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Specifications for the U86 XT / U168 XT power supply
The power supply needs to be regulated and provide 12V DC with at least 3A. The outside (sleeve) of the connector is -, while the inside (tip) is +. The connector diameter is 5.5mm (= 2.2in).
Such a power supply is a standard part that can be purchased via most music or electronic retailers and mail order companies. If you are unsure, print out this page and show it at your local shop or contact the local ESI distributor in your country.
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