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DIY Night

8pm Wednesday 13th December, visitors welcome.

Willis Room, City of Whitehorse Offices
Maroondah Highway (Whitehorse Road), Nunawading
Melway Map 48 Ref G9
Contact: 9437 1249


It's that time of year again when the DIY group get to show off their Hi Fi projects at the December General Meeting. It looks like another busy year for the group as they have managed to put together three systems for the night's presentation.


This year we are lucky to have a wide range of equipment on show, everything from vinyl to a music server, and both Class-D and Valve amplification. The Audio Action group will be demonstrating their finished project, a Phono Preamp designed and built by a team of MAC members.


The first system will be playing music from a DIY "Raspberry Pi" music server. Based on a low cost but very powerful computer board aimed at the educational department. This same system will feature a 250W Class D amplifier powering a pair of 2-way stand mount speakers.


The second system will showcase the MAC Phono Preamp, designed with two 'best in class' head-stage amplifiers, one for MC and one for MM cartridges. The rest of the system will have an opamp based preamp running into another Class-D power amp. A pair of 3-way speakers with American 12" bass drivers, Scandinavian 5"mid's and 'Raal' ribbon tweeters, will be providing the sound for the night.


The final system will feature a valve amplifier with a modest 15 Watts. The design is a hybrid of Dynaudio ST70 and Alan Wright's ideas using EL34's in ultra-linear mode. The amp will be partnered with equipment from the other two systems.


As in previous years, each system will be allotted 30 minutes. Each presenter will get to explain their gear as well as play some music. This should see us finish the session by 10:00pm, allowing the members on the night to hear all the systems. Its going to be a cracker of a night.




Nick Karayanis

Program Co-ordinator


Ken Tripp
Wise and Wonderful Webmaster
Melbourne Audio Club, Inc.


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