This website uses a stylesheet.
The display will be different because the browser you are using does not support stylesheets, but information can still be used without any problem.



Powerful bass sound thanks to strong enclosures.

In addition to using highly rigid MDF*1 for the enclosure and bass reflex duct parts, the woofer units are directly mounted on extremely thick MDF inner baffles (5-inch/6-inch: max 30mm thickness, 8-inch: max 33mm thickness), which limits unnecessary resonance and produces a powerful bass sound.


Air flow in bass reflex duct optimized with “Groove Technology”

As well as a front bass reflex system that outputs powerful bass from the front of the speaker, grooves are installed in the bass reflex duct parts to improve air flow with “Groove Technology” that smoothly emits low frequency sounds from the front of the speaker. This makes it possible to output strong drum kick and bass sounds. The design also features other details making these speakers ideal for dance music, including round processing inside the ducts to reduce noise.

Groove技術 Groove技術によるバスレフダクト部の空気の流れ(イメージ)

Convex diffuser installed in tweeters with “DECO*2” technology, producing sound with wide response

Tweeters have been installed with convex diffusers using “DECO” technology from the TAD Labs*3 “TAD Pro TSM-2201-LR” monitor speaker as used in professional studios. The convex diffuser partitions mid-range sound into left, right and upper regions, which ensures a wide sweet spot and 3D stereo. The diffuser also features an arc-shaped white illumination in the style of an expanse of sound.

凸形状 ディフューザー(DECO技術) トゥイーター部の音の広がり(イメージ)

Driver design for high response and powerful music performance

High response and powerful music performance is achieved with woofer cones made from aramid fiber, which is lightweight and highly rigid, and strong magnetic circuits using large-aperture magnets. Soft dome tweeters use magnetic fluid in the magnetic circuit, which results in balanced, wide-reaching high frequencies.

Newly designed “Class AB bi-amp” plays all instruments with excellent balance

Well-balanced frequency response across all regions is achieved thanks to a newly design “Class AB bi-amps” adopted in the tweeter and woofer units.

Other features

  • ・Equipped with a wide range of input ports (XLR, TRS phone, RCA).
  • ・Features environmentally friendly “Auto Standby” mode, which reduces power consumption by switching power to stand-by if there is no input over a set period of time.

Main specifications

FormatBi-amp 2-way bass reflex active monitor speaker
Tweeter1-inch soft dome tweeter
Woofer6-inch aramid fiber woofer
Frequency response45 Hz~20 kHz
Maximum SPL 113 dB
Amplifier output (rated output) Class A/B bi-amp 125W
LF:90 W (50 W)
HF:35 W (20 W)
Input ports
Balanced inputs
XLR×1、TRS(1/4 inch PHONE) × 1
Input ports
Unbalanced inputs
RCA × 1
Input impedance 10kΩ
Level control -∞dB ~ +6dB
HF level adjust -2dB / -1dB / 0dB / +1dB
Power consumption (Standby mode) 140 W
(less than 0.5 W)
Maximum external dimensions (W×H×D) 228 mm × 342 mm × 295 mm
Unit weight8.5 kg
Accessories includedPower cord
User’s manual


  • Manuals

Product lineup

  • S-DJ50X
  • S-DJ80X
  • *1 MDF: abbreviation of Medium Density Fiberboard, a type of fiberboard that uses wood fiber as its raw material.
  • *2 DECO: abbreviation of Diffusion Effectual Convexity by Olson. A technology for improved directionality developed as a proprietary technology by TAD, Inc. based on a technique conceived by H. Olson in the 1950s.
  • *3 TAD Labs: abbreviation of Technical Audio Devices Laboratories, Inc. Pioneer began selling TAD (Technical Audio Devices) branded products in 1978, and these have been adopted by many studios around the world as professional speaker units, earning critical acclaim in the process.