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Nand, (and anyone else interested)...
Preamp Amplification Level Test Results:
(Recorded a quiet sine wave signal from my laptop on line-in and 5 ext. mic volume settings)
Line-in (ie no preamp): -41dB
Gain 0: -30.5 dB
Gain 5: -23 dB
Gain 10: -15.5 dB
Gain 15: -8 dB
Gain 20: -0.2 dB
So it seems the deck can apply about 40db of amplification to a signal, though it gets fairly noisy up at the high ends - How much hiss you would get would all depend on your mic's signal-to-noise ratio.
So with 40dBs of amplification, and the DS70 is still pretty quiet eh? That is one insensitive mic.
I'd say go for the external preamp, which will probably be cleaner (giving better results if you need to amplify via software post-recording), and has the bonus of the 9V power, but maybe consider the combo Church Audio mics and preamp set...
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