Since the launch of their SQ-5A vacuum tube integrated amplifier in 1961, Luxman have continued making vacuum tube amps without a break. They have produced many models that are highly valued as signature models and satisfied music lovers are enjoying them to this day, even several decades after their release. The CL-38uC and MQ-88uC combine Luxman's history of producing fine vacuum tube products and the traditional wisdom and skills gained along the way.

Due to their relatively simple circuitry, vacuum tube amplifiers are greatly affected by the quality of individual components, hence they utilise Luxman's own high-quality transformers and blocking capacitors. Further customisation comes in the form of Nichicon-made, high-voltage, metallised polypropylene film coupling capacitors, which have been introduced for their supple, natural tone. Improved audio quality has been realised by shortening the internal wiring.

The CL-38uC control amplifier and the MQ-88uC power amplifier are based on the latest technology and design, yet their exterior styling evokes the classic era of vacuum tube audio products. The CL-38uC is modeled on the CL-35, released in 1970, and the MQ-88uC is modeled on the MQ-60, released in 1969. A classic front panel design is both functional and beautiful, achieved through careful selection of knobs and lever switches. Listeners can enjoy these traditional design elements with their nostalgic charm while experiencing the benefits of contemporary, high-performance audio technology.

Each CL-38uC control amplifier and MQ-88uC power amplifier undergoes a rigorous 48-hour aging process after assembly to ensure optimal performance and stability. Luxman has chosen JJ Electronic (Slovakia) vacuum tubes for these models, prized for their reliability, long lifespan, and exceptional ability to operate efficiently under the high voltages and heat conditions typical of vacuum tube amplifiers. This careful selection and testing process guarantees consistent, high-quality sound for every unit.

The MQ-88uC uses JJ Electronic KT-88 output tubes, celebrated for delivering powerful, rich, and musical sound. Its triode configuration extends tube life while producing the transparent timbre vacuum tube enthusiasts prize. The amplifier’s paralleled first stage feeds a driver stage based on proven Mullard circuitry, and the final stage adopts a Mullard-compatible push-pull design, achieving 25 watts per channel into 4, 8, or 16 ohms with exceptionally low distortion—offering both classic warmth and modern precision.

The MQ-88uC has independent 4, 8 and 16 ohm speaker terminals to better match with and bring out the best abilities of any kind of speakers, allowing powerful music reproduction with very low distortion. The unit features a variable input (volume adjustable) mode in which the signal bypasses the input section, connecting a source device, such as a CD player, directly to the output section.

Output transformers play an important role in determining the sound quality and performance of a vacuum tube amp. Luxman's classic amplifier products featured OY15 type output transformers with die-cast aluminium housings. These have been redesigned and reproduced with the original shape. The power supply section features a highly stable EI type power transformer in tandem with custom designed blocking capacitors yielding steadfast sound quality and excellent drivability.

The main chassis of the MQ-88uC has a dark brown finish, different to the black finish of the MQ-88u. Luxman feel this finish better matches their products with wooden exterior cases. The hairline finished aluminum top panel and matt black aluminum die-cast power transformer housings make for a harmonious match, fine quality and beauty being important to their designs.