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|Esoteric MSW* Pure Class D mono block power amplifier
*MSW= Master Sound Works
Introducing design know-how of professional studio-use power amplifiers
The power amplifier is the core of our integrated amplifier I-03. Esoteric has introduced know-how collected through designing professional studio-use power amplifiers to the power amplifier sections of I-03. The power amplifier of the I-03 continuously balances outstanding drive power and natural tones, and conveys the essence of a master sound recording regardless of the size and efficiency of speaker combinations.
Using Esoteric MSW Pure Class D power amplifier with dual mono architecture
|The I-03 is equipped with a MSW Pure Class D power amplifier that is mounted with high-efficiency and uses the latest high-speed MOS-FET devices in a 3-parallel push-pull configuration to achieve superior speaker drive performance. This power amplifier uses power amplifier blocks mounted in a dual mono architecture separately for each channel to obtain a high practical-use maximum output of 320W+320W (6Ω).|
Analog power circuit support for robust drive performance
|A solid power supply unit makes the music pulse. The I-03 adopts powerful analog power circuits configured using largesize capacitors and high-capacity custom transformers (each transformer weighing approximately 10 kg (22 lbs.)). The MSW Pure Class D power amplifier produces an optimal and distinctive tone that is both robust and smooth.|
High-grade dual mono preamplifier with C-03 technologies.
|The I-03 preamplifier inherits stereo preamplifier C-03 technologies that are highly reputed worldwide and have received a number of awards. This type of preamplifier uses a dual mono architecture with a completely independent board for each channel. The chassis compartment dedicated for the preamplifier is partitioned using a 2mm thick steel plate to install two preamplifier boards for the left and right channels.|
Volume controls based on dual-mono concept Esoteric DVC System*
Esoteric's DVC System uses a rotating control to transmit signals to two preamplifiers located on both sides of the I-03 and simultaneously drives both volume control amplifiers, (which are installed separately on left and right preamplifier boards). Volume controls are provided independently for left and right channels to maintain the left and right audio signals separately, and to achieve a clear sound quality with exceptional channel separation. Furthermore, there is no audio signal wiring from the audio board to the volume control, which significantly reduces the signal path to prevent deterioration of sound quality.
*DVC=Dual-mono Volume Control
Delicate and dynamic sound with low-noise operation
The Esoteric DVC System control board, used for central control of the left and right channels, is installed in a compartment separate from preamplifier boards and has a separate power supply. This design assures low noise operation with a complete shutdown of the control microcomputer except at the time of receiving an operation request.
Bi-amplifier and multi-amplifier drive support
The I-03 responds flexibly to system upgrades of the future. The I-03 is equipped with a RCA output terminal that can be switched between PRE OUT and REC OUT. Any level offset can be set for signals sent to the power amplifier during the PRE-OUT output stage. The I-03 also offers a bi-amplifier architecture that allows connecting various types of external power amplifiers with different input gains.
Making the most of the preamplifier function with the power amplifier shutdown function
The I-03 is equipped with a "power amplifier shutdown function" that shuts down the power amplifier blocks for users who want to use the standalone high-grade preamplifier function. The I-03 is also provided with a headphone jack that enables users to listen to it's high-grade preamplifier sound through the privacy of a stereo headset.
Highly rigid, chassis construction that inherits the K series engineering concept
High sound quality structure from a multiple chassis design
Each circuit block is placed in a dedicated compartment. The compartments are assembled three-dimensionally to minimize interference between circuits and use the shortest signal paths. The internal chassis is divided into five parts, with two separate preamplifier boards for each channel mounted in dedicated compartments closest to the rear connectors. This design keeps the audio signal path short and direct. Two Esoteric MSW power amplifier blocks are connected from the preamplifier using the shortest signal path. These blocks are assembled in dedicated compartments on both sides of the chassis and mounted via aluminum plates on both side panels. Using the side panels as heat sinks, this integrated amplifier efficiently discharges heat without compromising its sleek form.
High-capacity power transformer and power section layout for highest quality sound
The heavy-duty class, high-capacity power transformer is installed in the center and fixed with a 5-mm thick steel base plate on the bottom chassis. Also, the entire body is supported at three points on Esoteric original pinpoint feet* to reduce vibration and maximize high rigidity. Each component of this integrated amplifier incorporates the housing design and know-how applied for the K series (Super Audio CD/CD Player K-01 and K-03). Esoteric has meticulously pursued high sound quality and functionality up to the point of the placement of each component. Esoteric has paid a lot of attention to details, even in the unseen inner portions of this amazingly heavyweight, 31 kg (68.3 lbs.) integrated amplifier model I-03.
* Patent 4075477
Bold and delicately sleek round body form
|Like the K series, this integrated amplifier has inherited the round form design of Esoteric flagship models. Thick aluminum material has been used for the front, top, side panels and front corners. The preamplifier volume control and input selector have been machined from large-size aluminum blocks. Precisely tooled, rounded ergonomic design offer both a sleek appearance combined with an ideal balance of operational control.
|Rated output power||180 W + 180 W (8 Ω)
240 W + 240 W (6 Ω)
300 W + 300 W (4 Ω)
|Maximum output power||250 W + 250 W (8 Ω)
320 W + 320 W (6 Ω)
380 W + 380 W (4 Ω)
|Total harmonic distortion||0.03 % (1 kHz, 6 Ω)|
|Frequency response||5 Hz - 70 kHz (+1 dB, -3 dB, 6 Ω)|
|Signal-to-noise ratio (S/N)||110 dB (JEITA)|
|Minimum required impedance||4 Ω|
|Speaker output terminals||Binding posts x 1 stereo|
|Analog audio inputs|
|Jacks||RCA jacks x 3 stereo|
|RCA2: can be connected to an AV-amplifer's pre-output|
|RCA3: can be switched among LINE, PHONO MM and PHONO MC|
|XLR jacks x 2 stereo|
|Input impedance||LINE: 100 kΩ / PHONO MM: 47 kΩ / PHONO MC: 100 Ω|
|Analog audio outputs|
|Jacks||RCA jacks x 1 stereo|
|Output impedance||470 Ω|
|Power supply||AC 230V 50Hz
AC 120V 60Hz
AC 220V 60Hz
|Power consumption||280 W|
|External dimensions (W x H x D)||445 x 162 x 468 mm
(17 1/2" x 6 3/8" x 18 3/8" )
|Weight||31 kg (68 lb)|
- Điện tử Nam Phú luôn mang đến cho khách hàng các sản phẩm chính hãng với mức giá tốt nhất thị trường
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