Airfield Audio LIMINATOR Owner'S Manual Download Page 3

 

 

 

www.airfieldaudio.com

 

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INTRODUCTION 

 
 
 

Thank you for choosing Airfield Audio.  
 
Our many years of specializing in tech service, custom build and modifications to high 
end studio and professional audio installations are now being expanded with an exciting 
new product line. For the Airfield Audio Liminator we have analyzed more than a dozen 
classic and vintage audio compressors, and have distilled the best of the best into this 
device. Your ears will love the sound of this unique analog processor. 
 
Class A discrete transistor circuitry is used exclusively, with classic input and output 
transformers deployed as an important element of the design. The best sound possible is 
realized with a complete reduction of cable-induced noise. And, in fact, a main feature of 
the Liminator is the inclusion of 2 switchable input transformers for a great range of 
flexibility and tone. All front panel controls as well as internal components have been 
selected for ruggedness and long life. We take pride in quality construction; all units are 
handcrafted with care, thoroughly bench tested, calibrated and burned in for 48 hours. 
 
The Airfield Audio Liminator exemplifies state of the art analog audio design, and 
delivers natural, musical characteristics to the recording process. One of the most 
versatile compressors ever invented, it can be used with confidence on voice, all 
instruments, any sound source, and with an additional unit, on stereo mix and mastering. 
 
For reasons not even science can fully explain, the best analog devices create a sonic 
magic that flows from the sound source through real parts and circuitry into the human 
ear with the highest clarity and resolution. Airfield Audio is dedicated to this natural 
process. It sounds very very very very good. 
 
 
 
  
 
 
 

 
 
 

Summary of Contents for LIMINATOR

Page 1: ...LIMINATOR CLASS A DUAL TRANSFORMER COMPRESSOR OWNER S MANUAL www airfieldaudio com ...

Page 2: ...TABLE OF CONTENTS SECTION PAGE INTRODUCTION 2 INSTALLATION 3 FRONT PANEL CONTROLS 4 OPERATION 5 SPECIFICATIONS 7 WARRANTY AND REGISTRATION 8 www airfieldaudio com 1 ...

Page 3: ...r is the inclusion of 2 switchable input transformers for a great range of flexibility and tone All front panel controls as well as internal components have been selected for ruggedness and long life We take pride in quality construction all units are handcrafted with care thoroughly bench tested calibrated and burned in for 48 hours The Airfield Audio Liminator exemplifies state of the art analog...

Page 4: ...ot 4 Connect an audio output cable to the 3 pin XLR male connector and plug it into the input of your recording or mixing device The output XLR is Balanced Transformer Coupled pin 2 hot 5 Connect the supplied IEC power cable to the IEC mains socket on the rear panel USE ONLY A 3 PRONG GROUNDED POWER CABLE For safety reasons do not lift the ground on the power plug by using a 3 to 2 ground lift ada...

Page 5: ...me compression E OUTPUT Continuously variable adjustment This control determines the amount of gain make up Fully ccw audio is off Fully cw gain is at maximum This control knob goes to 11 F METER Measures in decibels amount of gain reduction input level or output level according to meter switch G METER 3 position rotary switch select meter function In Input Level SWITCH GR Gain Reduction Out Outpu...

Page 6: ...tion of signal on the VU meter Normal gain reduction is 2 to 6dB Higher RATIO settings will result in deeper compression 8 While listening adjust the OUTPUT control to maintain an appropriate level back into your signal path To view the output level on the VU meter set METER switch to Out After In and Out levels have been checked it is recommended that the METER switch be normally left in GR posit...

Page 7: ...accurate flat response perfect for mixing mastering and pristine tracking T2 is a lower impedance Sowter transformer select it when thicker musical harmonics and richer tone are desired for tracking or mixing When using a pair of Liminator compressors linked for stereo operation both channels should be set to same input transformer 13 MODE Select Comp compress for normal unit operation or Bypass t...

Page 8: ...Hz 92 dB typical below operating level DISTORTION less than 02 THD at unity gain 4 dBu input level 1 THD at 24 dBu input level MAXIMUM OUTPUT 32 dBu into 600Ω GAIN REDUCTION RANGE 0 20 dB ATTACK 5 30 60 100 150 milliseconds RELEASE 1 3 6 2 6 seconds GAIN REDUCTION ELEMENT LD1 forward biased optical resistive module METER dB Gain Reduction dB Input dB Output 0VU 4dBu POWER REQUIREMENTS 15 watts 115...

Page 9: ... labor All returns to Airfield Audio require a return authorization number and must be in original packaging shipped to Airfield Audio via insured freight at the owner s expense Charges for transportation costs and damage in transit are not covered by this warranty The equipment will then be returned via prepaid insured freight method and carrier to be determined solely by Airfield Audio Airfield ...

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