Topband: My experience using CW speakers

[n4is at comcast.net]

Yes, you can copy fast cw. In few words, the CW speaker is not a filter with group delay that causes the ring sound. The column of air oscillates on the tube resonance, like when you listen to a flute, the sound is from the tube not from the mouse of the musician. The audio from the speaker disturbance makes the air column of air to resonate. Adriam project does a better job than my killing any sound from the speaker. The best way to listen the cw speakers is from the side of the tube, not like a gun pointing to your ears. The CW speaker works like a practice osclillator.
I can copy 40 wpm at 6 Hz BW without ringing sound.

73's
JC