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Hi,since I tried to gather info and solve my issue on my own and failed, I've been recommended this place by a friend.
I own a Tascam DR-07 mkII and a pair of CS-10EM from Roland. Issue is as follow:
When I use the external microphones, I have to reduce the gain to a very very low level in order to avoid saturation. That only happen with sounds that have some bass in them, such as a door slamming shut, a car ride, or some hardstyle music. Medium and high sounds are taken just fine however. After I have to amplify the sound in audacity or similar to try to even make it usable which fail more often than succeed (i.e: audacity keeps it a 0 db amplification). Now, these mics are electrets microphones, powered by the tascam recorder through plugin-power (definitely not phantom power). I also tried these mics on an old panasonic recorder, they worked fine, no volume or saturation issue. Same result if I plug them on my laptop. So making some research, I found some explanation that could be exactly my issue according to soundman:
I am having bass-range distortions even though I have the right settings (max. 0 dB)!
The energy supplied to the microphone via the T-feed is not sufficient to process the bass tones. Either the A3 adapter must be used, or for very high volumes, the “Rock” version must be selected.
So according to this, I'm starting to think my tascam doesn't send enough voltage through the 3.5mm jack and I should take a look at that A3 adapter. Could anyone provide some insight ? The microphones requires from 2 to 10V, so maybe the tascam is barely sending enough even with plugin-power turned on, contrary to my laptop.
Tascam model:
http://tascam.com/product/dr-07mk2/ (http://tascam.com/product/dr-07mk2/)
Roland CS-10EM:
http://my.roland.com/products/cs-10em/ (http://my.roland.com/products/cs-10em/)
A3 adapter from soundman:
http://www.soundman.de/en/products/a3-adapter-2/ (http://www.soundman.de/en/products/a3-adapter-2/)