Q-tron Audio RIAA14B Vacuum Tube High-end OTL Phono Preamplifier

The RIAA14B is designed with a thorough all-vacuum tube and OTL configuration to keep the purity of the signal to the extreme as a phono equalizer that plays the most important role in analog record regeneration.
It is a rare phono preamplifier composed of only 100% vacuum tubes from input to output without any semiconductor, transformer or choke in the audio chain.
The accuracy of the RIAA curve is contained within ± 0.2dB to ensure accurate equalization and timbre naturalness. Designed exclusively for MM cartridges, it has a very high quality and is ideal for users seeking high transparency analog playback.
The fono input has two RCA pins, and the cartridge load can be set separately for each input. The output is equipped with RCA and balance XLR to flexibly accommodate various systems.

Analog playback of "colorless transparency" produced by full OTL configuration

The biggest feature of the RIAA14B is that it has an all-stage vacuum tube +OTL configuration, while achieving high S/N and low distortion and excellent linearity.
The OTL method completely eliminates magnetic distortion and bandwidth limitations through the transformer and amplifies the input analog signal as it is.
Noise is suppressed below 5mV -80dBA input criteria, a very quiet background is secured, analog-specificholographic soundstageAnd the reproducibility of the hall tone stands out. The overload margin is higher than 30dB, and dynamic music can be played without distortion.

Highly stable power supply circuit and 10mm thick aluminum chassis support "silence"

The RIAA14B uses the most important noise countermeasures in analog regeneration, and the anode and heater have a dedicated, highly stable power supply.
This reduces ham and power source fluctuations to extremely low levels and maximizes the expressiveness of micro signals.
The main body is composed of three high-quality PCBs, with a 10mm-thick aluminum machined chassis that completely blocks external vibrations. By eliminating vibration-induced noise, the low frequencies are tightened, and the transparency of the mid and high frequencies is further enhanced.

Ideal combination with the static PRE14B, PA12B, PA3B, and PA34B

The RIAA14B is designed to maximize the transparency and accuracy of the entire system when used in combination with Q-tron's PRE14B preamplifier or PA12B/PA3B/PA34B.
Since these OTL amplifiers have extremely high resolution and low distortion, the phono equalizer also requires equivalent purity. The RIAA14B meets these requirements, conveying the charm of analog records without compromising the crystal-clear sound quality of the OTL power amplifier.
Of course, even in combination with other brands' systems, it performs exceptionally well as a transparent, color-free RIAA equalizer.

Accurate RIAA characteristics and quiet, extended expressiveness

The RIAA14B maintains RIAA curve accuracy within ±0.2dB, accurately reproducing the characteristics recorded on vinyl records. Its low noise floor and high overload margin allow listeners to enjoy a wide range of music genres—from delicate classical pieces to energetic jazz—with a natural balance.
The soundstage is wide and transparent, the harmonics are clear and extended, and the unique texture of analog immediately emerges—
The RIAA14B is a vacuum tube OTL phono stage born for listeners who want to purely enjoy the charm of analog playback.