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Based on Marantz M7 pre-amplifier circuit. 1 × Tube preamp kit (including tube). The primary is two sets of 110v, the series connection is 220V, and the parallel connection is 110V. Note: This is a DIY Kit, you need to solder assemble it yourself.No technical support available.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.