DeEsser Mk2

The original – redesigned.

The SPL DeEsser is unique – and has been since 1996. The Auto Dynamic DeEsser removes undesired sibilant frequencies in a simple and musical way, cancelling out S-sounds without affecting the natural character or timbre of the voice.

The newest generation of the DeEsser Mk2 features the same processing qualities as its predecessor, but comes in a new design and has an even better feel due to the solid aluminum knobs. The DeEsser Mk2 offers two mono DeEssers in one 19″ device.

Auto-Dynamic DeEsser

SPL DeEsser – the revolution of S-sound reduction.

The DeEsser uses a unique technology to reduce sibiliance in a mix or on vocal tracks.
It automatically detects and hones in on the sibilant frequencies leaving neighboring
frequencies unaffected. These S‑sounds are mixed back into the main signal phase-inverted to cancel out the sibilance. The result is a sound-neutral, inconspicuous and extremely effective process.
Even at high S‑Reduction values the de-essing has an egligible effect on the character and timbre of the voice.


The S‑Reduction control adjusts the intensity of the S‑sound reduction.

In practice, S‑Reduction settings between -2 dB and -8 dB achieve the best results for most applications.


The S-Reduction LED display visualizes the intensity of the S‑sound reduction between 0 dB and -20 dB in 2 dB steps.


The Auto switch activates the Auto Dynamic function. This automatically adjusts the threshold if the input level fluctuates due to varying distance to the microphone which leads to fluctuating input levels.

With Auto-Threshold engaged, the de-essing intensity remains constant at the value you set with the S‑Reduction control. This is a great help not only for inexperienced voice-over artists, but also in live situations.


The Female switch is used to adapt to the voice characteristics:
When the switch is pressed, the Female mode is selected. The automatic S‑sound detection now reacts more intensively to higher-frequency S‑sounds. The unpressed switch position selects the Male mode to adapt the S‑sound detection to male voice characteristics. Lower-frequency S‑sounds are processed.

In addition, the mid frequency of the S‑sound detection is increased from Male mode to Female mode. For male voices the mid frequency is at about 6 kHz, for female voices at just under 7 kHz.

Nevertheless, you should not necessarily choose the Male position for male voices and the Female position for females. Always listen to the pitch and tone of the S‑sound and try both positions.


The On switch, activates or deactivates the respective channel.
This allows you to quickly switch between processed
and unprocessed signal.

To minimize switching noises, switching is performed directly after
the balanced inputs and outputs. This relay hard bypass circuitry also provides immediate redirection of inputs to outputs in the event of a power fault on the primary or secondary side of the power supply, or if the device is powered off.

How does a traditional
DeEsser work?

Traditional DeEssers work with compressors; they can therefore also be found in combination
devices with compressors/limiters. In addition to the threshold control, which determines the level at which de-essing starts, you will also find a frequency control, which determines the center
frequency at which S‑sounds are to be searched for. The bandwidth of the processing is usually
up to two octaves. When an S‑sound appears, the entire bandwidth is always compressed, which leads to undesirable side effects such as twanging or lisping.

How does the SPL Auto
Dynamic DeEsser work?

The Auto-Dynamic DeEsser has a new circuit technology that automatically adjusts to the S‑frequencies and narrows the bandwidth so that only the range of the S‑sound is processed and all neighboring frequencies remain untouched. The frequency band determined in this way is mixed back to the original signal in phase-inverted form, whereby the S‑sound is acoustically removed. The result is a sound-neutral, unobtrusive, but extremely effective way of working. De‑essing now has very little negative influence on the timbre of the voice; side effects such as twanging or lisping do not occur. In addition, time-consuming readjustment of the frequency settings is no longer necessary. The SPL Auto-Dynamic DeEsser combines efficiency with sound neutrality. By the way, you can also soften hard cymbal sounds or snares perfectly with the DeEsser Mk2.

Further advantages of
the Auto-Dynamic function

DeEssers with conventional compressor technology work more intensively with a decreasing
distance to the microphone. On the other hand, the DeEssing becomes weaker with an
increasing distance to the microphone. A compressor/limiter is usually used after the DeEsser to compensate level fluctuations. However, due to the different de-essing the compressor/limiter reacts wrong.

When the distance to the microphone is increased, the compressor/limiter reacts to the S-sounds that reappear. Not only the de-essing changes the sound, but also the compressor/limiter
negatively influences the sound image by its readjustment.

Thanks to the Auto-Dynamic function of the DeEsser Mk2, these problems are eliminated.
A control circuit monitors the input level and automatically adjusts the threshold. A following compressor/limiter reacts accordingly more accurately and with less coloration.

Inputs and outputs

The two channels of the De-Esser are equipped with Neutrik XLR sockets with gold-plated contacts. The signal transmission is electronically balanced at a nominal level of +6 dB.

