Acuphase C2450

High-accuracy, high-rigidity volume sensor assembly with responsive yet solid feel

Although AAVA adjusts the volume level by combining the output of weighted amplifiers, it is operated using a volume knob that appears similar to conventional systems. Internally however there are major differences. The volume sensor mechanism that detects the angular position of the volume knob rests on a frame extruded from a massive aluminum block and finished with utmost precision. The volume knob feels both responsive and solid when rotated and ensures extremely accurate position detection. The entire mechanism is supported on the chassis by a floating suspension using insulators, which has the added advantage of extremely quiet motor-driven operation when the remote commander is used.

Separate unit amplifiers for left and right

The main amplification tasks such as input buffering, AAVA, balanced output, and headphone output are handled by a total of six modular amplifiers for each channel. These unit amplifiers are mounted on a glass epoxy motherboard, with left and right sections being kept completely separate. In order to eliminate unwanted mutual interference between the amplifiers, a sturdy frame is used to provide support. As a result, both electrical interference and physical vibrations are reliably suppressed, creating an ideal operation environment.

Separate left/right power supplies

The power supply circuitry not only acts as the energy source of an amplifier, the current that it supplies to the load also has a significant influence on sound quality. The C-2450 incorporates four custom-made filtering capacitors which are rated for 10,000 μF and have been specially tuned for optimum sonic properties. Along with the power transformer, the entire power supply section is duplicated and kept separate for the left and right channel, resulting in a full mono construction. The entire circuitry from the input right through to the output benefits from a strong and stable supply of current which enhances the quality of the musical signal

Logic-controlled relays for signal switching assure high sound quality and long-term reliability

■ Total of 10 inputs and 5 outputs Thanks to a versatile complement of input and outputs, the C-2450 is ready for any program source combination.

■ EXT PRE function allows use of external preamplifier Setting the OUTPUT selector to the EXT PRE position allows the use of an external preamplifier or other component without having to change system connections.

■ Selectable preamp gain Overall gain can be set to 12 dB, 18 dB, or 24 dB.

■ Eliminate phase differences in balanced connections The PHASE button makes it easy to compensate for differences in absolute phase of any input or output component connected via a balanced link.

■ Independent phase selection for each input position The phase can be set and memorized separately for each input and recorder selector position.

■ On/off switching capability for level display

■ Subsonic filter removes ultra low frequency noise

■ Loudness compensator function offsets the characteristics of human hearing

■ Tone controls using summing active filters for optimum sound quality

■ Dedicated headphone amplifier optimized for sound quality

■ Elegant side panels with natural wood grain finish

■ Thick aluminum top plate with exquisite hairline finish