iQube site now functional HERE
i-Qube
Lightweight, portable, high-efficiency Class D Headphone amplifier
Electrical designed by Bruno Putzeys (Hypex UcD / Grimm Audio) and Guido Tent (TentLabs / Grimm Audio)
-Runs on 4x AAA alkaline or rechargeables
-PC/USB or any 5 to 25V regulated wall adapter chargeable
-Extreme efficiency (90-95%); about 80hrs run time on alkaline; rechargeable: typically 60hrs on 1 charge
-Size: as big as the 80G iPod only a couple of mm thicker!
-Weight: 185 grams!
8-fold output buffer for a (near to) load independent output behaviour
4th order loop for minimum distortion
Fixed, phase-shifted carrier wave, oscillator for de-coupling the common ground behaviour between left and right channel
Ultra Low noise input inverters to prevent the need for output impedance matching
Top A-grade components used:
- Medical graded double layer epoxy using HOFC (High Oxygen Free Copper)
- Optimised board design for optimum signal routing
- Alps potentiometer
- Visay series 036 decoupling capacitors throuhout
- Panasonic stack film capacitors
- Carbon signal resistors
- Lumberg I/O connectors
Fully RoHS compliant
Retro art design, CNC machined aluminium casing
Rubber touch feel painted covers
Technical Specifications
Input impedance:
10k ohm
Voltage gain:
low gain: 2
high gain 7
Frequency response @ 200 mV into a 16 Ohm load:
5 - 50 kHz. (-3 dB)
Maximum output power per channel from 20-20,000Hz:
160 mW_16 ohm
80 mW_32 ohm
12 mW_200 ohm
Output impedance:
<0,1 ohm @ f<5kHz
< 1,5 ohm @ 20kHz
THD at 200mV output (typ) 0.01%:
(max) 0.03%.
Output noise:
10uV (unweighted)
Charge input:
any DC voltage between 5V and 20V, polarity protected
battery charge current: 0,3A
typical charger current consumption @ 5Vdc input: 0,4A
typical charger current consumption @ 20Vdc input: 0,1A
Comes packed in a smooth, semi gloss dark grey/black box. (2nd and 3rd gen iPod type of box) and standard with 4 alkaline and a right-angled, goldplated 8" mini mini
Price: 399 Euro (inc VAT; no VAT outside Europe, price to be determined)
