Hello. I have Alpine sps-170a's in the front and alpine sps-690a's in the rear... the sps-170a's are rated at 40watts rms and the sps-690a's are rated at 50watts rms. I am looking at a pioneer amp that outputs 50x4watts rms (model gm-6000f). Will the amp blow my front speakers since the amp outputs 50watts rms and the speakers are only 40watts rms?
Replies (7)
UKinstaller on 04/21/2005 12:49:19
naw you'll be perfectly fine, just set the gains on the amp a little lower than you might with some more powerful speakers. it will work great.
-UK
toyotaguy on 04/21/2005 15:40:27
Would an Alpine MRP-F240 be better for the speakers I have? It is rated at 40watts rms x 4.
UKinstaller on 04/21/2005 18:10:59
that's the amp i use now to run my component speakers. i have them bridged to run 80x2 and it sounds really nice. it's a good, inexpensive amp. have you checked out your local circuit city?? they are selling them on clearance, i got mine for $90 (i'm an employee, but it shouldn't run you much more)
-UK
toyotaguy on 04/21/2005 18:17:20
What about the Verge 4 channel amp? The VGA460..
swez on 04/21/2005 19:02:00
Not a problem as long as the amplified signals are clean and not severely clipped. A 40 Wrms speaker can handle a clean 60-75 watt audio signal all day long if we don't try to push too much low freq energy into them. Depends on the speaker size and how large the voice coil is to manage the heat.
Swez
toyotaguy on 04/21/2005 19:15:41
Swez.... the speakers I'm worried about are Alpine SPS-170a's.
swez on 04/21/2005 19:45:52
Well, they are rated at 40Wrms, but can take short bursts well beyond that. After all, music programming is very dynamic in nature. It's not a steady voltage supply to amp/speakers like test tones. You can easily calculate power to each speaker with a voltmeter and knowing the voltage and resistance of the load (speaker) we get a pretty accurate wattage number to each speaker.
Even though the speakers are rated for 40 watts of contious power, they can take much more transient power in short burst. That is why using a larger amp is a good thing. The transient peaks are clean and not heavily clipped. This is actually good for a speaker. A 25Wrms signal, heavily clipped can damage a 50Wrms speaker in time with excess heat to coils.
In the case noted above, you should be fine with a slightly larger amp, as long as you don't overdrive the amp into clipping.
Swez
Replies (7)
UKinstaller on 04/21/2005 12:49:19
naw you'll be perfectly fine, just set the gains on the amp a little lower than you might with some more powerful speakers. it will work great.
-UK
toyotaguy on 04/21/2005 15:40:27
Would an Alpine MRP-F240 be better for the speakers I have? It is rated at 40watts rms x 4.
UKinstaller on 04/21/2005 18:10:59
that's the amp i use now to run my component speakers. i have them bridged to run 80x2 and it sounds really nice. it's a good, inexpensive amp. have you checked out your local circuit city?? they are selling them on clearance, i got mine for $90 (i'm an employee, but it shouldn't run you much more)
-UK
toyotaguy on 04/21/2005 18:17:20
What about the Verge 4 channel amp? The VGA460..
swez on 04/21/2005 19:02:00
Not a problem as long as the amplified signals are clean and not severely clipped. A 40 Wrms speaker can handle a clean 60-75 watt audio signal all day long if we don't try to push too much low freq energy into them. Depends on the speaker size and how large the voice coil is to manage the heat.
Swez
toyotaguy on 04/21/2005 19:15:41
Swez.... the speakers I'm worried about are Alpine SPS-170a's.
swez on 04/21/2005 19:45:52
Well, they are rated at 40Wrms, but can take short bursts well beyond that. After all, music programming is very dynamic in nature. It's not a steady voltage supply to amp/speakers like test tones. You can easily calculate power to each speaker with a voltmeter and knowing the voltage and resistance of the load (speaker) we get a pretty accurate wattage number to each speaker.
Even though the speakers are rated for 40 watts of contious power, they can take much more transient power in short burst. That is why using a larger amp is a good thing. The transient peaks are clean and not heavily clipped. This is actually good for a speaker. A 25Wrms signal, heavily clipped can damage a 50Wrms speaker in time with excess heat to coils.
In the case noted above, you should be fine with a slightly larger amp, as long as you don't overdrive the amp into clipping.
Swez
Copyright ClubKnowledge 2009 * All Rights Reserved
