We have tested the Genelec 8331A studio monitor!

The Finnish brand Genelec is renowned for its precision sound and premium build quality. The Genelec 8331 active studio monitor is considered a heavyweight in its class—despite its compact dimensions. Weighing 6.7 kg, it houses three separate drivers, each powered by its own dedicated amplifier, yet it remains the smallest model in the “The Ones” series.

The speaker’s nominal frequency response ranges from 58 Hz to 20 kHz, providing accurate reproduction across the core frequency spectrum.

At the heart of the system is an oval-shaped bass-reflex subwoofer, built with Genelec’s Acoustically Concealed Woofer (ACW) technology. It features upper and lower ports for optimized airflow and bass control. Hidden behind the front panel, you’ll find a 90 mm coaxial midrange driver and a 19 mm coaxial tweeter. This innovative arrangement is part of Genelec’s Minimum Diffraction Coaxial (MDC) Driver Technology, which minimizes acoustic distortion and enhances phase coherence for pinpoint imaging.

3D Sound absorbing panels – Size: 60x60x10cm 3kg

111 € +Vat
Cubic Sound Diffuser 60x60x10

167 € +Vat

Directivity Control Waveguide (DCW) function

Coaxial Design & Acoustic Innovations

The main advantage of the three-way coaxial design is that all sound emanates from a single acoustic point, significantly reducing phase distortion and resulting in a wider and more coherent stereo image. While the bass drivers are located at the front of the enclosure, they are acoustically concealed—their sound exits through the upper and lower openings on the front panel. This front surface also functions as an integrated waveguide.

Traditionally, this type of design presents limitations in frequency extension and maximum SPL, but according to the manufacturer, the Genelec 8331 successfully overcomes these compromises.

What looks like a simple dome guard at first glance is, in fact, an advanced wave-controlling baffle that spans the entire front panel. This structure is part of Genelec’s DCW (Directivity Control Waveguide), which, combined with the Minimum Diffraction Enclosure (MDE) design, virtually eliminates unwanted resonances and diffraction artifacts.

Thanks to the coaxial driver configuration, the 8331 provides exceptionally stable and detailed stereo imaging, even at distances as short as 40 cm, making it ideal for nearfield monitoring setups.

Software and Hardware

Coaxial Design & Acoustic Innovations

The key advantage of the three-way coaxial design is that all sound originates from a single acoustic point, which significantly reduces phase distortion and results in a wider, more coherent stereo image. Though the bass drivers are mounted on the front of the enclosure, they remain acoustically concealed, with sound exiting through the upper and lower openings in the front panel. This panel also serves as an integrated waveguide for directing sound precisely.

Historically, coaxial designs have come with trade-offs—particularly in terms of frequency range and maximum sound pressure level (SPL). However, Genelec claims the 8331 overcomes these limitations, delivering full-range performance without compromise.

What might appear to be a protective dome is actually a sophisticated soundwave-guiding baffle that spans the entire front panel. This is part of Genelec’s DCW (Directivity Control Waveguide), and when combined with the Minimum Diffraction Enclosure (MDE), it works to minimize resonances and eliminate diffraction-related artifacts.

Thanks to its coaxial driver configuration, the 8331 offers exceptionally stable, sharp, and precise stereo imaging, even at close distances—as little as 40 cm—making it a perfect fit for critical nearfield monitoring in professional studio environments.

Software and Hardware

The Genelec 8331 is part of the brand’s SAM (Smart Active Monitor) series, which features intelligent monitoring and calibration technologies. It is fully compatible with Genelec AutoCal, an automatic room calibration system that is both extremely easy to install and intuitive to use.

Using the Genelec Loudspeaker Manager (GLM) software, users can perform precise calibration of the speaker system to match the room’s acoustic characteristics. The GLM also allows for fine-tuning of tonal balance, offering a high degree of control for critical listening environments.

In terms of amplification:

The subwoofer is powered by a 72-watt amplifier
The midrange driver uses a 36-watt amplifier
The tweeter is driven by a 25-watt amplifier

For connectivity, the 8331 supports both analog and digital audio inputs, including:

Analog balanced XLR input
Digital AES/EBU balanced input

This flexible I/O configuration ensures seamless integration with modern studio equipment, whether you’re working in a fully digital or hybrid setup.

