dbx 120A User Manual Download Page 7

®

Introduction

120A

120A User Manual

If you require technical support, contact dbx Customer Service. Be prepared to accurately
describe the problem. Know the serial number of your unit.  This is printed on a sticker attached
to the rear panel. If you have not already taken the time to fill out your warranty registration
card and send it in, please do so now.

Before you return a product to the factory for service, we recommend you refer to the manu-
al. Make sure you have correctly followed installation steps and operation procedures. If you
are still unable to solve a problem, contact our Customer Service Department at (801) 568-7660
for consultation. If you need to return a product to the factory for service, you 

MUST

contact

Customer Service to obtain a Return Authorization Number. 

No returned products will be accepted at the factory without a Return Authorization Number. 

Please refer to the warranty below, which extends to the first end-user. After expiration of the
warranty, a reasonable charge will be made for parts, labor, and packing if you choose to use
the factory service facility. In all cases, you are responsible for transportation charges to the fac-
tory. dbx will pay return shipping if the unit is still under warranty.

Use the original packing material if it is available. Mark the package with the name of the ship-
per and with these words in red: DELICATE INSTRUMENT, FRAGILE! Insure the package prop-
erly. Ship prepaid, not collect. Do not ship parcel post.

This warranty is valid only for the original purchaser and only in the United States. 

1).

The warranty registration card that accompanies this product must be mailed within 30 days
after purchase date to validate this warranty.  Proof-of-purchase is considered to be the bur-
den of the consumer.

2).

dbx warrants this product, when bought and used solely within the U.S., to be free from
defects in materials and workmanship under normal use and service. 

3).

dbx liability under this warranty is limited to repairing or, at our discretion, replacing defec-
tive materials that show evidence of defect, provided the product is returned to dbx WITH
RETURN AUTHORIZATION from the factory, where all parts and labor will be covered up
to a period of two years.  A Return Authorization number must be obtained from dbx by
telephone. The company shall not be liable for any consequential damage as a result of the
product's use in any circuit or assembly.

4).

dbx reserves the right to make changes in design or make additions to or improvements
upon this product without incurring any obligation to install the same additions or
improvements on products previously manufactured.

5).

The foregoing is in lieu of all other warranties, expressed or implied, and dbx neither
assumes nor authorizes any person to assume on its behalf any obligation or liability in con-
nection with the sale of this product.  In no event shall dbx or its dealers be liable for spe-
cial or consequential damages or from any delay in the performance of this warranty due
to causes beyond their control.

0.3 Warranty

0.2 Service Contact Info

ii

Summary of Contents for 120A

Page 1: ...120A Subharmonic Synthesizer with Modeled Waveform Synthesis User Manual...

Page 2: ...or equiv alent This Equipment is intended for rack mount use only SAFETY INSTRUCTIONS NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED WITH A POWER CORD WARNING THIS APPLIANCE MUST BE EARTHED The cores...

Page 3: ...osionsfara vid felaktigt batteribyte Anv nd samma batteri typ eller en ekvivalent typ som rekommenderas av apparattil lverkaren Kassera anv nt batteri enligt fabrikantens instruk tion IMPORTANT SAFETY...

Page 4: ...ntact Info ii 0 3 Warranty ii Section 1 Operation and Appendix 1 1 Rear Panel Connections 1 1 2 Front Panel Connections 1 1 3 Operating Notes 2 1 4 Basic Connection 4 Appendix A 1 Block Diagram 5 A 2...

Page 5: ...INTRO CUSTOMER SERVICE INFO 120A DEFINED WARRANTY INFO INTRODUCTION 120A...

Page 6: ...ge you to experiment and find cre ative ways that the 120A can help you optimize your specific application The 120A s patented modeled Waveform Synthesis process builds a synthesized waveform using th...

Page 7: ...d not collect Do not ship parcel post This warranty is valid only for the original purchaser and only in the United States 1 The warranty registration card that accompanies this product must be mailed...

Page 8: ...120A...

Page 9: ...input section of the 120A offers electronically balanced unbalanced 1 4 connections with a nominal input level of 4dBu and clipping level is at 22dBu into 600 The 120A also offers RCA input connector...

Page 10: ...s are bottoming out making a ticking popping sound or fuses are blowing or your amp is clipping try turning down the 24Hz 36Hz level You may find that a setting produces fine results in one room but p...

Page 11: ...them maximally different If you do reposition your speakers you should also reset any output level controls on the back of the speaker cabinet Many speakers offer a slight HF or MF boost with these c...

Page 12: ...he ampli fication for the main speakers to Channel 1 and Channel 2 Output Jacks Operation without a Subwoofer Set the OUTPUT switch to FULL RANGE and connect the amplification for the main speakers to...

Page 13: ...Block Diagram Appendix 120A Appendix 24 36Hz 36 56Hz A 1 Block diagram 5...

Page 14: ...26 36Hz and 36 56Hz Band Synthesis Level Subharmonics Low Frequency Boost Subwoofer Output Crossover Frequency Select Crossover in out Indicators Power Crossover Bypass Metering Synthesis activity 3 L...

Page 15: ...20A s input and output The best start ing point is to ground the shield of the input cable at the source device leaving it unconnected at the 120A Output Cable Configurations The 120A will drive eithe...

Page 16: ...andy Pkwy Sandy Utah 84070 Phone 801 568 7660 Fax 801 568 7662 Questions or comments E mail us at customer dbxpro com or visit our World Wide Web home page at www dbxpro com A Harman International Com...

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