A tonearm that can do "Signals Reproduction 100%"?

This tonearm's flyer (from years ago) showed some interesting data and pretty tall claims, such as "Signals Reproduction 100%", "Dynamic Improvement 5dB" and "fluid damping...eliminates all vibrations including rumble during playing".

Another case of cartridge spec not agreeing with actual product

（中文在後）Another case where the spec does not agree with the actual product. When the top of the cartridge is near level, the cantilever is close to 30 degrees, quite far from 23. Though given the angle between the contact line and cantilever is close to 120 rather than the more common 110 degrees, the SRA still ends up just slightly higher than 90.

又一個規格與實際不符的情況。當唱頭上緣接近水平時，針桿角度約30度，遠高於23。但還好它的線／桿夾角在120度左右，所以此時SRA只比90度高一些。

Turning off sub-sonic filter when measuring cartridge-arm resonance

（中文在後）
Some USB sound boxes/cards, preamps, and phono stages have subsonic filters to suppress ultra low frequency noise from playing record warps, etc. When measuring the natural resonance of a cartridge-tonearm combo, be sure to turn the feature off, otherwise one may get incorrect readings. Figure 1 is with the filter turned ON in the ART USB Phono Plus while Figure 2 is OFF and shows better results.

有些USB音效盒，前級與唱放有超低頻衰減功能，播放不平的唱片時可保護喇叭或其它器材。但在測量低頻共振點時（Adjust+ 裡的 f res功能），要將這功能關閉，才不會影響結果。圖1是ART音效盒的濾波ON，圖2是OFF。後者明顯得到比較符合預期的結果。