Luxman P-750u MARKII

Headphone Amplifier

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AVAILABILITY: N/A

Google translation from Japanese

P-750u MARKII headphone amplifier - A new standard for direct listening that has been reached through steady evolution.

With the P-1 released in 2003, Luxman pioneered the genre of high-end headphone amplifiers, and now the P-750u MARK II is the new extreme.

The P-750u MARK II is a flagship model based on the fully-balanced P-750u, which was highly acclaimed as the pinnacle of headphone amplifiers. is.

The P-750u MARK II is a new "reference" headphone amp that maximizes the real pleasure of direct listening and brings out the full potential of your headphones. Please sense the profound sound world bodily in your ear.

Proprietary amplification feedback circuit ODNF-u with improved distortion characteristics

Luxman's original high-quality sound amplification feedback circuit ODNF features fast initial slew rate, wide bandwidth, and low distortion by feeding back only the distortion component from the output of the amplifier circuit. The P-750u MARK II is equipped with the latest evolution version of ODNF, ODNF-u * , which maximizes the error detection accuracy of the auxiliary amplifier and greatly improves distortion characteristics . It achieves high-purity, free-flowing and dynamic sound quality over the entire frequency range, and achieves both the reality of sound and rich musical expression at a high level by accurately reproducing minute musical information. The output is 4W + 4W (8Ω) when connected unbalanced, and 8W + 8W (16Ω) when connected balanced. Designed to achieve high-grade direct listening, the impedance and efficiency of various headphones around the world. It has the drive ability to handle with a margin.

* ODNF-u is an abbreviation for Only Distortion Negative Feedback-ultimate.

Fine, high-purity volume control mechanism, electronically controlled attenuator LECUA

For headphone playback, where sound reaches both ears directly without going through the acoustic space of a room, the level deviation between left and right at low volumes and the difference in sound quality at different volume positions are more severe situations than general audio amplifiers. The P-750u MARK II is equipped with an original high-purity electronically controlled attenuator LECUA * that has achieved a significant reduction in size through a solid-state (IC) circuit configuration. The ideal level control mechanism minimizes left and right level deviation, reduces signal attenuation with little change in sound quality due to volume position, and enables highly accurate and smooth volume control. In addition, the LECUA centrally controls the 3-stage sensitivity switching according to the impedance and efficiency of the headphones used and the LR balance adjustment function. It unifies all the functions related to volume and minimizes the deterioration of sound quality.

* LECUA is an abbreviation for Luxman Electric Controlled Ultimate Attenuator.

Full-balanced drive and parallel unbalanced drive

The P-750u MARK II is a 2-channel stereo headphone amplifier, but it is equipped with 4 channels of ODNF-u, a high-quality sound amplification feedback circuit, with the same configuration. Balanced output by BTL (bridge) connection of the + and - of the music signal with an independent amplifier achieves left and right separation performance, improved localization, reduced intermodulation distortion, and improved power supply regulation. Maximize the capabilities of balanced headphones. In addition, when connected unbalanced, the 4-channel amplifier circuits are bundled in two on each side and driven in parallel, doubling the output current supply capacity. I got a dynamic sound. A sound stage with a rich expansiveness that can only be achieved with a balanced connection, and a powerful and outstanding image quality with a parallel unbalanced connection. Both modes have the highest output quality.

Abundant headphone output jacks

The headphone output of the P-750u MARKⅡ is equipped with an XLR (4-pin) terminal and an independent LR (3-pin) terminal for balanced output in addition to the standard (unbalanced) output terminal of φ6.3mm. In correspondence with various connection methods of various headphones, I can change it smoothly with a front button.

Enhanced power circuit

The P-750u MARK II uses the latest custom-made block capacitors in the power circuit to supply a strong and stable current to the amplifier circuit. The high-inertia power supply combined with the large-capacity OI type power transformer has been further enhanced.

Adoption of high-purity 6N internal wiring

The P-750u MARK II uses 6N (purity: 99.9999%) copper internal wiring material for the main parts of the circuit in order to further reduce the impedance of the signal path. Pursuing even higher-purity signal transmission, it was designed with the highest priority on sound quality over the details.

Switching and adjustment without increasing the number of contacts

The P-750u MARK II is equipped with a left/right volume balance adjustment function in addition to the main volume and 3-level sensitivity switching. All of them are simple systems that utilize the high-purity electronically controlled attenuator LECUA, so fine and accurate switching and adjustment are achieved without increasing the number of contacts.

Comes with the latest power cable

The P-750u MARKII comes with the latest standard power cable JPA-10000i. While maintaining the non-twisted structure, which is characterized by natural and relaxed sound quality, it has evolved into a slim type that realizes good handling while increasing the conductor diameter compared to conventional cables.

Housing design that satisfies the joy of ownership

The front panel of the P-750u MARK II is equipped with a silver mirror-plated logo plate engraved with red letters representing the MARK II. The difference in finish with the case, which is dressed in precise blaster white, creates an exquisite contrast and creates a profound feeling of the product.

Specifications

- Rated output: Unbalanced: 4W+4W (8Ω), 2W+2W (16Ω), 1W+1W (32Ω), 53mW+53mW (600Ω)

- Balanced: 8W+8W (16Ω), 4W+4W (32Ω), 213mW+213mW (600Ω)

- Input sensitivity / input impedance: Unbalanced: 1.0V/15kΩ, Balanced: 2.0V/40kΩ

- Frequency characteristic 20Hz - 20kHz (+0, -0.1dB): 10Hz - 170kHz (+0, -3.0dB)

- Total harmonic distortion Unbalanced: 0.003% (1kHz), Balanced: 0.002% (1kHz)

- S/N ratio (IHF-A): Unbalanced: 113dB, Balanced: 116dB

- Power-supply voltage: AC100V (50/60Hz)

- Power consumption: 42W (according to the Electrical Appliance and Material Safety Law), 27W (when there is no signal)

- External dimensions: 440 (width) x 92 (height) x 400 (depth) mm, Depth includes front knob 14mm and rear terminal 6mm

- Weight: 13.3kg (body), 16.1kg (standard packaging)

- Accessories: Power cable (JPA-10000i: with polarity mark)

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Luxman P-750u MARKII

Headphone Amplifier