10-May-2015: Measurements for the parallel balanced chipamp posted.
25-Apr-2015: Update about the balanced chipamps initially designed for Kierkegaard. Meanwhile they serve as a platform for other speakers also.
25-Apr-2015: Link added to my summary about analog audio interfaces (German language).
21-Nov-2014: Link added.
12-Nov-2014: Introduction of Interlude (Zwischenspiel), an easy and cost-effective speaker with controlled horizontal directivity.
13-Mar-2014: Platon has been canceled. Read here why.
12-Feb-2014: More about speaker equalization
08-Oct-2013: Kierkegaard vertical measurements and more.
23-Sep-2013: Four way Aristoteles progress with initial measurements.
13-Aug-2013: Kierkegaard update to version 0.31 and new measurements posted.
23-Jul-2013: Summary and Conclusions about Omnipolar Speakers. I consider Demokrit and Demokrit-T done.
21-Jun-2013: Preparing Aristoteles to go four way.
16-May-2013: Differential power amps for Kierkegaard.
28-Apr-2013: First Kierkegaard measurements posted.
30-Mar-2013: The Loudspeaker Disappearing Act.
15-Mar-2013: Addendum to Suggestion of an alternative equalization method for wide dispersion speakers
11-Mar-2013: Further debunked: Equalization for Demokrit and Demokrit-T. It has now become a…
Suggestion of an alternative equalization method for wide dispersion speakers.
26-Feb-2013: Visits: 105 minutes with Linkwitz Lab LX521
24-Feb-2013: Introduction of Kierkegaard, a controlled directivity design with medium directivity.
23-Feb-2013: Demokrit-T tweeter measurements posted.
30-Jan-2013: Final technical data of Sokrates posted.
29-Jan-2013: Alternative EQ method for Demokrit -T tried...and it failed miserably.
07-Jan-2013: Demokrit-T long term EQ update.
30-Dec-2012: Sokrates Phono Amp Measurements posted.
28-Dec-2012: miniDSP 2x8 lab test results.
07-Oct-2012: Sokrates Measurements posted.
23-Sep-2012: Demokrit-T long term EQ verification started.
18-Sep-2012: Demokrit-T update.
11-Sep-2012: Introduction of Demokrit-T, a tweeter based omni derivate of Demokrit.
11-Aug-2012: What is the Optimum Polar Response for a Loudspeaker ?
03-Aug-2012: Link added to a presentation by Douglas Self at the Burning Amp Festival 2011 about active cross-overs.
17-May-2012: An update as to Why I believe that constant directivity is the way to go.
06-Apr-2012: Addendum added to the Demokrit equalization process.
29-Mar-2012: Demokrit equalization explained with some interesting findings !
13-Mar-2012: Sokrates rev. 0.2 up and running.
12-Mar-2012: Demokrit now with Peerless SLS-10 woofers. Update posted.
28-Jan-2012: The final word about Demokrit ?
30-Dec-2011: Over the years this “algorithm” has evolved as a routine how I approach a speaker project that has a certain purpose.
Maybe you find this helpful.
23-Nov-2011: Link to an interesting article mainly about frequency response and dispersion patterns, the parameters of paramount importance in speaker design.
09-Oct-2011: Interim Conclusions about Demokrit posted.
12-Sep-2011: Aristoteles in a new dress (rev. 0.5) including some new measurements.
30-Aug-2011: Vertical FR response measurements for the Demokrit added.
11-Aug-2011: First FR response measurements for the Demokrit added.
04-Aug-2011: Investigations section added to Current Projects.
27-Jul-2011: Preparation measurements for the Demokrit woofer added.
22-Jul-2011: Quick links added to Music.
21-Jul-2011: Preparation measurements for Demokrit posted.
15-Jul-2011: Why am I currently building what I build.
07-Jul-2011: Introduction of Demokrit, a 360° flooder type omni with reflector.
30-Jun-2011: A few more historical details added to About me.
29-Jun-2011: Sokrates update. Schematics of the key components posted.
22-Jun-2011: Aristoteles update. New measurements with interim conclusions posted.
22-Jun-2011: Link added.
12-Jun-2011: Platon update. Comparison of the Aurasound driver with the Peerless 2” FR.
26-May-2011: New categories Music and Visits.
03-Jan-2011: Small Aristoteles update and better descriptions in the measurement section.
25-Aug-2010: Aristoteles project updated and new measurements posted
24-Aug-2010: Small Sokrates update
06-Jun-2010: Aristoteles project updated and some preliminary measurements posted
03-May-2010: Projects updated
31-Mar-2010: Go-live of 6.283 Audio Pages