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Location: Japan
Ships to: US,
Item: 224777600509
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Item must be returned within:60 Days
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Item Description Accuphase Integrated amplifier Accuphase E-380 ◆ AAVA (Accuphase Analog Vari-gain Amplifier) method, volume control The main functions of the preamplifier are “input switching” and “volume adjustment”. Volume adjustment is the most important factor that affects sound quality The E-380 uses AAVA for volume adjustment, and a completely new concept of volume control function that adjusts the volume without using a variable resistor. AAVA adjusts the volume by combining the outputs of multiple V-I conversion amplifiers with different gains according to the volume position. ・ Since the volume is directly adjusted by the gain of the amplifier, a high SN ratio and low distortion rate are achieved. ・ Since all circuits can be composed of electronic components, long-term reliability is ensured. ◆ Equipped with 5-MCS input buffer amplifier High signal-to-noise ratio is realized by 5-MCS which operates five high-performance amplifiers in parallel In addition, the drive capacity of heavy-duty V-I converter amplifiers is improved to minimize distortion rate deterioration. ◆ V-I conversion amplifier with improved SN ratio The V-I converter amplifier reduces the noise by increasing the total output current twice as much as before and halving the circuit impedance. In terms of components, low noise and high precision thin film resistors are used more than the previous work. With these improvements, the S / N at the rated output is improved by 2dB and EIA-S / N by 1dB (reduced to 85%) compared to the previous work. The top-level V-I converter amplifier with the largest load distributes the load by parallelizing the circuit in 4 and the next circuit in 2 in parallel to perform operations with a margin. Improves stability and reliability by reducing heat concentration on the board ◆ Rated output increased by 20% by strengthening power amplification stage and power supply The power amplification stage consists of “NPN” and “PNP” “bipolar transistors” in 2 parallel push-pull configuration 180W / 4Ω and 120W / 8Ω rated output equivalent to 20% increase despite the same size as the previous model ◆ Powerful power supply with large transformer and large capacity filter / capacitor Developed a transformer with a large power capacity to increase output power, and newly adopted a 33.000μF large capacity, high sound quality type aluminum electrolytic capacitor for smoothing The preamplifier unit that handles small signals is equipped with a dedicated power supply circuit to prevent interference with the power amplifier. By separating the internal structure of the preamplifier and power amplifier, an ideal operating environment without mutual interference is achieved. ◆ Power amplifier with instrumentation amplifier configuration Introduced “Instrumentation Amplifier” configuration in the power amplifier section The basic circuit for amplification of unbalanced input signals also realizes balanced transmission. Not only is it excellent in various characteristics such as the ability to remove noise generated in the equipment and distortion rate, Extremely resistant to changes in the surrounding environment, further improving stability and reliability as a power amplifier ◆ Equipped with a “current feedback” amplifier circuit with excellent high frequency phase characteristics in the power amplifier section Employs a current feedback amplifier that feeds back the output signal in the form of current. There is almost no change in frequency characteristics even when the gain changes, and the phase characteristics in the high frequency range are excellent. ◆ 25% higher damping factor The damping factor (DF) is the ratio of the output impedance (Z) of the power amplifier to the impedance (R) of the speaker (DF = R / Z). The higher the value, the higher the ability of the amplifier to control the speakers. In other words, higher DF absorbs back electromotive force from the speaker in a shorter time and suppresses unnecessary vibration, realizing ideal speaker drive The E-380 achieves a DF: 500 that is 25% higher than the previous model by reviewing the parts and the pattern in the board. ◆ Balanced remote sensing From the immediate vicinity of the speaker