Originally, painstakingly auditioned over 4 months, against the likes of Transparent Audio, Synergistic Research, Signal Cable, Nordost and Tellurium Q.
Unbelievable sound quality - and not just 'for the price'! IMO - and check out the white paper by Q Acoustics - they are virtually seamless across the entire frequency range. Their development and manufacture is based upon QED's vast experience of cable science, not 'personal preferences'. Their specs (Loop Resistance, Capacitance, and Inductance values are state-of-the-art) tell the story - see below.
Awarded 'Audio Excellence' class from Martin Colloms in HiFi Critic* (which is a pretty damn rare event!). * The only truly independent-of-suppliers/advertising world-class audio magazine
These cables are genuinely 'as new' - they have been installed in my system for less than 15 months.
A change of amplification (to a stereo amp, from 2 monoblocs) means I need longer lengths. I am replacing them with same, but longer Supremus cables - because for less than $12k per pair, I don't think there is anything to touch them.
PLEASE NOTE: European Shipping is far less than this ($55 to the USA) example. Carton weight (3.5kgs) means this is variable, so please ask before payment!
QED Aircore™ Technology:
Unique geometry and construction for unrivalled high frequency details and cable timing
QED's largest ever cable cross-sectional area
Vanishingly low resistance for better speaker and amplifier control
Enamel coated conductors give a new superior insulator for reduced capacitance and consistent energy flow
Rhodium plated Airloc™ locking plugs:
Maintaining the fidelity of the audio signal from start to finish
Supremus is the result of over 40 years of technological evolution and refinement
Developed without compromise, unmatched in quality
Loop Resistance 0.005 ohms/metre
Dissipation Factor 0.009
Cross-sectional area 6.2mm2
Wire Gauge 10 AWG
Jacket Outside Dia. 17mm
Jacket Internal Dia. 8mm
Conductors - 2 x 16 solid-core silver-plated 99.999% oxygen-free copper
Insulation - unique enamel, with low-loss foamed polyethylene dielectric
Connectors - Rhodium-plated locking Aircore/TM Banana Plugs