For driving hard to drive headphones is has worth has adding a amp to any other Dap, but if the amp of the 1zm2 is enough to drive what you have i think is not worth.Is it worth it to add an external amp to the wm1zm2 to drive some harder to drive headphones and iem?
will sound diferent from the sony house sound (wich i love)because nrs dont say much , are just nrs , and who thinks that that the amp on Sony is weak, sure never heard it, on paper they are weak, listening , the sound has density low distortion, great bass slam ,very lush and musical, in resume if you dont have very hard to drive headphones , save your money
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