Heloo,i want to ask right now i use fostex 208 sigma and fostex T900 and R100T i must use cap again or not for T900A?
Thanks.
Thanks.
I don't know about 'again', but yes, if only to avoid destroying the T900a; if you put LF frequencies through that unit you're likely to blow it, either through over-excursion and / or frying the voice coil.
I thought I didn't need to use the cap anymore, because in the attanator, there is already have transformer inside.so i must use cap again,how much value the cap i must use?
The R100T only attenuates volume. It still allows all frequencies to pass through, and even at relatively low levels, if you hit that tweeter with a low frequency note, especially in recordings with a large dynamic range, you are likely to kill it (lots of power down there). Distortion will also be very high with it run sans any high pass filtering at all. Tweeters must have some protection.
There is no one answer to capacitor value; that's a 1st order high pass filter & whereabouts you put it (component value) depends on exactly what it is you are doing. As I recall, Fostex themselves suggest a 1uF cap with the combination of the 208 & the T900a, so that would seem a logical starting point. If you wish to experiment, which this sort of thing tends to rely on rather than regular measurements per se, then I would advise getting a handful of cheap MKP caps in a range of values; say 1uF, 1.5uF, 2.2uF 2.7uF, 3.3uF & see which works best for you. If you then feel the urge to replace it with an expensive cap, e.g. a film & foil or paper in oil type, you'll know what value you're happy with.
There is no one answer to capacitor value; that's a 1st order high pass filter & whereabouts you put it (component value) depends on exactly what it is you are doing. As I recall, Fostex themselves suggest a 1uF cap with the combination of the 208 & the T900a, so that would seem a logical starting point. If you wish to experiment, which this sort of thing tends to rely on rather than regular measurements per se, then I would advise getting a handful of cheap MKP caps in a range of values; say 1uF, 1.5uF, 2.2uF 2.7uF, 3.3uF & see which works best for you. If you then feel the urge to replace it with an expensive cap, e.g. a film & foil or paper in oil type, you'll know what value you're happy with.
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