background image

4) Circuit Topology  

REFERENCE

10

The tube electronics found in the Manley Reference Series 
Microphones consist of two triodes per capsule in 
cascade, forming an entire gain-block. 

The tube employed in the Reference Gold and Reference 
Cardioid is a dual-triode 12AX7 and the tube used in the 
Reference Silver is a 5670 dual-triode. Both tube types are 
easily obtainable and replaceable. 

Removing the two Philips screws at the base of the 
microphone body, allows the complete  microphone 
assembly to be removed so the tube may be replaced 
easily, which is mounted in a ceramic socket with silver 
pins. There is no need to remove the body from the 
suspension system. Be wary not to touch the gold capsule 
at the top of the assembly, this is very fragile, even a 
finger-print on the diaphragm will impede performance.  

The output of the tube stage is coupled through a custom 
built Manley Iron output transformer of unparalleled 
quality and substantial physical size employing pure 
nickel laminations. The windings incorporate a bi-filar 
winding technique which stops any possibility of 
“humbucking”.  The finished transformer is then resin 
potted in a mu-metal enclosure maximizing stability.

Summary of Contents for REF CARDIOID

Page 1: ...REFERENCE TUBE MICROPHONES REF CARDIOID REF SILVER REF GOLD OWNER S MANUAL...

Page 2: ......

Page 3: ...tor Microphone Power Supply Swivel Pattern Adjust Tool REF S Only Package Contents CHAPTER PAGE i Table of Contents 1 ii Introduction 2 iii Reference Models 3 1 Power Supply 4 2 General 5 3 Microphone...

Page 4: ...tem is employed in all three models minimizing any mechanical interaction whilst recording The entire working guts of the microphone may be removed for servicing in one piece no need to remove the mic...

Page 5: ...e hand made capsule features a 5 micron evaporated gold diaphragm which is based on the vintage C37A This microphone has an adjustable mechanical vent on the rear of the grille which changes the polar...

Page 6: ...cable provided DO NOT USE ANY OTHER CABLES FOR THIS PURPOSE It also has a 3 pin XLR which provides the audio ouput to your microphone preamplifier REF CARDIOID REF GOLD PSU REF SILVER PSU PSU FRONT V...

Page 7: ...We strongly recommend a good 2 layer nylon pop screen with these microphones on close vocals CONNECTIONS REFERENCE GOLD REFERENCE CARDIOID MODELS connect the 6 pin cable supplied between the PSU and...

Page 8: ...movement are exceptions A pop filter will be needed for close vocals LOW PASS FILTER SWITCH REF SILVER This switch activates a filter which is useful if trying to remove unwanted low frequency noise...

Page 9: ...ng the pattern select closer to OMNI Compared to many microphones the Manley Reference Gold Microphones exhibit less proximity effect for a given close distance This we feel is a clear advantage Most...

Page 10: ...by 20 dB or more from response to sounds arriving from other directions The REF S allows the traditional omni and cardioid patterns to be selected repeatedly and with some care it is possible to set...

Page 11: ...30 90 330 270 210 60 120 300 240 150 180 0 30 90 330 270 210 60 120 300 240 150 180 0 30 90 330 270 210 60 120 300 240 150 180 Examples of Typical Polar Patterns 0 30 90 330 270 210 60 120 300 240 150...

Page 12: ...ly to be removed so the tube may be replaced easily which is mounted in a ceramic socket with silver pins There is no need to remove the body from the suspension system Be wary not to touch the gold c...

Page 13: ...the phase on your microphone preamp if it has a phase switch and see if that helps Put on some headphones close your eyes and speak into the microphone from a distance of about one foot Your voice sho...

Page 14: ...et 6 Taking care to align the pins properly insert the new tube into the socket and repeat these steps again CAREFULLY returning the guts to the inside of the microphone Make sure to properly tighten...

Page 15: ...LR Pin 2 Hot Pin 3 Low AMPLIFIER DISTORTION Less Than 0 05 THD N BW 22 22 kHz 1Kohm Load 1kHz 40dBV Output AMPLIFIER NOISE Typically 108 dBV A Weighted BODY Etched Silver Anodized Aluminum Weight 1 5l...

Page 16: ...in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipmen...

Reviews: