Broadcast Tools AHR-1 Plus User manual

Installation and Operation Manual
PROBLEM SOLVED
Due to the dynamic nature of product design, the information contained in this
document is subject to change without notice. Broadcast Tools, Inc., assumes no
responsibility for errors and/or omissions contained in this document. Revisions
of this information or new editions may be issued to incorporate such changes.
Broadcast Tools® is a registered trademark of Broadcast Tools,Inc.
All Sentinel® labeled products are registered trademarks of Broadcast Tools,Inc.
Copyright® 1989 - 2021 by Broadcast Tools,Inc. All rights reserved.
No part of this document may be reproduced or distributed without permission.
Visit www.broadcasttools.com for important product update information.
Manual update: Manual Revised 6/28/2021
If you need a firmware upgrade, contact Broadcast Tools®
No part of this document may be reproduced or distributed without permission.
ALL SPECIFICATIONS AND FEATURES FOR THIS PRODUCT ARE SUBJECT TO
CHANGE WITHOUT NOTICE
NOTE: We recommend the use of Chrome, Firefox or Safari as your browser.
AHR-1 Plus
Headphone Amplifier
INC
®

e-mail: [email protected] voice: 360.854.9559 fax: [phone]
AHR-1 Plus Installation and Operation Manual
Table of Contents
Section Title Page #
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Who to Contact for Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation/Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Front and Rear Panel Drawings . . . . . . . . . . . . . . . . . . . . . Appendix A
Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix B
Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix C
WEBSITE:
Visit our web site for
product updates and
additional information.
2
CONTENTS

e-mail: [email protected] voice: 360.854.9559 fax: [phone]
AHR-1 Plus Installation and Operation Manual
SAFETY
SAFETY INFORMATION
Only qualified personnel should install Broadcast Tools® products. Incorrect or inap-
propriate use and/or installation could result in a hazardous condition.
WHO TO CONTACT FOR HELP
If you have any questions regarding your product or you need assistance, please con-
tact your distributor from whom you purchased this equipment. If you would like
more information about BROADCAST TOOLS® products, you may reach us at:
Broadcast Tools, Inc.
131 State Street
Sedro-Woolley, WA 98284-1503 USA
Voice: 360.854.9559
Fax: [phone]
Internet Home Page: www.broadcasttools.com
E-mail:[email protected]
THANK YOU FOR CHOOSING
BROADCAST TOOLS® BRAND PRODUCTS!
CAUTION!
Broadcast Tools®
Products, as with any
electronic device, can
fail without warning.
Do not use this product
in applications where a
life threatening condition
could result due to failure.
NOTE:
This manual should be
read thoroughly before
installation and operation.
WEBSITE:
Visit our web site for
product updates and
additional information.
Broadcast Tools is a Veteran Owned Business
Designed, Assembled and Supported in WA State, USA

e-mail: [email protected] voice: 360.854.9559 fax: [phone]
AHR-1 Plus Installation and Operation Manual
OVERVIEW
Product Overview
The Active Headphone Remote 1 Plus (AHR-1 Plus) contains a balanced stereo line-
level input and stereo headphone amplifier output designed to work with any com-
bination of high efficiency headphones with impedances between 24 and 600 ohms.
The AHR-1 Plus can be used as a standalone headphone listening station or within
a distributed headphone system. The AHR-1 Plus is equipped with 3.5mm (1/8") and
1/4" headphone jacks; front panel level control and LED power indicator. Two rear
panel RJ45 jacks are provided for connection via CAT5/6 cable conforming to the
standard RJ45 audio wiring format. For standalone applications, 1/4" T/R/S input
jacks are provided to accept balanced or unbalanced stereo input audio. Power is
provided by an included +/-15 VDC universal power supply with IEC inlet. The
AHR-1 Plus may be desktop mounted, under counter mounted with the optional
“MP-S Under” bracket, or turret/counter-top mounted with the optional “MP-S” or
“MP-S-XLR” mounting plates.
WEBSITE:
Visit our web site for
product updates and
additional information.

