Knif EKSA F Mastering-Grade Class A Equalizer

The Knif EKSA F is a versatile audio equalizer intended for audio mastering and mixing applications. Being an active equalizer, EKSA within the Knif product range, is the quintessential counterpart to Soma. While inspired by legendary Sontec designs, EKSA is actually substantially more sophisticated and complex. EKSA, unlike the classic designs of the past, allows noise and wideband gain to be virtually independent of Q setting. The Eksa F version comes with added gain adjustment and low-pass and high-pass filters and elliptic filtering capability.

FULLY DISCRETE CLASS A SIGNAL ARCHITECTURE

EKSA is equipped with MS encoding and decoding and the circuit consists of no less than 28 Class A discrete operational amplifiers crafted in-house. The circuit employs DC servos for MS, each core amplifier is meticulously calibrated to minimize their impact on the audio range. The servos boast time constants of well over one minute for absolute absence of any sonic impact.

PRECISION GAIN CONTROL AND RELAY-BASED SWITCHING

The band gain range is adjusted in 23 steps and the range can be extended from the default ±4.5 dB to ±9 dB using the x2-mode. All signal switching on the PCB is executed hermetically by subminiature relays with gold plated contacts (100 pieces per channel) and all capacitors in the filter circuits are polypropylene.

KNIF EKSA F FEATURES:

• Five band parametric equalizer with interleaved frequency bands
• Gain adjustment and low-pass and high-pass filters and elliptic filtering capability
• MS matrix with discrete Class A operational amplifiers
• Fully equipped with in-house Class A discrete op amps
• Stepped Elma switches for all rotary controls:
• 8-position Shelf/Q adjustment
• 24-position Frequency adjustment
• 23-position Boost/Cut with selectable range (4.5/9.0 dB)
• Polypropylene capacitors in all filters
• Subminiature relay switching
• External power supply