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  1. L

    Attenuation should be clarified as different to pre-amplification

    What sort of passive pre are you even referring to ? Low level listening with high sensitivity horns is catered for in the link by adjusting the start circuit to be silencing volume commencement where you require Any loading additional on the shunt circuit of a unknown type of passive pre...
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    Attenuation should be clarified as different to pre-amplification

    Hi Don Would you like to try it in your audio system ? Whilst your comments apply to other prior efforts, all the points you advise on are solved. I can refer you to a subjective review here: https://www.stereonet.com/forums/topic/563813-latest-passive-ldr-attenuatorpreamp-kit-build/ Your...
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    Attenuation should be clarified as different to pre-amplification

    Always without involving any contacts. once within the chassis, There is then no audio degradation from wiring and switching inputs or involving volume wiper contacts. Other methods such as resistance potentiometers traditional since the mid 1960's sadly have none of the good audio quality...
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    Attenuation should be clarified as different to pre-amplification

    In my opinion a important aspect of audio reproduction is being missed, by not properly recognizing attenuation as being different to (pre) amplification. The preamplifier introduced as early as 1955 served a purpose , when there were no line level standards. Today's line level sources as a...
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    Your All Time Favorite Preamplifiers?

    It is a folklore quoted saying, inferring that gain causes unwanted distortion, and it would be preferable if a straight wire just had amplifying capability. It though is quaintly possible. if we use instead the word maintain instead of gain, the first of these, the electronics property of...
  6. L

    Your All Time Favorite Preamplifiers?

    Not a issue if as i do, if you make your own. Particularly when they are not connected :)
  7. L

    Your All Time Favorite Preamplifiers?

    Totally agree, designs that get everything right have a philosophy biased toward subjective appreciation. Those involved designing and soldering might as example be well versed in listening to live acoustic music, as well as having ability of comparison to best available recordings. This can...
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    Your All Time Favorite Preamplifiers?

    Conventional passives Yes can be tailored to not adversely load the source component, Most passives though don't take the next step sadly being reliant on way over simplistic design where usually a potentiometers fixed value, rearranges all the excitement of what is actually possible. The...
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    Your All Time Favorite Preamplifiers?

    I have over 15 years experience with encapsulated audio purpose LDR's, ( different to open face types ) the rich harmonic spectrum you refer to above, is not the LDR itself, rather a statement ( if it occurs ) of the mistakes being made, in powering the internal LED. I have also built many...
  10. L

    Your All Time Favorite Preamplifiers?

    It remains passive volume controls are compelling
  11. L

    Your All Time Favorite Preamplifiers?

    It might be easier to just distance yourself as far as you can from the block of text altogether. For example stating passives cannot control the flow of current is just a asking for can of worms, as in partnership with circuitry either side they obviously cause current to pass, which is the...
  12. L

    Your All Time Favorite Preamplifiers?

    So pleased that was not your own block of text, as it contains so many errors and misinformation. As example there is no amplifying device that is entirely linear, as as soon as you add power to a circuit you add either very small partially acceptable, or indeed unacceptable distortion...
  13. L

    Your All Time Favorite Preamplifiers?

    But sadly adds reactance, returning a quarter cycle later to the circuit. Resistance types have, as a result better linearity with audio signal
  14. L

    Your All Time Favorite Preamplifiers?

    With a well designed passive, true there is no added coloration from added by gear. Rather there is the same drive and dynamics as the music was recorded with, ..exactly as it should be. Passive types are many and everything should be considered.
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    Your All Time Favorite Preamplifiers?

    Yes they can, you can have all the dynamic content with utmost clarity you require, if you allow the shunt resistance to be independent of the series, so two quite different curves. This allows to adjust or shape the shunt resistance so as never to load the source component. Lower volume is...
  16. L

    Your All Time Favorite Preamplifiers?

    It helps to realize that consumer line level does not need changing upward, in the process where it, by amplifying further, introduces distortion. Rather attenuation is all that is needed, where power amps have compliance to consumer line level. In the case of RIAA these can be stand alone...
  17. L

    Your All Time Favorite Preamplifiers?

    I disagree, as they ( passives ) can. It requires a power amp with sensitivity matching consumer line level , and to have shunt resistances and series independent of each other. In this scenario there is more than adequate if not bountiful dynamics and drive.
  18. L

    Abbey Road SACD mastering tricks

    Interesting video on transfer done at Abbey Rd. The things I liked were their catalog was able to find a secondary source of material. What I didn't like was the coming out of digital format to analog for EQ. A DBX Quantum is capable of doing EQ in the digital domain, as are many other products.
  19. L

    My new project : phono preamp

    You have described it well, its a good rule of thumb as it defines the amperage required of the rectifier diodes. when placed to charge and maintain capacitors whilst also switching AC.
  20. L

    Resistors and Resistor types

    The problem though with resistors and audio is not the resistor, but what it then connects to which sadly invariably is a switch or wiping contact Here is a much better resistor for audio if this dicussion includes where it then connects to. It is of couse a audio grade LDR where...
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    Why are downloaded cd's so expensive? Is it a rip-off?

    My advice would be to steer clear of proprietary file types if downloading, as over time they will no longer work due to the proprietary file owners invariably moving the goal posts. Stick to Flac and Ogg, which are free formats and typically much better in sound quality.
  22. L

    linux mint 17

    Hi Has anyone tried Linux mint 17 ?, it looks to be a great operating system with nice features. i tried it and really like it
  23. L

    Yet another look at Jitter: Clock Extraction

    Hi In June of 1997, I had an article published concerning overcoming SPDIF, which was republished here: http://www.enjoythemusic.com/magazine/viewpoint/0401/deficienciesofspdif.htm My findings were that it is better to view digital transmission as the individual word lengths ie Data, LRCK (...
  24. L

    RG58 Coax as audio cable

    Thanks ACHipo, once installed in your system as the major type of cable, it dawns on you I find - how good it is.
  25. L

    Your latest music purchase!

    My last CD purchased was John Abercrombie 39 steps
  26. L

    My new project : phono preamp

    Hi Do you have a schematic that you are following ? The rule of thumb for capacitance is 1000 uf for every amp of current, and its common for inductance in the form of a choke to supply the valve anodes. the second transformer is I take for the 6.3v heaters. All the best with your project.
  27. L

    Kate Bush - The Red Shoes (April 2015)

    Hi Also really appreciate Kate's music, Hounds of Love and Aerial in particular. Red shoes too
  28. L

    What is the best hardware solution to Play and Safeguard your PRECIOUS audio files?

    Hi The type of file being stored I use is FLAC because its very high quality and has lower data size than proprietary equivalents Ogg is another nice option to use too if SQ is slightly less needed. I presently use Yamaha CDRHD1500 recorders and store Type 1 DBX audio, as it gives a very analog...
  29. L

    RG58 Coax as audio cable

    Hi RG58 coax the variety that has a silver proper braid, not strands of copper is well worthwhile trying as interconnect It needs good end fittings. I presently use it for both interconnects, digital links and speaker cable, where i keep the outer as a shield for both positive and negative...
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    Oh boy, the Bose 901 again

    The 901 Series 1 and 2 were apparently quite good, but then the worst invention for audio akin to disposable nappies, the foam bass driver surround happened. There must be many rooms full of unused 901's with rotting foam, and owners using them as lower stands for decent speakers. I recently...

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