R7000 - best wireless performance/range

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lukass2000
R7000 - best wireless performance/range
Hello,
after 10 years my WRT54G was replaced by a Netgear R7000.
 
Unfortunately I had to realize that the wireless range of the R7000 with the original firmware (does only use 2.4GHz) does not reach the wrt54g :(
So my question is, has anyone experience, there are any differences or which alternative firmware has the best wireless range with 2.4GHz and the R7000?
 
THANKS :)