I finally found some time to finish another project. I had the chance to get the MAOP version of the Markaudio Alpair 10 speakers (Thanks Mark). The MAOP version of the Alpair 10 speakers have a modified cone compaired to the original version of the Alpair 10. You can find more information on this on diyaudio.com Alpair MAOP and a datasheet in the pictures below.
As an amplifier I used the Hifimediy T2 again. The only modifications to this amp is an alps “blue velvet” volume pot. The amplifier is powered by a Meanwell NES 350W power supply. Since the amp got a little bit to hot for my taste in my last box, I have mounted a silent fan on the backplate for the connectors. A selector switch for the input sources has also been added. Wireless music over Airplay is realized with an built-in Apple AirPort Express. There is a charging function for USB devices as well.
Amplifier and chassis have played for about 50 hours until today. So I can’t have any final words on sound quality yet. So far I am very pleased.
As a template for the speaker itself, I oriented myself on the construction plan of Erich Hartmann (Erich’s Hartmann’s bookshelf box). The placement of the chassis are not as ideal as in Erich’s plan since they are not fully centered. The vents are on the backside, as opposed to Erich’s plan. The box is seperated into three chambers. Each speaker chambers is about 14.5 litres and the walls are damped with acoustic foam. In contrast to my previous boxes this box has a curved front. In this way I hope for a better angle of dispersion for stereo sound. The veneer used on this box is bubinga rosewood which looks a little bit like red wine.
I hope you can enjoy the following pictures. I would appreciate questions and suggestions for furture builds.
Sorry for the bad video quality: