Here's what Ashdown say about the Tone Pocket:
The minuscule but mighty Tone Pocket is a premium bass headphone amplifier designed for home practice, studio and stage applications.
With a host of practical features including a 3 band EQ(+/- 15db on each band)for effective tone sculpting, line input (to connect to your smart phone or music player). Analog to Digital conversion. Mini USB recording output for direct recording into your favourite DAW plus a balanced line out. Lastly a 9v rechargable battery allows 8 hours playing time between charges.
From the top, the Tone Pocket is the answer to all of your practice/recording interface needs.
The well-equipped rear panel of the Tone Pocket features a USB recording output for use with your favourite DAW, recorded with the truest digital conversion. When active, the USB socket also doubles as a charger for desktop use, keeping the unit charged via USB 5.1v -2.1A.
8 hours of playing Time
The Tone Pocket is powered by a rechargeable 9v battery (which can be changed if required), providing approx. 8 hours playing time.
The unit also comes supplied with its own 10v DC power supply (centre pin negative) for mains charging, as well as a 12v in car power supply for use with a 12v car socket (centre pin positive).
Simple EQ. Bold Tone
The Tone Pocket enhances the sound of your music delivered via your smart phone, offering more power with increased clarity and tone.
The simple yet powerful rotary 3-band EQ controls the Bass, Mids & Highs, offering +/- 15dB on each band. The Tone Pocket ‘s balanced line output (on the rear) of the allows for connection to an amplifier or PA system.