One, called the Digital Antidote Plus® is claimed to "re-equalise harsh, "ringing" digital sources which causes listening fatigue". The iTube contains two additional switchable circuits. That's a pretty versatile piece of kit but there's more! In buffer mode the input impedance is 1 M ohm, and in preamp mode 100K, both high enough to ensure that there is never an impedance mismatch with whatever is plugged into it. You choose how it acts by setting DIP switches on the underside of the case. If you require the gain of a preamp, the iTube can be configured to give gain but if you don't need any then it will also function as a buffer, ie zero gain. It's more than a simple pre amplifier or buffer, although it will perform that function very well using a ( General Electric 5670 based) valve circuit almost miraculously hidden inside it's small case. IFi liken the iTube to a Swiss Army pen knife, ie a collection of tools in a small package, and that's a good analogy. ![]() With very little space on the these end panels, the power input socket is moved to a side panel, with the power supplied from a wallwart PSU. On the rear panel are two pairs of RCA (phono) sockets for analogue input and output. On the front panel is a volume control knob and two switches. ![]() It's dimensions are (H x W x D): 28mm x 68mm x 158mm). I'll start with the iTube that came to me in the same very classy packaging as the iDAC had, and looks very similar to its stable mate. In this review I'll take a look at the iTube, a valve pre amp that is so much more than just another amplification stage, and the Gemini D-H, iFi's replacement for a standard USB cable. It turns out that the iDAC is just part of a range of products that look very similar, and are designed to work together. ![]() IFi iTube Pandora's box of hi-fi tricks? Ī little while back I reviewed a remarkable USB DAC from iFi, remarkable in that it was such a step forward in sound quality from previous USB DACs.
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