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pendlewitch

 
Member Since: Sep 10, 2011
Location: Nelson,UK
Posts: 1,743
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Mac Specs: iMac 27" Mid 2010, 3.2GHz Intel Core i3,4GB 1333 MHz DDR3, ATI Radeon HD5670 512MB, Yosemite 10.10.1

pendlewitch is offline
From what I can see your stereo system has:-

two pos and neg sprung clip type connections for your front L&R speakers

two RCA jacks for accepting optional rears L&R

one jack (possibly RCA) to connect a subwoofer (which must have it's own integral amp and ac supply).

If you want to make it work cheaply with two additional surrounds I would buy 2 surrounds with the connectors already on rated at 50 w 16 ohm impedance (similar to Aiwa SX-R220) . You can get them on ebay for buttons.

Proprietory 'audiophile' speaker cables normally have + and - markings on them,but you may struggle to identify the polarity on yours....sometimes the pos side is identified by a raised ridge running down on side or if you get the magnifying glass out you may find a small + mark printed on one side.If you can identify the polarity then you have a chance with the methods bobtomay describes.

iMac 27-inch Mid 2010 (wow....that old...eeeks!), WD My Book 1TB Firewire,WD My Passport Air 500GB, Magic Mouse,Magic Trackpad,
iPhone 5C, iPod Nano 4GB 3rd Gen, ATV2.
MOTM October 2012. These days normally happy with an occasional grumble.
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