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6

Installation

Voltage Selection

Before connecting the Gemini Mastering M/S Processor to the mains, make sure that the 
voltage selection corresponds to the values of your local power grid (230 or 115 volts). 
Inside the power connector, to the right, next to the on/off switch, there is an opening 
that displays the voltage selected. If the voltage indicated does not correspond to the one 
required, change it by following this procedure: 

Open the power connector lid with a small screwdriver (use the tiny slots on the right hand 
side). Use the screwdriver to lever the red fuse holder from above until you can grab it. 
Take the fuse holder out and replace the fuse with one corresponding to the local power 
grid specifications. You can find the adequate values on the rear of the unit or on page 16 
of this user‘s manual. Turn the fuse holder around 180 degrees and place it back again. 
When you close the lid again, you should see the correct voltage displayed in the opening. 

On the product site on our website (https://gemini.spl.audio) you will find a video con-
cerning the topic “Changing the mains voltage”. If you ever have to exchange a fuse, we 
recommend the video “Exchange defective fuses”.

First Steps

Before turning on the Gemini Mastering M/S Processor you must first connect the included 
3-pin power cord to the 3-pin IEC socket. The transformer, power cord and IEC socket all 
comply to the VDE, UL and CSA regulations. 

The Gemini Mastering M/S Processor should not be installed in close proximity to equip-
ment  that  emits  magnetic  fields  or  emanates  heat.  Avoid  exposure  to  heat,  moisture, 
dust,  and  vibrations.  Do  not  install  the  Gemini  Mastering  M/S  Processor  close  to  any 
power amps or digital processors. Instead, install it in a fully “analog rack” where any 
interferences can be avoided (Word Clock, SMPTE, MIDI etc.). 

The unit should be powered off before connecting or disconnecting any cables or equip-
ment to it. 

Use the On/Off switch on the rear panel to turn the unit on or off. The illuminated red LED 
in the middle of the front panel indicates the unit‘s operating status. The On/Off switch 
was placed on the rear panel to avoid any emissions due to voltage-carrying conductors 
running across the unit and affecting sound. When powering on or off, there‘s no need 
to observe a specific sequence regarding the connected devices. However, like with any 
audio signal chain, power amplifiers should always be powered on last and powered off 
first. The Gemini Mastering M/S Processor can be powered on and off with the use of a 
circuit breaker, as long as the total load does not exceed the rating of the latter. 

Содержание Gemini 1720

Страница 1: ...Gemini Mastering M S Processor Manual...

Страница 2: ...y 3 Technical Aspects 4 120 Volt Technology 4 120 Volt Technology Diagram 5 Installation 6 Voltage Selection 6 First Steps 6 Cabling Rear Side 7 XLR inputs and output 7 Ground Lift switch to avoid gro...

Страница 3: ...13 4 Balance Trim 13 5 Balance 14 6 Trim 14 7 Insert SIDE 14 8 Solo SIDE 14 9 Filter Width 14 10 Stereo Width 15 11 Elliptical Filter 15 Specifications 16 Measurements 16 Security Advices 17 Notes on...

Страница 4: ...Mastering M S Processor is available in different colors Black Model 1720 Red Model 1724 All Black Model 1723 Do consider keeping the original packaging It can come in very useful whenever you need to...

Страница 5: ...to specifically get access to individual elements within a mix Gemini also provides the possibility to work on the stereo panorama With the Balance control you can position the mid signal within the...

Страница 6: ...in the USA Simon Heyworth s Super Audio Mastering in the UK Galaxy Studios in Belgium and the legendary Wisseloord in the Netherlands for instance The 120 Volt technology is based on op amps develope...

Страница 7: ...doubling the acoustic power 6 dB correspond to twice the sound pressure level and 10 dB correspond to twice the perceived loudness When it comes to volume the 120 volt technology exhibits a performan...

Страница 8: ...re turning on the Gemini Mastering M S Processor you must first connect the included 3 pin power cord to the 3 pin IEC socket The transformer power cord and IEC socket all comply to the VDE UL and CSA...

Страница 9: ...to the or hot Signal In case an unbalanced connection is necessary the correct polarity of the conductors needs to be observed Ground Lift switch to avoid ground loops On the rear panel of the Gemini...

Страница 10: ...s Gemini provides two balanced inputs labeled as Inputs These are female XLR jacks Connect the stereo signal which is supposed to be processed with the Gemini to these inputs Connect the left channel...

Страница 11: ...rns Connect the left channel to RETURN MID and the right channel to RETURN SIDE Send and Return together make up the insert of Gemini Mastering M S Processor With this insert external processors for f...

Страница 12: ...n SUB MONO GND LIFT Mono AUDIO FEEDS TO FROM MC16 GND LIFT GND FUSES SUB MONO FUSES 115V T 2 A L 250V 230V T 1 A L 250V Mono Mono Mono Mono SUB SPEAKER D L R L R SPEAKERS C SPEAKERS C L R L R SOURCE 1...

Страница 13: ...is way it is possible see image below to place the M S Encoder on the third position an equal izer on the fourth to use it for separate proces sing of the mid and side signal and then use the M S Deco...

Страница 14: ...M S encoding and M S decoding does not take place Devices connected to the insert are fed with the regular L R stereo signal All further buttons and controls of Gemini have no effect on the audio sig...

Страница 15: ...th 10 Stereo Width 11 Elliptical Filter 3 Solo MID If the SOLO button of the MID section is activated you can only hear the mid part of the M S signal If the SOLO button of the SIDE section is activat...

Страница 16: ...ereo signal L R hence the out phase part of the stereo signal The insert is located before the ELLIPTICAL FILTER and the STEREO WIDTH control 8 Solo SIDE If the SOLO button of the SIDE section is acti...

Страница 17: ...ception of the stereo width 11 Elliptical Filter The ELLIPTICAL FILTER Cauer Filter removes signal components below a predefined fre quency from the side signal You can then hear these signal componen...

Страница 18: ...Balance Trim Filter Width active 98 2 dBu THD N at 20dBu 110 dBu Common Mode Rejection at 0dBu 79 dB Transmission Bandwidth 10 Hz 150 kHz Power Consumption 0 11 Amp 230V 50Hz 24 Watt 32 VA 0 22 Amp 11...

Страница 19: ...of time Unplug the power chord from the mains to cut power supply to the unit Always make sure that the mains plug is easily accessible Opening the unit Simply put DON T if you are not a certified SPL...

Страница 20: ...rts or those with identical specifications as the originals Incorrectly substituted parts can lead to fire electrical shock or other dangers including further equipment damage Safety inspection Be sur...

Страница 21: ...be copied or reproduced in any man ner in part or fully without prior authorization by SPL Sound Performance Lab SPL continuously strives to improve its products and reserves the right to modify the p...

Страница 22: ...Active Solo mastering m s processor Gemini T R I M S T E R E O W I D T H dB Hz dB Insert Insert 120 V DC Audio Rail MID M S SIDE Model 1720 2 5 2 0 1 5 1 0 0 5 0 0 5 1 0 1 5 2 0 2 5 3 5 3 0 2 4 1 5 0...

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