Ted Olausson wrote on Mon, 18 February 2008 18:37 |
No, typo, 80 KILO hertz is it bandlimited to. It can only handle 300KHz at full power, but the risetime is 0,5uS and slewrate is 180v/uS.
Should i mention the brand!? Naah
|
Well that doesn't exactly clear it up for me... Band limited to 80 kHz but only handles 300 kHz at full power. Is that another typo?
I am an advocate of rise time instead of slew rate specifications. For the record the rise time spec implies a low pass filter either before or incorporated into the input gain stage. The few times I've seen rise specs for power amps there is often a foot note that the rise time filter is disabled during the slew rate measurement. Because customers insist on hearing high slew rate numbers in a "more is better" contest despite having little clue about what they actually mean. Another archaic specification that used to mean something when amps were slow.
Since slew limiting is like clipping in the time domain, a properly low passed amp can't be slew limited with a valid input signal, making such measurements a little difficult. A max slew rate could be imputed from the power bandwidth frequency and voltage, but a well designed circuit is typically faster than that.
If the power bandwidth really is 300 kHz that is excessive for audio reproduction.
My only possible interest in the brand name is to look up a data sheet and see what the specs really are, but nah..
JR