SOLD. I have my SR-71 portable headpone amp for sale. Lovely warm sound and enough power for almost any headphones. Runs off 2 x 9V batteries (I will include 4 x Duracell Industrial 9V's with the sale). Also comes with a soft carry pouch. Functions perfectly, a couple of cosmetic marks but has been used very sparingly over the years and well looked after. Retail price was $395. My price includes shipping anywhere and Paypal fee. Ships from the UK.