Nakamichi FHA100 amplifier
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Nakamichi FHA100 Amplifier
The Nakamichi FHA100 is a powerful Class D monoblock from the Fidela series, designed for maximum performance and absolute stability even under extreme loads. Its design, selection of top-tier components, and extremely robust power supply make this amplifier an ideal choice for powering high-performance subwoofers in top-tier setups. Inside the amplifier, there are 16 power transistors 50A60VMOS ensuring stable power supply and high current reserve. The power section is managed by 14 Infineon MOSFET transistors (20A/200V), ensuring maximum efficiency and uncompromised performance. The power supply section features a copper T45 transformer along with a pure copper output coil, ensuring reliability, low distortion, and thermal stability. The amplifier is equipped with a 13200 µF capacitor bank, providing high dynamics and immediate response even during demanding musical passages. In the signal path, there are ST operational amplifiers and ON Semiconductor optocouplers, ensuring high precision processing without noise and interference. The entire construction is set in a precisely machined aluminum alloy chassis with gold-plated terminals (100A for output, 300A for power supply), guaranteeing not only electrical stability but also long lifespan and top mechanical properties.
Fidela - Nakamichi's Premier Line
Fidela represents the highest class from Nakamichi, combining the brand's rich history with modern technologies and precise craftsmanship. Originally, the Fidela brand was associated with high-end tape recorders in the 1960s, known for their innovative mechanics and unparalleled sound. Today, the Fidela brand focuses on car amplifiers and DSP processors that use top-tier components for maximum sound quality. Besides high-quality components, key features of Fidela amplifiers include perfect craftsmanship and premium design. These attributes make Fidela amplifiers an ideal choice for demanding users seeking high sound quality and extensive customization options in an automotive environment.
Main Features
- Class D monoblock from the premium Fidela line.
- Ideal for subwoofers and high-performance applications.
- 16× 50A60VMOS transistors for stable performance.
- 14× 20A/200V Infineon MOSFET transistors.
- 13200 µF capacitor capacity for high dynamics.
- Copper T45 transformer, copper output coil.
- ST operational amplifiers, ON optocouplers.
- 100A gold-plated output block, 300A power block.
- Aluminum alloy body for cooling and durability.
- Compact, powerful, and extremely stable amplifier.
About Nakamichi
The history of Nakamichi dates back to 1948, when it was founded in Japan by Etsuro Nakamichi. The journey to fulfill his dreams began with the establishment of a small research institute, Nakamichi Research Corporation, in Tokyo, Japan, which provided research on sonars and magnets and development for major brands, government entities, universities, and organizations. Since then, it has established itself as a trusted creator of high-quality products, the result of intensive scientific work, a passion for sound, and a commitment to providing uncompromised quality and performance. In 1972, Takeshi Nakamichi joined Nakamichi Corporation, closely associated with the company's expansion at the time and deeply involved in all legendary Nakamichi audio products sold in Asia, America, and Europe, including the introduction of the Nakamichi 1000, the world's first cassette deck. He was considered one of the world’s top acoustic and sound engineers, capable of combining top-quality sound with the advantages of the ingenious design of audio products by Koza Kobayashi, the brand's chief engineer at the time. The amplifiers, players, and car radios of that era are today among legends, yet Nakamichi remains successful, producing products for home and vehicle sound systems. The manufacturer’s thoughtfully designed portfolio continues to expand, and all products offer an interesting balance of price and quality. Especially the higher model ranges strive to honor the legacy of Etsuro Nakamichi, whose name continues to be reflected in the brand's products today.
| Catalog number | FHA100 |
| Brand | Nakamichi |
| Links | Official web presentation (English) |
| Energy class of the amplifierAmplifiers are divided into two basic classes: analog and digital . Analog amplifiers (A/B) have higher consumption requirements, but usually have a more natural sound. Digital amplifiers (D) have significantly lower consumption and higher efficiency, but the sound may not be as faithful as with classic analog amplifiers. | D |
| Number of amplifier channelsAmplifiers are divided into: - Monoblocks - 2-channel - 3-channel - 4-channel - 5-channel - 6-channel - multi-channel Each channel is used to power one speaker for the coaxial type, or one side if they are component speakers. Monoblock type amplifiers are mainly used for subwoofers. 2-channel are suitable for both subwoofers and, for example, the front pair of speakers in a car. 3-channel is used for front or rear speakers + subwoofer. 4-channel are used for front + rear speakers or 1 pair of speakers + subwoofer. 6 or 5-channel are used for 2 pairs of speakers + subwoofer, most often. Bridging means connecting the amplifier to a bridge, using the + pole from one channel and the - pole from the other channel. In most cases this is shown as "BRIDGED" on the amplifier. | 1 |
| RMS power into 4 ΩRMS power when loading speakers or subwoofer at 4 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier. | 1 x 840 W |
| RMS power into 2 ΩRMS power when loading speakers or subwoofer at 2 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier. | 1 x 1400 W |
| RMS power into 1 ΩRMS power when the subwoofer is loaded at 1 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier. When connected to 1 Ω, significant heating of the amplifier may occur. | 1 x 2000 W |
| Harmonic Distortion (THD)Total harmonic distortion indicates how much the input signal is distorted in the amplifier. Distortions appear as overtones contained in the output signal. The proportion of originally absent parts of the signal is given as a percentage, typical values are between 0.001% and 0.5%. Distortion is measured in their power band. If it exceeds the limit of 0.7% from a certain power, it is the value of the output power of the given amplifier, from which it no longer plays without distortion and from which the distortion usually increases steeply, so that no further increase in power can be counted on. The lower the value, the better. | < 0.2 % |
| Signal-to-noise ratioThe signal-to-noise ratio means that the output signal always contains noise. The signal-to-noise ratio expresses how much of this noise is compared to the useful signal. The so-called A value is given, which does not take deep and very high frequencies into account. This corresponds to the characteristic of human hearing, which is not so sensitive to deep frequencies, especially below 1 kHz. The higher the value, the better the amplifier is. | > 105 dB |
| Input sensitivityIn order for the amplifier to perform its function correctly, it requires an input signal of a certain level, which is different for car radios. It is measured in "Volts" (e.g. 2 V, 4 V, etc.) The higher the value at the output of the pre-amplifier, or car radio, the less demands are placed on the power of the amplifier. However, the amplifier must allow this input sensitivity, and for that reason this value is also given for the amplifier. | 0.35 - 9V |
| Automatic on and offThis function allows you to automatically switch on the amplifier. | Yes |
| Socket input terminalsFerrule terminals allow better wiring contact to the amplifier. It is also a more secure form of terminals. If you are tightening the sleeve terminals, we recommend retightening them after 1 day, as the connected cable gradually compresses. | Yes |
| Dimensions of the amplifier | 325 x 190 x 62 mm |
| Mass | 4.7 Kg |
Evaluation
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