e-mail: [email protected] voice: 360.854.9559 fax: [phone]
AHR-1 Plus Installation and Operation Manual
CAUTION!
RFI and surge sup-
pression suggestions
Installation of the
AHR-1 Plus in high RF
environments should be
performed with care. It
is recommended that all
cables connected to the
AHR-1 Plus be looped
through ferrite cores to
suppress RF. Surge pro-
tection with RF filter-
ing is also suggested.
For lightning protec-
tion devices, check out
www.polyphaser.com
and www.itwlinx.com.
WEBSITE:
Visit our web site for
product updates and
additional information.
INTRODUCTION
Introduction
Thank you for your purchase of the AHR-1 Plus, active headphone remote, which
we will refer to throughout the manual as the AHR-1 Plus. We are confident this
product will give you many years of dependable service. This manual is intended to
give you all the information needed to install and operate the product.
Inspection
Please examine your AHR-1 Plus carefully for any damage that may have been sus-
tained during shipping. If any is noted, please notify the shipper immediately and
retain the packaging for inspection by the shipper. The package contains the AHR-
1 Plus and +/- 15-volt DC @ 500 mA desktop universal switching (PS-1515/IEC)
power supply with IEC AC inlet. Manuals may be downloaded from our web site.
Installation/Operation
POWER: +/- 15 VDC power connector
Connect the 3-pin AMP-style latching power connector to the unit and the +/-15
VDC switching power supply with domestic connector into a 120 Vac 50-60 Hz
power source. Never use any type of power supply other than the specified/supplied
(PS-1515/IEC) power supply. Alternatively, the AHR-1 Plus can be powered via its
RJ45 jacks. See the “RJ45 Jacks” section of this manual for more information.
Balanced Stereo Audio Input (1/4” TRS)
Connect a balanced stereo audio source to the ¼” TRS jacks on the back of the
AHR-1 Plus, labelled “Left” and “Right” respectively. When connecting unbalanced
sources, tie the ring and sleeve together for ground and the tip is the high signal side.
¼” TRS pin-out
Tip = Positive,
Ring = Negative
Sleeve = Ground.
Note: When plugged in the ¼” TRS connections will disconnect the RJ45 audio con-
nectors from the headphone amplifier section of the AHR-1 Plus.

e-mail: [email protected] voice: 360.854.9559 fax: [phone]
AHR-1 Plus Installation and Operation Manual
INSTALLATION
RJ45 Jacks (Audio and Power IN/OUT)
The AHR-1 Plus has two RJ45 jacks that follow standard for audio and power over
Cat5/6 cabling. This allows the AHR-1 Plus to be connected to and powered from
legacy Broadcast Tools FlexPhones Master systems as well as for custom installa-
tions using RJ-45 connectors for audio and/or power. The jacks are connected in par-
allel so that two units can be daisy-chained together.
Stereo RJ45 Audio Pinout:
Please use shielded twisted pair Cat5e or Cat6 cables and connectors (STP) with the
input and output RJ45 audio jacks.
Mounting Options
The AHR-1 Plus may be desktop mounted using the included adhesive Velcro feet.
Under counter mounting is possible using the optional “MP-S Under” bracket.
Turret or inset counter-top mounting is possible using the optional “MP-S” or “MP-
S-XLR” mounting plates.
Headphone Level Control
Use this to adjust the volume of the headphone audio.
Headphone Connections
The AHR-1 Plus provides front-panel two headphone jack connections, one for
headphones that use 3.5mm (1/8”) stereo connectors and one for headphones that
use ¼” stereo connectors. Only one set of headphones should be connected to the
AHR-1 Plus at a time. Only use stereo headphones with impedances between 24 and
600 ohms
NOTE: 8 ohm and/or monaural headphones should not be used with this product.
WEBSITE:
Visit our web site for
product updates and
additional information.

e-mail: [email protected] voice: 360.854.9559 fax: [phone]
AHR-1 Plus Installation and Operation Manual
SPECIFICATIONS
Specifications
Input Level -15 to +4 dBu nominal. MIL+21dBu, balanced, bridging 10k .
Frequency Response 20Hz to 20 kHz; +/- .0.25dB
Signal/Noise Ratio >85 dB nominal, weighted 10 to 22Khz.
Distortion 0.005% THD, nominal.
IMD (250/7kHz) 0.005% IMD, nominal.
Headphone Output 24 to 600 headphones. 200 mW nominal.
Operation/Control Front panel - Headphone level control.
Status Front Panel – Power LED indicator driven by both power supply
rails.
Interfacing Balanced stereo audio input via ¼” TRS jacks or RJ45 connectors.
Headphone output: 3.5mm (1/8”) and ¼” stereo headphone jacks.
Power Standalone: PS-1515/IEC desktop universal switching power supply
with IEC inlet included. +/-15 VDC 500mA output with 3-pin AMP-style
latching power connector.
RJ45: User provided power via CAT5/6 cabling, bi-polar +\-15 to
24 VDC @100ma.
Mechanical 5.00 x 3.80 x 1.50 in. (L x W x H), Weight: 1.0 lbs.
Options Under-table mounting bracket: “MP-S Under”
Counter/turret mounting plate: “MP-S”
Counter/turret mounting plate w/XLR jack cutout: “MP-S XLR”
WEBSITE:
Visit our web site for
product updates and
additional information.

