Thread: rec.audio.dbt
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All Ears
 
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Default rec.audio.dbt

"Stewart Pinkerton" wrote in message
...
On 21 Aug 2003 00:02:47 GMT, "All Ears" wrote:

snip

People post nonsense about
"current amplifiers" and assume since THEY believe it works the
way they think with all their hearts, it doesn't make ANY
difference if the physical reality is something quite different.


Mr. Pierce,

Then please explain what an amplifier with these specifications does?

Output power 150 W rms
Input sensitivity 1.0 V rms for 150 W into 8 Ohms
0.9 V rms for 150 W into 4 Ohms
Voltage gain 39.7 V (32.0 dB) into 16 Ohms
34.4 V (30.7 dB) into 8 Ohms
27.1 V (28.7 dB) into 4 Ohms
17.2 V (24.7 dB) into 2 Ohms


It is a voltage source with a poor power supply and/or excessive
output impedance of a couple of ohms. Could well be a tube amp. BTW,
you don't mean voltage gain, you mean voltage output.

If it were a good current source, it would put out 6dB less for each
halving of load impedance, i.e.

37dB into 16 ohms
31 dB into 8 ohms
25dB into 4 ohms
19dB into 2 ohms


I think that they might have discovered that a "pure current source" did not
work too well with dynamic speakers?

--

Stewart Pinkerton | Music is Art - Audio is Engineering