diyhifisupply press

Author: simon

  • Obbligato PSU Capacitors

    With Blackgate disappearing over the horizon we need to find a new solution or fall back on the dreaded electrolytic! A key measurement is dissipation factor which measures how much of the signal gets soaked up by internal losses (power supply ARE in the signal path). Some sample DF measurements at 100hz.

    * Rubycon Electrolytic 47uf/450v: 0.061
    * Panasonic 47uf/450v: 0.035
    * Blackgate 22uf/350v: 0.026
    * Obbligato Power Cap 47uf/500v: 0.00015!

     

    You CAN hear the difference. Purpose designed Obbligato Premium Film Power Supply Film Caps. Not oil filled, non-polarized, non-directional. Although rated at 47uf/500v and 100uf/400v these are not like electrolytic’s that pop when over voltaged and can be safely used in circuit to rated maximum. Constructed axially for the lowest possible inductance. Wound tight with no voids.

    Capacity Unit Price (USD)
    100uF $52.00 [wp_cart_button name=”PSU cap 100uF ” price=”52″]
    47uF $33.00 [wp_cart_button name=”PSU Cap 47uF ” price=”33″]

    Shipping cost : $8 – Hong Kong Post airmail.

    For other shipping options, Check our Website by clicking the icon below:

    Store

    online store

  • Obbligato Copper Film Capacitors

    These Obbligato film caps have a solid copper case, soldered copper lead-out wires and individually wrapped. All measure very close to rated value, max 5% but typically 1-2%. Wound tight with no voids and give a very transparent, smooth sound. 
    Capacitance Dimensions Unit Price (USD)
    0.047uF 15 X 18 mm   $2.50
    0.15uF 15 x 18 mm $3.25
    0.33uF 15 x 25 mm   $4.90
    0.68uF 22 x 25 mm $7.00
    1.5uF 22 x 35 mm $9.00
    3.3uF 35 x 45 mm $14.50
    4.7uF 35 x 45 mm $16.50
    6.8uF 35 x 55 mm $18.50
    Shipping cost : $8 – Hong Kong Post airmail.
    For other shipping options, Check our Website by clicking the icon below:Store

  • Crescendo Ribbon Horn Speaker

    crescendo_2b-700x350

    Crescendo Ribbon Horn Speakers

    Summary:

    • Dynamic
    • Transparent and immediate. Comparable to open baffle speakers.
    • Very wide bandwidth. Horn ribbon covers 600hz to 23khz
    • Small size (10” x 15” x 24”)
    • High efficiency (98db)
    • Easy to drive even with 300B SET amps
    • Extreme quality crossover parts: all film caps, oil paper plus copper foil inductors etc.

    Below is the possible combination of costs for a pair of bookshelf Crescendo Horn Ribbon Speakers.

    Basic kit Basic plug-and-play Advanced kit Advanced  plug-and-play
    Drivers $690 1pr 1pr 1pr 1pr
    Crossover $380 1pr 1pr 1pr 1pr
    Binding post $12 1pr 1pr 2prs 2prs
    Bass improvement $220 1pr 1pr
    Cabinet and assembly $750 1pr 1pr
    Total Cost including airmail $1082 $1832 $1314 $2064

     

    OLYMPUS DIGITAL CAMERA

    Left picture: Crescendo Bookshelf Speaker

    Total cost including airmail $2064

     

     

     

     

    Crescendo Speaker Tower

     

    Left picture : Grand Crescendo Speaker System

    Active base (110v or 220v)

    Total cost including airmail: $3000

     

     

     

     

    Specification:

    You can download the specification and design here.

     

     

     

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  • Obbligato Film Oil Capacitors

    Very good value-for-money.

    Capacity Dimension Unit Price (USD) Matched pair price (USD)
    2.2uF 40mm x 55mm $6 $14
    4.7uF 40mm x  55mm $7 $15
    6.8uF 40mm x 60mm $9 $18
    10uF 40mm x 85mm $12 $24
    22uF 45mm x 115mm $17 $35
    33uF 50mm x 115mm $22 $45
    47uF 55mm x 115mm $30 $60
    68uF 60mm x 115mm $35 $71
    100uF 65mm x 135mm $47 $95

    Shipping cost : $8 – Hong Kong Post airmail.

    For other shipping options, Check our Website by clicking the icon below:

    Store

  • Obbligato Gold Premium Film Capacitors

    These are our best selling capacitors. The sound is smoother and clearer than the copper Obbligato caps. These Obbligato capacitors are premium polypropylene film in a non-magnetic case. Values are laser etched into the surface. Pure copper soldered lead out wires.

    Capacity Voltage Size (DxL in mm) Unit Price (USD) Matched pair price (USD)
    0.047uF 630VDC 15 x 17 $6 $13
    0.15uF 630VDC 15 x 21 $8 $17
    0.1uF 630VDC 15 x 25 $7 $15
    0.22uF 630VDC 15 x 25 $10 $21
    0.33uF 630VDC 15 x 30 $11 $23
    0.47uF 630VDC 20 x 30 $12 $25
    0.68uF 630VDC 20 x 35 $13 $27
    1.0uF 630VDC 20 x 35 $14 $29
    1.5uF 630VDC 20 x 40 $15 $31
    2.2uF 630VDC 20 x 40 $17 $35
    3.3uF 630VDC 25 x 50 $19 $39
    4.7uF 630VDC 30 x 55 $21 $43
    6.8uF 630VDC 30 x 60 $24 $49
    10uF 630VDC 30 x 55 $27 $55
    15uF 250VDC 30 x 55 $23 $47
    22uF 250VDC 35 x 75 $28 $57
    33uF 250VDC 40 x 80 $38 $77
    47uF 250VDC 45 x 80 $46 $93

    Shipping cost : $8 – Post Office Registered Airmail.

