Integrated DC amplifier using Technics' new original class A system.

It employs a new class-A amplification method that uses a Technics-exclusive synchronous bias circuit and eliminates switching distortion, which is the cause of cloudy sound.
Switching distortion occurs in Class B and AB amplifiers because the positive and negative waveforms become symmetrical near the zero-crossing point of the signal due to the carrier stacking effect when the output transistor is turned on and off. In a synchronous bias circuit, a constant bias is applied to the output stage so that the output stage is always on and the switching distortion is zero.
In the new class A crossover distortion is also eliminated.
Crossover distortion is caused by a time shift between the positive and negative waveforms due to excess or deficiency of quiescent current; furthermore, the waveform itself does not have an ideal quadratic characteristic, and the combined positive and negative transfer characteristic does not become a straight line. In the new Class A, the signal path and bias current are independent, so the output transistor always maintains an appropriate operating point, and the high-speed response diode that switches between the positive and negative waveforms has an almost ideal quadratic characteristic, so crossover distortion is zero.

A direct DC system is adopted in which a high-gain input is directly connected to a high-gain DC power amplifier to achieve faithful frequency characteristics in amplitude and fase up to the DC region.
In addition, the differential amplification circuit of the first stage of the power amplifier is composed of a dual FET chip, and DC drift is suppressed to ±10 mV or less in the range of -10℃ to +50℃. Furthermore, NFB is suppressed to 45 dB by adopting a circuit configuration that significantly improves the stripping characteristics, such as the linear cascade circuit and the 3-stage Darlington circuit.

The phono equalizer uses a differential amplifier dual-Low-noise FET in the first stage. Both the MM and MC are ICL equalizers with a connected input capacitor, realizing a basic low-noise, high-gain MC design.

It uses a concentrated power block, and by integrating the power supply and output transistor and connecting them at the shortest distance, it minimizes the high-frequency distortion caused by electrical waves.romagnetic.

The power section features two completely independent power configurations with separate power transformers for the left and right channels, eliminating transient crosstalk across the power section.
Additionally, a constant-voltage FET load is used to load the constant-voltage power supply error detection circuit. By stably supplying a constant voltage with a high ripple suppression rate from the voltage amplification stage to the first stage of the main amplifier, self-transient crosstalk is avoided.
The power transformer has a structure in which the coil is immersed in a special resin and stored in a protective casing. This achieves a truck cage and high SN ratio (minimizing mechanical vibrations of the transformer).

Equipped with a Super Base tone control that allows you to expand the frequency and characteristics of the speaker up to an octave into the lower range with shelving tone.
This Super Bass can be used not only to correct the ultra-low frequency characteristics of speakers, but also to eliminate low-range boominess caused by the acoustic characteristics of the listening room. When the reverberation time is long, the room emits an unpleasant sound at a specific low-range frequency. With Super Bass activated, you can use the normal bass tone control to attenuate only the boomy frequency range.

The tone control is a half-deviated type.

Equipped with a self-recovery type protection circuit that disconnects the speaker by activating a relay when a DC component appears on the speaker terminal or when the speaker terminal is short-circuited.

Evaluation Model
Type Integrated DC amplifier

Effective Output (20 Hz to 20 kHz) 110W + 110W (8 Ω, 0,007%)
Total harmonic distortion factor 0,003% (nominal output -3dB, 20Hz to 20KHz)
Power Bandwidth (THD 0,02%) 5 Hz to 100 kHz
Frequency response (direct DC) DC ~ 20 khz + 0 -0,1 db
DC ~ 150khz + 0 -3dB
TIM Not measurable
SN Ratio (IHF-A, Direct DC) 106dB
Residual noise (direct DC) 550 μV
Damping factor (8 Ω) 60
Load impedance Main or remote: 4 Ω ~ 16 Ω
Main and Remote: 8 Ω ~ 16 Ω

