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3.

 

Use  your  flathead  screwdriver  to  turn  the  ADJUST  trim  pot  while  viewing  the 
reading  on  your  multimeter.  For  6L6/5881  style  tubes,  set  the  adjustment 

between 58-64mV

. From the factory the power tubes were biased to around 

the middle setting of 62mV. 

WARNING:

 Setting the bias higher than 70mV may 

destroy your tubes and your amp and will void your warranty. 

 
4.

 

Allow the amp to warm up for at least 5-10 minutes and readjust the bias to the 
desired setting. 

 
5.

 

Plug an instrument in and play through the MIG-50. Adjust the bias to taste, if 
necessary. 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

WARRANTY INFORMATION 

 

Please  register  online  at  http://www.ehx.com/product-registration  or  complete  and 
return the enclosed warranty card within 10 days of purchase. Electro-Harmonix will 
repair  or  replace,  at  its  discretion,  a  product  that  fails  to  operate  due  to  defects  in 
materials  or  workmanship  for  a  period  of  one  year  from  date  of  purchase.  This 
applies only to original purchasers who have bought their product from an authorized 
Electro-Harmonix retailer. Repaired or replaced units will then be warranted for the 
unexpired portion of the original warranty term. 
 
If you should need to return your unit for service within the warranty period, please 
contact  the  appropriate  office  listed  below.  Customers  outside  the  regions  listed 
below, please contact EHX Customer Service for information on warranty repairs at 
[email protected] or +1-718-937-8300. USA and Canadian customers:  please obtain a 

Return Authorization Number

 (RA#) from EHX Customer Service before returning 

your product. Include ̶ with your returned unit ̶ a written description of the problem 
as well as your name, address, telephone number, e-mail address, RA# and a copy of 
your receipt clearly showing the purchase date. 
 

 

United States & Canada 

Europe

 

 

EHX CUSTOMER SERVICE 

JOHN WILLIAMS 

 

ELECTRO-HARMONIX 

ELECTRO-HARMONIX UK 

 

c/o NEW SENSOR CORP. 

13 CWMDONKIN TERRACE 

 

47-50 33RD STREET 

SWANSEA SA2 0RQ 

 

LONG ISLAND CITY, NY 11101 

UNITED KINGDOM 

 
 

Tel: 718-937-8300 

Tel: +44 179 247 3258 

 

Email: [email protected] 

Email: [email protected] 

 
 

The  CE  logo  indicates  that  this  product  has  been  tested  and  shown  to 
conform with all applicable European Conformity directives. 
 

 
The  WEEE  or  “trashcan”  logo  indicates  that  this  product  is  made  up  of 
electronic  components  that  should  not  be  trashed  alongside  household 
waste but instead should be recycled by a proper electrical waste facility. 

Summary of Contents for MIG-50

Page 1: ... the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched Unplug this amplifier during lightning storms or when unused for long periods of time WARNING To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture Do not expose this apparatus to dripping or sp...

Page 2: ...osure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operation and maintenance servicing instructions in the literature accompanying the product GETTING STARTED BEFORE PLUGGING POWER INTO YOUR MIG 50 AMP MAKE SURE 1 Both the POWER and STANDBY toggle...

Page 3: ...oudness of channel I the normal channel VOL II Knob Controls the overall loudness of channel II the bright channel TONE Knobs TREBLE MIDDLE BASS and PRESENCE controls are used to alter the amplifier s frequency response Adjust to taste and experiment with different settings Lamp Lights when the POWER switch is on Replacement part Dial Lamp 47 T 3 6 3V 0 15A bayonet base REAR PANEL AC INLET Plug th...

Page 4: ...n case it falls HOW TO ADJUST POWER TUBE BIAS In order to adjust the bias of your tubes you will first need a digital multimeter capable of reading DC millivolts and a small flathead screwdriver If you are uncomfortable with using these types of tools or do not understand what power tube bias is please refer to a professional technician We also encourage you to research the subject yourself as the...

Page 5: ... the factory the power tubes were biased to around the middle setting of 62mV WARNING Setting the bias higher than 70mV may destroy your tubes and your amp and will void your warranty 4 Allow the amp to warm up for at least 5 10 minutes and readjust the bias to the desired setting 5 Plug an instrument in and play through the MIG 50 Adjust the bias to taste if necessary ...

Page 6: ...at info ehx com or 1 718 937 8300 USA and Canadian customers please obtain a Return Authorization Number RA from EHX Customer Service before returning your product Include with your returned unit a written description of the problem as well as your name address telephone number e mail address RA and a copy of your receipt clearly showing the purchase date United States Canada Europe EHX CUSTOMER S...

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