Radial Engineering Presenter Users Manual

PRESENTER

Microphone & laptop
presentation Mixer

Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5

Tel: [phone] • Fax: [phone] • Email: [e-mail]

TM

presenter
Microphone & laptop presentation Mixer

Introduction ....................................................................................... 1

Features ........................................................................................ 2-3

Overview........................................................................................... 4

Making Connections ...................................................................... 5-8

Recording with the Presenter ........................................................... 9

Specications ................................................................................. 10

Block Diagram .................................................................................11

Radial Limited Warranty ...................................................Back Cover

Thank you for purchasing the Radial Presenter™, a microphone and laptop presentation mixer that
allows you to easily provide high quality audio for any event, lecture, or presentation.

While the Presenter has been designed to be easy to use, we encourage you to read through this

short manual to become familiar with the various features and how to use them. If you nd yourself

with unanswered questions, please visit our website at www.radialeng.com. This is where we post
frequently asked questions and product updates. If you still require assistance, send us an email at
[e-mail] and we will do our best to respond promptly.

Radial Engineering Ltd. Presenter™ User Guide

1

FEATURES

1 2 3 4 5 6

1. MIC LEVEL: Gain control sets the
microphone input level.

2. LOW CUT: 3-position switch rolls
off excessive low frequencies.

3. EQ: Low and High controls allow
you to adjust the tone of the
microphone.

4. AUDIO PROGRAM LEVEL: Con­trols the level of the USB audio
input and the 3.5mm input.

5. 3.5mm PROGRAM INPUT: Mini
1/8” TRS input allows you to play­back audio from a smartphone or
tablet.

6. POWER INDICATOR: Illuminates
when the Presenter is receiving
power via USB.

Radial Engineering Ltd. Presenter™ User Guide

2

FEATURES

7 8 9 10 11 12 13

7. USB: Provides power for the
Presenter and allows playback of
high quality audio from a laptop.

8. MONO: Sums the left and right
outputs to mono.

9. MAIN OUTPUTS: Balanced XLR
line outputs connect directly to
powered PA speakers.

10. LIFT: Ground lift switch discon­nects ground on pin-1 at the XLR
outputs to remove buzz and hum.

11. 48V: Recessed switch engages
phantom power for condenser
microphones.

12. MIC INPUT: Balanced XLR input
to connect a microphone.

13. KENSINGTON SLOT: Allows the
Presenter to be secured with a
Kensington Lock to prevent theft.

Radial Engineering Ltd. Presenter™ User Guide

3

OVERVIEW

The Presenter combines a microphone preamp and a USB program input to create the ultimate
interface for any presentation, from school lectures to corporate audio. An XLR mic input allows you
to connect a podium microphone and provide it with phantom power. The mic signal can then be ad-

justed using three EQ controls: a high-pass lter rolls off excessive low end, and Low and High knobs

allow you to tailor the frequency response. A program input level controls the volume of the USB input
or the 3.5mm jack on the front of the unit, so you can connect the outputs of your laptop, smartphone,
or tablet and blend it with the signal from the microphone. XLR outputs provide balanced feeds for
a set of powered speakers, providing an all-in-one portable solution for any speaking engagement.

XLR

USB

3.5mm

Radial Engineering Ltd. Presenter™ User Guide

4

MAKING CONNECTIONS

Powering the Presenter

Before connecting the Presenter, ensure that your devices are turned down and powered off, to pre­vent plug-in transients from damaging sensitive speaker components such as tweeters.

The Presenter is powered via a USB cable, connected either to a laptop computer or a separate AC
power adapter. Once connected to power, the LED on the top panel of the Presenter will illuminate
and the device will be ready to use.

USB power adapter not included

Radial Engineering Ltd. Presenter™ User Guide

5

The Main Outputs

The Presenter features two line-level XLR outputs to feed a set of powered speakers or the line in­puts of a PA system. These are balanced, low impedance outputs that can be sent distances of up to
100m (300’) without signal loss or noise. Connect to your sound system using standard XLR cables,
then turn on your speakers and turn up the volume. Should you encounter buzz or hum caused by
a ground loop, engage the LIFT switch on the rear of the Presenter to disconnect the pin-1 audio
ground connection and help eliminate the noise. If you wish to have your audio playback in mono, or
if you are only connecting to a single powered speaker, engage the MONO switch next to the USB
input. With the mono switch engaged, the same signal will be present on both the left and right XLR
outputs.

MONO

pressed in

Radial Engineering Ltd. Presenter™ User Guide

6

The Microphone Input & Tone Controls

The MIC INPUT on the Presenter allows you to connect to your microphone using a standard XLR ca­ble. This input is compatible with handheld and podium mics, or the output of a wireless microphone
receiver. If your microphone requires 48V phantom power to operate, simply engage the recessed
48V switch before turning up your levels – a red LED will illuminate on the back of the Presenter to
let you know that phantom power is active. The MIC IN knob will set the overall output level of the
microphone.

Dynamic Podium Lavier

Three tone shaping controls are also provided to tailor the sound of the microphone to suit the

environment or the timbre of the speaker. The LOW CUT switch allows you to engage a lter

that eliminates excessive low frequencies: the middle setting on this three-position switch rolls
off frequencies below 80Hz, while the lowest setting rolls off below 120Hz. The LOW and HIGH
controls are shelving equalizers that allow you to boost or cut the low and high frequencies.
Start with these controls at 12 o’clock and adjust to suit when
speaking into the microphone and listening to the output of your
speakers – the EQ settings can go a long way towards increas­ing the clarity of your voice in the room.