Input Sensitivity / Impedance Phono MM: 2,5mV/47kΩ
Phono MC: 170 μV/47 Ω
Tuner, Aux, Tape: 150mV/47k Ω
MM phono SN ratio: 88 dB
MC: 71 dB (250 μV input)
Phono Frequency Characteristics 20Hz to 20kHz, RIAA ±0,2dB
Bass Shelving Tone: ±7 dB (100 Hz)
Treble: ±10 dB (20 kHz)
Super bass: +12 db (30 hz, 12dB/oct)
Bass rotation frequency: 500 Hz
Treble: 2 kHz
Super bass: 75Hz, 150Hz (12dB/oct)
High Filter: 7 kHz, -6dB/oct.
Subsonic : 20 Hz, -12dB/oct.
Loudness control +7 dB (50 Hz, volume -30dB)
Muting -20dB
<Generale
Power supply 100 VAC, 50Hz/60Hz
Power consumption 260W
External dimensions Width 430x Height 153x Depth 351 mm
Weight 15,7 kg

Technics, a Japanese brand founded in 1965 by Panasonic Corporation as a division dedicated to high-fidelity and professional audio technologies, is one of the cornerstones of the global hi-fi industry. Positioned in the premium segment of the international hi-fi market, Technics has won over audiophiles and audio professionals with its superior build quality and innovative technological solutions that have redefined the standards of home music listening.

Technics' corporate philosophy is based on the concept of "Reference Class" audio reproduction, pursuing the most faithful music reproduction possible by eliminating all distortion and signal coloration. This vision has guided the Japanese company since its inception, when Technics engineers set out to create hi-fi components capable of satisfying the needs of both the most discerning audiophiles and music industry professionals. Technics' technological research focuses on material innovation, the optimization of analog and digital circuits, and the development of advanced mechanical solutions for vibration isolation. The brand has always favored rigorous engineering over passing fads, investing heavily in research and development to ensure reference-level audio performance. Partnerships with prestigious artists and recording studios have allowed Technics to test its products under the most demanding conditions, continuously refining its proprietary technologies to achieve new heights in home music reproduction.

Technics' signature technologies include the acclaimed Direct Drive system for turntables, which eliminates rotational irregularities typical of belt-driven systems through a digitally controlled brushless motor. The Lambda Super Linear Converter technology represents the evolution of Technics' digital-to-analog converters, ensuring extremely precise and linear signal conversion across the entire audio spectrum. The LAPC (Linear Arithmetic Processing Core) system optimizes digital signal processing, reducing jitter and improving dynamics. Innovative vibration isolation solutions, such as the Dual Layer Turntable Construction, eliminates mechanical interference that could compromise the purity of the audio signal.

The Technics product lineup extends from reference turntables to integrated amplifiers, from high-end CD players to floorstanding and bookshelf speakers for audiophile stereo systems. The source division includes the legendary SL series turntables, true industry benchmarks, and CD/SACD players that implement the most advanced digital playback technologies. Technics amplifiers, both solid-state integrated amplifiers and separate power amplifiers, are distinguished by their linearity and exceptional control of the most demanding speakers.

The Reference Class series represents the pinnacle of Technics production, with components such as the SL-1000R turntable incorporating technologies derived from aerospace research and the SE-R1 separate amplifier system using fully balanced circuitry and next-generation switching power supplies. The Grand Class line offers more accessible solutions while maintaining high quality standards, perfect for audiophiles who want to approach the world of Technics without compromising performance. Technics Pre- and Power Amplifier modules guarantee maximum flexibility in building customized hi-fi systems, allowing free upgrades.dualie configurations optimized for each listening environment.

Technics has received numerous accolades from the international audio press, including prestigious awards from magazines such as Stereophile, What Hi-Fi, and Hi-Fi Choice. Technics products are regularly selected among the "Best Buy" lists of leading audio publications, confirming their technical excellence and competitive price-performance ratio in the premium hi-fi segment.

Technics' target audience includes discerning audiophiles, vinyl collectors, classical and jazz enthusiasts, as well as music industry professionals who demand reference standards for monitoring. The price range extends from the affordable premium segment to ultra-high-end products, with investments starting from a few thousand euros for entry-level models up to significant figures for Reference Class components.

In Italy, Technics is distributed through a select network of specialized hi-fi dealers who guarantee qualified technical advice and after-sales service. The Italian technical service ensures rapid response and original spare parts, supporting audiophiles in maintaining and optimizing their Technics stereo systems for consistently top-notch audio performance.