Can I damage my speakers with too powerful an amp or with different frequency response? - AVS Forum
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Old 07-21-2012, 05:23 PM - Thread Starter
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Hi all. I'm new here and trying to learn while setting up a theater. I did a search and found some good info but I wanted to ask a more specific question(s)

Can I damage 125w speakers with a 250w amp? I assume I can if I get stupid or reckless or suddenly go deaf and crank the volume to the sky. So I'm taking under normal use. I'm also assuming that with 6 Ohm speakers the amp outputs 250w
The speakers are Monitor Audio RX6 & RX Centre and RXFX. Amp Emotiva XPA-5
Also is there a potential problem with the mismatched frequency response? Are there adjustments I can/should make?
I'll be using the Yamaha RX-V1700 preouts for now but plan on moving into a pre/pro in the future (if funds allow).
Any help or advice would be greatly appreciated.



Speaker specs:
RX6


System Format: 2 1/2 Way
Frequency Response: 38Hz - 35kHz
Sensitivity (1W@1M): 90dB
Nominal Impedance: 6 Ohms
Maximum SPL (dBA): 114.8
Power Handling (RMS): 125W
Recommended Amplifier Requirements (RMS): 40-125W
Bass Alignment: Dual Chamber, Bass reflex with differential tuning.
Twin HiVe®II port System
Tweeter Crossover Frequency: LF: 700Hz
MF/HF: 2.7kHz
Drive Unit Complement: 1 x 6" RST® Bass driver.
1 x 6" RST® Bass/Mid driver.
1 x 1" (25mm) C-CAM® gold dome tweeter
External Dimensions:
(H x W x D)
inc. plinth & feet 905 x 275 x 310 mm
(35 5/8 x 10 13/16 x 12 3/16 inch)
Individual Weight: 16.4 Kg (36.13 lb)

RX Centre

System Format: 2 1/2 Way
Frequency Response: 45Hz - 35kHz
Sensitivity (1W@1M): 90dB
Nominal Impedance: 6 Ohms
Maximum SPL (dBA): 114.8
Power Handling (RMS): 125W
Recommended Amplifier Requirements (RMS): 40-125W
Bass Alignment: Sealed Cabinet
Tweeter Crossover Frequency: LF: 500Hz
MF/HF: 3.0kHz
Drive Unit Complement: 1 x 6" RST® Bass driver.
1 x 6" RST® Bass/Mid driver. 1 x 1" (25mm) C-CAM® gold dome tweeter
Product External Dimensions:
(H x W x D) 185 x 500 x 200 mm
(7 5/16 x 19 11/16 x 7 7/8 inch)
Individual Weight: 9.62 Kg (21.13 lb)

RXFX

System Format: 2 Way
Frequency Response: 60Hz - 35kHz
Sensitivity (1W@1M): 89dB
Nominal Impedance: 6 Ohms
Maximum SPL (dBA): 111.8
Power Handling (RMS): 80W
Recommended Amplifier Requirements (RMS): 10-80W
Bass Alignment: Sealed Cabinet
Tweeter Crossover Frequency: 2.1kHz
Drive Unit Complement: 1 x 6" RST® Bass/Mid driver.
2 x 1" (25mm) C-CAM® gold dome tweeters
Product External Dimensions:
(H x W x D) 250 x 300 x 120 mm
(9 13/16 x 11 13/16 x 4 3/4 inch)
Individual Weight: 4.69 Kg (10.38 lb)


Emotiva XPA-5 Specs:


Number of channels: 5
Signal to Noise Ratio:
1 watt: > 97 dB
Full power: >111 dB
Input impedance:
unbalanced: 23.5 kohms
balanced: 33 kohms
Transformer rating: 1,200VA
Secondary capacitance: 60,000uF
Output devices: 6 per channel
Topology: fully discrete, dual differential, high current, short signal path Class A/B
Power output (all channels driven):
300 watts RMS @ 4 ohm (0.1% THD)
200 watts RMS @ 8 ohm (0.1% THD)
Rated power bandwidth: 20 Hz to 20 kHz with less than .05 dB deviation at rated power
Broadband frequency response (-3 dB): 5Hz to 150kHz
Amplifier gain: 32 dB
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Old 07-21-2012, 06:23 PM
 
