Radial introduces Q4 class-A parametric equalizer
Vancouver BC - Radial
Engineering Ltd is pleased to announce the Q4, what could very well be
the world's first 100% discrete state-variable class-A parametric
According to Radial Senior Engineer Dan Fraser:
"Ever since George Massenburg invented and coined the term
'parametric equalizer' in 1972, audio equipment manufacturers have
followed suit by employing integrated circuit op-amps to generate the
gain in equalizer circuits. This innovation did away with
the finicky induction coils and expensive switches that were used in
the 1950s and 1960s, bringing affordable EQ circuits to the mass market.
And although this approach certainly works very well, no company has
ever gone back to the purity of 100% discrete
electronics to produce a true class-A state variable filter design. The
Q4 is exactly that. And for the more demanding golden eared engineers,
the Q4 will give them an EQ choice that has, up until now, never been
The Q4 is a line
level device designed to interface with balanced pro audio recording
systems. It features four EQ bands with fixed low and high frequency
shelving at 100Hz and 10kHz, plus two semi-parametric
mid bands that span between 300Hz ~ 2.4kHz and 1kHz ~ 12kHz
respectively. Each mid band is also equipped with choice of wide or
narrow Q to open up the sweet spot or tighten it for surgical precision.
All frequencies are set with up to 12dB of boost or cut.
The EQ may be bypassed to compare the pre and post effect.
Fraser continues: "For
years, audiophiles and engineers have been touting the sonic advantages
of full sized, discrete parts over their miniaturized integrated
circuit computer and cell phone counterparts.
The preference of using class-A circuits over class-AB or other designs
is also well documented. Couple this with the fact that 500 series
users are looking for the purity of analog and you can immediately
understand why the Q4 is so appealing. And once you
plug it in, you can immediately hear how good it sounds! There really
is nothing like it."
As with all Radial
500 series modules, the Q4 is fully encased in steel to provide
durability and screening against outside electro-magnetic fields.
Inside, the Q4 features a double sided circuit board with
100% discrete through-hole parts. These are hand inserted through-hole
wave soldered for optimal signal flow. When mounted inside a Workhorse
rack, the Omniport serves as a ¼" TRS I/O that can be interfaced with a
mixer's insert point using a simple TRS connector.
The Q4 is made in Canada and guaranteed for 3 years.
The Q4 will start shipping October 2012. Estimated retail price: $800 USD.