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Now, maybe you don't, or shouldn't, grab the ribbon for far-harpsichord, nor the hot condenser for snare-kissing... yet often we do.
...in my post about ribbon volume Merik taught me about matching the ribbon and primary DCR...
Heavy loading will also decrease HF response significantly.
I wonder who came up with the idea that ribbons should be used with low impedance preamps?
@Wavebourn: it would be very hard to measure the naked ribbon and I'm not sure it would help. There's no way to use a ribbon mic without a transformer. Brad once talked about designing transformerless ribbon electronics, but I think it was meant more as a kind of stunt. The ribbon impedance is just too low.
As for loading: I made comparitive measurements with the whole ribbon mic and different loads. Light loading seems to affect LF response mostly, but heavy loading affects HF response quite significantly. By heavy loading I mean that the output impedance is actually greater than the pre's input impedance. But some slight HF loss can also occur with ligher loads. It depends on the mic's inpedance curve. If you have a transformer coupled pre, the actual input impedance may vary as well.
Theoretically, I may expect roll-off on low frequencies because of acoustic short cut, and roll-off on high frequencies because of length of the ribbon.
I used 4 transistors in parallel for dynamic mic preamp. You may use more.Having no measurement results you can argue forever without any success, right?