Firstly most of reviews on here are about using this product with headphone's which are fine and what it is designed for, one day I may get some and use as intended ;).
My mission was to improve the volume output from my Samsung Galaxy Player 4.2 which although a fine product severely lacks the ability to drive my Portable Logitech Rechargeable Speaker S715i. The problem is not due to volume capping on the player it's more to do with an impedance mismatch between the player and the speaker. In my job I drive a fork truck around a noisy warehouse and good sound is needed to keep me happy during my shift and keep me sane.
My portable sound set up :-Samsung Galaxy S 8GB Wi-Fi MP3 Player with 4.2 inch Display - WhiteLogitech Rechargeable Speaker S715i for iPod and iPhone
I first tried the E05 which works quite well and overcomes the impedance mismatch between the devices but was not giving enough volume to my liking although was fine at home with the player and speaker combo.
I received the E11 yesterday 19/6/2013 and eagerly charged it up ready to test out .... it came in nice tobacco sized tin with all accessories included and instructions.
I took the E11 to work and all I can say is WOW ! , in my noisy warehouse the volume is amazingly good compared to the E05 (50% Louder) and much more important was the sound quality this device delivers. I found that compared to the E05 the clarity of the bass was much richer and deeper sounding and there is enough treble to keep anyone happy.
The other main reason I bought the E11 was the replaceable battery option as this is a must in my situation as I intended to use the E11 for an 8 hour working shift, first shift finished and there is still charge in the battery but I will see how this goes and update this review later.
Overall I am very impressed and the E11 has won me over and thanks to all who have reviewed this product before me who helped push me to buy this unit. Get one if your reading this as you wont be disappointed !!