+ Reply to Thread
Page 2 of 13 FirstFirst 123412 ... LastLast
Results 11 to 20 of 122

Thread: Lightspeed Attenuator

  1. #11
    leo's Avatar
    leo is offline Circuit Junkie & DIY Room Forum Leader
    Join Date: Jan 2008

    Location: Notts UK

    Posts: 1,805

    Default

    Quote Originally Posted by Tom472 View Post
    What source and amp are you using it with Leo?
    Cheers
    Tom
    Sources I've tried it with so far all have active output stages (Buffalo32s and AYA II ) so had no problems regarding drive
    A Pass B1 is reported to work well if you need a buffer

    Amp I tried so far are Hypex UCD's (100k input impedance) I need to try others
    Cheers,
    Leo

  2. #12
    leo's Avatar
    leo is offline Circuit Junkie & DIY Room Forum Leader
    Join Date: Jan 2008

    Location: Notts UK

    Posts: 1,805

    Default

    Quote Originally Posted by Puffin View Post
    I put together a Lightspeed this morning on a piece of perfboard. I sourced the LDRs from Farnell and just picked four out of the bag of 25. (truth is I did not know how to match them!) One of the easiest things I have built. Worked first time (apart from the pot working back to front - but easy to fix).

    I have only listened to it for about an hour, both with headphones and through speakers. Very promising. Will hve to plumb it in to my main system for the acid test.








    Great stuff! if you do like it and decide you want to use it it'll be worth sourcing a matched set of LDR's , in the main system you'll hear straight away if theres a mismatch (unless you was lucky and got a set which was already close) , reason I liked PH's because of the balance control
    Cheers,
    Leo

  3. #13
    Join Date: May 2008

    Location: Surrey

    Posts: 7,103
    I'm Rob.

    Default

    Leo. I have ordered a set of matched LDRs from Uriah on diyaudio. They will be 4 - 5 weeks so I thought I would have a dry run to see how difficult the build was.
    Buy Bose...And get your parking validated!.

    https://youtu.be/ZCBe7-6rw4M

    No Highs...No Lows....It Must Be Bose!

  4. #14
    Join Date: Jun 2008

    Location: N. Ireland

    Posts: 2,475
    I'm Steve.

    Default

    This looks like a genuine alternative to the TVC's that I have seen around, plus the option of a remote adds appeal. I see how the thing works, but would not understand some of the theory behind it.

    all interesting stuff!
    They swim... the mark of Satan is upon them. They must hang.


    FLAC / WDTV Live / Cambridge Audio / Tannoy VX12

  5. #15
    Join Date: May 2008

    Location: Surrey

    Posts: 7,103
    I'm Rob.

    Default

    I used the Lightspeed in my main system today. Very impressive. No channel mismatch, rock solid soundstage and centre image. Brilliant for about £10.
    Buy Bose...And get your parking validated!.

    https://youtu.be/ZCBe7-6rw4M

    No Highs...No Lows....It Must Be Bose!

  6. #16
    Join Date: Jun 2008

    Location: N. Ireland

    Posts: 2,475
    I'm Steve.

    Default

    So if it only cost you a tenner......

    when are you going to start selling them? I would have one to try!

    One observation, I assume since it is not connected to the output then the quality of the pot becomes un-important?

    ;-)
    Last edited by aquapiranha; 31-08-2009 at 20:06.
    They swim... the mark of Satan is upon them. They must hang.


    FLAC / WDTV Live / Cambridge Audio / Tannoy VX12

  7. #17
    Join Date: Mar 2009

    Location: Elland

    Posts: 6,922
    I'm David.

    Default

    i know very little about all this stuff but i do find it fasinating when i see a thread like this and people are making, from what i read, are audiophile pre-amps for £10
    barmy!
    CS Port TAT2 - Benz LPS - Funkfirm Houdini - DS Audio Vinyl Ionizer - CS Port C3EQ - Kondo G70 - Kondo Gakuoh II - Maxonic TW1100 MKII - Isol-8 SubStation Integra

  8. #18
    Join Date: May 2008

    Location: Surrey

    Posts: 7,103
    I'm Rob.

    Default

    Quote Originally Posted by aquapiranha View Post
    So if it only cost you a tenner......

    when are you going to start selling them? I would have one to try!

    One observation, I assume since it is not connected to the output then the quality of the pot becomes un-important?
    ;-)
    Correct.

    You need to have a look at the diyaudio thread on the Lightspeed (240pages) GeorgeHifi sells these commercially for 500AUS$. People need to build these themselves as they are so easy.

    http://www.diyaudio.com/forums/showthread.php?t=80194
    Last edited by Puffin; 01-09-2009 at 06:32.
    Buy Bose...And get your parking validated!.

    https://youtu.be/ZCBe7-6rw4M

    No Highs...No Lows....It Must Be Bose!

  9. #19
    Join Date: Sep 2008

    Location: Hampshire

    Posts: 330

    Default

    Hi Leo

    I will be collecting a batch of LDRs today, do you know how to match these resistors?

    Richard

  10. #20
    Join Date: May 2008

    Location: Surrey

    Posts: 7,103
    I'm Rob.

    Default

    Match.com
    Buy Bose...And get your parking validated!.

    https://youtu.be/ZCBe7-6rw4M

    No Highs...No Lows....It Must Be Bose!

+ Reply to Thread
Page 2 of 13 FirstFirst 123412 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •