Unitra DSH-605 Integrated Amplifier

Unitra WSH-605 is an integrated stereo amplifier built for listeners who want their system to be both the heart and the brain of their audio setup. Delivering up to a powerful 110 watts per channel in refined Class AB, the WSH-605 combines muscular drive with a naturally expressive sound signature.

Crafted in Poland with meticulous engineering standards, this amplifier follows a modular design philosophy that ensures long-term reliability and upgradeability. Its comprehensive input array includes both analog and digital connections, complete with a dedicated phono stage for vinyl lovers, while an on-board ESS Sabre DAC brings digital sources to life with clarity and precision.

The WSH-605 doesn’t just amplify...it perfects. Sophisticated error correction circuitry, exceptionally low harmonic distortion, and a high damping factor work together to deliver control, accuracy, and effortless dynamics across all genres. A dedicated headphone amplifier and advanced safety features round out a design that’s as versatile as it is uncompromising.

Carefully Crafted Details

The design of the WSH-605 combines classic elegance with practical functionality. The entire chassis is made of metal, with a fine brushed aluminum finish on the front panel. For convenient operation and precise adjustment, the panel features large and robust source selection and volume/balance/tone control knobs as well as distinctive retro-style toggle switches. The minimalist layout and fine craftsmanship highlight the quality of the materials and the designers’ meticulous attention to detail.

Preamplifier

The preamplifier section comes with precise volume and tone controls, a source selector, a phono stage for MM cartridges, and an ESS Sabre DAC with four digital inputs. To ensure pristine signal quality, all connections between the inputs on the rear panel and the potentiometers on the front panel are balanced to minimize interference.

Digital-to-Analog Converter (DAC)

The ESS Sabre digital-to-analog converter (DAC) offers excellent jitter performance and supports a broad range of signal sources. Thanks to its advanced jitter reduction technology, it provides excellent sound stability and clarity even with high-jitter equipment such as TVs and STBs.

Digital Inputs

Two coaxial inputs and two optical inputs are available for connecting digital sources such as TVs or CD players, making the amplifier a very versatile solution for home audio systems.

Power Amplifier with Innovative Error Correction Technology

The power amplifier section of the WSH-605 is based on advanced error correction technology, rarely found in audio designs. Implementing gain error correction directly in the power stage enables exceptional sound fidelity with minimal harmonic and intermodulation distortion. This solution eliminates the typical compromises associated with traditional feedback circuits. The correction is global in nature, allowing precise compensation of various types of distortion throughout the entire signal path.

Headphone Amplifier

The built-in low-impedance headphone amplifier is designed with high-end headphones in mind and allows direct connection to the WSH-605. With carefully matched parameters, it provides optimal conditions for each pair of headphones, thus fully utilizing their potential and ensuring the highest sound quality.

Product specification

Output power (RMS)

Class AB, 8 ohms

70 watts

Class AB, 4 ohms

110 watts

Inputs

Analog RCA

AUX, Tuner, Streamer, CD, Phono + GND (MM)

Digital

2 x Coaxial, 2 x Optical

Outputs

Speaker terminals, 6.3 mm headphone out, PRE-OUT

Power amplification specifications

Frequency range

7 Hz to 75 kHz

Signal-to-noise ratio (SNR)

108.8 dB

Channel separation

> 75 dB (1 kHz)

Total harmonic distortion (THD)

0.0013% at 1 W, 1 kHz

Intermodulation distortion

IM < 0,0005% (CCIF: 19 kHz + 20 kHz; 1:1)

Audio controls

Bass

Treble

Linear (tone control bypass)

Balance