Presonus Audio electronic ADl 600 User Manual

USER’S MANUAL

version 1.0

© 2005, PreSonus Audio Electronics, Incorporated.

All rights reserved.

WARRANTY

PreSonus Limited Warranty

PreSonus Audio Electronics Inc. warrants this product to be free of defects in material
and workmanship for a period of one year from the date of original retail purchase.
This warranty is enforceable only by the original retail purchaser. To be protected by
this warranty, the purchaser must complete and return the enclosed warranty card
within 14 days of purchase. During the warranty period PreSonus shall, at its sole
and absolute option, either repair or replace, free of charge, any product that proves
to be defective on inspection by PreSonus or its authorized service representative.
To obtain warranty service, the purchaser must first call or write PreSonus at the
address and telephone number printed below to obtain a Return Authorization
Number and instructions of where to return the unit for service. All inquiries must be
accompanied by a description of the problem. All authorized returns must be sent to
the PreSonus repair facility postage prepaid, insured and properly packaged.
PreSonus reserves the right to update any unit returned for repair. PreSonus
reserves the right to change or improve the design of the product at any time without
prior notice. This warranty does not cover claims for damage due to abuse, neglect,
alteration or attempted repair by unauthorized personnel, and is limited to failures
arising during normal use that are due to defects in material or workmanship in the
product. Any implied warranties, including implied warranties of merchantability and
fitness for a particular purpose, are limited in duration to the length of this limited
warranty. Some states do not allow limitations on how long an implied warranty lasts,
so the above limitation may not apply to you. In no event will PreSonus be liable for
incidental, consequential or other damages resulting from the breach of any express
or implied warranty, including, among other things, damage to property, damage
based on inconvenience or on loss of use of the product, and, to the extent permitted
by law, damages for personal injury. Some states do not allow the exclusion of
limitation of incidental or consequential damages, so the above limitation or exclusion
may not apply to you. This warranty gives you specific legal rights, and you may also
have other rights, which vary form state to state. This warranty only applies to
products sold and used in the United States of America. For warranty information in
all other countries please refer to your local distributor.

PreSonus Audio Electronics, Inc.
7257 Florida Blvd.
Baton Rouge, LA 70806
[phone]
[phone]
www.presonus.com

© 2005, PreSonus Audio Electronics, Incorporated. All rights reserved.

TABLE OF CONTENTS

1 Overview

1.1 Introduction 4

1.2 Features 5

2 Controls & Connections

2.1 Front Panel Layout 6

2.3 Back Panel Layout 8

2.4 Power and Ground 8

3 Operation

3.1 Input Sources 9

3.2 Microphones 9

3.3 Instruments 9

3.4 Line input 9

3.5 Hook up diagrams 10

1. Two Microphones 10

2. Bass Guitar (two channels) 10

3. Keyboards, Syths, Drum Machines 11

4. Stereo buss signal conditioning 11

3.6 Applications 12

1. Piano 12

2. Electric Guitar 13

3. Acoustic Guitar 14

4. Bass Guitar 15

5. Drum Overheads 16

6. Snare Drum 17

4 Technical

4.1 Block Diagram 18

4.2 Specifications 19

3

1 OVERVIEW

1.1 INTRODUCTION

Thank you for purchasing the PreSonus ADL 600. The ADL 600 utilizes the
highest quality components to insure optimum performance for an infinite period
of time. We believe the ADL 600 to be an exceptional-sounding microphone
preamplifier and an exceptional value. We encourage you to contact us at 1-800­750-0323 with any questions or comments you may have regarding your
PreSonus equipment. PreSonus Audio Electronics is committed to constant
product improvement, and we value your suggestions highly. We believe the
best way to achieve our goal of constant product improvement is by listening to
the real experts, our valued customers. We appreciate the support you have
shown us through the purchase of this product.

Please pay close attention to how you connect your ADL 600 to your system.
Improper grounding or bad cables are the most common cause of noise
problems found in studio or “live” sound environments.

We would like to suggest that you use this manual to familiarize yourself with the
features, applications and correct connection procedure for your ADL 600 before
trying to hook it up to your system. Thank you, once again, for buying our
product and may we wish you good luck, and enjoy your ADL 600!

4

OVERVIEW

1.2 FEATURES

The following information is a summary of your ADL 600’s features:

All Tube, Dual Transformer Microphone Pre-Amplifier

a discrete Class A high voltage all tube, dual-transformer microphone
preamplifier designed for high gain (+73dB), high headroom (+30dB), low
noise (-100dB S/N ratio) and ultimate sonic performance – great for all types
of recording applications.

• Microphone Input / Instrument Input / Line Input. Three different
types of inputs are provided on the ADL 600 for maximum flexibility. You
can connect microphones, instruments, keyboards as well as run your
entire mix through the ADL 600 during mix-down or mastering for signal
conditioning.

• Variable Microphone Input Impedance. This feature enables you to
“tune” your microphone – experiment with different input impedances to
create different sounds from your microphones. Changing the input
impedance can be the perfect solution for a given recording application.

• +48 Volt Phantom Power. The ADL 600 has +48V phantom power
available. This assures optimum performance of your condenser
microphones that require phantom power.

• -20dB PAD. A -20dB pad is available for reducing the in-coming signal
level. This pad provides a more manageable signal from high output
devices or extremely loud sources (drums) giving greater control over
the in-coming signal to avoid clipping or distortion during recording.

. Your ADL 600 is

• Polarity Invert. Use the phase invert switch to combat phase
cancellation with other open microphones.

• Hi-Pass Filter. To reduce unwanted low-frequency boom, or room
rumble.

• VU Meter. The analog VU meter provides an accurate reading of the
output level.

• LED Metering. Eight segment LED meters for detecting peaks and fast
transients of the output level.

5

2 CONTROLS & CONNECTIONS

2.1 FRONT PANEL LAYOUT

The front panel of the ADL 600 is laid out so that if you split the front panel
down the middle the controls and metering for channel 1 are on the left hand
side and the controls and metering for channel 2 are on the right hand side.
The following is a description of the controls for each channel:

INPUT: Selects the input source (Instrument, Line, or Microphone) The
microphone input has four different input impedance values to select from (1500,
900, 300 and 150 ohms). As the ADL 600’s impedance is lowered, different
filtering effects can result delivering a tailored sound for a particular application.

When using the Line input, the following microphone preamplifier features are
bypassed: +48V, -20dB PAD and input impedance.

HP FILT: Three position rotary switch to select the frequency for the HIGH PASS
FILTER (40Hz, 80Hz and 120Hz). When the FILTER switch is engaged all
frequencies below the selected HP FILT setting are attenuated (dropped) by
12dB. This filter can be handy in live and studio applications. For example, a high
pass filter can help to reduce the “boominess” or “muddiness” of a vocal and
improve the overall clarity.

GAIN: Eight-position industrial grade rotary switch providing 35dB of gain in 5dB
steps. TRIM: Variable potentiometer (+/-10dB) to offer fine trim adjustment to the
final stage of the ADL 600.

INSTRUMENT: ¼” TS connector. When an instrument is plugged into the
instrument input, the microphone preamplifier is bypassed and the ADL 600
becomes an active instrument preamplifier.

6