ONE LA - IGS Audio
Contents
1. ONE LA USER S MANUAL IGS Audio Igor Sobczyk 3 Maja 76d 41 400 Mys owice Poland e mail igs o2 pl ph 48 601 597 592 www igsaudio com Please read all of the following instructions and save them for later reference before attempting to connect the unit to the mains EARTH This unit is connected via its power cord to the mains safety earth NEVER OPERATE THE UNIT WITH THIS EARTH CONNECTION REMOVED COVERS DO NOT remove the covers Refer servicing to qualified personnel only VOLTAGE Equipment is set to operate only at the voltage indicated on the back of the unit CHECK that the correct voltage is selected before connecting the AC mains supply FUSES CHECK that the fuse fitted is the correct type for the local mains voltage ALWAYS replace fuse with the correct type MOISTURE DO NOT expose the unit to rain or moisture If the unit should become so exposed REMOVE the mains power immediately CABLES PROTECT the mains power cord from damage though impact or abrasion HEAT ALWAYS site the unit away from sources of heat including direct sunlight and ensure adequate ventilation around the unit A CAUTION AVIS A RISK OF ELECTRICAL SHOCK DO NOT OPEN RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR CAUTION TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE TO REDUCE THE RISK OF ELECTRICAL SHOCK DO NOT REMOVE TOP OR BOTTOM COVER REFER SERVICING TO QUALIFIED SERVICE PERSON2. referring to the legendary solution of United Recording Electronics Industries It is an input and output transformer balanced full tube device The input of the system is equiped with a Sowter 4383 transformer the output with Edcor 15k 600 Two 6N2P EW 6N1P EW dual triodes are installed on the audio circuit while the compression circuit isequipped with the 6N2P EW triode and the 6AQ5 pentode that controls the work of the T4BX photocell On the front panel you can adjust the output gain GAIN and compression threshold PEAK REDUCTION Additionally you can select the operating mode between Compress and Limit You can also set the meter to VU or Gain Reduction reading Inside the device are 4 tubes with 245V anode voltage The system is mounted on a PCB which results in short connections inside the device improves the bandwidth and stability On the rear panel the input and output XLR connectors have been installed The whole device is designed to work with a symmetrical 4dBu signal It is known that in the case of ONE LA the nature of the device depends on the T4B photo cell The original solution used the TELETRONIX electroluminescent panel that was illuminating the photo resistor The idea of opto compression originated in the past is still being cultivated today IGS Audio has developed its own photocell equivalent to T4B called T4BX The use of carefully selected components in the production of the T4BX photocell and their individual measur
3. Impedance 600 ohm Tubes Used 6N1P 6N2P 6AQ5 Max Gain Reduction 36 Maximum Gain 30 Attack Time 1ms Release Time 0 5 5s 50 60ms Frequency response 20 20k Hz 0 1 dB 0 4 dB THD N Q0dBu 85 dB A Power consumption 40 W Shipping weight 7kg Dimensions 19 2U 230mm deep Troubleshooting My unit doesn t light up the VU meter is dark Please check the power cord and the switch at the front of the unit is in ON position Check the fuses The signal plays thru but there is no change in signal when i turn the knobs Please check the bypass switch No signal plays thru the unit regardless the settings at the front panel Please check the cables connecting the unit Warranty This device is declared to be free from defects in material and workmanship for a period of three years Any device found defective within three years from the delivery date and returned to the factory will be repaired adjusted or replaced and sent to the customer with no charge The customer always pays the shipping cost to us This warranty does not cover expendable items such as tubes or fuses If the defect has been caused by a misuse or abnormal operation conditions the repair will be billed at a nominal cost The product should be returned in its original package if this is possible or packed in such a way that it is not damaged during the shipment We are not to be held responsi
4. NEL Copyright 2014 All rights reserved The information in this document is subject to change without notice IGS Audio makes no warranty of any kind with respect to the material in this document and shall not be liable for errors contained herein or for incidental or consequential damages related to the use of the material Manual revision 1 0 December 2014 R IGS Thank you for buying this IGS Audio product Please read the information provided below very carefully before using your IGS unit Unpacking Your ONE LA has been carefully and meticulously tested and inspected before dispatch Please check for any signs of transit damage If any signs of mishandling are found please notify the carrier and your dealer immediately Your ONE LA packing should contain an ONE LA with IGS Audio tag and power cord and this manual with the Warranty and RoHS CE WEEE Declaration attached Compatibility and Power There is a fuse socket near the power cable connector on the on the back of the unit Ensure that the correct fuse is being used before plugging the ONE LA to the power outlet gt For US area 115V use 2A Slow Blow Type T gt For Europe and rest of the world area 230V use 1A Slow Blow Type T Always check the voltage selector on the back of the unit to ensure that it is set to the proper voltage available in your country IGS AUDIO ONE LA mono opto compressor The IGS ONE LA is a photo optical compressor
5. ble for any damages during the shipment 19 units shall always be packed in a box with support for the rack ears All 500 series modules need to be secured in ESD bag and protected with foam We will charge the customer 20 VAT if the packing material needs to be replaced If we find that the product works perfectly the customer will be invoiced 50 VAT to cover our costs of examination and handling plus the cost for returning the product to the customer www igsaudio com
6. ement and matching result in completely repetitive sound qualities of each device Block diagram PHOTOCELL GAIN RED AMP BYPASS i BALANCED BALANCED OUTPUT INPUT ONE LA BLOCK DIAGRAM GAIN KNOB VU GR METER pd POWER 125 PEAK REDUCTION LIMIT COMP METER BYPASS PEAK SWITCH MODE SWITCH REDUCTION VU GR METER GAIN KNOB PEAK REDUCTION KNOB LIMIT COMPRESSOR MODE SWITCH BYPASS SWITCH METER MODE SWITCH KNOB Big VU meter showing either the amount of gain reduction or the output level of the signal This is the make up gain knob You can adjust the amount of singnal at the output of ONE LA Also called REDUCTION knob allows You to control the depth of dynamics reduction It can vary form a fraction of dB up to 20 dB or more The amount of reduction applied can be read on the VU meter This switch allows You to choose between Compressor ratio fixed at 4 1 soft knee and Limiter 1 ratio Mode This two settings provide significantly different sonic qualities The audio signal passes thru the compressor circuit when this switch is set to IN The BYPASS setting causes the circuit to be taken off the signal path Choose between Gain Reduction or Output Level mode of the main VU meter ONE LA technical specification Operating Level 4dBu Maximum Input 16dBu Maximum Output 18dBu Input impedance 600 ohm Output
Download Pdf Manuals
Related Search