Elysia Xfilter

True stereo EQ featuring all Class-A topology, and a passive high frequency LC filter. Provides the expensive and open sound of high quality boutique EQ.


The elysia xfilter is a true stereo equalizer with at its core the same Class A circuitry and EQ curves of their highly regarded Museq, all in a 1U, 19” rack.
The xfilter by elysia is extremely flexible and features both high and low shelf bands with switchable high and low cut filters with resonance control, two mid peak filters with selectable wide or narrow Q, and passive LC stages for beautiful high frequencies. As a result the xfilter delivers a beautifully open sound with superior transient detail and solid low-mid punch.
Using a 100% class A topology, with discrete input, output and mix stages, ensure a truly transparent and open sound with no degradation of the original source. In addition the xfilter uses the same custom discrete input and output stages as on their Alpha mastering compressor. The filter stages use Burr-Brown OPA op-amps which have been designed especially to work in pristine audio circuitry.
Being a true-stereo EQ, each control will affect both channels automatically. To achieve this, the xfilter uses computer-selected dual and quad layer pots and special low tolerance caps. In addition, stepped controllers have been installed throughout offering 41 steps for a truly precise settings and easy recall. As a result the Xfilter ideal on the stereo buss channel or in mastering applications.
Although the xfilter offers two Q modes, it doesn’t allow for extremely narrow Q, leaving digital EQs to do all the notching. Instead the xfilter focuses on the musicality and only offers Q values of 0.5 in wide mode and 1.0 in narrow mode, using proportional Q principles. The addition of a ‘Passive Massage’ band at the top end delivers the beautiful and magic top end only passive EQ designs can provide. The Xfilter uses a fixed LC filter with a peak at 12kHz before decreasing at 17kHz.

 elysia xfilter Features:

100% Class-A Topology
Boutique sound
True Stereo Operation
Resonance High & Low Pass Filters
Additional Passive Massage High-Band
Switchable Filter Quality
 with wide and narrow Q for the parametric mids
Computer-selected Special Low Tolerance Pots and Caps for better stereo accuracy.
Stepped Controllers
Made in Germany

elysia xfilter Specifications:

 Frequency response:  <10 Hz - 400 kHz (-3.0 dB) THD+N: @ 0 dBu, 20 Hz - 22 kHz 0.0018 % @ +10 dBu, 20 Hz - 22 kHz    0.005 %   Noise floor: 20 Hz - 20 kHz (A-weighted) -98 dBu Dynamic range: 120 dB (20Hz - 20 kHz) Maximum level:  Input +21 dBu Output +21 dBu Impedance: Input 10 kOhm Output 68 Ohm



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