Midfield Monitor
TEC Award
TEC Award
Gear of the Year
Gear of the Year
Audio Media
Highly Recommended
ADAM Audio S3X-H Studio Monitor


The S3X-H is the most successful model of the SX-Series as the highly evolved successor of our very popular S3A. Designed as a three-way speaker, it includes two horizontally arranged 7.5″ bass drivers, one 4.5″ midrange speaker and the characteristic ADAM X-ART tweeter. The cone woofers are driven by three powerful 250 Watt PWM amplifiers that enable the S3X-H to provide amazing dynamic bass performance. Even if they are classified as midfield monitors due to their power capabilities, S3X-Hs are also ideal for reproducing spatial depth at shorter listening distances.

The top-class X-ART driver produces brilliant and transparent high frequencies. The three-dimensional spatial imaging and rapid, powerful midrange/bass response make the S3X-H extremely musical, dynamic and colorful. The S3X-H also provides clear representation of minimal changes in your mix and the corresponding sonic consequences. Long working sessions with the S3X-H are not fatiguing to the ear. Quite the contrary: the authenticity and brightness of this exceptional monitor enhances the creative process of musicians and producers around the world.

Optional: External Amplifier Unit EA-SX

For the models S2X, S3X, S4X and S5X we offer the option of an external amp unit in order to make flush mounting of these monitors easier.

German Handmade Precision X-ART Tweeter

2 x 7.5“ and 1 x 4.5" Woofer (HexaCone)

Amp. Power RMS / Music: 800 W / 1150 W

Frequency Response: 32Hz - 50kHz

Max. SPL per pair at 1 m: ≥126 dB


ADAM Audio monitors have earned a worldwide reputation as the preeminent tool for sound engineers based on technological innovations that we’ve established in the field of loudspeaker technology.


"The S3X-H convinces all along the line. ADAMs new member is all but just an improvement of a successful monitor. With a new loudspeaker design and painstaking tuning it is a first-class control tool in any studio. From now on, the monitor reference in the Professional Audio Studio is called S3X-H."
Raphael Hornbruch
Professional Audio
"Anyone seeking an uncompromised solution to studio monitoring should add these to your short list of products to consider."
George Petersen
"These are reference monitors, and as they make their way into studios they will become part of the standard called ‘music production’. The S3X-H radiates sound into the room with depth, accuracy, and clarity in the way you need it to be with comfort and ease. These are monitors that need to be heard."
Audio Media
"The accuracy, spectral definition, stereo imaging, increased output power, and improved overall design of the S3X-H make it a perfectly reliable active monitor that can certainly find its place in any serious setup."
"A reference monitor in all respects!"
Keyboards Recording

ADAM S3X-H in use

Press Reviews

Sonicscoop [English]
Audio Media [English]
PDF (613 KB)
Professional Audio [German]
PDF (830 KB)
Mix [English]
PDF (76 KB)
Amazona [German]
PDF (116 KB)
Audiofanzine [English]

Features & Benefits

Product Feature
Benefit to the customer
X-ART tweeter, handmade in Berlin
  • Allows longer operation with fewer signs of fatigue
  • Their breakup is prevented by the folded diaphragms, distortions are effectively reduced to a minimum
  • Advanced dynamic range due to acoustically effective diaphragm surface that is 2.5 times bigger (compared to a classic tweeter according to the piston principle)
The air velocity ratio of 4:1 during the sound generation by folded X-ART membrane

Direct, fast response in the high-range even with complex transients

Ultra-light but extremely dimensionally stable woofer material (HexaCone)

Excellent transient response even at high sound levels without breakup of the diaphragm

Horizontal 3-way system with 2 x 7.5" woofers and 1 x 4.5” midrange

Very high resolution of the stereo image and extremely wide stereo base

Spacious bass reflex ports on the front
  • Bass reproduction with very low compression
  • Allows positioning close to walls
Highly efficient PWM amplifier for the woofers coupled with an A/B amplifier for X-ART tweeter

Low-distortion amplification at both low and high volume levels

Linear frequency response of 32 Hz to 50 kHz

Unbiased reproduction in a wide frequency band

Maximum peak sound pressure per pair in 1 m ≥ 126 dB

Powerful, compression-free sound reproduction even at very high sound levels

Room acoustic adjustments via the SX Panel

Allows optimal adaptation to acoustically difficult listening environments or individual preferences

Analog XLR input

Optimized for balanced line signals

Directional sound radiation in vertical plane

Reduction of early reflections on the surfaces of, e.g. mixing consoles, desks, etc.

2 years warranty with optional extension to 3 years with the registration of the product

Full repair service if required for 5 years

Technical Data


Basket Ø7.5" (186 mm)
Voice Coil Ø2" (50 mm)
Cone MaterialHexaCone


Basket Ø4.5" (116 mm)
Voice Coil Ø1" (25 mm)
Cone MaterialHexaCone


Diaphragm Area4 inch² (2420 mm²)
Equiv. Diaphragm Ø2" (56 mm)
Velocity Transform Ratio4:1
Diaphragm Weight0.17 g

Built-in Amplifiers

Amp. Power RMS / Music2 x 250 W / 350 W
Amp. Power RMS / Music250 W / 350 W
Amp. Power RMS / Music50 W / 100 W

Control Panel

Input Sensitivity (coarse)-20 to +8 dB (4 dB steps)
Input Sensitivity (fine)-1.5 to +2 dB (0.5 dB steps)
EQ 80 Hz0 to +6 dB (1 dB steps)
High Shelf EQ > 6 kHz±4 dB (1 dB steps)
Low Shelf EQ < 150 Hz±4 dB (1 dB steps)
Tweeter Gain±2 dB (0.5 dB steps)

Input Connectors

Digital (optional)AES/EBU / SPDIF / word clock

General Data

Frequency Response32 Hz - 50 kHz
THD > 80 Hz≤0.6 %
Max. SPL with sine wave acoustic 100 Hz to 3 kHz at 1 m≥116 dB
Max. SPL per pair at 1 m≥126 dB
Crossover Frequencies350 / 2800 Hz
Input Impedance10 kOhm
Weight43.2 lb (19,6 kg)
Magnetically ShieldedNo
Height x Width x Depth11" (280 mm) x 21" (530 mm) x 12.5" (320 mm)
Warranty5 years (2 years warranty plus 3 years optional with product registration)
Delivery ContentsPower cord, manual

Additional information

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