Does anyone know if the Headroom Portable Desktop Amp is center pin negative or positive?

According to the internets. 

Another version of the same has a line to the Center as positive. 

On Ebay - some one is selling one with this wall wart power supply

Looking it up on Mouser - it is indeed - Center Positive. 

(unless he is selling it with a supply that would make it not work)

But I think it is safe to say - Center +

7 hours ago, mikeymad said:

According to the internets. 

Another version of the same has a line to the Center as positive. 

On Ebay - some one is selling one with this wall wart power supply

Looking it up on Mouser - it is indeed - Center Positive. 

(unless he is selling it with a supply that would make it not work)

But I think it is safe to say - Center +

Huge thanks!

YGPM

In case you need to replace the onboard battery.