6
Stepped potentiometers for
easy recall;individual bypass
for each filter band
Central grounded shield
layout,single op-amps,
Sovtek tubes,custom
made condensers
and potentiometers
General Features
To allow easy recall of all control settings the QURE is equipped
with stepped potentiometers throughout. The number of steps is
optimized to the control function: 11 steps for bandwidth, 31
steps for frequency and boost/cut, and 41 steps for input gain,
HF/LF Cut filters, and QURE control.Each band can individually be
switched in and out of the signal path making comparison easy
and avoiding the need to nullify the boost/cut control.
Each filter is mounted on a separate printboard featuring a
‘central grounded shield layout’ (CGSL) for maximum rejection of
interfering frequencies. Single op-amps are used throughout to
minimize noise and THD.The tubes in use are the well-acclaimed
Sovtek 12 AX 7. Furthermore selected custom made condensers
are used to produce harmonical and pleasant sounding THD
spectra.The frequency controls are also custom made featuring a
control characteristic that is designed to realize a gentle
frequency sweep with a musically optimized control range.
Overview
• 2x 3-band EQ with variable HF and LF cut filters
• QURE circuitry (Tube + LCR)
• Variable input gain (-12 dB to + 18dB)
• Variable output gain (-7dB to + 4 dB)
• Hard-bypass for each filter band and both cut filters
• Master relay hard-bypass for entire unit
• Central Grounded Shield Layout
• SPL super-balancing hybrids (CCMR -90 dB)
• Tube warm up circuitry for prolonged tube-life
• Overrated internal toroidal power supply
• PREMIUM-Version (recommended):
LUNDAHL in- & output transformers (LL1539 & LL1540)
