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Rundmaus proudly presents...
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Old 11th August 2014, 06:09 PM   #1
Rundmaus is offline Rundmaus  Germany
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Default Rundmaus proudly presents...

... Helga!!!

Click the image to open in full size.

Helga!!! is a portable Audio system put together in almost no time to provide some music at our campsite at the Mera Luna festival in Hildesheim, Germany...

Helga!!! is based on a set of Heco "Professional 450" 3-way speakers built around 1977, with a 19mm dome tweeter, a 38mm dome midrange driver and a 200mm woofer. For details see:

Professional 450 Speaker-P Heco Hennel + Co., Pulheim, build

I saved them from being scrapped a few years ago, and despite their age they still sound quite impressive, with the frequency response being acceptable even by today's standards:

http://users.atw.hu/speeditor/images/heco-13.jpg

They are really heavy and seem to have some decent built quality. As the outside of the cabinets was somewhat battered already, I completely wrapped the outside in Gaffa tape and added some plastic corners to make them a little more rugged.


Helga!!! is driven by a Sony car amplifier also saved from scrap, surprisingly it consumed only approx. 1A for 2 channels at normal listening volume. Power comes from a DIY powerpack based on 12V/7Ah SLA batteries.

It doesn't always need to be highest-fi to have fun!

Rundmaus
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Old 11th August 2014, 06:34 PM   #2
adason is offline adason  United States
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nice! you would not have the crossover schematics for the speakers by any chance, just curious...
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Old 11th August 2014, 06:54 PM   #3
Rundmaus is offline Rundmaus  Germany
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I'd have to take out the woofers and trace the crossover boards by hand - probably it's easier to find them somewhere on the internet...

Regards,
Andreas
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Old 11th August 2014, 08:27 PM   #4
S4m is offline S4m  Germany
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Hey Rundmaus! Nice stuff for the Mera I’m living nearby Hildesheim and missed this time to go to the festival. Probably forthe not-germans you should explain the name "Helga!!!" or it wouldn't be as funny as it is
Greetings!
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Old 11th August 2014, 08:35 PM   #5
Rundmaus is offline Rundmaus  Germany
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For the non-German readers, maybe this will provide some insight into the 'Helga' culture

Information about \'Helga\' - English Discussions Forum - ringrocker.com

First 'HELGAAA!' screams started right when we entered the campsite and carried the loudspeakers to our tent.
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Old 12th August 2014, 10:53 PM   #6
Rundmaus is offline Rundmaus  Germany
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... and finally, Helga! in its natural habitat:

Click the image to open in full size.

Regards,
Rundmaus
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