I had been having trouble getting the proper sw output -volume- from my Vandersteen 2w sw in conjunction with my Reference 3a deCapo's. The sw output was not sufficient and I gather for these reasons: 1 The 2w is old from circa 1992 although it sems to work well, and 2, the efficiency of the deCapo's is 92 db, almost the limit of the sw attenuation -which is 94db- dial so there is not much volume control leeway.
The 2w xover is a line level passive 6db per octave for high pass at 80 hz in the preamp and the sw is connected to the power amp outputs and then the sw amp xover equalizes the low frequency respose from there. So how could I increase the sw output? In came the Tx 102 volume control with the 6db gain set in. Voila! It did it. I connected the amp outputs to the tx inputs and from there on to the sw. Instant audditional sw output! I can dial any output i want. But the curious thing is the the output is increased by dialing the voume dial counterclock wise, so I gather that it has to do with the impedance the amplifier output is increasing as one dials the control counterclockwise. If Mr. Chapman could comment on this I would appreciate it. Thanks. MV