High-Fidelity Power Amplifier Technics SE-R1E-S

JENO Digital Circuit

In digital systems, jitter is the main cause of distortion. It results from poor synchronization of the clocks managing the analog-to-digital conversion. To eliminate sound degradation due to jitter, Technics has developed its own jitter reduction circuit, integrating a clock generator within the noise reduction circuit to reduce jitter in low frequencies. It also incorporates a high-precision sampling converter to suppress jitter in high frequencies. Thus, jitter is reduced across all frequency ranges.

It works in conjunction with a newly developed, original, and high-precision PWM (Pulse Width Modulation) circuit that optimizes the degree of re-quantization and the progressiveness of the curve to achieve lossless N/A conversion. This technology allows Technics to obtain a natural, delicate sound that includes all the nuances of the signal.

GaN MOS-FET Transistor Driver Stage

Within the amplifier’s power stage, Technics uses a low-resistance GaN (gallium nitride) FET transistor driver stage. This enables the fabrication of a simple push-pull power amplification configuration, reducing the signal circuit and ensuring excellent linearity regardless of the sound level.

Load-Adaptive Phase Calibration

A speaker’s impedance is not constant; it varies with frequency, altering the amplifier’s load and potentially the sound. Technics can measure the amplifier’s frequency/phase amplitude capabilities based on the connected speaker and has developed an algorithm for optimizing speaker impedance using digital signal processing to achieve a linear “amplitude/phase” curve.

Original Digital Signal Transmission

Some systems use a digital link between the source and the preamplifier, thus maintaining the digital purity of the signal for as long as possible. Technics Digital Link goes even further. It eliminates the preamplifier’s volume control function and instead transmits the volume information directly to the amplifier along with the audio signal in digital form. The amplifier’s jitter reduction circuit reduces the effects of jitter in the signal transmission and controls the volume directly at the PWM converter level. This new sound transmission interface, Technics Digital Link, supports audio signals up to 32-bit/384 kHz and eliminates inter-channel effects by transmitting the right and left channel signals separately.

Technics Digital Link is thus an ideal amplification configuration, minimizing degradation between the preamplifier and amplifier, achieving superb stereo separation, and reproducing the most subtle signals. The result? An even more dynamic and detailed sound.

Ultra-Fast, Linear, and Silent Power Supply

The precise reproduction of dynamic and powerful sounds, from low signals to delicate nuances, requires an amplifier with a special power supply. It must be both powerful and silent, capable of responding instantly to changing audio signals without voltage fluctuations.

The power supply circuit of a traditional amplifier consists of a high-capacity power transformer and a rectifier circuit: after examining the different ways to obtain the ideal voltage and current waveforms, Technics decided to use a linear power supply coupled with a large buffer stage. These technologies integrated into the power supply circuit allow the amplifier to fully power the speakers under any conditions.

Battery-powered clock generator

The clock generator being a particularly sensitive circuit, it requires a power supply completely isolated from any noise or variation of the main power supplies. Technics has extensive experience in using battery isolation, using it to create an ultra-low noise preamplification stage in its older analog amplifiers.

Technical specifications

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)

Digital technology

JENO digital circuit
GaN-FET transistor driver stage
LAPC (Load Adaptive Phase Calibration)
Technics Digital Link (Original digital signal transmission)
Ultra-fast silent linear power supply
Battery-powered clock generator
Dual mono construction
High-rigidity dual metal chassis

Exclusive Technics manufacturing

Raw aluminum finishes
Large VU meter backlit by white LEDs
Symmetrical structure

Measurements

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)
THD+N: 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