What Haworth Guitars say:
The VOX AMPH-AC AC30 Amphones are an awesome AmPlug Guitar Amp with headphones by VOX.
At Haworth Guitars we love this VOX AMPH-AC AC30 Amphones's quality Audio Technica headphone design and the crisp sounding AC30 AmPlug technology which lets you play anywhere, anytime.
The VOX amPlug Series of palm-sized headphone guitar amplifiers enables musicians to easily plug their amPlug into any guitar, and attach a pair of headphones to achieve high quality guitar sounds anywhere. Now, amPhones make it even easier for you. While the amPlug required the user to provide the headphones, the amPhones are headphones that have the amPlug technology already built in! Just plug in your instrument, and enjoy serious guitar/bass sound and superb comfort. amPhones are created using headphone technology from Audio-Technica, the name you trust for headphones. amPhones can also be used as conventional headphones when the amplifier simulator is switched off. You can connect your guitar/bass to these headphones, or use them for listening to music. amPhones are what you need, whether you're practicing by yourself in your room, or listening to your portable audio player on the way to the studio. amPhones are a must-have item for any VOX enthusiast.
VOX amPhones Specifications < Headphones section > Type: Closed-air dynamic headphones Driver diameter: 40 mm Output sound pressure level: 97 dB Playback frequency range: 20 Hz – 20,000 Hz Maximum input: 1,000 mV Impedance: 49 Ohm Cable length: 1.3 m < Amp section > Output: 1.4 V (Maximum) Controls: Dials (Gain, Tone, Volume, Effect), Switch (Standby) Input Terminals: *Guitar Input (for “amPhones AC30 / amPhones Lead / amPhones Twin”) *Bass Input (for “amPhones Bass”) *AUX Input Power supply: AAA battery x 2 Battery life: *amPhones AC30, *amPhones Lead, *amPhones Twin Approximately: 7 hours (Manganese) / 16 hours (Alkaline) *amPhones Bass Approximately: 8 hours (Manganese) / 20 hours (Alkaline) < General section > Dimensions (W x D x H): 195x 160 x 50 mm / 7.68" x 6.30" x 1.97" Weight: 230 g / 8.11 oz. (Not Batteries included) Included items: AAA battery x 2 for trying product, plug adapter (3.5mm 6.3 mm) *Specifications and appearance are subject to change without notice for improvement. **Audio-Technica is registered trademarks of Audio-Technica Corporation.