Looks great, feels great –
and lasts for a lifetime

The DeEsser Mk2 has a 4 mm thick, black anodized aluminum front panel and aluminum knobs milled from solid. The housing is made of high-quality steel and is powder-coated in elegant black.

Sounds good

With all SPL devices we develop not only according to plan, but also by ear. Many important components are installed on the circuit boards using Through-hole technology. This way we can ensure that we can use the best sounding components.

Home is where the heart is

That’s why we manufacture all devices in our own production facility in Niederkrüchten on the Lower Rhine, Germany.


(predecessor De-Esser)
Radio World
Audio Professional
Release Time

Other Processing Products

Mastering M/S Processor
Mastering Compressor
Mastering Equalizer
Passive Mastering Equalizer
Vitalizer Mk3-T
Program Equalizer
Power Soak
Transient Designer 500
Dual-Band De-Esser 500
Stereo Image Bigger Maker
Tube Vitalizer
Program Equalizer
Transient Designer 4 Mk2
Dynamics Processor



Analog inputs & outputs; XLR & TRS Jack (balanced)

Maximum input and output gain
21 dBu
Input impedance
Output impedance
100 Ω
Common mode rejection (1 kHz)
> 80 dB
Frequency range (-3 dB)
10 Hz -100 kHz
THD + N (0 dBu, 10 Hz – 22 kHz)
-90 dB
Crosstalk (1 kHz)
-90 dB
Noise (A-weighted)
-97 dBu
Dynamic range
118 dB

Internal Linear Power Supply with Toroidal Transformer

Operating voltage for analog audio
15 V
Operating voltage for relays and LEDs
12 V

Mains Power Supply

Mains voltage (selectable)
230 V AC / 50; 115 V AC / 60 Hz
Fuse for 230 V
T 200 mA
Fuse for 115 V
T 400 mA
Power consumption
max. 15 W

Dimensions & Weight

W x H x D (width x height x depth)
482 x 44 x 237 mm
19 x 1.73 x 9.33 inch
Unit weight
3.3 kg
7.27 lbs
Shipping weight (incl. packaging)
4.45 kg
9.81 lbs

Reference: 0 dBu = 0,775V. All specifications are subject to change without notice.


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What does it actually mean …

In Stock!

The product is in stock in our warehouse in Niederkrüchten, Germany, and will be shipped the same or next working day.

We process the orders after receipt of the order and update the stock in the online shop regularly. If the product is no longer available at short notice due to high order volume, you naturally have the right to withdraw from the purchase (see Right of Withdrawal).

In any case, you will receive an e-mail with details of the delivery and the estimated delivery time.

Available soon!

The product is not in stock in our warehouse in Niederkrüchten, Germany. Usually it will be available again within 5 working days.

In any case, you will receive an e-mail with the details of the delivery and the estimated delivery time.

Of course you have the right to withdraw from your purchase (see Right of Withdrawal).

Currently unavailable.

This product is currently sold out and unavailable.

Was bedeutet eigentlich …

Auf Lager!

Das Produkt ist in unserem Lager Niederkrüchten vorrätig und wird noch am selben oder nächsten Werktag versendet.

Wir arbeiten die Bestellungen nach Bestelleingang ab und aktualisieren den Bestand im Online-Shop regelmäßig. Falls das Produkt wegen hohem Bestellaufkommens kurzfristig nicht mehr verfügbar ist, hast du selbstverständlich das Recht, vom Kauf zurückzutreten (siehe Widerrufbelehrung).

In jeden Fall erhältst du eine E-Mail mit den Einzelheiten der Lieferung und der voraussichtlichen Lieferzeit.

Bald verfügbar!

Das Produkt ist in unserem Lager Niederkrüchten nicht vorrätig. Gewöhnlich ist es innerhalb von 5 Werktagen wieder verfügbar.

Auf jeden Fall erhältst du eine E-Mail mit den Einzelheiten der Lieferung und der voraussichtlichen Lieferzeit.

Selbstverständlich hast du das Recht, vom Kauf zurückzutreten (siehe Widerrufbelehrung).

Zur Zeit nicht verfügbar.

Dieses Produkt ist derzeit ausverkauft und nicht verfügbar.

Product Condition


Brand-new product from the current product portfolio.


Demo, exhibit or return item.
In original packaging, incl. manuals and full warranty.
Only slight to no signs of use.


Demo, exhibit or return item.
In original packaging, incl. manuals and legal warranty.
In some cases clear signs of use, which are documented in photos.


"New Old Stock"
After discontinuation of a product still available new products with full warranty.


Due to Covid19 there are no events scheduled at this time.


Aufgrund von Covid19 sind derzeit keine Events geplant.