Originally Posted by Selden Ball
There are plenty of people who like to purchase units which are essentially upgraded versions of another company's lineup. In addition to aftermarket products (where the equipment is modified by a 3rd party), there are product lines like Onkyo/Integra and Denon/Marantz.
My guess is that Sherbourn needs to increase their sales. Since their brand name isn't a particularly well-known one, they need more sales channels to improve their visibility and improve their profitability.
In those cases though, the upper tier line is much closer in price to the lower. Sherbourn prices are over double, at least with the PA-500 vs the XPA-5. Same Transformer, same rear panel, same output.