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First Live Demo Of New D’Agostino Relentless Monoblock Amplifiers

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  • First Live Demo Of New D’Agostino Relentless Monoblock Amplifiers

    World Premiere Demonstration
    of

    Dan D’Agostino Master Audio Systems’
    Relentless Amplifier





    First public demonstration to be held at the Hong Audio Fair August 8-12, 2018 in Room S426

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    Hong Kong, AUGUST 8, 2018 — Unveiled to the public at the Munich HiFI Show this May, the new Dan D’Agostino Master Audio Systems Relentless amplifier will have its world premiere live demo presentation at the flagship audio show in Asia.

    With its 5.5-kilowatt power supply feeding roughly 100 output devices, the Relentless Monoblock easily delivers 1,500 watts into 8 ohms—and when connected to a 220-volt outlet, it doubles its output to 3,000 watts into 4 ohms and 6,000 watts into 2 ohms.

    “With the Relentless Monoblock, we focused on creating an amplifier without any limits”, said company founder and chief engineer Dan D’Agostino. D’Agostino continued, “We incorporated elements of the Momentum series and new circuit concepts to create an amplifier that maintains its harmonic integrity and expansive soundstage from 0 watts to 1,500 watts. An amplifier so powerful it can drive any speaker to its best possible performance, no matter how demanding the load it may present. It is the best amplifier I have ever created.”

    The Relentless Monoblock employs an all-new, fully complementary topology based around a precision input stage that maintains an essentially perfect balance between the positive and negative components of the signal. Any distortion artifacts that appear on one half of the signal will also appear on the other half, and thus cancel each other. Gain circuits operate in the current domain, assuring the Relentless Monoblock’s performance does not fluctuate no matter what the demands. Global negative feedback is not employed, nor is it required as the amplifier’s open-loop linearity eliminates the need for this performance-robbing technique.

    The core of the power supply is a transformer that uses multiple sections running in concert, all potted and encased in a metal shield. This design reduces transformer noise to near zero and protects the audio circuitry from the transformer’s magnetic field. The transformer feeds a custom-designed rectifier circuit and a 600,000-microfarad/100-volt capacitor bank. A special holder mechanically grounds each capacitor so it won’t vibrate. A slow-start circuit activates the power supply in stages, eliminating concerns about capacitive inrush tripping household circuit breakers.

    D’Agostino’s exclusive Super Rail concept makes maximum use of the incredible resources of this power supply. Super Rail employs higher voltage rails in the sections prior to the output stage, effectively “turbocharging” the amplifier and exploiting the full capability of the output voltage rails—which improves dynamics, lowers distortion, and tightens the amplifier’s electrical grip on the speaker.

    The Relentless Monoblock’s unique heat sink combines copper and aluminum in a thermal engine that wicks away heat from the connected devices. The elaborate elliptical design expands on the venturi heat sink first explored in the Momentum series, and assures that the Relentless Monoblock runs safely and reliably even when delivering its full rated power. Thermal, short circuit, and DC protection are included in a non-invasive but comprehensive defense against any external system faults.

    The entire chassis of the Relentless Monoblock is machined from solid aluminum, for superior shielding, thermal stability and vibration damping. High-precision milling allows the entire chassis to fit together solidly with no visible fasteners.

    The Relentless Monoblock’s new power meter measures more than 8 inches in diameter. The meter’s range and response automatically adjust to the level of the incoming signal, making it easy to read no matter how quiet or loud the musical passage is.

    In keeping with the tradition begun with the Dan D’Agostino Audio Systems Momentum amplifiers, the Relentless Monoblock offers a single XLR balanced input. Speaker connections are made using massive binding posts made from gold-plated brass.

    Just as no audio designer has been more relentless than Dan D’Agostino in his pursuit of perfection, we think it safe to say that no power amplifier has been designed and built to a higher standard than the Relentless Monoblocks.

    The Relentless Monoblock amplifier will begin shipping in June, 2018 at $250,000 USDper pair. Standard finishes include silver or black.

    For more information on Dan D’Agostino Master Audio Systems and its products, please visit dandagostino.com
    Myles B. Astor, PhD, Administrator
    Senior Editor, Positive-Feedback.com
    ________________________________________

    Magico S5 Mk.2 speakers, cj ART300 40th Anniversary monoblock Amplifiers; cj GAT preamplifier Series 2; Doshi V3.0 and Thoress Mk. 2 phonostages; VPI Vanquish turntable/12-inch 3D tonearm/12-inch Fat Boy, SAT LM-12 arm, Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges; Technics RS1506 with Flux Magnetic heads/Doshi V3.0 tape stage run balanced; Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords. Stillpoint Aperture panels, SPod Magico feet, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC. Symposium ISIS and SRA Craz racks; Audiodharma Cable Cooker; Symposium Ultra and assorted SRA platforms.

