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Re: Audiobytes are here (litterally!)
jakeman #188468 12/16/07 05:09 PM
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That's a good analysis, John. I found out from Tom that this amp will provide 60W clean into 4 Ohms from 20Hz up (it's 3dB point is at 10Hz). We may therefore be able to play up to 107dB peaks for a total headroom of 20dB.


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Re: Audiobytes are here (litterally!)
Mojo #188469 12/16/07 05:15 PM
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Friday I measured 109.8db (from 1.5 feet) with a piece that I know (because it shows up on a curve) that has fairly long sequences at or near 100% (0db). The dynamic was amazing! So with a test singal at standard 3 feet, I have no problems believing it can reach 107db.


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Re: Audiobytes are here (litterally!)
Mojo #188470 12/16/07 05:16 PM
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 Originally Posted By: Mojo
BTW, the link I sent you is probably best for your main system.

Yes, I have it marked for later download.


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Re: Audiobytes are here (litterally!)
EFalardeau #188471 12/16/07 05:33 PM
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The in-room sensitivity of these is rated as 87dB. So two of them should produce 93dB theoretically. So the best SPL we could hope for is 93+10log(60/1) = 111dB at 3 feet. I doubt they'd be able to maintain this SPL for long though. The voice coils would most likely heat up and start compressing.

Re: Audiobytes are here (litterally!)
Mojo #188472 12/16/07 05:37 PM
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That's still pretty amazing for desk speakers! Maybe you should order some so you could **censored** your music collection! \:\) Oh! That's right! You DID order them. They're just not in yet! ;\)


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Re: Audiobytes are here (litterally!)
Mojo #188501 12/16/07 07:07 PM
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Eric if that is what Uncle Tom says we can take it to the bank. The Axiom amp stats are quite conservative. He mentioned to me that the A1400-8 can exceed what is published.

The Audiobytes would put most small stereo systems to shame so its really funny to call it a computer speaker system.


John
Re: Audiobytes are here (litterally!)
jakeman #188503 12/16/07 07:21 PM
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Tom is your uncle too? I guess we are all related, huh \:\) ?


House of the Rising Sone
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Re: Audiobytes are here (litterally!)
Mojo #188507 12/16/07 07:51 PM
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Yup. He signs his emails to me as Uncle but in person I get to call him Tom because he is only five years older than me. I guess its better than calling him Aunt Tom.


John
Re: Audiobytes are here (litterally!)
Mojo #188509 12/16/07 08:00 PM
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 Originally Posted By: Mojo
The in-room sensitivity of these is rated as 87dB. So two of them should produce 93dB theoretically. So the best SPL we could hope for is 93+10log(60/1) = 111dB at 3 feet. I doubt they'd be able to maintain this SPL for long though. The voice coils would most likely heat up and start compressing.
You planning to run yours in mono? Instantaneous peaks can go much louder which is why they have given us all that amp headroom which you seem to not think is relevant judging by your comments in the A1400-8 thread. That is key to good fidelity, which much to my amusement a lot of folks still refuse to acknowledge.


John
Re: Audiobytes are here (litterally!)
jakeman #188510 12/16/07 08:07 PM
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I'm all for amp headroom. I just disagree at this point with the magnitude that some feel is required. But, as you know from the PM I sent you a half hour ago, I am trying to quantify this better for myself.

Sorry, I don't understand your point about mono. The SPL I calculated above is the theoretical best we can hope for.


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