MASTERING

PQ

Mastering Equalizer

This is a unique equalizer – for several reasons. It has two times five fully parametric filter bands, each of which can be switched between constant Q and proportional Q! And there’s sheer unlimited headroom and a very special kind of EQ sound – thanks to 120V technology.

The Filter Bands

Stepped Potentiometers

Recall of all settings is easy thanks to the potentiometers with 41 steps.

Cut/Boost & 1/4 Gain

Each filter band can be boosted or cut up to 20 dB.

If only minimal changes are required, the 1/4 Gain switch can be used to reduce the boost or cut range from +/-20 dB to +/-5 dB.

Frequencies

We have designed the frequency distribution to overlap widely between the bands, so that problematic frequencies can also be addressed with two bands.

LF
10 Hz – 330 Hz
LMF
33 Hz – 1 kHz
MF
128 Hz – 4.1 kHz
MHF
310 Hz – 10.2 kHz
HF
760 Hz – 24 kHz

Bandwidth Q

The bandwidth Q determines the steepness of bell characteristic. A small Q is a wide bandwidth and a high Q a narrow bandwidth.

The labeling of the scale is divided into two parts. The values with white background refer to the proportional Q mode and the values without background refer to the constant Q mode.

On/Off

The orange button is used to switch the individual filter band on and off. 

Constant & Proportional Q

The blue button is used to toggle the Q mode.

In constant Q mode, the amplitude is constant regardless of the selected bandwidth. This is ideal for eliminating interfering frequencies.

In proportional Q mode, the amplitude is proportional to the bandwidth. It decreases with increasing bandwidth and vice versa. At the smallest bandwidth setting, the maximum amplitude value is +/- 20 dB, while the maximum amplitude decreases to +/- 2.8 dB at the largest bandwidth setting. This control behavior simplifies sensitive, creative processing and is musically very useful, since high amplitudes become increasingly unusable with increasing bandwidth.

“The SPL PQ is an excellent mastering equalizer. With the PQ I can boost or cut frequencies very precisely without distorting the sound image – which is extremely cool in mastering, because you can work in such a clean way.”

“The 1/4 gain function, the detented knobs and the separate frequency bands make it a great tool in my mastering studio.”

“The PQ is my swiss army knife EQ from surgical to very musical adjustments. Its versatility is just stunning.”

“This EQ is probably the best EQ on the market. The precision you have to shape the sound to taste is great.”

The Center Section

Auto Bypass

For an objective evaluation of the edited music program, it makes sense not to switch between the original signal and the edited signal yourself, but to leave this to an automatic system.

It is also an advantage that, for an optimal evaluation of the processing, one does not have to move from the stereo center and can concentrate fully on the program.

With the help of the Interval control the switching time window can be determined. Turning it clockwise extends the time interval.

Link

The PQ is designed as a completely separate dual-mono, two-channel equalizer and can individually process two mono music programs simultaneously. It is of course also possible to edit a stereo program (left/right). If the Link function is activated, the functions LF, LMF, MF, MHF, HF On/Off and Con. Q/Prop.Q on both sides are switched together by the buttons on one side. This makes it possible to activate or deactivate a filter band or the Q characteristic on both sides of the equalizer with a single button operation.

In Link mode, the right side controls the left side as factory preset. However, this can be adapted to individual working habits. If the channel switch of a channel is pressed until it flashes, this channel controls the other side from that moment on.

Channel On/Off

The orange button switches the entire channel on and off.

Play Video
Jonathan Wyner from M-Works Mastering talks about PQ and IRON
Play Video
Bastian Neu, Developer of the PQ, gives his inside in proaudio.de (German)
Play Video
This video introduces you to the entire mastering series.

The 120V technology

The 120V technology is our reference technology. The 120V technology is unique in the world. It operates at a DC voltage of 120 volts. This is four times that of IC-based semiconductor op-amps.

The highest possible audio quality requires the highest possible audio operating voltage.

