Description by the designer

    I developed this design for a small audio firm called Original Audio which had a customer who wanted a design with this driver. This because the customer had bought a large amount of the Scan-speak drivers and wanted to sell them. (The customer sold his whole stock very fast). 
By the way, everybody is free to use this design for your own personal use.

    It uses a 7"Scan-Speak 8542-05 driver and a Vifa Tweeter the D27TG-35-06, in Holland also known as the HT 275D/2 (we use different numbers!). The cabinet is made according to a principle called a terminated line. I know that this is a kind of strange principle to use for such a driver but I had to come up with a reasonable amount of bass (design goal). I have also build this speaker in a bass-reflex box with a net volume of approx. 16 liters. This speaker sounded very analytical in the low freqencies but not as nice as the terminated line, it lacked a bit of natural warmth.

    The terminated line which i called Transient II, has a much warmer and still very analytical bass performance. The mid is up-front but it also gives, together with the high, a lot of spaciousness. Transient performance is good. The tweeter gives a little too much at the end of the spectrum which gives the system, when used with certain electronics, a bit of bright, 'harsh' sound.

 If you have any questions or remarks i will be pleased to reply on them.
Ronald Koot.
E-mail:speakers@ronald.nl