background image

16

Warranty

Audio Research Corporation products are 

covered by a 3-Year Limited Warranty 

or a 90-Day Limited Warranty (vacuum 

tubes). This Limited Warranty initiates 

from the date of purchase, and is 

limited to the original purchaser, 

or in the case of demonstration 

equipment, limited to the balance 

of warranty remaining after original 

shipment to the retailer or importer.

In the United States, the specific terms, 

conditions and remedies for fulfillment 

of this Limited Warranty are listed on 

the warranty card accompanying the 

product in its shipping carton. The 

warranty terms are also available on the 

internet at www.audioresearch.com/

en-us/company/warranty-statement. 

Outside the United States, the authorized 

importing retailer or distributor has 

accepted the responsibility for warranty of 

Audio Research products sold by them.

The specific terms and remedies for 

fulfillment of the Limited Warranty may 

vary from country to country. Warranty 

service should normally be obtained from 

the importing retailer or distributor from 

whom the product was purchased.

In the unlikely event that technical service 

beyond the ability of the importer is 

required, Audio Research will fulfill the 

terms and conditions of the Limited 

Warranty. Such product must be 

returned at the purchaser’s expense to 

the Audio Research factory, along with a 

photocopy of the dated purchase receipt 

for the product, a written description 

of the problem(s) encountered, and 

any information necessary for return 

shipment. The cost of return shipment 

is the responsibility of the purchaser.

Summary of Contents for Reference 250 SE

Page 1: ...Reference 250 SE H I G H D E F I N I T I O N...

Page 2: ......

Page 3: ...ou are eager to begin listening however please take a few minutes to read through this guide for useful information concerning the operation of your new amplifier Once installed please allow an approp...

Page 4: ...t Connectors Matching Remote Turn on A C Power Connection 5 6 7 8 9 9 9 10 11 Operation Front Panel Controls and Displays Start Up Shut Down Display Brightness Adjustment Fan Meter Break in Output Tub...

Page 5: ...hock The appliance coupler a c power connector at the rear of this unit must be accessible for emergency power disconnect For continued protection against fire hazard replace the fuse only with the sa...

Page 6: ...tor Proceed according to the following instructions Installation Remove all screws fastening the top cover Carefully remove each vacuum tube from its protective foam and match its location V number wr...

Page 7: ...Due to its weight this amplifier must be supported on a surface specifically rated for such a load Check with the manufacturer of your support system to be sure it is rated to handle this weight If t...

Page 8: ...PER SPEAKER CONNECTIONS SEE OWNERS MANUAL WARNING TO PREVENT FIRE AND SHOCK HAZARD DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE UNIT MUST BE OPERATED IN A HORIZONTAL POSITION DO NOT OPERATE WITH COVE...

Page 9: ...on In the case of speaker systems with significant variations in impedance throughout the frequency spectrum such as most electrostatic types determine the best impedance match empirically for best ov...

Page 10: ...2V IN jack on the rear of the Reference 250 SE The 12V IN jack should be connected to the 12V DC output of the master control system using a continuous 12V DC signal at 12mA per Reference 250 SE for t...

Page 11: ...ge the loudspeakers Good operating practice dictates that the amplifier should be turned on last and turned off first in an audio system The Reference 250 SE uses a grounding system that does not requ...

Page 12: ...ION FAN LIGHT POWER BIAS METER V1 V3 V5 V6 V4 V2 SET SET CHECK CHECK R Panel output and bias meter Main Power Switch Fan Speed Operation Front Panel Controls and Displays Display Brightness Bias Opera...

Page 13: ...has no impact on sound quality when turned on The display brightness has three settings high low and off To change the brightness of the display locate the front panel button labeled Light Press this...

Page 14: ...ch again to check V3 tube bias level which should be within the bias range arc Press the BIAS switch again and check the V5 tube bias level in the same way Note that the V3 and V5 tube bias levels are...

Page 15: ...ation at service audioresearch com or call 763 577 9700 You may also initiate a service request by visiting the Audio Research website www audioresearch com and selecting Service Repair at the top rig...

Page 16: ...the United States the authorized importing retailer or distributor has accepted the responsibility for warranty of Audio Research products sold by them The specific terms and remedies for fulfillment...

Page 17: ...ut Polarity Non inverting Balanced input pin 2 IEC 268 Output Taps 16 ohms 8 ohms 4 ohms Output Regulation Approximately 0 9dB 16 ohm load to open circuit Damping factor approximately 10 Overall Negat...

Page 18: ...15 Audio Research Corporation Reproduction of this document in part or whole is expressly forbidden without written consent from Audio Research Corporation H I G H D E F I N I T I O N 3900 Annapolis L...

Reviews: