Amp/Preamp Asylum: Re: Input sensitivity is indeed the key, but not the way most manufacturers state it. by neolith

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Re: Input sensitivity is indeed the key, but not the way most manufacturers state it.

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neolith

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In Reply to: Re: Input sensitivity is indeed the key, but not the way most manufacturers state it. posted by kgturner on March 9, 2006 at 13:40:04:

You want the gains of the two amps to be the same into the same load.
To convert sensitivity to gain, you have to calculate the output voltage into the load at the rated power of the amp. P=I*E and I=E/R so P=E^2/R.
Solving for E gives you E=Sqrt(P*R). Gain equals 20*log(Eout/Ein).
For the Carissa rated at 16 watts (I assume into 8 ohms) with a sensitivity of 0.6 the gain can be calculated as follows.
E= sqrt(16*8)=11.3v and the gain is 20*log(11.3/0.6)=25.5.
Similarly for the Cary rated a 130 watts into 8 ohms
V=sqrt(130*8)=32.2 so the gain is 20*log(32.2/0.7)=33.2.
Thus your amps have a 8db difference in gain which is not so good.

I may be an egoist but at least I don't talk about other people.

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Topic - Bi-Amping w/ 2 Different Amps - What Specs Do I Match??? - kgturner 11:55:10 03/9/06 ( 11)

Re: Bi-Amping w/ 2 Different Amps - What Specs Do I Match??? - Awe-d-o-file 17:28:34 03/9/06 ( 0)
Gain of each amp should be the same (nt) - welly 14:31:49 03/9/06 ( 0)
Kevin, what I didn't write below is that I think biamping your system passively is a fine idea. - jeffreybehr 13:03:11 03/9/06 ( 0)
Re: Bi-Amping w/ 2 Different Amps - What Specs Do I Match??? - porziob@aol.com 11:59:51 03/9/06 ( 7)
- Not sensitivity... gain. Even more exactly - gain into particular load. - Victor Khomenko 17:03:23 03/9/06 ( 0)
- Input sensitivity is indeed the key, but not the way most manufacturers state it. - jeffreybehr 12:55:09 03/9/06 ( 5)
  - Re: Input sensitivity is indeed the key, but not the way most manufacturers state it. - kgturner 13:40:04 03/9/06 ( 4)
    - Re: Input sensitivity is indeed the key, but not the way most manufacturers state it. - neolith 03/9/06 19:07:38 03/9/06 ( 1)
      - Re: Input sensitivity is indeed the key, but not the way most manufacturers state it. - kgturner 09:50:24 03/10/06 ( 0)
    - "both input sensitivities are rated at full output." And just WHAT ARE those sensitivities????????????? (NT) - jeffreybehr 16:07:36 03/9/06 ( 1)
      - Re: "both input sensitivities are rated at full output." And just WHAT ARE those sensitivities????????????? (NT) - kgturner 17:37:59 03/9/06 ( 0)