I recently got a couple more BM-600s that I plan to swap the HF roll-off capacitors of. They're definitely noisier than advertised, which I was expecting. There's no way they're 14 dBA in cardioid, because they're significantly louder than my AT4050. So if increasing the corrective EQ doesn't make them significantly quieter (I expect it will, I wouldn't be surprised if it's 14 dBA with the proper capacitance or a properly biased FET, or it could just be the marketing nonsense I think it is), what's a good easily accessible FET to use?
It's gonna be a bit before the mods though, waiting on some 680pF caps (I have WIMA ones coming, and some silver mica ones as well since the WIMAs seemed like a tough fit in my first BM-600, and all the WIMA ones I could find on eBay either came from China or Taiwan, figured Taiwan was a safer bet, the mica ones are coming from Quebec which is the next province over so I expect those quickly).
Something to note in these mics is that while most capacitors in them are film ones, the in circuit EQ ones are ceramic. Is it worth replacing the low end roll off one too? I'd be replacing it with the same capacitance but a higher quality capacitor if I did, because I like the amount of low end in them.
TL;DR They're a bit noisy stock, I'm increasing the HF attenuation capacitance and possibly replacing the FET in both. I'd like FET suggestions.
June 22, 2008, 09:47:56 AM