  • #2
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    Myles B. Astor, PhD, Administrator
    Senior Editor, Positive-Feedback.com
    ________________________________________

    Magico S5 Mk.2 speakers, cj ART300 40th Anniversary monoblock Amplifiers; cj GAT preamplifier Series 2; Doshi V3.0 and Thoress Mk. 2 phonostages; VPI Vanquish turntable/12-inch 3D tonearm/12-inch Fat Boy, SAT LM-12 arm, Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges; Technics RS1506 with Flux Magnetic heads/Doshi V3.0 tape stage run balanced; Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords. Stillpoint Aperture panels, SPod Magico feet, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC. Symposium ISIS and SRA Craz racks; Audiodharma Cable Cooker; Symposium Ultra and assorted SRA platforms.

    Comment


    • #3
      That’s one impressive LOOKING piece of hardware.
      Magico M-Project, CAT JL7s, CJ GAT/darTZeel 18NS, Kronos Pro Limited Edition/Black Beauty/Atlas SL/Opus-1,CH Precision P1, Schiit Yggdrasil, KS Elation ICs & SCs

      Comment


      • mep
        mep commented
        Editing a comment
        The transformer in the KSA-250 weighs 83 lbs. it’s massive.

    • #4
      Dan is looking good. he must've dropped 60# or more, good for him!!

      looking under the hood (deja vu?) except for the different stickers gracing the xfmrs, it appear he's using the same 1 kvA potted toroidal power xfmr he used on the krell ksa 250 from all those years ago, I know I owned two! (MDA500).
      How Do You Beat Audiophile Nervosa?

      Step Number 1: Upgrade your music collection first. If you do it correctly that should keep you busy in perpetuity.

      Comment


      • Joe Pittman
        Joe Pittman commented
        Editing a comment
        Dan must be working out by lifting his amps.

      • MylesBAstor
        MylesBAstor commented
        Editing a comment
        Why Dan hired all those young kids!

    • #5
      These arc-welders just encourage harder to drive inefficient speakers.

      Comment


      • Rust
        Rust commented
        Editing a comment
        These aren't the arc welders, it was one of the old Krells that someone hooked a frequency generator to feed it square waves and used it to do some tig welding.

    • #6
      Some years ago, folks were cooking in their car engine compartments, and dishwashers. Who will be the first to lay a tenderloin inside their D'Agostino Relentless?

      Comment


      • #7
        I saw the beast in person @ the HK hifi show. Even thou I am an owner of a stereo Dag, this was just too over the top with little sophistication and garish. the copper circles on top are plain ugy
















        ​​​​​​​

        Comment


        • #8
          Certainly Dan has produced some legendary components over the years, and is held in high esteem, however, when I viewed the photo of the amp showing the top my first impression was that it looked like it belonged under the hood of a race car.
          Speakers, Wilson Audio Sasha 2's; line stage, ARC Ref 6; phono pre ARC Ref 3; Amplifier, ARC Ref 75 SE; turntable, Dr. Feickert Firebird with a Kuzma 14 inch 4 pt and Transfiguration Proteus; CD player Ayre C 5 xe; tuner, Magnum Dynalab MD109 SE; Dr. Feickert Analogue CBPS; Double Matrix Professional Sonic RCM; Transparent Audio Isolator 8; Transparent Super cables and IC's; and a Atocha Designs Record Cabinet

          Comment


          • #9
            If there was ever a Amp that belonged in the Movie Clock Work Orange this is it .

            Comment


            • #10
              Originally posted by Metamatic View Post
              I saw the beast in person @ the HK hifi show. Even thou I am an owner of a stereo Dag, this was just too over the top with little sophistication and garish. the copper circles on top are plain ugy
















              Certainly not a look for everybody as you have expressed.

              ​​​​​​​However, having seen and heard these in perspective, sitting next to and driving the WAMM, I would disagree completely. That it looks like it belongs there is no accident.

              Comment


              • Doxycc
                Doxycc commented
                Editing a comment
                Dan certainly has an aesthetic point of view. Love or hate - it's singular (like Metaxas).

            • #11
              Originally posted by metaphacts View Post

              Certainly not a look for everybody as you have expressed.

              ​​​​​​​However, having seen and heard these in perspective, sitting next to and driving the WAMM, I would disagree completely. That it looks like it belongs there is no accident.
              Maybe some of us older audiophiles need the bigger display! Those readouts on my cj gear looking smaller and smaller. Soon going to need binoculars!
              Myles B. Astor, PhD, Administrator
              Senior Editor, Positive-Feedback.com
              ________________________________________

              Magico S5 Mk.2 speakers, cj ART300 40th Anniversary monoblock Amplifiers; cj GAT preamplifier Series 2; Doshi V3.0 and Thoress Mk. 2 phonostages; VPI Vanquish turntable/12-inch 3D tonearm/12-inch Fat Boy, SAT LM-12 arm, Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges; Technics RS1506 with Flux Magnetic heads/Doshi V3.0 tape stage run balanced; Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords. Stillpoint Aperture panels, SPod Magico feet, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC. Symposium ISIS and SRA Craz racks; Audiodharma Cable Cooker; Symposium Ultra and assorted SRA platforms.

              Comment

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