something wonderful
find musical bliss
high fidelity stereo mono
analog digital tubes solid-state

Technics SE-R1


Technics SE-R1

Stereo Power Amplifier

Sets a new high performance standard for digital amplifiers by employing
state-of-the-art components and innovative technologies.

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Technics SE-R1

JENO Engine (Jitter Elimination and Noise-shaping Optimization)

Jitter is a major cause of distortion in digital systems, and is caused by mis-timing in the master clocks used in digital-to-analogue conversion. To eliminate the degradation of sound caused by jitter, Technics has developed an original jitter reduction circuit, comprising a clock generator in the noise-shaping system to reduce jitter in the low-frequency range and a high-precision sample rate converter for suppressing jitter in the high-frequency range. Thus it reduces jitter in an ideal way over the entire frequency range.
This works with a newly-developed and original high-precision PWM (Pulse Width Modulation) conversion circuit, optimising the noise-shaping speed, the degree and requantisation number, and the PWM gradation, in order to convert high-resolution signals to PWM without causing any damage to the dynamic range. These new technologies enable new Technics digital amplifier designs to reproduce the natural and delicate nuances of music.

Concept of JENO Engine
Block Diagram of Digital Amplifier
Output of R1 JENO Engine

GaN-FET Driver (High Speed and Low Impedance Power devices)

In the speaker-driving section of the Technics amplifier, Technics has employed a high-speed GaN (gallium nitride) FET driver device with super-low resistance. This enables the construction of a high-power amp using a single push-pull configuration, allowing the length of the large current carrying signal path to be shortened, and resulting in outstanding linearity regardless of the sound level.

Block Diagram of Digital Amplifier
GaN/MOS-FET Characteristics
Photo of Circuit Board Power Amp / GaN-FET

LAPC (Load Adaptive Phase Calibration)

The impedance of a speaker is not constant: it varies according to frequency, thus altering the loading on an amplifier and therefore potentially the sound. Technics is able to measure an amplifier’s frequency amplitude-phase characteristics with speakers connected, and has developed a speaker impedance adaptive optimisation algorithm using digital signal processing to achieve ideal impulse response. Correction processing based on the new algorithm achieves a flat frequency response for both amplitude and phase, not possible in conventional amps, and delivering a sound with rich spatial expression.

Concept of LAPC
Gain and Delay by Conventional Amplifier / LAPC

Technics Digital Link (Original Digital Signal Transmission)

Some systems use a digital link between source component and pre-amplifier, keeping the digital signal pure as long as possible: Technics Digital Link goes further. It has eliminated the volume control function from the pre-amplifier, and instead transmits the volume control information, together with the audio signal, directly to the power amplifier in digital form. The power amp’s jitter reduction circuit reduces any effect of jitter in signal transmission, then performs the volume control immediately before the PWM converter. This new sound transmission interface, Technics Digital Link, supports audio signals and also eradicates inter-channel effects by transmitting the left and right channel signals separately. Technics Digital Link has achieved an ideal amplifier configuration, minimising any degradation between the pre-amplifier and the power amp, and resulting in superb stereo separation and reproduction of even the most subtle signals. The result is a more detailed and dynamic sound.

Concept of Technics Digital Link
Block Diagram of Technics Digital Link between SU-R1 and SE-R1

High-speed Silent Linear Power Supply

The accurate reproduction of everything from dynamic and powerful sounds to the low-level signals expressing delicate nuances requires a special power supply in an amplifier. It needs to be both powerful and low-noise, as well as capable of responding instantly to a continuously changing audio signal without any voltage fluctuation. The power supply circuit of an ordinary amp consists of a large-capacity power transformer and a rectifier circuit: after examining ways to achieve ideal voltage and current waveforms, Technics decided to use a choke-input rectification, plus a discrete stabilised power supply circuit. These technologies incorporated in the power supply circuit enable the amp to drive the speakers powerfully under any conditions.

Circuit Diagram of High-speed Silent Linear Power Supply

Battery Driven Clock Generator

The best power supply for delicate circuitry such as the clock generator in the new amplifiers is one entirely isolated from any noise or fluctuations in the mains supply. Technics has extensive experience in circuits using battery isolation, having used them to create ultra-low-noise pre-amplifier stages in past analogue amplifiers.


Dual Mono Construction

The main amplifier layout separates the left and right channel signal paths completely, all the way back to the secondary winding on the power transformer, to prevent mutual interference and also achieve an ideal weight balance. This design gives optimal stereo separation, and also allows the two channels to be laid out in ‘mirror image’, giving equal signal-path lengths for each channel.

Signal Path Minimisation

The length of the signal path is kept as short as possible to improve the signal to noise ratio, reduce potential sources of distortion and interference, and give the most direct communication of the music.

High Rigidity Metal Double Chassis

To support heavy parts and components and lower the centre of gravity for improved stability, the inner chassis of the SE-R1 is made of 3-mm-thick plate, but the amplifier uses a huge, and very heavy, mains transformer: to support this better and reduce vibration, columns of die-cast aluminium are arranged at appropriate intervals between the bottom inner chassis and outer chassis. The external casing is made of a 7-mm-thick aluminium plate to resist the effect of electromagnetic noise.

Photo of internal structure

High-quality Parts

Large, newly designed speaker terminals enable the connection of thick cables, and even the screws are high precision to ensure they remain tight, giving a firm and reliable cable connection. The insulators are cast iron for high rigidity and an excellent damping effect: this reduces both susceptibility to vibration, and the transmission of any vibration to external devices.

Photo of speaker terminal
Photo of insulators

Reference Class SE-R1

Show the enlarged photo of the front of SE-R1
Show the enlarged photo of the rear of SE-R1
Accurate Digital Technology
JENO Engine
(Jitter Elimination and Noise-shaping Optimization)
GaN-FET Driver
LAPC (Load Adaptive Phase Calibration)
Technics Digital Link
High-speed Silent Linear Power Supply
Battery Driven Clock Generator
Dual Mono Construction
High Rigidity Metal Double Chassis
Technics Definitive Design
Aluminium Plain Miter Joint
White LED Illuminated Large Level Meter
Symmetric Structure
Output Power
150 W + 150 W (1 kHz, T.H.D. 0.5%, 8 Ω, 20 kHz LPF)
300 W + 300 W (1 kHz, T.H.D. 0.5%, 4 Ω, 20 kHz LPF)
Input Sensitivity / Input Impedance
UNBALANCED 1.2 V / 47 kΩ, BALANCED 1.2 V / 47 kΩ
Frequency Response
1 Hz – 90 kHz (-3 dB, 8 Ω)
0.05 % (1 kHz, 75 W, 8 Ω, 20 kHz LPF)
Load Impedance
A or B, Bi-wiring: 4-16 Ω, A + B: 8-16 Ω
Analogue Input Terminal
Digital Input Terminal
Technics Digital Link x 1
Power Supply
AC220-240 V, 50 Hz/60 Hz
Power Consumption
210 W
Dimensions (W x H x D)
480 x 241 x 567 mm
Approx. 54 kg
AC Cords, Operating Instructions

Brandstraat 28
9255 Buggenhout