The Q150A Transistor Ladder Filter is a single-wide version of our popular Q150 Filter. Both filters use the same circuitry, and they sound and operate identically. See Q150 page for details about this filter.
Convert an existing Q150 double-wide filter to a Q150A single-wide filter with our conversion kit.
The Q150A has only one attenuated input and ships with reversible frequency control. The frequency control can be changed to an attenuated control by moving the connectors on the pcb. See the datasheet for more details.