The G14-S is a passive stereo equalizer, equipped with two different topologies for
makeup gain and interfacing. The filter itself consist of five bands – each with 11
switchable frequencies, continuous variable “Q”
, and individual boost/bypass/cut
selection. The unit has an overall output level “TRIM”
, and a hard relay bypass serving as
reference for your work.
The stereo channels are linked – controlled with one set of knobs, so you won’t ever have
to match settings of two channels. The “Q”s, filter sharpness, are rather low when
boosting, but higher at cut – approaching notch behavior at extreme cut settings. This is
both a side-effect of the applied passive technology – as well as quite desirable in
situations where sound integrity is the paramount factor.
Frequencies for the five bands have been selected with special attention to controlability
of the midrange area, with approximately half a frequency-range overlap to the adjacent
bands.
This equalizer technology is a very extended version of the classic passive
inductor/capacitor type filter. Although the classic versions are very useful tools in many
situations, they often feel somewhat limited due to their simple construction and
coverage. Our engineers wanted – as engineers tend to do – much more of everything. So
we came up with the parallel-passive design, the G14.
G14-S is based on this truly passive design – switching a set of inductors and capacitors in
and out of circuit. This passive filter set is then matched with input/output interfacing for
trouble-free interfacing to the outer world, and a gain stage to make up for the
approximate 20dB passive loss in the filters.
For this, we give you a selection of two different technologies – at a flick of the bypass
switch: When set to “IN”
, you have the traditional and much-loved selection of tube
makeup gain based on 6H23n (E88CC/6922) tubes combined with transformer-balanced
input and output interfacing.
If this gets to be too much of a good thing, you switch the bypass to “S”
– and we replace
everything but the filter and controls with entirely different technology: The inputs are
now integrated balanced differential receivers, amplification is handled by a high-grade
opamp, and output is driven by state-of-the-art active servo balancing circuits. Two entirely
different personalities in one box.
An important feature – for us – is that the original signal path of the classic G14 is fully
preserved in the G14-S: Only parts relating to the solid-state path has been added, in “tube
mode”
, to the G14S!
Details | Technical
● transformer balanced inputs (~ 5 kΩ) or Servo/ differential receiver balanced input
(24kΩ)
● transformer balanced outputs (~ 1 kΩ) or Active servo balanced (~ 100 Ω)
● max. Boost/Cut: ~ 10 - 12 dB depending on the selected ‘Q’
● Trim: ~ +3/-5 dB
● Channel tracking: ~ 1 dB
● each band can be switched individually (hard bypass)
● 230V mains voltage (others on request)
Details | Operability
● parallel-passive architecture with tube makeup gain amplifier
● Boost/Cut/Bypass/Level/Q/Frequency on each band
● Low: 35 - 48 - 60 - 70 - 80 - 100 - 120 - 160 - 190 - 220 - 270 Hz
● Low mid: 180 - 230 - 280 - 330 - 400 - 430 - 490 - 550 - 590 - 650 - 750 Hz
● Mid: 500 - 570 - 700 - 800 - 900 - 1K - 1K1 - 1K3 - 1K5 - 1K8 - 2K1 Hz
● High mid: 950 - 1K2 - 1K4 - 1K7 - 2K - 2K5 - 3K - 3K5 - 4K2 - 5K - 6K3 Hz
● High: 4K5 - 5K6 - 6K5 - 7K8 - 9K1 - 12K - 14K - 16K - 18K - 20K - 22 KHz