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