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ETON (Eton) 100W X 4ch power amp MA series MA-150.4 digital power amp

ETON (Eton) 100W X 4ch power amp MA series MA-150.4 digital power amp
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$ 528.49 (¥ 57,834)
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It was of high-quality sound, and the new MA series condensed a technique on a compact body and evolved to digital (D grade) power amp of the next-generation standard that realized a low consumption electric current.
172*50*231mm, MA-150.4 call the body size 172*50*281mm MA-100.4/MA-750.1
I realize overwhelming downsizing. I adopt a body made by an exclusive design aluminum die-casting of the mat black finish and direct improvement and the sense of quality of the shield effect.
In addition, the high technique that and it is low distorted high SN ratio realizes making it it is put into power supply region, analog region, PWM conversion region, output region, a low pass part to assume it the power amp which performed digitization (D grade).
The power supply part assumes it parallel constitution of strong MOS-FET, and the condenser of the smooth part is equipped with macroscale.
I suppressed the change of the output impedance and assumed stable electricity the circuit which it could supply.
I adopt the op-amp for exclusive use of the audio system in the analog part of the input. A first grade part, a filter part is a circuitry of high-quality sound together.
In addition, I adopt an analog switch for a high level and the input reshuffling of the Lorre bell.
I prevent sound quality deterioration by using an analog switch and largely improve aged deterioration.
In the PWM conversion (pulse conversion) circuit which became the core of the digital amplifier, I adopted the trance conductance amplifier of the 1 tip IC made in Japan.
This trans conductance amplifier can hold an error and dead time of the quantization in check and accurate signal conversion is accomplished and achieves and it is low distorted high SN ratio.
In addition, 1 becomes available for the stable movement that held noise mixture in check by chipping it.
I adopt high withstand pressure, high current, a device of the super low ON resistance called 32m Ω lower than in MOS-FET of the finals department.
Furthermore, I realize the circuitry which held floating inductance in check in pursuit of the design of the print pattern.
In addition, the low-path filter to convert into analog from digital makes much of sound quality and is comprised of film condenser and OFC coil.
By these new technologies, the new MA series came up as D grade power amp (in MA-100.4/150.4 in full-range speaker D grade, MA-750.1 for exclusive use of the sub woofer) which let high quality sound and a low consumption electric current were high-dimensional, and they be compatible.
I am equipped with a convenient built-in crossover function, and, in MA-100.4/150.4, in MA-750.1, 50 is setable with an LP in the range of 250Hz 50 with HP or an LP in the range of 250Hz. In addition, it is equipped with the effective bus boost function at the time of use of LP.
A convenient remote level controller is attached to MA-750.1.
I cope with the high level input that I can connect to the speaker output of the head unit in all models.
In addition, I am equipped with a pre-out terminal. As I output it through input signal バファー, it is convenient for at the time of the use of plural amplifiers.
[MA-150.4 specifications]
■A channel mode: 2ch/3ch/4ch ■ output electricity: 100W X 4ch: 4 Ω stereo
150W X 4ch: 2 Ω stereo
300W X 2ch: 4 Ω bridge
■The movement voltage: 9-16V
■Frequency properties: 20 - 20KHz
■The distortion rate: Less than 1.00%
■SN ratio: More than 90dB
■Dumping factor: More than 200
■Input sensitivity: 0.15V (150mV) - 8.0V
■Input impedance: 20KΩ
■High level input: Correspondence (input by the RCA plug)
■A crossover type: HP/LP reshuffling type barrier bulldog
■A crossover frequency: 50-250Hz 12dB/oct
■Bus boost: 0 - +18dB/45Hz (only in Rear ch)
■External form dimensions (W X H X D): 172*50*281 (mm)

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