APL PRE-GR Reference Tube Preamplifier

 Signal Processing

* Microprocessor controlled discrete attenuator module with precision 0.75dB steps.
* Memorized attenuator levels for each input.
* Differential tube output stage featuring ECC99 tubes.
* Zero Negative Feedback.
* Custom-made Lundahl output transformers featuring Oxygen Free Copper windings.
* Non-magnetic resistors of the highest possible quality.
* Internal wiring by Esprit Audio, France for the analog signal path.
* No mechanical switching devices on the signal path or on the power supply lines.

Power Supply
* Oversized Custom R-Core balanced power transformer wound with OFC.
* Super-large capacitor filter bank.
* High grade, specially selected rectifiers and passive components.
* High quality power filtering choke made by Lundahl.
* Delayed High-Voltage power for increased tube life.
* Solid Oxygen Free Copper wiring for the power supply as well.

Convenience and mechanical
* Large FLD display made in Japan by Noritake.
* Custom selectable colors, Red, Blue or Green. Please specify when ordering.
* Average temperature display for internal temperature.
* Infrared Remote Control capable of controlling.
* Very solid All-Aluminum precision machined enclosure, same size as the DSD-GR

SPECIFICATIONS

Analog Inputs
* Two Single Ended RCA inputs with top line Furutech connectors.
* Two Balanced input with top line Furutech XLR connectors.
* Input impedance 12k Ohms.

Analog Outputs
* Single Ended RCA outputs with top line Furutech connectors.
* Balanced XLR output with top line Furutech XLR connectors.
* Output impedance approximately 150 Ohms, resistor limited.

Power input and fuses
* IEC power inlet made by Furutech NCF series.
* 115V or 230V / 50-60Hz, factory pre-set.
* Other power input voltages available on request.
* 2A special ceramic fuse.

Dimensions and weight
* W450 x H120 x D380 millimeters.
* Height with feet included – 140 millimeters.
* Weight – 22.5kg unpacked.