The encounter was so strange that I got to deal with Swedish luxury amplifier brand Q-tron audio. Shy, this brand also spent time without knowing OTL amplifier things that do not use output transformer until you know each other.
But!
If you look into it for a moment, you will be interested in Q-tron's technical capabilities, which cleared and summarized all of the marvels of this OTL (Output Trans-Less) amplifier and paper-single. For example, Mazda overcame the high performance and non-productivity of rotary engines. 。 Speaking of which, Königsegg, a supercar manufacturer loved by VIPs around the world at the fastest speed with its original design, is also Sweden. Q-tron is also an old audio journalist's vivid sound and design breaking the existing concept is amazing in Nordic Sweden.
OTL amplifiers bring new dimensions to conventional vacuum tube amplifiers through unique technology and design. A normal vacuum tube amplifier uses an output transformer to convert the low impedance of the speaker into an appropriate load impedance, but the transformer provides constraints on sound quality and causes distortion and frequency characteristics. The OTL amplifier stands for "Output Transformer Less," which completely eliminates the output transformer and provides smooth and clear sound. This ensures a much more transparent sound than conventional amplifiers.
Q-tron OTL amplifier product page is here
https://exclusive-audio.jp/collections/qtron
The OTL amplifier of Q-tron has a particularly high resolution of bass and treble, and it reproduces even the minute nuances of music. The single-ended vacuum tube amplifier (SET) keeps you warm, but listening is hard to get tired, and it is characterized by a wide sound. In addition, the superior transient response enriches the dynamics of music, allowing you to enjoy even clearer sound quality than traditional push-pull amplifiers.
In addition, the Q-tron adopts an improved Futterman circuit, which has a lower output impedance than the Circlotron circuit and can be used with 4Ω speakers. By achieving high output with less vacuum tubes and preventing thermal runaway and degradation of vacuum tubes, reliability and stability are enhanced. On the sound quality side, the original driver stage achieves a distortion reduction of more than 10 times, and the 25W output model (PA12) achieves a phenomenal low distortion of less than 0.01% in 1W and 0.1% in 10W. Moreover, this performance is realized without excessive feedback.
The noise level also boasts the industry's highest level of 100dBA or less, maintaining high reliability even for long periods of use. It is a testament to Q-tron's reliability that it uses high-quality parts designed and manufactured in Sweden and has never reported a failure in production for more than seven years.
Q-tron Audio's OTL amplifier is a new standard for vacuum tube amplifiers that combine transparent, clear sound, excellent durability and safety. Please try the highest quality sound experience.
Q-tron Audio's amplifiers pay close attention not only to their outstanding sound quality, but also to preamplifiers and safety.
First, the Q-tron preamplifier is designed to bring out the best performance in combination with the power amplifier. It achieves very low noise levels and distortion, providing a very clear and transparent sound quality throughout the amplifier. In addition, high-precision volume control is installed, enabling volume adjustment using 64-step discrete resistors. This volume is switched by relay and uses gold plating at the contact point, ensuring durability and signal purity.
For safety, Q-tron Audio provides thorough consideration. Some OTL amplifiers have designs that are risky for speakers and listeners, but Q-tron amplifiers do not require such worries. Especially when using expensive speakers, you should avoid the risk of the speaker failure in case of an accident. The Q-tron amplifier incorporates a protective circuit that immediately shuts down the amplifier in the event of a DC voltage harmful to the output, and adds a super-fast fuse. With this double protection mechanism, you can enjoy high sound quality with confidence while protecting the speaker firmly.
Q-tron Audio uses an improved Futterman circuit out of two typical OTL circuits: Futterman and Circlotron. The Futterman circuit features a simple power supply design and low output impedance, and can be used for 4Ω speakers. Compared to Circlotron circuits, high power can be achieved with less vacuum tubes, and the output is connected to the ground, providing reliable and stable performance. The Circlotron circuit, on the other hand, operates in a symmetrical design and is particularly well balanced in sound, but is more complex than the Futterman circuit, requiring many vacuum tubes and special power supplies.
The improved Futterman circuit of Q-tron reduces output impedance even lower, achieving stable high output and clear sound quality with less vacuum tubes. This improves the lifetime and reliability of vacuum tubes. The improved Futterman circuit also eliminates the risk of electrical shock completely. For this reason, Q-tron OTL amplifiers can be used safely with headphones. Ensuring electrical safety, especially when using headphones, has been a challenge for conventional OTL amplifiers, but Q-tron designs have cleared the problem.
The Q-tron Audio not only provides the best sound for vacuum tube amplifiers, it also delivers an unmatched design for reliability and safety. All components designed and manufactured in Sweden are of the highest quality, such as Nichicon, Kemet, Panasonic, KOA, and Vishay Vithrom, which ensures consistent performance over the long term.
The OTL amplifier of Q-tron Audio is the ultimate amplifier that combines clear, high resolution sound, durable design and the highest level of safety. From preamplifier to power amplifier to speaker protection, please feel the design without compromise.
Information on hearing machine lending (only in Japan)
Why not experience the charm of Q-tron Audio's OTL amplifier in your own audio environment?
In our shop, we offer a hearing machine rental service for customers who are considering purchasing.
The rental period is one week, only shipping fee will be charged.
