Integrated amplifiers

German company Burmester calls its new Burmester 232 integrated amplifier “swiss army knife” for audio. The model offers high fashionability and optional offers a full set of streaming functions.

A new integrated amplifier from the British company Musical Fidelity Nu-Vista 600.2 scheduled for release since January 2025. The device is fully consistent with the brand's philosophy and uses a massive design with a dual mono configuration, a solid power supply, preamplifier and power-amp filtering and the use of Class-A tube stage consisting of nuvistor tubes.

The Eleven Audio A390 integrated amplifier is equipped with an electronic volume control based on a resistive R-2R matrix. At the same time, it is possible to adjust the sensitivity of each input, allowing you to smoothly switch between different audio sources.

An overkill solution for the integrated amplifier class. The mono configuration for each channel weighs over 113 kg and is designed in three blocks (the first converts current to direct current and filters, the second works as a power supply, the third amplifies).

Structurally, the Audio Research I/50 is a classic push-pull amplifier with 6550 tubes installed at the output – one pair per channel. The functions of the input and driver tubes are taken over by three 6922 dual triodes.

The integrated amplifier Audio Analogue AACento is built according to a zero-feedback scheme - both in the preamplification section and in the output stages. The signal circuits use ceramic resistors of increased size - this reduces the total heat. Switching of sources is carried out using electromagnetic relays, and the precision digital volume control (but the signal in chain always remains analog) does not use operational amplifiers. The linear power supply contains a toroidal transformer with a power of 480 watts. Cooling radiators for the output stage transistors are located inside the case.

Vincent Audio has updated the popular hybrid integrated amplifier Vincent Audio SV-500, which was named Vincent Audio SV-500 MK. The new product is equipped with a new DAC chip that supports 32-bit / 384 kHz resolution, a Bluetooth module and an HDMI ARC input. Like its predecessor, the Vincent Audio SV-500 MK input stages are implemented on tubes, and the output stages are transistor ones, which allows it to develop a power of 50 watts when working on a load with a nominal resistance of 8 ohms and 80 watts for 4 ohms in each of the channels.

Technics SU-R1000 is a fully digital device. Signals from analog inputs are digitized, all their processing occurs in digital form. The output stages operate in class D, and all power supplies are pulsed. As we know, audiophiles do not respect such solutions too much, preferring time-tested class A/AB amplifiers. Well, the company set an ambitious task - to create a fully digital amplifier (without introducing hybrid circuits for current and voltage into the circuit design, like, say, Devialet Expert 220 Pro, which we recently reviewed), breaking all traditional canons on the topic of how such a device should sound.

Devialet has developed an ADH-class amplification circuit (low-power class A supported by a voltage follower and containing deep negative feedback) specifically for the amplifier line.

Devialet Astra rethinks the concept of High Fidelity, offering 2 x 300 W (4Ω speakers) of output power with zero distortion, zero saturation.

According to the manufacturer, the Unison Research Triode 25 Black Edition has an optimized amplifier circuit - both in the signal path and in the power supply.