AOS Studio 24

The AOS Studio 24 BE (S24) is a closed box MTM loudspeaker (Photo 1). The S24 is sold as a kit by Axel Oberhage Starnberg (AOS) in Germany. The original AOS design is a “bookshelf” format box. However, free-standing operation of the S24 on a stand is acoustically better than stowing it away in a bookshelf. The S24 uses high-quality driver units made by ScanSpeak.


Photo 1: My AOS Studio 24 BE, which I re-desinged as a full-blown floor-standing loudspeaker

A unique feature of the S24 is that the woofers protrude by 18 mm from the front baffle, whereas the tweeter sits flush with the baffle. Most speaker designs lack this offset, which, due to the recessed woofer cone(s), causes a lag of the sound wave(s) emitted by the woofers relative to that of the tweeter. The additional offset used in the S24 therefore avoids the typical misalignment of the different drivers and therefore allows time-coherent sound emission from the woofers and the tweeter.


Photo 2: Close up of the tweeter and the midwoofers, which are mounted on aluminum rings to achieve an offset relative to the front baffle

I decided to modify the original AOS design a little when I built my S24. In particular, I used a full-height floor-standing enclosure for the S24, revised the crossover filters a bit, and added an active subwoofer. A detailed description of my tests, modifications, and extensions to the S24 are available as a separate PDF document.

8 thoughts on “AOS Studio 24

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  3. Daniel wrote on 06. August 2014:

    Hallo Matthias,
    ich bin stiller Bewunderer deiner S24. Wie schön die sind! Darf ich fragen ob Du die MPX Front selber hergestellt hast und wenn ja, ob es gewisse Kniffe gibt, von vornherein eine sehr ebene Fläche zu erhalten und so makellose Fräsungen herzustellen auf den empfindlichen Stirnseiten?
    Der Korpus ist dann auch einfache Birke MPX in weiß gebeitzt?

    Danke und beste Grüße!


  4. matthias wrote on 07. August 2014:

    Lieber Daniel

    Danke für die netten Worte! Die Gehäuse wurden vom Schreiner hergestellt. Er hat die Fronten aus zusammengeklebten Multiplex-Stücken gebaut. Es gibt allerdings auf fertige Platten in der Art, ich kann aber den Link dazu gerade nicht finden. Wenn du interessiert bist, kann ich nochmal genauer suchen.
    Der Rest der Gehäuse ist aus Multiplex, hell geseift. Aber helle Beize sieht ähnlich aus.

  5. matthias wrote on 15. August 2014:
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  7. Pingback: Peerless Subwoofer (active) | HiFi-Bau Brennwald

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