I had ordered this from Fixup.net (Dr. Xin) about a week ago, and in the mean time, dug out some of my older SRF-39 and SRF-M70 Sony FM headset radios. I also picked up the SRF-M35 on ebay for a couple bucks as Xin's top digital recommendation.
I had thought that the Xin modified SRF-S84 would not cut the mustard during my reslisten to these others and the recommended SRF-M35. Pleased to say I was wrong. The Xin SRF-S84 is truly an amazing little piece of engineering. The sound is leagues ahead of all these following Xin modification, and this is more than an aboslute silent background (no hiss) when connected to a medium or good FM signal. Balanced sound quality centered on midrange -very 'warm'. More bass than needed is available with the 'megabass' switch, which to my total amazement made the included MDR-E806 Sony earbuds sound quite good (they are a large diameter unpadded on-ear bud). These will actually work quite well for many trips where loss and durability are issues (I've been trying buds like this for years, and thrown away dozens).
If I flip off the 'megabass', the included Sony buds loose adquate bass. Pluggin in Sharp's HP-MD33S canalphones, a balanced tight bass is restored (see my simpler reversible dampening modification in DigDubs Sharp MD33 mod thread
http://www6.head-fi.org/forums/showt...ighlight=sharp).
Although Xin indicates the older unmodified digital SRF-M35 radio sounds good, I would say that it does not relative to his shipping SRF-S84. The lack of digital is only a very minor annoyance, and is well worth the drop in size even for less discerning ears.
Good thing I ordered 2 S84 radios. ($59.99 ea). Good show Xin, I don't think readers will be disapointed either.
Sydsfloyd67
[size=xx-small]-Frontier Labs NexII (Nex2-00), Rio Sonic Blue, cMoy-BrnOpa2, KSC35, KSC55, Koss GT-5, Sharp MD332, thePlug, SRDF -S84, 39, M35, M70[/size]