Plateau Camber 3.5 loudspeaker RH's 1990 System
The reference system used to audition the four loudspeakers reviewed here includes the VTL 225W Deluxe monoblock and Krell KSA 200 amplifiers, driven by a Theta DSPro Basic digital processor through the passive Electronic Visionary Systems Stepped Attenuator. The analog front end was a Well-Tempered Turntable and tonearm fitted with a Sumiko Boron vdH cartridge. Phono preamplification was provided by the Precision Audio outboard phono module, connected to the passive attenuator. The phono preamp has enough gain for the moving-coil Sumiko and is able to drive the amplifiers through 20' of interconnects.
A 1m pair of AudioQuest Lapis connected the Theta to the EVS Stepped Attenuator, and the power amplifiers were connected by a 20' pair of Lapis. Cable between the Well-Tempered/phono preamp/Stepped attenuator was provided by Music Metre interconnect. Speaker cable was 3' runs of bi-wired AudioQuest Clear Hyperlitz or 10" runs of bi-wired AudioQuest Green Hyperlitz. The VTLs' monoblock construction enabled the use of the shorter cable, while the Krell required the 10' speaker-cable runs. The Phantom Acoustics Shadow, an active low-frequency room-control system, was turned off during the auditioning.Robert Harley