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Peak Listening Levels - Some analysis and some thoughts...

Posted by DevillEars (A) on February 28, 2007 at 09:22:27

First, the analysis bit...

a) Speakers : Tannoy D700

- Nominal Impedance : 6 ohms
- Quoted Sensitivity: 93dB at 1m
- Listening Distance: ~3 metres

b) Amplifier: Jeff Rowland Model 201 monoblocks (x2)

- Output into 8ohms : 250 watts per channel
- Output into 4ohms : 500 watts per channel
- Output into 6ohms : 375 watts per channel (interpolated)
- Amp Damping Factor: >1,000

c) Calculation as per formula:

- From Amp Power Table: 25dB
- Speaker Sensitivity : 93dB
- Maximum SPL (1metre): 118dB
- Distance Attenuation: ((3-1) x -5) = (2 x -5) = -10 dB
- Peak Listening Level: 108dB

Next, some thoughts on "The Meaning of Wife"...

a) All of the above is totally academic:

- SWMBO will gripe at levels that depend on her mood
- If SWMBO is out, the kids will gripe at various levels
- If all humans are out, the pets will gripe
- If you're alone, the neighbours will gripe

b) Sound and levels mean nothing if the gear is "ugly":

- SWMBO (aka BWFH) will focus on visual aesthetics
- Sonic performance comes a definite last

c) Definition/meaning of the term "Watt":

- Electrical definition is totally irrelevant
- Correct spelling is actually "WHAT?"
- Context for use: After being told price of component

So, there you have it - the DE view...

"Don't roll those blood-shot eyes at me!"

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