated impedance, with any manufacturer worth a dime giving you specs for 4 and 8 ohms, and for those amps that can handle it, 2 ohms. The maxiumum power output will be somewhat lower than that with the impedence speakers it was specced at, probably around half. I'm glad you used "probably", since that doesn't actually contradict what I wrote. MrT. |
#11
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
"AZ Nomad" wrote in message ... No harm, but keep in mind that the power rating of the amp will be halved. *Less*, but not necessarily half for an amp with the usual unregulated power supply, and usually more than half on a continuous basis in any case. The amp's power 'rating' won't be changed at all. The maxiumum power output will be somewhat lower than that with the impedence speakers it was specced at, probably around half. Half the resistance and the power at the point where the amp begins to clip will be halved. If only it were as simple as you! What part of "for the usual unregulated power supply", and for real life transformer losses and for actual *transistor load curves*, and for heatsink/cooling design compromises affecting continuous power output are you unfamiliar with? Better to not comment on things you are unfamiliar with IMO. MrT. |
#12
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
"AZ Nomad" wrote in message ... Half the resistance and the power at the point where the amp begins to clip will be halved. doh! You got that last bit right at least I mean, double the resistance and the power will be halved. For those living in virtual reality anyway. In the real world things get slightly more complicated. MrT. |
#13
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
On Thu, 11 Feb 2010 18:04:31 +1100, Mr.T MrT@home wrote:
"AZ Nomad" wrote in message ... Half the resistance and the power at the point where the amp begins to clip will be halved. doh! You got that last bit right at least I mean, double the resistance and the power will be halved. For those living in virtual reality anyway. In the real world things get slightly more complicated. Not really. if you've ever in your life looked at an amp's specficiations given for 4 and 8 ohm loads, the 4 ohm load's power is about double. |
#14
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
AZ Nomad wrote:
For those living in virtual reality anyway. In the real world things get slightly more complicated. Not really. if you've ever in your life looked at an amp's specficiations given for 4 and 8 ohm loads, the 4 ohm load's power is about double. Nope, 1.6 times 8 Ohm power in 4 Ohm is a better real world first guesstimate. Kind regards Peter Larsen |
#15
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
AZ Nomad wrote:
On Thu, 11 Feb 2010 18:04:31 +1100, Mr.T MrT@home wrote: "AZ Nomad" wrote in message ... Half the resistance and the power at the point where the amp begins to clip will be halved. doh! You got that last bit right at least I mean, double the resistance and the power will be halved. For those living in virtual reality anyway. In the real world things get slightly more complicated. Not really. if you've ever in your life looked at an amp's specficiations given for 4 and 8 ohm loads, the 4 ohm load's power is about double. Yep ABOUT. geoff |
#16
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
Mr.T wrote:
"geoff" wrote in message ... No harm, but keep in mind that the power rating of the amp will be halved. *Less*, but not necessarily half for an amp with the usual unregulated power supply, and usually more than half on a continuous basis in any case. The amp's power 'rating' won't be changed at all. Better read some real life specs then. The power rating will *almost always* depend on the rated impedance, with any manufacturer worth a dime giving you specs for 4 and 8 ohms, and for those amps that can handle it, 2 ohms. Yep, and those ratings won't be changed. The maxiumum power output will be somewhat lower than that with the impedence speakers it was specced at, probably around half. I'm glad you used "probably", since that doesn't actually contradict what I wrote. Just expanding a little on what you wrote. geoff |
#17
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
"AZ Nomad" wrote in message ... For those living in virtual reality anyway. In the real world things get slightly more complicated. Not really. if you've ever in your life looked at an amp's specficiations Why not try looking at some ACTUAL test results instead. (Or if you had any idea how to, you could try making some measurements of your own.) given for 4 and 8 ohm loads, the 4 ohm load's power is about double. Yes, ABOUT. At least you now agree things are a little more complicated than you first thought. MrT. |
#18
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
On Fri, 12 Feb 2010 13:50:26 +1100, Mr.T MrT@home wrote:
"AZ Nomad" wrote in message ... For those living in virtual reality anyway. In the real world things get slightly more complicated. Not really. if you've ever in your life looked at an amp's specficiations Why not try looking at some ACTUAL test results instead. (Or if you had any idea how to, you could try making some measurements of your own.) given for 4 and 8 ohm loads, the 4 ohm load's power is about double. Yes, ABOUT. At least you now agree things are a little more complicated than you first thought. Yes, "about". An 100W amp at 4 ohms may do about 60W at 8 ohms Why are you so ****ing anal about wether or not it is exactly half? |
#19
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
On 2/11/2010 7:21 PM AZ Nomad spake thus:
On Fri, 12 Feb 2010 13:50:26 +1100, Mr.T MrT@home wrote: "AZ Nomad" wrote in message ... For those living in virtual reality anyway. In the real world things get slightly more complicated. Not really. if you've ever in your life looked at an amp's specficiations Why not try looking at some ACTUAL test results instead. (Or if you had any idea how to, you could try making some measurements of your own.) given for 4 and 8 ohm loads, the 4 ohm load's power is about double. Yes, ABOUT. At least you now agree things are a little more complicated than you first thought. Yes, "about". An 100W amp at 4 ohms may do about 60W at 8 ohms Why are you so ****ing anal about wether or not it is exactly half? It's in his job description, apparently. -- You were wrong, and I'm man enough to admit it. - a Usenet "apology" |
#20
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
AZ Nomad wrote:
On Fri, 12 Feb 2010 13:50:26 +1100, Mr.T MrT@home wrote: Yes, ABOUT. At least you now agree things are a little more complicated than you first thought. Yes, "about". An 100W amp at 4 ohms may do about 60W at 8 ohms Why are you so ****ing anal about wether or not it is exactly half? Because thinking it ought to be "about" or "exactly" half indicates a less than complete oomprehension of how a "standard" poweramp with an unregulated powersupply works. Kind regards Peter Larsen |
#21
Posted to rec.audio.tech
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What speakers can I use with my 4 ohm amp?
"Peter Larsen" wrote in message k... Why are you so ****ing anal about wether or not it is exactly half? Because thinking it ought to be "about" or "exactly" half indicates a less than complete oomprehension of how a "standard" poweramp with an unregulated powersupply works. Thanks Peter, I'm glad someone realises pointing out incorrect, unqualified statements is not just "****ing anal", even if those who are wrong like to justify it to themselves that way. MrT. |
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