Yamaha PKBX2 Double X Portable Keyboard Stand Recording Remotes A crossover is essential for

A crossover is essential for efficient PA operation because it filters the full band input signal into specific frequencies that match a speaker's optimum frequency-reproduction range

is now enabled by front panel access to the trim controls

and for tenor horn and very small bore trombones

Don't want filter frequency control on a knob

Peter Erskine (SPE)

Yamaha PKBX2 Double X Portable Keyboard Stand Recording Remotes A crossover is essential forThe quintessential Double braced "X style stand is designed for both beginners and the seasoned veterans. With a slim folding position, it will provide traveling and storage convenience for any musician. The Yamaha PKBX2 comes complete with a circular locking mechanism and quick change knob that adjusts to six different playing heights. Priced affordably, this stand provides fundamental stability and portability.