Luxman E-07 Phono Equalizer

Luxman E-07 Phono Stage

The Luxman E-07 is an all-solid-state phono equalizer amplifier designed to extract the full musical potential from both MM and MC cartridges. Built to coincide with LUXMAN's 100th anniversary in 2025, it incorporates built-in MC step-up transformers, a balanced XLR input for MC cartridges, and a non-feedback RIAA equalization circuit anchored by a four-parallel FET input stage. It is LUXMAN's most fully featured standalone phono stage to date, conceived to serve as the foundation of a serious analog front end.

Position Within the LUXMAN Lineup

The E-07 occupies the top of LUXMAN's phono stage lineup and is designed to integrate visually and sonically with the company's separate and integrated amplifier series. Its full-width chassis matches the footprint of LUXMAN's amplifier components, and the blasted white finish front panel aligns with the aesthetic of the Centennial series. The E-07 succeeds earlier LUXMAN phono stages in both specification and ambition, incorporating built-in MC transformer gain, balanced input capability, and an independent triple power supply — features previously requiring external solutions or reserved for higher-tier systems.

Non-Feedback RIAA Equalization Circuit

The E-07 uses a non-feedback type phono equalizer circuit (NF-type) with RIAA equalization applied through a passive network. At the heart of the phono stage, the primary gain stage employs four FET devices connected in parallel, a topology that reduces thermal noise by a factor proportional to the number of paralleled devices. This approach achieves a very low noise floor while preserving the natural, uncolored character associated with non-feedback circuit design. RIAA response accuracy is rated at ±0.1 dB from 20 Hz to 20 kHz for MM operation and ±0.3 dB for MC operation. Total harmonic distortion is measured at 0.003%.

The S/N ratio (IHF-A) is 88 dB for MM, 81 dB for MC-H, and 78 dB for MC-L, and channel separation is rated at 80 dB or more — figures that reflect both the circuit quality and the care taken to isolate left and right signal paths throughout the design.

Built-In MC Step-Up Transformers

Rather than relying on transistor gain alone for MC cartridges, the E-07 incorporates four dedicated MC step-up transformers using super permalloy cores, a material chosen for its exceptional responsiveness to low-level signals. The four units are arranged as two independent pairs — one per channel, each pair offering a Low and High impedance selection. This means the transformer's winding ratio and therefore its gain stage can be matched to the impedance group of the cartridge in use, rather than applying a single fixed gain across all MC types.

Gain figures are 57 dB for MC-H and 66 dB for MC-L, compared to 38 dB for MM. Input sensitivity is 0.37 mV for MC-H and 0.12 mV for MC-L, accommodating a wide range of MC output levels. The transformer configuration also supports balanced differential input from MC cartridges directly via XLR, which preserves the full differential signal without the energy loss that an unbalanced connection would impose.

Inputs, Outputs, and Load Adjustment

The E-07 provides three phono inputs: two unbalanced RCA pairs and one balanced XLR pair. Each phono input has its own dedicated ground terminal connected to that circuit's reference point, as well as a traditional frame ground terminal connected to the main chassis — four grounding terminals in total, machined from solid brass with a gold-plated finish. This arrangement minimizes hum and interference at the input stage and ensures a clean ground reference for each cartridge connection. Two additional line-level inputs and two line-level outputs are also provided on the rear panel, allowing the E-07 to serve as a signal routing point within a larger system. Phono outputs are available in both unbalanced RCA and balanced XLR format, with output impedance rated at 300 Ω unbalanced and 600 Ω balanced.

MC cartridge load impedance is adjustable via a six-position rotary selector on the front panel: 4.7, 10, 40, 100, 300, and 1,000 ohms. This range covers virtually all MC cartridges on the market, from low-impedance designs that prefer a 4.7 or 10 ohm load to higher-output types that work best at 100 ohms or above. MM cartridge load impedance and load capacitance are set via switches on the rear panel: load impedance options are 34, 47, 56, and 100 kΩ, while load capacitance options are 0, 100, 220, and 320 pF. The ability to tune both parameters independently allows the E-07 to be optimized for the specific electrical characteristics of the cartridge in use.

Triple Independent Power Supply

The E-07 uses three separate power transformers: one dedicated to the left channel amplification circuitry, one to the right channel, and a third for indicator and relay driver circuits. By isolating each section's power supply, the design prevents load fluctuations in one section from affecting another. Each channel's supply is further regulated and filtered by large-value block capacitors rated at 10,000 µF, with five capacitors across the supply totaling 50,000 µF. This level of power supply provision is more typical of a power amplifier than a phono stage, and it reflects LUXMAN's emphasis on a stable, high-current supply as a prerequisite for low-noise performance at the micro-volt signal levels any serious phono stage must handle.

Petal-Shaped Grounding Structure and PCB Design

To address the ground integrity challenges that arise when handling signals at the millivolt and microvolt scale, LUXMAN developed a proprietary Petal-Shaped Grounding Structure (PGS) for the E-07. This topology consolidates each circuit's signal reference point to a single central location, with ultra-thick steel plates radiating outward in a radial pattern to connect each section at identical impedance and uniform distance. The result is a low-impedance, consistent ground reference across the entire circuit. PCB traces follow LUXMAN's rounded pattern routing to promote smooth current flow and minimize signal reflections at audio frequencies.

Chassis, Vibration Control, and Build Quality

The E-07 chassis uses a loopless construction to minimize ground impedance and magnetic interference between sections. The base of the chassis consists of two copper plates totaling 3.6 mm in thickness, which increases ground mass, lowers the unit's center of gravity, and significantly improves chassis rigidity compared to a conventional steel or aluminum base. Density-gradient cast-iron insulator feet are fitted at each corner to isolate the unit from surface-borne vibrations that could couple into the signal path.

Internal wiring throughout uses OFC (oxygen-free copper) cable with precise spiral-wrapped shielding and unplated copper cores. The AC inlet is gold-plated and uses a reversed mounting orientation to support the weight of heavy power cables, maintaining a stable mechanical connection at the mains entry point.

Convenience Features

The E-07 includes an articulator function that demagnetizes the cartridge and MC step-up transformer using the playback signal, counteracting the gradual magnetization that can accumulate during extended use. A low-cut switch suppresses subsonic low-frequency artifacts introduced by record warps, protecting woofer cones from unnecessary excursion. A mono mode switch enables playback of mono records by summing the two channels, while a phase inversion switch on the front panel reverses the polarity of the balanced outputs to match the requirements of the connected downstream equipment.

The Luxman E-07 is a comprehensive phono equalizer amplifier and reference-class phono stage that addresses every variable in the cartridge-to-preamp interface, from transformer gain and load matching to power supply isolation and ground management, making it a capable foundation for any serious analog playback system.