SPL Qure EQ (Used)

Input & Output
Instrumentation amplifier, electronically balanced (differential), transformerless Nominal input level +6dB
Input impedance = 22 kOhms
Output impedance < 600 Ohms
Max. input level +14dBu
Max. output level +20dBu
Minimum load ohms 600 Ohms
Relay Hard Bypass
Power Fail Safety

Frequency response:10Hz 100kHz(100kHz = -3dB)
EQ frequency range: 15Hz 21kHz
CCMR: > -80 dB @ 1 kHz
THD & N: 0,01855% @ 1kHz
S/N CCIR 468-3: -85dBu
S/N A-weighted: -99dBu


Power Supply
Toroidal transformer 35 VA
Fuse (primary) 500 mA (230V/50Hz), 1000 mA (115V/60Hz)
Ground-Lift switch, Voltage selector 115V/230V

The Qure is a fully parametric equaliser, specially designed to meet the most demanding studio applications. It is a 3-band, two-channel system with input and output gain controls, high-cut and low-cut filters as well as the new QURE control for enhancing the presence and room imaging of vocals, instruments and complex stereo material.

Both balanced XLR and balanced stereo jacks are provided for signal connections to and from the Qure. The proportional-Q principle provides precise control over a frequency range, from 15Hz to 21kHz, while the low noise level of -99dB (A-weighted), and the enormous dynamic range of 113dB make the Qure ideally suited for mastering and cutting. By employing circuitry designed around the principles of perceived sound, rather than simply designing by numbers, the Qure overcomes the limitations of conventional parametric equalisers.

The Qure circuitry is a new SPL development which gives the name for the unit and also represents a new technology, which uses coils to influence the presence and the spatial imaging. At the same time it is ideally suited to "cure" recordings from digital harshness.

The signal runs through a tube circuitry featuring an 12AX7-LPS double triode tube in a mixed current/voltage coupling mode. This stage is extremely clip-resistant and produces a pleasant and musical sounding tube-THD spectrum. The Qure On switch puts a coil/condenser/resistor filter network (LCR) into the tube output stage. This network is integrated into the coupling path of the tube and reacts on the dynamic response of the input signal by influencing THD spectra and phase response. The Qure potentiometer changes the frequency response and produces a fresh and silky top-end and a mid-range free of sharpness and harshness. For example, vocals can be "placed" in the front of a mix without having to provide more "space", also background or layer sounds can gain improved spatial depth.