Bride of Frankenstein (1935) - The Doctor's Model Mansion
Aurora Frankenstein Model Kit - YouTube
The .01 uf CuTF can only be heard "at its best" with a non-feedback amplifier, which will usually be a single-ended-triode (SET) model (such as the Frankenstein and hundreds of others as well). Besides its inherently outstanding performance, the .01 CuTF offers these extra sonic advantages, over even a direct-connection, when it's "at its best" (as promised above);
1. The .01 will roll-off the lower bass frequencies, which means the amplifier will then waste less of its power reserves, thus providing more dynamic headroom, separation and control, plus less distortion on peaks.
2. The amplifier will also have less intermodulation distortion (which is highly irritating), because there will now be less bass energy to modulate the higher frequencies.
3. Even the speaker drivers themselves will produce less distortion, independently of the above, because they, in turn, will no longer be hopelessly attempting to reproduce the lower bass frequencies. (Needless to say, only "SET-Friendly" speakers qualify in this situation, but that is an obvious given.)
FrankenPaper Monster Paper Models
The Dragon II was an improvement on the original model (no surprise). However, bi-amping was proved, once again, to be the only method to fully maximize all the capabilities of the Pure Reference Extreme. No one amplifier, at any price, could equal the combined performance of the Frankenstein and Dragon, due to inherent and unavoidable technical factors. In other words, any amplifier driving the midrange/highs will be noticeably compromised if it is also simultaneously driving the bass (woofers), and you do not have to be an experienced audiophile to observe the obvious sonic degradations. Ergo, everything else being equal, which is the only fair method of comparison, a speaker that is bi-amped will always be superior to a speaker that is not bi-amped. That, though, is only half the equation. The CuTF .01 uf is the second half of the equation...
16 to kick off our 60th anniversary season
So how do most amplifiers rate on PDC, and what about SET amplifiers, and the Frankenstein in particular? Most amplifiers, push-pull, either tube or transistor, are "at their best" with the majority of either new or used speakers. Even older, lower powered amplifiers, like the famous NAD 3020, will have a PDC of (around) 75. More powerful modern amplifiers, like a typical (100 watt per channel) Musical Fidelity, will have a PDC of 90, or even more. (These PDR numbers are for normal requirements. It's obvious that a huge room, and/or a prediliction for extra loud volume levels, will change/lower these numbers for some audiophiles.)