I hate to disagree with a fellow GON member, however I had very different results upgrading to the spyder puck compared to the stock puck on my EMC i-UP. More details, tighter deeper bass, a bigger sound stage, so I thought it was worth the money in my system.
I added the puck but was very hesitant due in large part to Tvad's posted experiences.
At the time I was in a jam because the spindle on the player was broken and the importer told me the best option was the puck replacement. So I buckled and paid up.
My experiences were in line with Teajay's. It really opened up the already great soundstage and tightened the bass a bit.
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