The 120V technology works with +/-60 V. To be able to handle such a high voltage, we have developed special proprietary operational amplifiers that can operate with a DC voltage of +/-60 V: the SPL 120V SUPRA operational amplifiers.
This high voltage would destroy conventional components and operational amplifiers.

By the way, the “120V” in the name of the technology has nothing to do with the local mains voltage from the mains power socket. This is about the operating voltage inside the device with which the audio signals are processed.

The mains voltage from the mains power socket is transformed to the required secondary voltage in the device’s internal linear power supply with toroidal transformer. Rectifiers convert this AC voltage into DC voltage required in the audio device.

The idea for SPL 120V technology and the SUPRA operational amplifier based on this technology were developed in the 1990s by SPL founder and chief developer Wolfgang Neumann.

With the goal of building the best mastering console ever, this basic technological philosophy then took shape for the first time – thus the SPL MMC1 Mastering Console for Galaxy Studios saw the light of day in 2000.

SPL MMC 1 in the „Galaxy Mastering Studios“
SPL MMC 1 in den „Wisseloord Studios“

The outstanding sonic and technical features quickly got around in the scene – so further orders were not long in coming.

Besides the MMC 1, another legendary product with 120V technology was created with the PQ, the “King of Parametric Equalizers”.

Since that time, 120V technology has been the foundation for all SPL premium products. Meanwhile, not only for mastering applications, but also for the, studio or hifi use.

SPL PQ – Modell 2050

What exactly is that?

And what does it do?

Good questions need good answers.

And that’s what the 120V technology video gives you.

Play Video

Reviews

Sonic Scoop
Studio Magazin
Professional Audio
Sound & Recording
Bonedo
Amazona
Audio Fader

Other Mastering Series Products

Mercury
Mercury
Mastering D/A Converter
Gemini
Gemini
Mastering M/S Processor
Hermes
Hermes
Mastering Router
MC16
MC16
16-channel Monitor Controller
DMC
DMC
Mastering Console
IRON
IRON
Mastering Compressor
PASSEQ
PASSEQ
Passive Mastering Equalizer

Manuals

Play Video
Replacement of defective fuses for 115V
Play Video
Replacement of defective fuses for 230V
Play Video
Changing the mains voltage from 115V to 230V
Play Video
Changing the mains voltage from 230V to 115V

Specifications

Analog inputs & output; XLR (balanced)

Maximum input & output gain
32.5 dBu
Input impedance
20
Output impedance
75 Ω
Common mode rejection
-82 dBu
Frequency range (-3 dB)
10 Hz – 100 kHz
THD & N (+30 dBu, 1 kHz)
0.0005 %
Noise (A-weighted)
-94.3 dBu
Dynamic range
135 dB

Internal Linear Power Supply with Shielded Toroidal Transformer

Operating voltage for analog audio
+/- 60 V
Operating voltage for relays and LEDs
+ 12 V

Mains Power Supply

Mains voltage (selectable, see fuse chamber)
230 V AC / 50; 115 V AC / 60 Hz
Fuse for 230 V
T 3.15 A
Fuse for 115 V
T 6.3 A
Power consumption
max. 100 VA

Dimensions & Weight

W x H x D (width x height x depth)
482 x 177 x 300 mm
19 x 6.97 x 11.8 inch
Unit weight
15.2 kg
33.51 lbs
Shipping weight (incl. packaging)
17.8 kg
39.24 lbs

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

Calculation of VAT (value added tax)

All prices are displayed by default including the VAT of your country.

If your country cannot be determined via geolocation and you are not logged in as a user with the billing address of your country, the prices are displayed including the VAT of Germany (19%).

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.

Due to the current pandemic and the associated worldwide shortage of components, delivery times may be significantly delayed in some cases.

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.

Aufgrund der aktuellen Pandemie und der damit verbundenen weltweiten Bauteileverknappung kann sich die Lieferzeit z.T. stark verzögern.

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

A-Stock

Brand-new product from the current product portfolio.

B-Stock

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

C-Stock

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.

NOS

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

Events

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

Events

Aufgrund von Covid19 sind derzeit keine Events geplant.

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