Dan D'Agostino Progression Pre-Amplifier

The Dan D'Agostino Progression Pre-Amplifier adds new features that were not previously included in a D'Agostino preamplifier. The most noticeable is that the Progression Pre-Amplifier has an optional digital module. The digital module adds coaxial, Toslink, and USB capabilities to the analog base model. A fully differential DAC processes PCM signals up to 24 bit / 384 KHz and DSD signals up to 4xDSD (11.2 MHz). This digital module feeds a discrete, fully complementary, and balanced analog signal path from input to output. The open-loop distortion is less than <0.006% and the open-loop bandwidth extends to over 100 kHz.

Bluetooth remote control

The Dan D'Agostino Progression Pre-Amplifier has a new Bluetooth technology integrated into the included remote control. The Bluetooth backbone extends the range of the remote control by a factor of five and eliminates line-of-sight limitations inherent in IR remote controls.

Volume control

The volume control of the Dan D'Agostino Progression Pre-Amplifier is achieved using a balanced resistor ladder, using high linearity solid-state relays and discrete precision resistors. The bandwidth and transient response of the preamplifier circuit are not affected by the volume setting. The Progression Pre-Amplifier has two independent outputs that can be operated separately or simultaneously to drive a second amplifier in a system based on a subwoofer.

Power supply

The power supply of the Dan D'Agostino Progression Pre-Amplifier is housed in a separate chassis and uses extensive electrical and magnetic shielding to keep radiated interference away from critical preamplifier circuits. Internal circuits filter RF noise on the AC power and compensate for asymmetrical power waveforms and DC on the power grid. A second DC output is included to power future Progression source components.