The crossovers used on many of Altec's later VOTT home and commercial speakers, such as the Model 19 home speaker or the 1234 commercial speaker, have a HF level control that not only reduces the overall level of the HF driver, but unfortunely also progressively rolls off the upper treble.

This treble roll-off can be easily eliminated by by-passing the small (.3mh or .5mh inductor in the beginning of the HF section of the crossover. This can be easily done.

In the N1201-8A crossover used in the Model 19, just move a wire from one side of this .3mh inductor to the other side (see the schematic that has been previously posted on this Forum).

In the N1209-8A crossover that is used in many later VOTT speakers, just cut one lead to the .5mh inductor to take it out of the circuit.

In both crossovers there is an 8 ohm variable resistor that is wired in parallel with the subject inductor. It is really just one leg of a standard 8 ohm L pad. I converted this to a true L pad by adding a small jumper wire from the unused lug on the L pad to ground. This greatly expanded the amount of attenuation possible.

Ron Kramer