background image

17

Security Advices

Connections

Only use the connections as described. Other connections can lead to health risks and 
damage the equipment.

Water and humidity

Do not use this device anywhere near water (for example in a bath room, a damp  cellar, 
near  swimming  pools,  or  similar  environments).  Otherwise  your  are  dealing  with  an 
extremely high risk of fatal electrical shocks!

Insertion of objects or fluids

Be careful to not insert any object into any of the chassis openings. You can otherwise 
easily come into contact with dangerous voltage or cause a damaging short circuit. Never 
allow any fluids to be spilled or sprayed on the device. Such actions can lead to dangrous 
electrical shocks or fire!

Ventilation

The vent openings on the unit are meant to avoid the Gemini from overheating. You should 
never cover nor block these openings. 

Power Supply

Power the unit exclusively with the voltage rating specified on the unit. In case of doubt, 
contact your local dealer or electric provider. Disconnect the unit from the electric power 
grid if you are not going to use it for a long period 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 technician or engineer. Really: Do not 
open the device housing, as there is great risk you will damage the device, or – even after 
being disconnected – you may receive a dangerous electrical shock!

Cord protection

Make sure that your power and audio signal cords are arranged to avoid being stepped on 
or any kind of crimping and damage related to such event. Do not allow any equipment or 
furniture to crimp the cords. Power connection overloads: Avoid any kind of overload in 
connections to wall sockets, extension or splitter power cords, or signal inputs. Always 
keep manufacturer warnings and instructions in mind. Overloads create fire hazards and 
risk of dangerous shocks! 

Lightning

Before thunderstorms or other severe weather, disconnect the device from wall power; 
do not do this during a storm in order to avoid life threatening lightning strikes. Similarly, 
before any severe weather, disconnect all the power connections of other devices and 
antenna  and  phone/network  cables  which  may  be  interconnected  so  that  no  lightning 
damage or overload results from such secondary connections.

Summary of Contents for Gemini 1720

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Reviews: