My answer is to use the Radio Shack Optimus SA-155 Integrated Stereo Amplifier. It was also produced as the RCA SA-155. Specs are 1.8W per channel, 25-25,000 Hz. Has tone and balance controls, an 1/8" stereo phone jack and a tuner, CD/tape and phono switch. Works fine with phone or the beefy speakers I use (about three times the size of typical computer speakers). Mine sits atop the K3 with 3/4" to spare on either side of the K3.

Dave Heil K8MN

On 31-Dec-16 22:46, Harry Yingst via Elecraft wrote:

I have the K3 and a pair of SP3 speakers

When I turn down the RF gain and turn on the NR (to clean up the band noise)  I 
run out of Audio (too quiet) to hear the weaker signals.

I was curious if anyone is running a small external amp between the K3 and the 
speakers to help bring up the volume?

Thank you
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