Dan D’Agostino - Relentless - Reference Stereo Preamplifier

The Dan D’Agostino Relentless Reference Stereo Preamplifier represents the company’s ultimate expression of analog control and signal management, engineered without compromise for the world’s finest music systems. Utilizing a fully balanced discrete topology and an advanced multi-chassis architecture, the Relentless delivers extraordinary transparency, dynamic precision, and tonal realism while maintaining absolute control over the signal path.

Designed as effectively two independent dual-mono preamplifiers within a single platform, the Relentless employs physically separated audio stages with an isolated central power supply system for exceptional channel separation and ultra-low noise performance. Extensive shielding, independent analog and digital regulation stages, and precision-matched circuitry preserve signal integrity while allowing enormous voltage swing and remarkable bandwidth.

The Relentless also incorporates advanced system flexibility through dual-zone operation and an optional Digital Streaming Module supporting high-resolution playback and network streaming integration. Finished in a massive precision-machined aluminum chassis with copper detailing and a redesigned reference-grade control interface, the Relentless establishes a new benchmark in reference stereo preamplifier design.

Available in Silver or Black finishes

FEATURES

• Reference fully balanced stereo preamplifier design
• True dual-mono analog architecture
• Three-chassis construction with dedicated central power supply
• Fully discrete complementary signal topology
• Independent analog and digital power regulation stages
• Two-zone / two-source operation capability
• Five balanced XLR stereo inputs
• Two balanced XLR stereo outputs for Zone 1
• One balanced XLR stereo output for Zone 2
• Optional Digital Streaming Module (DSM)
• PCM playback up to 32-bit/384kHz with DSM
• DSD256 support with DSM
• MQA decoding support with DSM
• Roon Ready capability with DSM
• Ethernet and Wi-Fi network connectivity with DSM
• USB-B, optical, and SPDIF digital inputs with DSM
• Precision stepped volume control system
• Advanced RF filtering and AC line conditioning circuitry
• Bluetooth remote control included
• RS-232 control integration
• Precision-machined aluminum and copper chassis construction
• Hand-built in the USA

SPECIFICATIONS

Type: Reference Stereo Preamplifier
Topology: Fully Balanced Dual-Mono Discrete Design
Frequency Response: 0.1Hz – 120kHz, ±0.0dB
Signal-to-Noise Ratio: >100dB A-weighted / >105dB unweighted
Gain: +6dB / +10dB selectable
Total Harmonic Distortion: <0.006%, 20Hz – 20kHz
Analog Inputs: 5 Pairs Balanced XLR Stereo
Digital Inputs (Optional DSM): SPDIF Coaxial, Optical, USB-B, RJ45 Ethernet, Wi-Fi
Outputs: 2 Pairs Balanced XLR Stereo Outputs (Zone 1), 1 Pair Balanced XLR Stereo Output (Zone 2)
Control: RS-232, Bluetooth Remote Control
Power Transformers: Dual 150VA Toroidal Transformers
Filter Capacitance: 26,400μF
Dimensions (W × H × D): 17.0 × 13.75 × 17.0 in. (43.2 × 34.9 × 43.2 cm)
Weight: 132 lbs (60 kg)
Finishes: Silver or Black