Graham Slee Voyager Portable Headphone Amplifier 

The Voyager portable headphone amplifier is the ideal partner for your portable music devices whos headphone outputs are often limited in performance because battery power is being used for their other functions.

The pocket sized Voyager portable headphone amplifiermakes music on the move a whole new experience — capable of projecting an airy musical outside-your-head performance using good headphones, and with a source that's capable of it.

Use it with your iPod, Walkman, MP3 player or any other mobile device having an analogue output - line out or even its headphone socket - and hear the improvement.

The Voyager portable headphone amplifier can even make cheap headphones sound good: its contour switch compensates for the limited tonal range of lightweight street-wear headphones making them sound like real hi-fi headphones. From the moment of your first listen you will never want to travel without it.

Running on a single 9 volt "E-cell", the Voyager portable headphone amplifier drives high impedance headphones as easily as low impedance ones. It has a long battery life: usually lasting a month of average usage at good volume levels - and on occasion 3 months! This is because it uses a low loss battery polarity-protection system leaving more power for your music. When at home or at work it can borrow power from your computer USB port or be powered from its mains adapter (supplied). Laptop users on the move can also make use of the USB power facility, thus preserving battery power. Rechargeable 9 volt batteries charged on a separate charger may also be used.

The Voyager portable headphone amplifier uses noiseless DC to DC conversion to increase the 5 volt USB voltage to 9 volts ensuring no loss of level when powered from USB.

Specifications

- Dimensions: L. 12.5 W. 6.7 H. 2.8 (cm)

- Weight: 180 grams approx. (700 grams with plug top PSU)

- Battery life: 50 hours continuous play, 2-3 weeks average usage

- Output: 12mW rms into 32 Ohms, 10mW rms into 600 Ohms

- Frequency Response: Flat: 13Hz to 34.5 kHz (-1dB), 5.5Hz to 69 kHz (-3dB)

- Contour: +9dB at 45Hz and 20 kHz, Turnover +3dB at 260Hz and 2.85 kHz

- Channel Balance: 0.5dB

- Hum & Noise: -94dB CCIR Q-pk 20Hz-20kHz, better than -100dB "A" curve weighted

- Stereo Crosstalk: -52dB

- Distortion (THD+Noise): at 80Hz: 0.03%, at 1 kHz: 0.03%, at 5.6 kHz: 0.05%, at 16 kHz: 0.13%

- Power sources: [1] Battery, 9V (MN1604; 6LR61), [2] USB via "mini-B" 5VDC (with internal 9VDC analogue voltage conversion), [3] Mains adapter, 12-18V AC or DC unregulated (internal rectifier for AC use) (Polarity protection on all)