|Tình trạng:||Liên hệ|
|Bảo hành:||12 tháng|
+ A representative preamplifier equipped with NFB type equalizer is the MARANTZ Model: 7.
+ This is a 3-step amplification NF equalizer based on 12AX7, which applies NFB from the 3rd stage cathode to the 1st stage cathode.(so-called "K-K type").
+ The advantage of the NFB type is that it does not require a high gain level and is not very sensitive to tube quality.
+ The NFB type is usually used as it is an easier way to attain a good signal-to-noise ratio.
+ CR type equalization requires a high gain level and is much more sensitive to tube quality.
+ Since tube quality will be directly amplified, the finest possible quality tubes are needed for this type of equalizer. Moreover, proper implementation is more difficult.