Mechanical Robot Man
RIAA (Robotic Intergalactic Astro-Artists) Lyrics
We have lyrics for these tracks by RIAA (Robotic Intergalactic Astro-Artists):
Lift Off Ignition sequence start Engines on 5, 4, 3, 2, 1 All engines…
Put Your Miniskirt On Put your hand in the hand of the man Who stilled…
The lyrics are frequently found in the comments by searching or by filtering for lyric videos
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Qorax
As you said, the grooves that represent low frequencies need to be way bigger on high amplitudes.
Especially for very fine styli profiles with a small radius like Shibata, microline and fineline it is an issue.
Without the equalization, the grooves would become too wide for those styli to make proper contact with the sides of the grooves.
It is also the reason that some records from the early 50s (that have nearly zero equalization) sound better with larger profile styli like conical or spherical, even while they are the same microgroove type.
RIAA filter accuracy is also very important for accurate sound reproduction. It is often underestimated and people mostly buy phono preamps based on the amplification performance and noise/dynamic range of the device itself. If they they even consider investing in it; I think phono preamps are one of the most overlooked upgrade.
Passive RIAA equalization is often considered better when good components are used in a good design. With cheaper components active RIAA equalization is often better.
When well implemented, passive RIAA equalization has better accuracy on higher frequencies, no instability at certain specific frequencies and feedback within the filter itself is impossible.
The bad thing passive filtering can be impedance issues, because the impedance of the filter varies greatly per frequency, so the amplification circuit has to be able to deal with that. Similar to the issues some power amplifiers have with driving electrostatic speakers.
Active filters have a feedback loop where the signal is amplified at the desired frequencies, so instead of making high frequencies relatively less loud, the bass gets amplified to make it louder.
This makes phono preamps with active RIAA equalization more power efficient; about 20dB less amplification is needed to achieve the same output level as with a passive RIAA filter.
ANA[DIA]LOG
I forgot to highlight also a 4th point: the RIAA equalization also greatly helped the TRACKING issues connected to the large low frequencies grooves, as well as avoiding also the DETERIORATION of those grooves.
John sweda
Yes I was going to say about that but you said it now!
Who makes that equalisation box, and how do you find it?
ANA[DIA]LOG
You mean the drawing I showed during the video?
John sweda
@ANA[DIA]LOG no drawing I don't know what you mean no the comment you made that the needle can skip in the bass tones.
Who makes the the equalisation curve box you had behind you, I wanted to know ! and how do you find it does it work well or colour the sound is it a massive improvement?
ANA[DIA]LOG
@John sweda Now I understand! Its the Re-equalizaer by Rek-o-kut (esoteric sound). I got it several years ago for teh correct equalization of my 78rpm records and showed it in that video: https://youtu.be/_aybfww2nIg
They still make it and now it is improved with also a lateral/vertical switch: https://www.esotericsound.com/elect.htm
It is obviously a signal break and NOT passive so a little coloration is the toll to pay to have a correct eq. Obviously I do not know if things are better in teh 3rd edition out now.
Matty Bruno Lucas Zenere Salas
What is LP?
Saint Michael
I always wanted to know about RIAA curve. You've explained to nerds like me. I always wondered why a collection of songs from various years on the same album (say 1950 to1955) sounded so different.
ANA[DIA]LOG
It's an amazing trick that most people don't know of!
Saint Michael
@ANA[DIA]LOG ☺
Qorax
As you said, the grooves that represent low frequencies need to be way bigger on high amplitudes.
Especially for very fine styli profiles with a small radius like Shibata, microline and fineline it is an issue.
Without the equalization, the grooves would become too wide for those styli to make proper contact with the sides of the grooves.
It is also the reason that some records from the early 50s (that have nearly zero equalization) sound better with larger profile styli like conical or spherical, even while they are the same microgroove type.
RIAA filter accuracy is also very important for accurate sound reproduction. It is often underestimated and people mostly buy phono preamps based on the amplification performance and noise/dynamic range of the device itself. If they they even consider investing in it; I think phono preamps are one of the most overlooked upgrade.
Passive RIAA equalization is often considered better when good components are used in a good design. With cheaper components active RIAA equalization is often better.
When well implemented, passive RIAA equalization has better accuracy on higher frequencies, no instability at certain specific frequencies and feedback within the filter itself is impossible.
The bad thing passive filtering can be impedance issues, because the impedance of the filter varies greatly per frequency, so the amplification circuit has to be able to deal with that. Similar to the issues some power amplifiers have with driving electrostatic speakers.
Active filters have a feedback loop where the signal is amplified at the desired frequencies, so instead of making high frequencies relatively less loud, the bass gets amplified to make it louder.
This makes phono preamps with active RIAA equalization more power efficient; about 20dB less amplification is needed to achieve the same output level as with a passive RIAA filter.