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Thread: Rowland Aeris DAC

  1. #21
    Inside part 2





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  2. #22
    Inside part 3

    Close - starting to the right of the circuit board

    Power from PSU comes here

    Fairchild MOSFET's


    Linear Technology Regulators


    An old USB receiver from TI - TAS1020B


    From TI "This product is not recommended for new designs"
    Why not use 24/192 Cypress USB receiver instead of the old TAS1020B?

    Xilinx Spartan FPGA/DSP, Two gold crystal clocks over the Spartan.


    Under Spartan there are three chips.


    Left - AD1895: 192 kHZ Asynchronous Sample Rate Converter
    Middle - Xilinx Flash for the Spartan FPGA chip
    Right - AKM 4113 24/192 S/PDIF receiver

    Going to the left of the circuit board

    At the top - more old technology.


    One AD1853 delta sigma 24/192 dac chip.

    Under the dac chip there are two Lundahl LL1588 transformers


    http://www.lundahl.se/pdfs/datash/1588.pdf
    Last edited by wizard; 02-26-2012 at 10:05 AM.
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  3. #23
    Member Sponsor Addicted to Best! flez007's Avatar
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    Looks awesome!

  4. #24
    "From TI "This product is not recommended for new designs" ?
    Why not use 24/192 Cypress USB receiver instead of the old TAS1020B?"

    I thought the same thing. I thought the new "in" thing is higher sampling rates, and usb is the newest flavor of the month with 24/192. ?

    Simply stunning to look at.

  5. #25
    Rowland Aeris vs the new Berkeley audio Alpha 2 Reference DAC? Well this would be an interesting comparison for the devoted JRDG Aeris types who seem to really enjoy the JRDG DAC.
    All things being equal in a system w/ JRDG amps, preamps and the like is it likely the Alpha 2 ref. Dac might be a tad more resolving, airy, spatial and detailed?
    The power supply that comes w/ the Rowland is going to be hard to exceed in a single chassis unit like the Alpha 2 Ref. There are few JRDG dealers who also handle Berkeley Audio.

  6. #26
    I went from an M1 to the Jeff Rowland Aeris DAC. This is what I hear in my system: The Aeris provides more detail, without brightness. In comparison the Bricasti is on the slightly dark side of neutral...consequently cymbals in particular have less detail on the Bricasti, but alive and real with the Aeris. Solo instruments emerge from a darker background, soundstage is wider and definitely more space between instruments. I do have a Jeff Rowland Continuum S2; therefore the results maybe because of the synergy between the Rowland components. Both are great DACS!

  7. #27
    I am hoping to have the opportunity to hear the Aeris/PSU to the Berkeley Reference DAC 2. I think that, with the PSU, this might be a very interesting comparison.

    Quote Originally Posted by musicargyle View Post
    Rowland Aeris vs the new Berkeley audio Alpha 2 Reference DAC? Well this would be an interesting comparison for the devoted JRDG Aeris types who seem to really enjoy the JRDG DAC.
    All things being equal in a system w/ JRDG amps, preamps and the like is it likely the Alpha 2 ref. Dac might be a tad more resolving, airy, spatial and detailed?
    The power supply that comes w/ the Rowland is going to be hard to exceed in a single chassis unit like the Alpha 2 Ref. There are few JRDG dealers who also handle Berkeley Audio.

  8. #28
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    Hi Mrdean, I am very much looking forward to your comparative impression of Aeris augmented by the new Rowland Power Storage Unit (PSU) versus the Berkeley DAC!

    Guido
    Guido D. Corona

    Esoteric X-01 Ltd, Rowland Aeris DAC + Rowland Power Storage Unit (PSU), Rowland M925 monos, Vienna Die Muzik, Cardas Clear Beyond XL PCs and Cardas Reflection signal wires

  9. #29
    Hi,
    Any further experiences and comparisons with actual DACs, maybe in combination with the PSU?
    Please report!

  10. #30
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    Hi Birdwatcher, I have been using PSU with Rowland Aeris.... The result is exceptional.... It is a quantum leap in dimensionality of the stage and images to start with... But also of transparency of the sound and enhancement of harmonic richness across the spectrum, from the deep bass to the high treble, without any increase in intermodulative artifacts... The application of PSU to Aeris makes my system profoundly more immersive and involving than before. PSU would be a very difficult component for me to give up.


    PSU can feed three line-level devices simultaneously.... Aeris, Rowland Corus, and one upcoming Rowland device.
    PSU is a dedicated external power supply which feeds pure DC continuously from a single bank of ultracapacitors, using a 40% discharge/recharge duty cycle. The ombelicals connecting PSU to compatible devices fit into dedicated sockets in the target device, not into standard IEC connectors.

    PSU is not compatible with arbitrary DACs or preamplifiers... Do not try... Any "successful" attempt to feed PSU into non compatible components will result in.... Sparks, a delicate scent of charred electronics, and.... Some really expensive and pretty boat anchors *Grins!*

    Regards, Guido
    Guido D. Corona

    Esoteric X-01 Ltd, Rowland Aeris DAC + Rowland Power Storage Unit (PSU), Rowland M925 monos, Vienna Die Muzik, Cardas Clear Beyond XL PCs and Cardas Reflection signal wires

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