I believe this photo of an Onkyo receiver is labeled incorrectly.
Instead of the TX-2500mkII, it should be labled TX-4500mkII.
On the 2500, right below the dial, there are 3 leds in a row,
and 3 and 4 buttons respectively between the knobs. On the
4500, there are 7 leds and 4 and 5 buttons between the knobs.
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