BR> I have a Stereo Audio feed for 2 Watts {at} 8 Ohms (per channel) that I need t
BR> convert to "Line" level (I'm assuming this is around 1 Vac
Peak-to-Peak at
BR> much higher impedance) in order to pass the signal through an Equalizer, th
BR> back thru a secondary Amplifier (probably 5-10 Watts per channel, not built
BR> yet). Can this be done with a simple Voltage Divider like dual Pots and wou
BR> the pot(s) need to be Audio-taper?

BR> Are there any industry standard Audio Amp ICs that deliver approx. 10W/RMS
BR> channel I should use for the last stage? I have a couple of National Stereo
BR> Amps (Lm4755) rated at 11W/channel with low noise/distortion specs, I think

BR> I dismantled a very expensive TV to develop the Line-level outputs but coul
BR> only work out speaker taps (no schematic :( they go for over $50) and canno
BR> risk/afford to cause any damage by playing around . My old TV had
BR> Audio/Line-out taps that sounded incredible through the Equalizer. :)

 First, be sure you have isolation between the
audio outputs that you plan to use and the AC
mains!! An isolation transformer or an audio
transformer could be used if needed.

 The conventional way to change the level is to
use a "higher than normal impedance" load and a
coupling capacitor.

 100 ê is a common load and 220 ufd is a common
capacitor value. The positive of the capacitor
is connected to the load side (or, better yet,
use a non-polar capacitor).

 I don't recommend keeping the speakers
connected at the same time. A switch could be
used to select internal speakers or an external
amplifier.

 You could add a potentiometer after the
capacitor to vary level. I wouldn't worry about
the taper unless you plan to use it as a volume
control, rather than a set and forget matching
device.

 I don't have a recommendation on which IC to
use.

 TTYL.

 Robert

 * SLMR 2.1a * Two guys walk into a bar. Why didn't the second one duck?
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