8
AHR-1 Plus Installation and Operation Manual
LIMITED WARRANTY
LIMITED WARRANTY
The term “Buyer” as used in this document refers to and includes both (but only) (a) any person or entity who acquires such an item for
the purpose of resale to others (i.e., a dealer or distributor of an item), and (b) the first person or entity who acquires such an item for
such person’s or entity’s own use.
Broadcast Tools warrants to each Buyer of any item manufactured by Broadcast Tools that the item will be free from defects in materials
and workmanship at the time it is shipped by Broadcast Tools if the item is properly installed, used and maintained.
EXCLUSIVE REMEDIES
If Broadcast Tools is notified, in writing, of a failure of any item manufactured by Broadcast Tools to conform to the foregoing Limited
Warranty within one (1) year following the date of the Buyer’s acquisition of the item, and if the item is returned to Broadcast Tools in
accordance with Broadcast Tools’ instructions for confirmation by inspection of the defect (which at Broadcast Tools’ election may
include, without limitation, a requirement that the Buyer first obtain a Return Authorization number from Broadcast Tools, that the Buyer
furnish proof of purchase in the form of an invoice and/or receipt, and that the Buyer prepay all freight charges associated with any return
of the item to Broadcast Tools using such freight service as Broadcast Tools reasonably may specify), Broadcast Tools will repair or
replace the defective item, or will refund the purchase price paid by the Buyer for the item. Broadcast Tools shall have the exclusive
right to choose between these alternative remedies.
NO OTHER WARRANTIES OR REMEDIES
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, BROADCAST TOOLS AND ITS SUPPLIERS DISCLAIM ALL OTHER
WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABIL-
ITY OR FITNESS FOR A PARTICULAR PURPOSE; AND THE FOREGOING ALTERNATIVE REMEDIES SHALL BE EXCLUSIVE OF
ALL OTHER REMEDIES. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS. YOU MAY HAVE OTHER RIGHTS,
WHICH VARY FROM STATE/JURISDICTION TO STATE/JURISDICTION.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, NEITHER BROADCAST TOOLS NOR ANY OF ITS SUPPLIERS
SHALL HAVE ANY LIABILITY FOR ANY SPECIAL, INCIDENTAL, INDIRECT, CONSEQUENTIAL OR PUNITIVE DAMAGES WHATSO-
EVER (INCLUDING, WITHOUT LIMITATION, ANY DAMAGES FOR LOST PROFITS, BUSINESS INTERRUPTION, LOSS OF DATA OR
INFORMATION, COST OF CAPITAL, CLAIMS OF CUSTOMERS, OR ANY OTHER PECUNIARY LOSS) ARISING OUT OF THE USE
OF OR THE INABILITY TO USE ANY ITEM SUPPLIED BY BROADCAST TOOLS, EVEN IF BROADCAST TOOLS HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES HAVE ANY LIABILITY FOR ANY SPECIAL, INCIDENTAL, CONSEQUENTIAL,
EXEMPLARY OR PUNITIVE DAMAGES. THIS LIMITATION OF LIABILITY APPLIES WHETHER A CLAIM IS ONE ALLEGING
BREACH OF A CONTRACT OR WARRANTY, NEGLIGENCE OR OTHER TORT, FOR THE VIOLATION OF ANY STATUTORY DUTY,
THE FAILURE OF ANY LIMITED OR EXCLUSIVE REMEDY TO ACHIEVE ITS ESSENTIAL PURPOSE, OR ANY OTHER CLAIM OF
ANY NATURE. BECAUSE SOME STATES AND JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY
FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, THIS LIMITATION MAY NOT APPLY TO YOU.
Broadcast Tools, Inc.
131 State Street
Sedro-Woolley, WA 98284 • USA
360.854.9559 voice •866.783.1742 fax
[email protected] e-mail
www.broadcasttools.com website
e-mail: [email protected] voice: 360.854.9559 fax: [phone]

e-mail: [email protected] voice: 360.854.9559 fax: [phone]
AHR-1 Plus Installation and Operation Manual
9
APPENDIX

e-mail: [email protected] voice: 360.854.9559 fax: [phone]
Product_Name Installation and Operation Manual
Active Headphone Re
m
AHR-1 Plus
Component Layout
Left 1/4” T/R/S
Balanced Input
Right1/4” T/R/S
Balanced Input
Balanced Stereo Input
RJ45 Audio Jacks
Power
+/- 15VDC
mote
Fax [phone]
Reserved.
Headphone Level Control
1/8” T/R/S Headphone Jack 1/4” T/R/S Headphone Jack Power LED
131 State Street, Sedro-Woolley, WA 98284 • 360.854.9559 •
Visit us online at www.broadcasttools.com
Copyright © 1989-2021 by Broadcast Tools, Inc. All Rights R
Modified 07/08/21
10
APPENDIX

e-mail: [email protected] voice: 360.854.9559 fax: [phone]
Product_Name Installation and Operation Manual
Functional Diagram
AHR-1Plus
Active Headphone Remote
1/4”T/R/S
Left Balanced Input
Stand-Alone
1
RJ-45
2
3
6
Headphone
Level
Headphone
Jack 1/4”
Headphone
Jack 3.5mm/1/8”
1/4”T/R/S
Right Balanced Input
Stand-Alone
2x CAT5/6
PS1515
Power Supply
+15VDC
-15VDC
PWR
PS
11
APPENDIX