LaChapell Audio 983M User Manual

LACHAPELL AUDIO 983M

USER GUIDE

Single Channel Half Rack Vacuum Tube

Preamplifier for Microphones and Instruments

Version 1

February 2019

1266 Park Road
Chanhassen, MN 55317
952-401-7700

[e-mail]
www.digitalaudio.com

SAFETY INSTRUCTIONS

TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. CONTACT DIGITAL AUDIO LABS
FOR SERVICING.

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user
to the presence of uninsulated and/or potentially dangerous voltage within the products enclosure
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 operating and maintenance (servicing) instructions in the literature accompanying the
appliance.

POWER CORD NOTICE FOR INTERNATIONAL OPERATION
Please call Digital Audio Labs Support at 952-401-7700.

IMPORTANT SAFETY INSTRUCTIONS

1. Read and understand this entire manual.

2. Keep this manual available for reference.

3. Heed all warnings and precautions in this manual and notices marked on the product.

4. Do not use this product near water or damp environments.

5. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

6. Provide for proper airflow around product. Do not install near products that produce high levels
of heat. Do not expose the unit to direct sun light or heating units as the internal components
temperature may rise and shorten the life of the components.

7. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding type plug has two blades and a third grounding
prong.

8. Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles, and the point where they connect to the product. Do not use the unit if the electrical
power cord is frayed or broken.

9. Only use attachments/accessories specified by the manufacturer.

10. Unplug this product during lightning storms or when unused for long periods of time.

11. Refer all servicing to qualified service personnel.

12. The product shall not be exposed to moisture. Do not touch the unit with wet hands. Do not handle
the unit or power cord when your hands are wet or damp.

13. The product should be connected to a power supply only of the type described in the operating
instructions or as marked on the product.

CARE

• From time to time you should wipe off the front and side panels and the cabinet with a dry soft
cloth. Do not use rough material, thinners, alcohol or other chemical solvents or cloths since this may
damage the finish or remove the panel lettering.

• The manufacturer cannot be held responsible for damages caused to persons, personal possessions,
or data due to an improper use of product.

LACHAPELL AUDIO MODEL 983M

DIGITAL AUDIO LABS LIMITED WARRANTY

Digital Audio Labs warrants their products against defects in material and workmanship for a period of two years
from date of purchase. During this period, Digital Audio Labs will, at its option, repair the defective unit or replace
it with a new or rebuilt one.

The warranty does NOT cover:

• Damage due to abuse, misuse, or accident.

• Damage due to operation contrary to the instructions in the product instruction manual.

• Units on which the product serial number has been removed or altered.

• Units that have been serviced by unauthorized personnel.

All implied warranties, including warranties on merchantability and fitness, are limited in time to the length of
this warranty. Some states do not allow time limitations on implied warranties, so this limitation may not apply
to you. Digital Audio Labs’ liability is limited to the repair or replacement of its product. Digital Audio Labs shall
in no way be held liable for incidental or consequential damages resulting from the use of their product or
its software, including, without limitation, damages from loss of business profits, business interruption, loss of
business information or other pecuniary loss. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation or exclusion may not apply to you.

REPAIR POLICY

Please do not return the product without obtaining an RMA number first. Contact Digital Audio Labs at support@

digitalaudio.com to acquire an RMA number. Do not return the product to the place of purchase. Please write

the RMA number on the outside of the shipping carton. Any product sent to us without a valid RMA number will
be refused. Include the following with the product: a brief description of the problem, your name, return shipping
address, phone number and the RMA number. Do not include any accessories. DAL is not responsible for any
damage to or loss of the product during transit. We recommend that customers obtain a receipt and tracking
number for all packages shipped to us. Turnaround time on repairs is generally ten business days. If you live
outside of the United States, please contact your local distributor for warranty service.

Please return product to:
Digital Audio Labs
Attn: RMA Number
1266 Park Road
Chanhassen, MN 55317
USA

WARRANTY SERVICE

You will be required to pay the shipping charges when you ship your product to DAL. Digital Audio Labs will
pay for return shipping with a shipper of their choosing. We reserve the right to inspect any product that may
be the subject of any warranty claim before repair is carried out. For warranty service, we may require proof of
the original date of purchase if you have not registered your product with DAL. Final determination of warranty
coverage lies solely with Digital Audio Labs.

NON-WARRANTY SERVICE

If it is determined that the product does not meet the terms of our warranty, you will be billed for labor, materials,
return freight and insurance. There is a $80 USD minimum charge for materials and labor. Appropriate shipping
charges will be applied. We require payment in advance of repair by credit card; we accept Visa and Master
Card. In the event the charges are over the minimum charge, DAL will contact you and inform you of the cost of
the repair before any work is completed.

LACHAPELL AUDIO MODEL 983M

1

CONTENTS

SAFETY INSTRUCTIONS ................................................................................................................................................................. II

IMPORTANT SAFETY INSTRUCTIONS ............................................................................................................................. II

CARE ........................................................................................................................................................................................... II

DIGITAL AUDIO LABS LIMITED WARRANTY ........................................................................................................................1

REPAIR POLICY .......................................................................................................................................................................1

WARRANTY SERVICE ...........................................................................................................................................................1

NON-WARRANTY SERVICE ...............................................................................................................................................1

INTRODUCTION ...............................................................................................................................................................................3

BEFORE YOU GET STARTED ........................................................................................................................................................3

SAFETY PRECAUTIONS ........................................................................................................................................................4

CONTROLS ........................................................................................................................................................................................5

CONTROL DETAILS ..............................................................................................................................................................5

GETTING STARTED ..........................................................................................................................................................................6

983 FREQUENCY RESPONSE .....................................................................................................................................................7

HPF - 50HZ .................................................................................................................................................................................7

HPF - 150HZ...............................................................................................................................................................................7

LPF - 5KHZ ..................................................................................................................................................................................7

LPF - 10KHZ ...............................................................................................................................................................................7

LACHAPELL AUDIO 983M SPECIFICATIONS ......................................................................................................................8

LACHAPELL AUDIO SUPPORT ...................................................................................................................................................8

LACHAPELL AUDIO MODEL 983M