new DIY Britain Group A vinyl phonograph mm phono stage
Input impedance 47K
Magnification 100 times
Supply voltage AC 18V
Vinyl primary user set the player to the phono ground wire to ground terminal, can completely eliminate the hum noise
Singing put unused antique elements, carefully selected modern fever materials to ensure excellent sound quality, listening to a sense of natural flow.
The following DIY can reference.
Vinyl turntable amplifier system which is a very important aspect.
Mouth to sing a good place to take the NAIM NAIT2 machine, originally have complex rigid child, a direct move out to become.
This release is designed to sing, a little different from the conventional design, single-ended Class A is just one reason for good sound.
General phono using negative feedback, treble and bass curve are adjusted by feedback network. Vinyl records in order to obtain a high signal to noise ratio and a high frequency pre-lift and then burn it to vinyl, so the depth of the negative feedback phono designed to reduce the high-frequency signal amplification to obtain a flat frequency signal output, but also the background Noise was pressed to obtain a high signal to noise ratio. Therefore, the high-frequency negative feedback is very deep. While we all understand the negative feedback the distortion improvement is very beneficial, but too much negative feedback considerable adverse impact on the sense of hearing, which is the consensus.
As a front-end equipment, the use of influence on the signal processing method is great, especially the high-frequency depth feedback, so that sounds not so easy and natural.
However, NAIM get way RIAA phono section, with conventional designs, it is designed to effectively avoid this situation. First, put the first stage will sing NAIM weak pickup put about twice that level although there are negative feedback, but this level of open loop magnification small, so feedback is very shallow, feedback drawback is negligible, Following the adoption of a low-pass network, to the high-frequency attenuation, and here is the key! We do not doubt NAIM sound designers to grasp attenuation slope! In fact, the high-frequency signal as this process is indeed in line with standards of the RIAA curve. Attenuation of the signal directly to the second stage, is straight, followed by an amplifier task just the low-frequency curve adjustment. Avoid the high-frequency signal the depth of negative feedback! Thus, the low-pass network and the combined effect of low curve adjustment networks, the final output is in line with standard RIAA curve of the audio signal. This design, let the music sound sounds very stable, resistant to listen, listen to sense the difference between conventional phono obvious opened.
Why such a design, let the music sound sounds very stable, resistant to listen? Fever circle generally have attenuated than the feedback phono sound nice rumors, the principle is actually up analysis mode attenuation ratio feedback mode transient response good reason. The NAIM phono design ideas, the use of feedback and low frequency attenuation formula of two ways, both to ensure the requirements for low distortion, but also take into account the good high frequency transient response. The phono design, first from the design line, the sound quality will provide a strong foundation guarantee.
The overall tone analog phono strong taste, with operational amplifier sound completely different, vinyl Shaoyou favorites: “single-ended, Class A, attenuated RIAA!”
Packing included:
1PCS DIY Britain Group A vinyl phonograph mm phono stage
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