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Everybody can fry a speaker just like pretty much anybody can blow up an engine. But like an engine, the individual has to want to damage the speaker. If you're listening at theater levels, you're not going blow these speakers. If you're trying to rock the backyard from the inside of the home and you have the speakers cranked to max Amp output and forgotten, sure, the potential to cause speaker damage is there. But again, the speakers would be damaged because someone choose to abuse them.

In your case, you'd need about 32-64w to push your speakers to >102dB @ ~4m. IIRC, THX reference is a room SPL of 85dB.

Are you planning on rocking the backyard from the inside of the house, putting the Amp on max output and leaving the volume control at max?
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Old 07-23-2012, 02:35 PM - Thread Starter
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That's what I figured as far as power. Don't go crazy and I should be fine. I don't plan to crank it to 11
What about the differences in freq. response? Is there a problem there?
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Old 07-23-2012, 02:52 PM
 
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Quote:
Originally Posted by KnifeGuy View Post

That's what I figured as far as power. Don't go crazy and I should be fine. I don't plan to crank it to 11
What about the differences in freq. response? Is there a problem there?

Not quite sure what you mean with your above comment about frequency response. If I understand your question, it's all about your system accurately reproducing sound which most systems will easily do. If you stick with the same manufactures speakers in a given product line such as the Monitor Audio RX series, I don't see a problem with timbre matching or what I think you're calling "freq. response."

Throw in a decent Klipsch subwoofer and you should be good to go as to a matching set with more than enough giddy-up to rock your home theater experience.

As a suggestion, for a $125.00 per speaker more, if your budget can swing it, consider those RX8's as your Amp. choice can easily handle the 4 ohm load. If I'm going do it, I always try to go as big as I can. With a 32 Hz capability, one will only need the subwoofer when watching movies. To me, you have a very well match speaker/Amp setup that your friends will envy, but only if you go with the RX8's. tongue.gif

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Old 07-23-2012, 03:29 PM
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I think he is concerned that the speakers are rated to handle a Frequency Response of 38Hz to 35KHz while the amplifier has a frequency response from 5Hz to 150KHz, Will signals below 38Hz or above 35KHz damage the speakers.
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Old 07-23-2012, 03:36 PM
 
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Quote:
Originally Posted by bpjadhav View Post

I think he is concerned that the speakers are rated to handle a Frequency Response of 38Hz to 35KHz while the amplifier has a frequency response from 5Hz to 150KHz, Will signals below 38Hz or above 35KHz damage the speakers.

No. I have the Broadband Frequency Response tied into video streaming. confused.gif

Price wise, that's a happening Amp.

Emotiva XPA-5

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Old 07-23-2012, 06:56 PM - Thread Starter
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Quote:
Originally Posted by bpjadhav View Post

I think he is concerned that the speakers are rated to handle a Frequency Response of 38Hz to 35KHz while the amplifier has a frequency response from 5Hz to 150KHz, Will signals below 38Hz or above 35KHz damage the speakers.

This is perzactly what I am concerned about


Quote:
Originally Posted by BeeMan458 View Post

No. I have the Broadband Frequency Response tied into video streaming. confused.gif
Price wise, that's a happening Amp.
Emotiva XPA-5
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Not 100% sure what this means (or even 50%) but I'll start googling
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Old 07-24-2012, 07:10 AM
 
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Quote:
Originally Posted by KnifeGuy View Post

This is perzactly what I am concerned about
Not 100% sure what this means (or even 50%) but I'll start googling

I'm sure it's nothing more than a number of no importance. I spent some time Googling the term before posting and with the exception of it being a video/optical transmission thingy, came up with bup-kiss. I doubt any amplifier manufacture is going do something to fry your speakers. Especially by using a Broadband Frequency Response in which to do it with. tongue.gif
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