Peak power rating for BasX-A5??

[gorhas]

Hello. i'm considering the BasX-A5 amp as an upgrade to the amp in my Denon AVR X3700H. This AVR as you my know as has a pre-amp mode which essentially turns off the amp resulting in a very good pre-processor. 

I have a small listening area with my seating only 10' away from my front 3 speakers which are a pair of Axiom M22's and a VP100. Since these speakers are quite old (circa 2003), i'm having a hard time determining their sensitivity. I believe their sensitivity is either 92, 93, or 95 based on some research i've done ... still waiting to hear from Axiom. Assuming their sensitivity is 93 dB, if i want to my amp to deliver to my seating area 85 dBs with 20 dBs headroom, I need RMS 75 watts with Peak 150 watts. I know this amp is 95 RMS watts but can't see how much headroom they have. Can anyone help?

Thanks,
Steve

[AudioHTIT]

Nov 3, 2021 18:27:01 GMT -5 gorhas said:

Hello. i'm considering the BasX-A5 amp as an upgrade to the amp in my Denon AVR X3700H. This AVR as you my know as has a pre-amp mode which essentially turns off the amp resulting in a very good pre-processor. 

I have a small listening area with my seating only 10' away from my front 3 speakers which are a pair of Axiom M22's and a VP100. Since these speakers are quite old (circa 2003), i'm having a hard time determining their sensitivity. I believe their sensitivity is either 92, 93, or 95 based on some research i've done ... still waiting to hear from Axiom. Assuming their sensitivity is 93 dB, if i want to my amp to deliver to my seating area 85 dBs with 20 dBs headroom, I need RMS 75 watts with Peak 150 watts. I know this amp is 95 RMS watts but can't see how much headroom they have. Can anyone help?

Thanks,
Steve

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So at 95WPC ACD that’s close enough to 100 to use that and make the math easier. Essentially at 100W, any amp has 20dB of headroom over its 1W output, so if (let's be conservative), your speakers produce 92 dB SPL @ 1W / 1M then they should do 112 dB @ 100W / 1M. Normally we’d drop 6 dB @ 2M and another 6 at 4M, now we’re down to 100 dB @ about 13’. But in a ‘normal’ room we wouldn’t drop of at a straight inverse square. Then you add in at least 3dB for a second speaker (and maybe a touch more for surround). I’d say without knowing too much detail or using a calculator your close to your 105 dB SPL at the seating area (unless your room is huge).

Edit: Peak power will give you a bit more, but too many variables to calculate.

[gorhas]

Thank you AudioHTIT. This is helpful. i know i'm close to my goal, i'm just trying to confirm. I'd feel better know how much headroom these amps have to deal with dynamics before clipping. Problem solved it Axiom comes back and says the sensitivity in my LFRs is 95 dBs.