MASTERING

Gemini

Mastering M/S Processor

Gemini is the first mid/side processor in 120V technology. In mastering, M/S processing is often the best way to get targeted access to individual elements of a mix.

M/S ?

The decomposition of the stereo signal in mid (voice, snare, bass …) and side (guitars, pads, cymbals …) allows their separate processing.

The center signal (Mid) is the sum of the left and right channel of the stereo signal (L+R), i.e. the “in phase” part of the stereo signal.

The side signal (Side) is the difference of the left and right channels of the stereo signal (L-R), i.e. the “out-of-phase” part of the stereo signal.

Gemini can also be used to enlarge or reduce the stereo image. An elliptical filter for shifting the low frequency component from the side to the mid is also on board.

“The Gemini turns everything in mid/side. This is pretty crazy, because I can turn not just a single unit in mid/side, but an entire rack. This is a great unit.”

“The Gemini is the gear that reinvented all of my others gears. For me it would be hard to work without this equipment nowadays.”

“Definitely one of the tools I don’t want to miss on any project!”

“Before the Gemini, I used to use the SPL M/S Master. But again. The 120V DC audio rail rules 🙂 Gemini is the analog hardware which gives me the opportunity to shape the mid and side separately.”

The Mid

When the M/S button is activated, the input signal (L/R stereo) is split into a mid and side signals.

The exact center position can be adjusted with the Balance control and the exact level with the Trim control. Both functions are switchable to be in the signal path only when in use.

Exclusive monitoring of the center is possible when the solo function is activated.

Processors can be inserted to process the mid signal and activated with the Insert button. 

The Side

The side signal also has a solo function and a switchable insert for external processing. 

In addition, the elliptical filter can be used to shift the bass frequencies from the side to the mid. This improves the punch and precision of low frequencies. The Stereo Width control changes the level of the side signal, with a level increase broadening the stereo image.

These two functions can also be switched on to be in the signal path only when used. 

Play Video
Hardware and M/S-Mastering: SPL Hermes + Gemini - Test/Review/Workshop/Tutorial (The Soundphile)

I/Os and Inserts

All inputs and outputs as well as sends and returns are balanced using Neutrik XLR connectors.

Processors can be connected to the inserts for external processing.

Especially interesting is the integration of the Gemini into the Hermes Mastering Router. In this way, processing chains can be created that combine classic L/R processing with M/S processing.

Gemini & Hermes

The M/S encoder and decoder stages of the Gemini can each be connected to an insert of the Hermes and freely positioned within the processing chain.

Processors that are in a chain between M/S encoder and decoder process the mid/side signal. These processors can also easily be mono devices.

In the example above, Insert Send A is routed to Gemini for M/S encoding. The mid/side sends of the Gemini go back to Return A of the Hermes.

Send B goes from Hermes back to the Gemini to be encoded back to L/R, which flows from the output of the Gemini back to Return B of Hermes. 

For example, it is possible (see figure above) to place the M/S encoder at processing position 3, an equalizer at processing position 4 for separate processing of the mid and side signals, and then the M/S decoder stage of the Gemini at processing position 5 to generate an L/R stereo signal again.

If a compressor is now to be used as an additional device for M/S processing, it can simply be set to processing position 5 in the chain, and the M/S decoder stage would move to processing position 6 accordingly.

Play Video
This video leads you step by step through Gemini.
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

Studio Magazin

Other Mastering Series Products

Mercury
Mercury
Mastering D/A Converter
Hermes
Hermes
Mastering Router
MC16
MC16
16-channel Monitor Controller
DMC
DMC
Mastering Console
IRON
IRON
Mastering Compressor
PQ
PQ
Mastering Equalizer
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
-79 dBu
Frequency range (-3 dB)
10 Hz – 150 kHz
Crosstalk (1 kHz)
-108 dBu
THD + N (0 dBu, 1 kHz)
-110 dBu
Noise (A-weighted), all stages active)
-98,2 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 500 mA
Fuse for 115 V
T 1 A
Power consumption
max. 40 VA

Dimensions & Weight

W x H x D (width x height x depth)
482 x 44 x 300 mm
19 x 1,73 x 11,8 inch
Unit weight
5 kg
11,02 lbs
Shipping weight (incl. packaging)
6.8 kg
14,99 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.

Anmelden