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I have heard these copies are crazy good, and they do open up all the registers, but differ slightly in that their sub-tones are not as vociferous. I haven't played either model, so I thought I should bring this difference up now.

bloke wrote:http://www.ebay.com/itm/1985-Hirsbrunne ... 1846213155

Of course the jinbao is much better because they use solid brass valves. What was Peter thinking.