The DIP switches on the back can be used to adjust the frequency responses as well as the low and high ranges. If you want to use the speakers alone, you will need to connect a source to make the volume and other settings. The Genelec Loud Speaker Manager is a monitoring software for the settings of the device itself, and these settings are controlled by the GLM software on your computer. GLM hardware and software work extremely well together. You can connect the hardware to your computer via USB, and you can also find an input for the calibration microphone. Calibration of the EQ software is extremely fast, with a volume slider, mute, and EQ bypass buttons displayed on the control screen.

The Genelec speakers feature a rounded, sleek design, the exterior of the 8331 monitor was designed by Harri Koskinen.The company has been making speaker enclosures from recycled aluminium since 1996. The housing is quite solid and stable.

The maximum sound pressure level (SPL) of the device is 104 dB. The SAM system, the GLM software and the GLM user kit together allow for extremely precise settings. The GLM also includes a user-ready adapter, measuring microphone, USB cable and network cable. The DIP switches on the back allow you to make manual adjustments, and the upper and lower slots are used to adjust the bass tones. The reflex port system is a long curved tube inside the speaker, the purpose of which is to reduce the resonance and increase the detail and intensity of the deep sounds.

Little but loud

We tested the Genelec speakers in a relatively small studio. They were placed about three meters from the listening position – it is worth to mention that they can also be used as close-up monitors. Despite the small size, the monitors were extremely loud, produced muscular basses and good dynamics, the sound was balanced, and the stereo sounding accurate, clear, full, and detailed.

The acoustic treatment of the studio is in progress, consequently the sound was not completely perfect. Without calibration, certain sound frequencies pounded too loudly in this room without proper acoustic design. Room acoustics calibration software can be extremely useful when used in a studio with ideal acoustic conditions. These software primarily measure sound pressure values and are unable to correct acoustic issues such as echoes or inadequate reverberation time. If you are really looking for the perfect solution, be sure to use appropriate acoustic elements that are designed for the room. In a room treated with diffusers and sound-absorbing panels, EQ calibration programs are really useful, and flawless sound can be achieved as a result of fine tuning.

We tried the monitor while listening to stereo music. We first put on a song by Pink Who knew. Everything was absolutely fine with the stereo sound, we experienced the right multidimensional stage picture, the reverberation time was absolutely acceptable, the sound was precise and detailed, the dynamics were also absolutely perfect. Genelec 8331 were an excellent choice to serve as reference monitors. Jennifer Lopez’s hit In the morning followed. The momentum and detail, as well as the accuracy were adequate akin this time, we couldn’t really find any issues in connection with the sound.

Sound absorber leather membrane

Price range: 60 € through 165 € +Vat
Column Diffusers

Price range: 218 € through 247 € +Vat

Verdict

Despite its compact size, the Genelec 8331 studio monitor delivers astonishingly powerful and detailed sound. During our testing, we experienced tight, clear bass, a well-balanced midrange, and a precise stereo image with an immersive 3D soundstage.

The built-in EQ settings and AutoCal calibration system proved especially valuable—particularly in untreated studio environments, where room correction is critical. The combination of intelligent monitoring technology, high-quality components, and refined acoustic design makes the 8331 an outstanding choice for professional audio production, even in limited spaces.

Thanks to its coaxial driver design, the Genelec 8331 can be positioned either vertically or horizontally, offering valuable flexibility in a variety of studio setups. We especially recommend this model for smaller studios, as it performs exceptionally well even at close distances, providing full-range sound from as near as 40 cm.

If traditional acoustic treatment is challenging due to limited floor space, the 8331’s intelligent calibration system and controlled directivity make it an optimal solution for managing room-related issues.

We encountered very few downsides during our testing. However, the high price point may be a barrier for some. While the 8331 excels in professional studio environments, we would not recommend it for casual home use—more affordable and purpose-specific alternatives are better suited for domestic setups.Thanks to its coaxial driver design, the Genelec 8331 can be positioned either vertically or horizontally, offering valuable flexibility in a variety of studio setups. We especially recommend this model for smaller studios, as it performs exceptionally well even at close distances, providing full-range sound from as near as 40 cm.

We have tested the Genelec 8331A studio monitor!