Using MXL 990 (LDC) into XLR on Fostex MR8HD. Switch set to MIC/LINE. Phantom power is on. To get any sound registering I have to turn up the gain, channel fader and master fader almost all the way - and still it is rather faint. Is there just very little gain or do I have a problem with the Fostex? Is the XLR input really a line-in to be used with a Mic Preamp (e.g. DMP3)?