    For other shipping options, Check our Website by clicking the icon below:

    Store

  • EZ UTS-Projekt Phono-Sweet Sounds

    EZ UTS-Projekt Phono

    Yesterday we got the UTS EZ linestage with Extensions into the system.

    The shaft extensions make a difference: sound is improved

    1. more immediate, micro-macro dynamics resolved more easily, big transients seem strike from out of nowhere and delicate sounds present themselves with noticeable finesse
    2. self-noise has dropped significantly; ~0.2mv which is close to our limit to measure and maybe explains some of #1
    update: with 0.4mm copper tube shield in place, grounded to chassis it drops to 0.1mv!
    3. The tactile quality of switch action is much improved due to the effect of the flexi connection between shaft and switch. IMO clunky switching puts the ears in a bad mood

    We will still try some other enhancements:
    coupling caps – we have the obbligato tin foil and a sample pair of paper-in-wax aluminum foil (huge)
    tube shield, et

     

  • Mini Tube Amp (12AX7+EL84)

    Mini Tube Amp is so small that it can fit in bedroom, office desk etc. With 90dB speakers we can listen comfortably in a 30sq meter room. The amplifier is small but sound amazingly good.

    FREE Obbligato Premium Gold caps upgrade

    FREE silver banana plugs 4 pcs

    FREE shipping

    10% discount on TJ Full Music tube upgrades

    Specification:

    • Tubes used : 2 x EL84 and 12AX7
    • Output: 3.5W + 3.5W, 4/ 6 / 8 ohms

    Price includes:

    • 1 x Intergrated amplifier
    • 1 x 12AX7
    • 2 x EL84
    • 4 x silver banana plugs
    • 1 Year Warranty
    • Shipping included

    [ SEE PHOTO GALLERY]

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  • EZ UTS-Projekt Phono

    EZ UTS-Projekt Phono

    EZ UTS phono stage.

    As shown in the UTS manual. Basically a 2-UTS-modules-in-series-and-RIAA-network sandwich.

    EZ

    We found it needs 2 power transformers. Reason: to break ground loops and forestall AC filtering imbalance since in a phono stage noise is a paramount issue.The transformers are placed in a separate steel box for shielding.

    AC wires need to be shielded and the shield connected to IEC chassis ground (anyone know any good spooled AC cord with 100% shielding?).

    Result: state-of-the-art low noise (0.1mv self noise) and big dynamics tube phono stage with about 36-38db gain (depending on tubes)

    And – it’s EZ!

    The recipe:
    Large Project box with feet, connectors and switches etc
    Steel enclosure for power transformers
    2 UTS modules and 2 power transformers
    RIAA parts
    AC wire braided shield

    Assemble, connect, plug and play!
    EZ and no noise tomfoolery.

  • Wedding Bells at DIYHFS

    Wedding Bells at DIYHFS

    The happy couple:
    UTS (Universal Tube Stage)
    +
    UVC (Ultimate Volume Control)

    Their happy home:
    240mm Projekt Bungalow

    The marriage proceedings couldn’t have worked out better and one would wish all weddings were like this one.

    Yes it’s still the honeymoon but this one promises to go the distance. This couple were truly made for each other.

    I usually cry at weddings but this one makes me smile.

     

  • When is Ultimate Ever EZ?

     

    Now.

    Check this out:
    at the front we have the controls and the power supply. All the digital bits flow across those ribbons to selector (left), volume (right) and the audio signal board (chassis back).

    The audio signal board uses end-to-end analogue potentiometers to adjust volume and vacuum silver relays to select source. The great thing is the audio signal board can be mounted beside the I/O jacks and the power supply can be put far away. This minimizes noise and maximizes musical fidelity.

    Quiet it is. Next week I’ll report some measurements.

    Now notice the 2 little round circles with roach-like occupants, flanking the 2 red caps on the audio board. Those are the LSK389 JFET so that the JFetted outputs can drive any load (Zout 50 ohms!). But, these can be bypassed with the direct out connection going to another set of outputs. You’d want to keep the cables very short if used direct out.

    EZ.

    We will also offer a CNC’d front plate just like you see to premount the Control matrix board (the one attached to the knobs) to be used with your own chassis.

    EZ’r.

    Now how about those 127 steps? It’s the first time we’ve ever had a device with 127 step attenuation. It’s like having 5.5 x 23 step volume controls. What’s it like to use? Jailbreak! Really. It’s like the difference between looking at the world through prison bars or looking out a panoramic window.

    And the sound: surprisingly smooth. Why surprisingly? Because it ain’t got tubes! But it is passing along 100% of the tube-sound upstream.

    More.