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FAQ

What is a Parametric EQ?

A parametric EQ permits the operator to not only set the cut/boost of a given band, but also the center frequency and the BANDWIDTH of that band. Typically, a band may be as narrow as, say, 1/6-octave, to as wide as 3.0-octave. The center frequency of the band is tuneable over a wide range, as well. So, instead of a single control per band, there are 3. A "semi-parametric" EQ has cut/boost, a frequency "sweep" control, but no bandwidth control.

Parametric EQ's excel at "honing in" on a problem frequency band and minimizing it. This can be a loud "hot spot" on a bass guitar, or a resonant node prone to feedback in a live situation. You can also set up a much wider band than the typical graphic EQ can do, allowing you to use it as a gentle "tone control".

Ashly PQ66 Parametric EQ

anonymous 13 June 2003

Forums

Anyone familiar w/ this goliath? Made in late-80s/early-90s. It's a 3U space 4-band stereo (dual mono or link-able stereo) parametric, but I can't find any specs about it on the web. I know Ashly was an early pioneer of parametric EQ. Is this sucker tube? Transformer? Gerbil on a wheel (it's big enough to house a whole family of wheel-running rodents)?

Sweeping Frequencies? Parametric EQ's

anonymous 7 March 2003

Forums

Hi, I keep reading articles about narrowing the Q and sweeping the frequencies to find the problem frequency.

Can anyone please tell me what the physical act of sweeping the frequencies is please, is it actually tweaking the Frequency knob up and down and if it is, what exactly should I be listening for?

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