"Compact unit gives pretty good results."3.0 starson by vonnieglen
Pros: Small and has adjustable gain.
Cons: Signal not quite hot enough for my Ripflash DX. No On/Off switch. 1.5v is not optimal for powering small electret mics.
Summary: I've only had this for ablout a month. I purchased it new through Ebay for $30 with shipping. It is small and gives pretty good results.
I posted four files on the Yahoo Pogo MP3 group http://groups.yahoo.com/group/PogoMp3/
for comparison between the internal mics on both my Pogo Ripflash DX and my Iaudio U2. Forgive the source material please!
I purchased some panasonic WM-61B102B mic cartridges from digikey for $1.85 a piece. I found a cable that had an 1/8" stereo jack going into two rca plugs. I cut off the two rca plugs and soldered the mics to the wires. When I plug these into the preamp the sound quality seems much better to me than the mic that came with it.
I am thinking of trying the archos preamp out with 3v to see if that might give better results. That should give the mic cartridges better dynamic range and I am hoping it will give me a hotter signal for my ripflash DX. I will be posting my results on the yahoo pogo group noted above.