| Originally Posted by sugarinthegourd /img/forum/go_quote.gif Seems to be the company as Meizu. |
| Company Name: Meizu Technology Co., Ltd. Address: Meizu Tech Bldg., Technology & Innovation Coast, Tangjia Bay, Zhuhai 519085, Guangdong, China Zhuhai, Guangdong China 519060 |
| Company Name: FiiO Electronic Technology Ltd Address: Jichang Road 1518#, Baiyun District , Guangzhou 510410, Guangdong, China Guangzhou, Guangdong China 510410 |
| Originally Posted by dfkt /img/forum/go_quote.gif As for the RMAA tests, the FiiO performs more or less as well as the other amps in most aspects - but it's got quite a bass boost. Which I find to be a good thing, cause the FiiO's bass sounds better than, say, the software EQ on my Sansa Clip. The FiiO sounds great with some of my bright phones, like the Ultrasone HFI-780 or the q-Jays. Too bad it hisses a lot with most sensitive IEMs. |
| Originally Posted by geob /img/forum/go_quote.gif RE : Hiss in The Fiio E3 The specified signal to noise ratio is greater than 90 dB. To put that in perspective my Onkyo home theater Receiver has a S/N of 100 dB and it's noise is too quiet to hear. Twenty five years of repairing Industrial Instrumentation taught me a few things. 1. First break the amplification chain in half. Take your E3 Amplifier and power it up by plugging your headphones in but with the input cable unplugged. 2. No hiss. The noise is coming from your music source. 3. Hiss Look to your batteries. Rechargeable batteries have a limited number of charge cycles and different types require different charging methods. They may not be charging to full voltage levels. NICAD need to be flattened as they have memory. Lithium based batteries like to be charged at about 80% discharge and have no memory but only last for 300 or so discharge/charge cycles. So replace the battery with a brand new alkaline. Still hissing try another set of headphones. By this stage I doubt very much that you will have any hiss and will have proved that the problem lies with the input signal and all the amplifier is doing is its job of amplifying the input signal which has noise that you were previously not aware of. The next biggest area of problems are always to do with the mechanical components such as switches, plugs and sockets. The least likely area of failure is electronic. When electronics fail they usually fail completely. You won't find a half working diode for example. When I try my E3 with my Sennheiser Headphones and no input signal I can't hear a thing. But I am an old fella and my hearing starts to taper off at 10 to 12,000 Hz. If you want to see how good your hearing and headphones are go to :Equal loudness contours and audiometry - Test your own hearing but be careful as you can produce sound levels which will damage your hearing. Cheers |
| Originally Posted by geob /img/forum/go_quote.gif RE : Spike on Start Up. If your source produces a spike when it starts don't plug the FiiO in until after the source is running. Start your source at its lowest volume setting. It is not for nothing that high end home theater receivers do a soft start by going into standby mode with the speakers disconnected from the output. This is because there is a power surge when the source powers up its power supply. If your source produces a power surge at its output of course an external amplifier will amplify the surge. In the portable situation the amount of energy involved is limited by the power supply which in turn is a reflection of the internal resistance of the batteries. That's why a 1.36 volt rechargeable will operate equipment designed for 1.5 v zinc batteries 
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