equalizer?

[Rob 515]

Graphic equalizers come in two distinct flavors; variable-Q and constant-Q.

Constant-Q
Years ago (before modern audio analyzers) an audio manufacturer made a name for themselves and convinced many that the constant-Q was the way to go. This type of eq paints a very pretty picture on a 1/3rd octave audio analyzer. The filters are very steep and choppy at boost/cuts less that 6 - 8 dB. More boost/cut and the filter looks like . . .

Variable-Q
All of Altec Lansing equalizers (up to and including the "programmable" 8000 series) are variable-Q. Each filter overlaps the adjacent filters. The more you boost/cut, the more frequencies are affected. Gentle boost/cuts are suggested. In fact, most recommend cut only for a playback system.

The 1753A was the last 1/3rd octave eq offered by Altec and it is nice piece. A pair of Altec 1653 equalizers would be worth big-time bragging (1/3rd octave, cut-only).

Please keep in mind that most Altec electronics were sold and used for professional/commercial applications. Most used units have likely been running since they were new and they typically start having contact/component issues after ten years of steady use.

Hi, I bought a pair of Altec 1653A equalizers and are these variable Q ? cut only or boost and cut?
I see above says variable Q and cut only, but seller says boost and cut. I'm hoping cut only.

thanks
rob