Biamp DA28R, Operation Manual

1 

DA28R 

TABLE OF CONTENTS

 
Front & Rear Panel Features 
 
Logic Input & Transformers 
 
Applications 
 
Specifications & Block Diagram 
 
Warranty 

pg. 2

pg. 3

pgs. 4 & 5

pg. 6

INTRODUCTION

 
The 

DA28R

 is a 2-in by 8-out distribution amp/router.  Each input channel 

accepts mic or line-level signals, and includes phantom power for condenser 
microphones.  All outputs are electronically balanced & floating line-level, with 
600 ohm drive capability.  Logic inputs allow routing of each input to specific
outputs via external contact-closures.  The DA28R can operate as a flexible 
2x8 distrubution amp, or as a complete 8-zone page-over-music routing 
system.  The DA28R carries a five-year warranty. 
 

DA28R

 features include: 

♦

  two electronically balanced, differential mic/line inputs 

♦

  pad switch, trim control, & peak indicator on each input 

♦

  24 volt phantom power switch on each input channel 

♦

  eight electronically balanced & floating line outputs 

      (600 ohm line output drive capability) 

♦

  screwdriver adjustable level control for each output 

♦

  sixteen logic inputs with invert function switches 

      (mute/assign inputs to outputs via external switches) 

♦

  inputs & outputs on plug-in barrier strip connectors 

♦

  optional input and output isolation transformers 

♦

  covered by Biamp Systems’ five-year warranty 

♦

 marked and 

UL

 / 

C-UL

 listed power source