◦ TUBES ◦
◦ NOS [New Old Stock] vs. NST [New Style Tube] Follow our Friend Ecc83 via Youtube ◦
WHAT DOES AUDIO TUBES DO?
Some Preamps allow you to swap Valve tube also referred to as Vacuum Tubes. If we had a way to describe Analog Vacuum Tubes it would be “Holographic & Colored”. Audio analog vacuum tubes, commonly referred to as tubes or valves, have been a foundational component in audio technology for decades. These electronic devices use thermionic emission principles, where a heated cathode emits electrons, creating a flow of current between electrodes. In the context of audio applications, vacuum tubes are frequently employed in amplifiers and preamplifiers.
One of the distinctive characteristics of tube-based audio systems is their warm and harmonically rich sound signature. Vacuum tubes are known for introducing even-order harmonic distortion, contributing to a pleasing and often sought-after vintage tonality. Audiophiles and musicians appreciate the unique coloration that tubes bring to the audio signal, creating a sense of depth and dimension.
Despite advancements in solid-state technology, many audio enthusiasts still prefer vacuum tubes for their sonic qualities. Tubes can add a certain “musicality” to the audio that some find lacking in solid-state counterparts. However, it’s essential to acknowledge that tubes also come with practical considerations, such as higher power consumption, heat generation, and a finite lifespan for the vacuum tube itself. The most popular type of tubes found in many audio devices is the “12ax7” style of tube. Each style of 12ax7 tube comes with a different name depending on how much “level gain” they allow to signal pass through.
Popular Examples of the “12AX7” [9-pin miniature style tubes] Include:
12AX7 (ECC83): A dual triode tube commonly used in preamplifiers and as a voltage amplifier in guitar amplifiers. [Loudness-100:1 Ratio]
12AT7 (ECC81): Similar to the 12AX7 but with different gain characteristics, it is used in various audio and instrument applications. [Loudness-60:1 Ratio]
12AU7 (ECC82): Another dual triode tube often used in audio preamplifiers and low-level amplification stages. [Loudness-20:1 Ratio]
The Difference between [NOS: New Old Stock vs. NST: New Style Tubes]:
“NOS” stands for “New Old Stock,” referring to vacuum tubes that were manufactured in the past but have never been or rarely used or installed in any electronic equipment. On the other hand, “New Style Vacuum Tubes” typically refers to tubes that are part of modern production, often created using contemporary manufacturing processes to sometimes mimic vintage tube sounds.
Let’s explore the differences between NOS and NEW style vacuum tubes.
Manufacturing Era:
NOS Tubes: These tubes were produced in the past, often during the heyday of vacuum tube technology. They are unused and have been stored for many years, potentially for decades. As the name suggests, NOS tubes are limited to the stock that was produced in the past. Finding specific NOS tubes might be challenging, and their availability can vary depending on the type and rarity. Some audio enthusiasts and musicians prefer NOS tubes because they believe that these tubes capture the vintage characteristics and “mojo” of the original era. Due to their limited availability and the perception of vintage quality, NOS tubes can be more expensive than their new style counterparts. While NOS tubes can provide a vintage sound, there can be variations in performance due to aging or storage conditions.
NEW Style Tubes: These tubes are newly manufactured using modern production techniques. They may be designed to replicate the characteristics of classic tubes or offer new features and improvements. These tubes are more readily available since they are part of ongoing production. They are often easier to source for current projects or replacements. Manufacturers may design new style tubes to replicate the sound characteristics of vintage tubes or to offer improvements in terms of reliability and consistency. These tubes are generally more affordable, making them a practical choice for those who prioritize cost-effectiveness. Modern manufacturing processes often result in more consistent performance, and these tubes are less susceptible to issues related to age.
In recent years, there has been a resurgence of interest in tube-based audio equipment, with manufacturers blending modern technology with the classic vacuum tube design. This combination allows users to enjoy the best of both worlds. The nostalgic sound of tubes and the reliability and features of contemporary audio systems.
◦ Another Example of Tube Sound [Listen Closely] Follow our Friend Ecc83 via Youtube ◦
