Q-tron Audio RIAA14B High-End Tube OTL Phono Preamplifier

The RIAA14B is designed as a phono equalizer that plays the most critical role in analog record playback. To preserve the purity of the signal to the utmost, it is meticulously designed with an all-tube, OTL configuration.
No semiconductors, transformers, or chokes are used anywhere in the audio chain; it is a rare phono preamplifier composed entirely of tubes from input to output.
The RIAA curve accuracy is kept within ±0.2dB, achieving both precise equalization and natural tone. Designed exclusively for MM cartridges, it offers exceptionally high quality and is ideal for users seeking highly transparent analog playback.
The phono input features two sets of RCA connectors, allowing individual cartridge loading adjustment for each input. The outputs include RCA and balanced XLR, providing flexible compatibility with a variety of systems.

Ultra-transparent analog playback created by a completely OTL configuration

The most noteworthy feature of the RIAA14B is its all-tube, OTL configuration, which achieves high S/N ratio, low distortion, and excellent linearity.
With the OTL method, magnetic distortion and bandwidth limitations caused by transformers are completely eliminated, amplifying the analog signal exactly as it is input.
Noise is kept below -80dBA with a 5mV input, ensuring an extremely quiet background, highlighting the unique sense of space and hall tone characteristic of analog. The overload margin is also high at over 30dB, allowing ample reproduction without distortion even for dynamic music.

Highly stabilized power supply circuit and 10mm thick aluminum chassis support 'silence'

The RIAA14B thoroughly addresses noise, the most critical aspect of analog playback, employing advanced, custom-designed stabilized power supplies for both the anode and heater.
This minimizes hum and power-derived fluctuations to extremely low levels, maximizing the expression of minute signals.
The main body is composed of three high-quality PCBs, and the 10mm thick machined aluminum chassis completely blocks external vibrations. By eliminating vibration-induced noise, the low range is tightened and the clarity of the mid-high range is further improved.

Ideal combination with static PRE14B, PA12B, PA3B, PA34B

The RIAA14B is designed to be combined with Q-tron's PRE14B preamplifier and PA12B/PA3B/PA34B to maximize overall system clarity and accuracy.
These OTL amplifiers have extremely high resolution and low distortion, so their phono equalizers must be equally pure. The RIAA14B meets these requirements and conveys the charm of analog records without sacrificing the crystal clear sound quality of an OTL power amplifier.
Of course, even in combination with other companies' systems, it provides extremely high performance as a transparent RIAA equalizer with no coloring.

Accurate RIAA characteristics and quiet and expressive power

The RIAA14B's RIAA curve accuracy is suppressed to within ±0.2dB, accurately reproducing the recording characteristics of records. The low noise floor and high overload margin allow you to enjoy a wide range of musical genres, from delicate classical to energetic jazz, with a natural balance.
The sound field is wide and transparent, the overtones are clear and elongated, and the unique texture of analog comes out as is.
The RIAA14B is a vacuum tube OTL phono stage created for listeners who want to truly enjoy the charm of analog playback.