terminal, feedback is applied to both the signal and GND in a balanced manner to reduce the output impedance and improve the damping factor. ◆ “MOSFET switch” is adopted for protection circuit The protection circuit prevents the speaker from being damaged by disconnecting it from the speaker when the amplifier goes into an abnormal state. In general, “output relays” with mechanical contacts are used, but there are problems of increased impedance due to contact oxidation and degradation of performance and sound quality. E-380 uses a “MOSFET switch” with no contacts to solve the problem of deterioration over time and ensure long-term reliability. In addition, the deterioration of sound quality caused by music signals passing through the contacts is prevented. The E-380 uses a MOSFET switch with a very high rated current (160A) and very low ON resistance (0.002Ω). ◆ Protection board and speaker terminal connected with metal pillar In order to keep the impedance lower, the protection board and the speaker terminal are directly connected with an extremely thick and short metal pillar. As a result, the ideal feedback point close to the speaker terminal is realized, and the damping factor and sound quality are improved. ◆ New speaker output protection circuit In addition to the conventional protection circuit that detects abnormal temperature rise and detection of signals containing a lot of DC components, when overcurrent flows through the speaker terminal, Equipped with a new protection circuit that immediately shuts off the output and blinks the meter light to warn ◆ Equipped with two speaker terminals, “Y lag” and “banana plug” can be connected ◆ Preamplifier and power amplifier can be used independently ◆ Balanced connection with abundant input terminals and low external induction noise ◆ Logic relay control signal switching method ◆ Phase can be set individually for each input terminal ◆ Additional active filter method tone control with emphasis on sound quality ◆ “Compensation sweater” to compensate for the lack of bass in hearing ◆ Analog type peak power meter displaying up to -50dB ” ◆ When “DAC50” is installed, PCM supports 32-384KHz, DSD 2.8, 5.6, 11.2MHz display ◆ Equipped with a full-fledged headphone amplifier that emphasizes sound quality ◆ Equipped with a slot that can be expanded with two optional boards The ■ Specification ■ Rated continuous average output: (Both channels operate simultaneously 20 to 20,000Hz), 180W / ch 4Ω load, 120W / ch 8Ω load Total harmonic distortion: (Both channels operate simultaneously, 20-20,000Hz), 0.05% 4-16Ω load IM distortion rate: 0.01% Frequency characteristic: HIGH LEVEL INPUT Rated continuous average output: 20-20KHz (0-0.5dB) MAIN INPUT rated continuous average output: 20-20KHz (0-0.2dB), 1W output: 3-150KHz (0-3.0dB) Damping factor: 500 (8Ω load, 50Hz) Input sensitivity (at rated output): HIGH LEVEL INPUT / 155mV, BALANCED INPUT / 155mV, POWER INPUT / 1.23V Input impedance: HIGH LEVEL INPUT / 20KΩ, BALANCED INPUT / 40KΩ, POWER INPUT / 20KΩ Output voltage: Output impedance PRE OUTPUT / 1.23V / 50Ω (at rated continuous output) Gain: HIGH LEVEL INPUT → PRE OUTPUT: 18 dB, POWER INPUT → OUTPUT: 28 dB Tone control (turnover frequency and variable range): Bass: 300 Hz (± 10 dB / 50 Hz), Treble: 3 kHz (± 10 dB / 20 kHz) Loudness Compensation: + 6dB (100Hz) Attenuator: -20dB Input conversion noise: Input short (A-correction) HIGH LEVEL INPUT / -125dBV, BALANCED INPUT / -114dBV, POWER INPUT / -122dBV S / N ratio: S / N at rated output, HIGH LEVEL INPUT / 109dBV, BALANCED INPUT / 98dBV, POWER INPUT / 124dBV Power meter: Logarithm compression type peak level display, output dB /% display Load impedance: 4 to 16Ω (A and B terminals), 8 to 16Ω (when A and B are output simultaneously) Stereo headphones: Applicable impedance 8Ω or more Power consumption: 46W No input, 292W Electrical Appliance and Material Safety Law, 423W 8Ω load rated output Maximum external dimensions: (width) 465 x (height) 171 x (depth) 422 mm Mass: 22.8kg Attachment: Remote commander: RC-230 Shipping Free Shipping Payment eBay Managed Payments Other Term International Buyers Please Note: Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up -?do not confuse them for additional shipping charges. We do not mark merchandise values below value or mark items as “gifts” – US and International government regulations prohibit such behavior.
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