|Frequency response:||<10 Hz - 400 kHz (-3.0 dB)|
@ 0 dBu, 20 Hz - 22 kHz
@ +10 dBu, 20 Hz - 22 kHz
20 Hz - 20 kHz (A-weighted)
20 Hz - 22 kHz
The xfilter is a true linked stereo equalizer with the heart and soul of our flagship EQ, the museq. It gives you the expensive sound of an all class-A equalizer in a surprisingly affordable package, with a precise stereo image based on computer-selected, stepped pots and low tolerance film caps.
This EQ is serious about flexibility. It offers high and low shelf bands which can be switched into high and low cut filters with resonance, two mid peak filters with wide and narrow Q, plus additional passive LC stages with shielded coils for a glorious top end.
With its exceptionally open sound, straight transient projection and solid punch, the xfilter is the perfect match for your xpressor – or any other piece of delicious outboard gear!
Review in Recording Magazine:
"The complete picture shows an EQ that does a very good job. In a market dominated by a few high end passive EQs by Manley and Pultec there are only very few good EQs with a reasonable price tag, and this is exactly what the xfilter stands for. Especially in combination with the other elysia processors, the xfilter is a truly reasonable acquisition for any professional studio."
100% Class-A Topology
Discrete input, output and mix stages plus the complete audio path running in constant class-A mode are the basis for an exceptionally transparent, wide and open sounding EQ. We love the sound of class-A circuitry! And here is why: In a class-A amplifier, the transistors are conductive all of the time, so there is no crossover distortion at all. This is the perfect technological basis for an open sound with massive punch and no degradation of your original source.
The discrete approach makes it possible to design every single stage in signal processing exactly to what you want it to do - physics becomes the only limit. The xfilter uses our custom discrete input and output stages derived from the alpha compressor. The mixing stages are also discrete designs running in class-A mode. The actual filter stages (band pass etc.) use integrated op-amps instead, and also in this regard we did not go for an off-the-shelf solution. Instead of cheap industrial standard op-amps, the xfilter uses high grade Burr-Brown OPA series amps which have been designed especially for the critical discerns of pristine audio circuitry. And there it is – the expensive sound of boutique high end EQs in an affordable package.
True Stereo Operation
As one of the few exceptions in the market, the xfilter processes both of its channels with just one set of controllers – a true stereo linked EQ.
Resonance High & Low Cut Filters
The shelving filters can be switched into high and low cut filters with an additional resonance peak. Not ordinary, but extremely useful.
Switchable Filter Quality
The quality of the peak filters can be switched from a wide to a narrow Q factor which remains independent from the setting of the gain controller. The filter quality of the two parametric mid bands can be switched between two characteristics: Wide (Q 0.5) and narrow (Q 1.0), based on the proportional Q principle. When designing a parametric filter, you have quite a range to choose from when it comes to the Q factor. After extensive listening, we decided to implement a choice of 0.5 or 1.0 in the xfilter, as these parameters always result in what this machine is focused on: Very musical processing.
You will notice that very narrow Q factors are not offered here. These days, most engineers we know of use digital filters for notching narrow ranges to get rid of problematic frequencies anyway. And this is for a good reason, as it works extremely well.
Additional Passive High-Band
The beautiful sheen only passive filters can deliver... the xfilter has it all. An additional LC filter with shielded coils gives you the 'Passive Massage'.
All potentiometers on the xfilter have 41 steps, which is a great help for recalling your previous sessions fast and precisely.
Every single dual and quad layer pot we buy is measured with custom computer routines, and only the good ones go into production.
Special Low Tolerance Capacitors
The special series of film caps used for the xfilter performs twice as good as the industry standard in terms of component tolerance.
Ground Layer Shield
One of the four layers of both PCBs is a full copper plane which helps to reduce interferences caused by electric fields.