Klark Teknik EQP-KT Classic Tube Equalizer with Switchable Frequency Selection

The EQP-KT draws inspiration from the legendary Pultec EQP-1A equaliser, which was first produced in the early 1950s. Since then, Pultec equalisers have been prized for their smooth musical sound, and audio engineers have utilised them at all stages of the recording process from tracking to mastering. At the heart of the EQP-KT is a vintage Class-A circuit design constructed from the highest-quality discrete components all of which meet or exceed the Pultec EQP-1A's original specifications. This is just one of the many ways the EQP-KT brings unparalleled precision and superb signal integrity into the new audio age.

EQP-KT owes its characteristic warmth to a set of premium, hand-selected 12AX7 and 12AU7 tubes. This time-tested combination provides ultra low-noise analog output with the ideal balance of tight, warm bass, silky-smooth midrange and brilliant, airy treble.

KLARK TEKNIK is proud to incorporate custom-designed MIDAS Input and Output transformers in the EQP-KT for the ultimate in high-quality audio reproduction in both live and studio environments.

Incredible Flexibility
EQP-KT provides the kind of tone-sculpting flexibility that you simply won't find on the average equaliser, such as the ability to boost and cut specific frequency content simultaneously. This functionality is a product of EQP-KT's two-band design, which allows the boost and cut controls to work independently of one another for incredibly flexible shelving. Both the LF Boost/Cut and HF Boost controls provide 7 frequency selections, along with a variable broad-bandwidth midrange control. Finally, EQP-KT's HF Cut control lets you dial in the perfect amount of "air" to add a touch of finesse to your top-end content.

Bypass Mode
The EQP-KT is anything but typical, and that includes the operation of its Bypass/EQ On switch. If you could see EQP-KT's signal path, you'f find a MIDAS Input transformer, two-band equaliser, a makeup gain amplifier, and a MIDAS Output transformer. When the switch is in the Bypass position, the only section that is no longer part of the signal path is the equaliser.

Balanced Connections
The EQPKT has both XLR and 1/4" TRS balanced Inputs and Outputs, both of which operate at line level. Unbalanced connections are also available via 1/4" TS cables.

Features:

• Single-channel, two-band equaliser based on the classic Pultec• EQP-1A


• Class A, all discrete circuitry for highest signal integrity


• Premium selection 12AX7 and 12AU7 tubes


• Custom-built MIDAS input and output transformers


• Switchable frequency selectors with up to 7 frequency points


• Independent boost and cut controls provide immense creative potential


• Variable bandwidth control for wide sound sculpting


• Inductor based equaliser section


• Bypass feature allows for A/B comparison


• Transformer balanced inputs and outputs on Neutrik• XLR connectors


• Rugged 2U rackmount chassis for durability in portable applications


• Auto-ranging universal switch-mode power supply

Technical Specifications:

Audio Input
Type: XLR, 1/4" TRS, transformer balanced
Impedance: > 600 Ω, balanced and unbalanced
Max. input level: +21 dBu
Optimum input level: +4 dBu

Audio Output
Type: XLR, 1/4" TRS, transformer balanced
Min. output load impedance: 600 Ω
Impedance: < 300 Ω, balanced and unbalanced
Max. output level: +21 dBu

System Specifications
Frequency response: 20 Hz to 20 kHz, +/-1 dB
Distortion (THD+N): < 0.1% @ 1 kHz, +4 dBu
Dynamic range: > 101 dB, typical
(20 Hz to 20 kHz unweighted)
S/N ratio: 80 dB @ +4 dBu In
Circuit: Class-A
Vacuum tubes: 12AX7, 12AU7

Filters
Low Frequency Cut / Boost Section
Boost: 0 to 12 dB, shelving
Cut: 0 to -24 dB, shelving
LF boost / cut: 20, 30, 60, 100, 200 ,400, 800 Hz, selectable

High Frequency Boost Section
Boost: 0 to 12 dB, shelving
0 to +10 dB (Broad)
HF boost: 3, 4, 5, 8, 10, 12, 16 kHz, selectable
BandwidthvQ = 1 to 10 (sharp to broad), selectable

High Frequency Cut Section
Cut: 0 to -20 dB, shelving
HF cut: 3, 4, 5, 10, 20 kHz, selectable

Power Supply
Mains voltage: 100 240 V~, 50/60 Hz
Power consumption: 15 W
Fuse: T1AH 250V
Mains connection: Standard IEC receptacle

Physical
Dimensions (H x W x D): 88 x 483 x 167 mm (3.5 x 19 x 6.6")
Weight: 3.0 kg (6.6 lbs)