SPECIAL DESIGN FEATURES
MACHINED ALUMINUM CHASSIS:
Preamplifier circuitry housed inside single ultra-
low resonance, structurally rigid chassis precision-machined from a solid ingot of
aircraft grade 6061-T6 aluminum, completely sealed for trouble-free operation,
yield maximum electrical/EMI/RF isolation.
FUNCTIONAL ISOLATION:
Power supply is confined inside external machined
aluminum chassis. Sensitive audio circuits isolated from power supply in main
preamplifier chassis. Left and right channel circuits are further isolated into
individual milled aluminum pockets in a true dual mono design for ultimate RF
and EMI shielding.
FREE OF INTERNAL SIGNAL POLLUTION:
Control subsystem taken completely offline
after each command execution to maximize sound purity. All signal switching
relays are “latching” type which only draw current for a few milliseconds during
the switching event then revert to a no current “off” state.
AUTOMATIC WORLDWIDE OPERATIONS:
Auto-sensing and auto-ranging SMPS
provides optimum performance at any world-wide mains operating voltage
between 85V and 265V.
CERAMIC CIRCUIT BOARDS:
All audio circuits are implemented on military-grade,
multilayer, low dielectric constant, Rogers™
ceramic
circuit board substrate for
extremely low energy retention and absorption. Large low impedance ground
planes for extended internal star-grounding. Newly developed ceramic capacitors
replace conventional electrolytic type, resulting in power supply noise decoupling
improvements by an order of magnitude (10X).
SHORTEST SIGNAL PATH:
Gain stages, based upon ultra-low noise differential
balanced audio amplifiers, are implemented into the shortest signal path of any
previous Rowland preamplifier. All signal paths are balanced from input to output
for maximum noise rejection.
DUAL-ZONE PREAMPLIFICATION:
Separate 2nd gain stage for record outputs offers
same circuitry as the primary signal path with independent volume control.
TRANSFORMER-COUPLED:
All inputs and outputs routed through professional
grade Lundahl transformers for maximum common noise rejection, EMI immunity,
and cross-component compatibility. Transformer coupling also ensures invariant
gain for all balanced inputs and outputs. When used with input transformer
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