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  1. Shipments will be made again from monday 2:nd of August. No shipments will be made 26-30th of july. Vaccation time!
  2. New visitor? register to post on the forum and access all docs. Returning visitor? you can recover your password here
  • News RSS Feed

    AMP15 Performance Measurements 

    by
    JanAF
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    Categories:
    1. AMP7, Truepath, AMP15
    Article Preview

    AMP15 was designed with very low distortion and noise, THD+N, as a goal. There is a design note about AMP15 available elsewhere ...
    Read More Read More 1 Comment

    Lots of 41Hz based Boomboxes at the Roskilde Festival 

     Number of Views: 1213 
    Categories:
    1. AMP6x
    2. AMP9x
    Article Preview

    There will be at least a dozen 41Hz amp based Boomboxes at the Roskilde festival.

    The Roskilde festival ...
    Read More Read More

    Write an article, win a kit! 

    by
    JanAF
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    Published on 14-Jun-10 00:43  Number of Views: 419 

    I am happy to have the new web site in a decent shape! There are always some more things to do but I am quite pleased now ...
    Read More Read More 5 Comments

    25 Microchips That Shook the World 


    ....was the title of an article in the IEEE Spectrum publication. The article had the subtitle: A list of some of the most innovative, intriguing, and inspiring integrated circuits.

    Among the 25 is the Tripath TA2020 which is used in our AMP6 and AMP6-BASIC

    Tripath TA2020

    We are very glad that Tripath is listed in this all-time IC-list. We are also very honored that 41Hz Audio is mentioned in such a context, even if in a subsentence only.

    The IEEE is the number one organization for electronics professionals or in their own words; "The world's leading professional association for the advancement of technology."

    Read all/more on the IEE site

  • Active Forum Threads

    Building AMP6-BASIC
    Forum: Building experiences | Replies: 5
    Last Post: mr-busy Today at 13:53
    How to wire a dual winding or multi-winding transformer
    Forum: Transformers and casings | Replies: 21
    Last Post: col_s Today at 12:17
    (almost) Finished Amp1
    Forum: AMP1 | Replies: 0
    Last Post: Rephlex Today at 11:06
    AMP9 output DC offset voltage
    Forum: AMP9 | Replies: 0
    Last Post: Scratchy Today at 06:00
    An 8kW car-amp.....
    Forum: Misc audio related | Replies: 3
    Last Post: gnome Today at 01:25
    Roskilde DIY - AMP6-B component fried
    Forum: AMP6 and AMP6-BASIC | Replies: 7
    Last Post: Saturnus Yesterday at 16:26
    AMP6-Basic backpack stereo units
    Forum: "Non-HiFi" use; guitar, PA, car amps etc | Replies: 135
    Last Post: alexlangberg Yesterday at 13:58
    Those Chinese fakers do it again!!
    Forum: AMP7 and AMP15 | Replies: 10
    Last Post: V-bro Yesterday at 07:50
    AMP9 - Polyfuse mod
    Forum: AMP9 | Replies: 5
    Last Post: Scratchy Yesterday at 04:31
    Rss!
    Forum: Forum organization | Replies: 0
    Last Post: mark_olson Yesterday at 01:38
    AMP6-B Design check
    Forum: AMP6 and AMP6-BASIC | Replies: 8
    Last Post: mr-busy Jul 27th at 18:48
    1st-Timer starts Amp7 build
    Forum: AMP7 and AMP15 | Replies: 76
    Last Post: Zellski Jul 27th at 15:01
  • Recent Articles

    Project: AMP-4-PS on Pedal Power

    We need permission from pedalpower first, and he might want to write something himself. (this art. should not show up yet!)... read more
    FFF 16-Jun-20 01:00

    Categories:

    AMP4, AMP11 

    Active Dual tone control

    Here's a very simple tone-control circuit. Low and Highs, baxandall config.
    Usually works well.

    The 741... read more
    FFF 28-Jul-10 01:00

    Categories:

    AMP3x  AMP6x  AMP9x 

    Assembly Instructions: PS-Quick-Select

    Beware: these kits are to be used behind/after the transformer.
    Except the PSU1-SS. This SoftStart module goes... read more
    FFF 23-Jul-10 01:00
  • Recent Blog Posts

    kbasaran

    Patrick - The Party Machine

    Here is my 3-way boombox built using an AMP11-LV.

    kbasaran 21-Jul-10
    daneo

    Calculating a Sealed Enclosure Volume Part III: Applying the Proceedure

    As an example of this procedure, these measurements and calculations were performed for two...

    daneo 15-Jul-10
    daneo

    Calculating a Sealed Enclosure Volume Part II: Volume Calculation Equations

    If this relationship holds, the Q values can then be calculated. Mechancial Quality Factor: ...

    daneo 15-Jul-10
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