Radial Engineering Ltd. Presenter™ User Guide

7

3.5mm Input

The input on the front of the Presenter allows you to easily con­nect a smartphone or tablet for audio playback through your
sound system. Use a standard 3.5mm (1/8”) TRS cable to con­nect your device to the Presenter, and slowly turn up the AUDIO
PROGRAM level control until you’ve reached the desired play­back volume. Note that when a cable is connected to the 3.5mm
jack, this input will take priority over the USB input, and any audio
being played back over the USB connection will be muted.

The USB Input

The USB input on the Presenter allows you to playback audio
from a laptop computer, utilizing high quality digital converters
that are capable of sample rates up to 96kHz. This makes the
Presenter ideal for playing a music playlist at a wedding recep-

tion, or audio les within a PowerPoint® slideshow for a lecture.

TYPE A USB

Fits most laptops and computers

Radial Engineering Ltd. Presenter™ User Guide

TYPE B USB

Used to connect to the Presenter

8

The Presenter is a plug and play device, with no drivers required to work with either a Mac or a PC.
Once connected to your computer via USB, the Presenter will appear in the list of available devices
in your system settings. When playing back audio from your computer, the AUDIO PROGRAM level
control will set how much of the USB audio will feed the outputs of the Presenter. Test USB playback
with the AUDIO PROGRAM turned down, then slowly turn it up until you reach an appropriate volume
through the PA. Also ensure that you don’t have a 3.5mm cable connected to the front input on the
Presenter, as this will override the USB input and effectively mute the output from your computer.

Note: The Presenter’s USB input is only designed to be used with laptop computers. To connect
any mobile or iOS device to the Presenter such as a smartphone or tablet, use the 3.5mm input
provided on the front of the unit.

Using the Presenter as a recording interface

The Presenter can also be used as an analog to digital recording interface when using the USB con­nection into a laptop computer. This allows you to record the microphone input for podcasts or to save
the audio of a lecture to distribute to students afterward.

When using the Presenter to record a lecture or presentation, make sure to rst set the microphone

level to ensure that you’re feeding an appropriate signal level to your recording software. Once this
level is set, adjust the controls on your speakers until you reach the desired level in the room. Lastly,
begin playback on your program material and slowly bring up that level to suit.

Radial Engineering Ltd. Presenter™ User Guide

9

SPECIFICATIONS*

Audio Circuit Type: ....................Active preamplier circuit with digital to analog input conversion

Frequency Response: ........................................................................................... 20Hz to 20kHz

Noise Floor: ........................................................................................................................ -84dBu

Dynamic Range: ............................................................................................................... +91dBu

Maximum Input: ................................................................................................................... +7dBu

Gain: .................................................................................................................................. +52dBu

Intermodulation Distortion:.........................0.003% @ 0dBu, 0.01% @ -10dBu, 0.03% @ -20dBu

Total Harmonic Distortion: ......................... 0.004% @ 20Hz, 0.004% @ 1kHz, 0.004% @ 10kHz

Phase Deviation: ........................................................... -28° @ 20Hz, -1° @ 1kHz, +2° @ 10kHz

Input Impedance: ................................................................................................................... 10kΩ

Output Impedance - XLR Output: ....................................................................................... 2.74kΩ

Insertion Loss: ......................................................................................................................... 0dB

Power: ...............................................................................................................................5V USB

Construction: ........................................................................16-gauge steel chassis & outer shell

Warranty: ..............................................................................................Radial 3-year, transferable

* Subject to change without notice.

Radial Engineering Ltd. Presenter™ User Guide

10

BLOCK DIAGRAM*

+48V

+48V PHA NTOM PO WER SWI TCH

FE MALE MIC inpu t

Fem ale

MIC PRE AMP

HIG H PASS FILTE R

GN D LIF T

BA XAN DALL F ILTER

LEF T

MA IN O UT

RIG HT

INP UT

ME RGE and

UN BAL TO B AL

ME RGE and

UN BAL TO B AL

US B BO ARD RAD 2496

OU TPUT

3.5 mm Inpu t Jac k

3.5 MM JAC K TA KES PRIO RITY

+5V

MO NO SWIT CH

* Subject to change without notice.

Radial Engineering Ltd. Presenter™ User Guide

11

NOTES

Radial Engineering Ltd. Presenter™ User Guide

12

NOTES

Radial Engineering Ltd. Presenter™ User Guide

13

RADIAL ENGINEERING

3 YEAR TRANSFERABLE WARRANTY

RADIAL ENGINEERING LTD. (“Radial”) warrants this product to be free from defects in material and workmanship and
will remedy any such defects free of charge according to the terms of this warranty. Radial will repair or replace (at its

option) any defective component(s) of this product (excluding nish and wear and tear on components under normal use)

for a period of three (3) years from the original date of purchase. In the event that a particular product is no longer avail­able, Radial reserves the right to replace the product with a similar product of equal or greater value. In the unlikely event
that a defect is uncovered, please call 604-942-1001 or email [e-mail] to obtain an RA number (Return
Authorization number) before the 3 year warranty period expires. The product must be returned prepaid in the original
shipping container (or equivalent) to Radial or to an authorized Radial repair center and you must assume the risk of loss
or damage. A copy of the original invoice showing date of purchase and the dealer name must accompany any request for
work to be performed under this limited and transferable warranty. This warranty shall not apply if the product has been

damaged due to abuse, misuse, misapplication, accident or as a result of service or modication by any other than an

authorized Radial repair center.

THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF AND DESCRIBED
ABOVE. NO WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE
RESPECTIVE WARRANTY PERIOD DESCRIBED ABOVE OF THREE YEARS. RADIAL SHALL NOT BE RESPONSIBLE
OR LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSS ARISING FROM THE USE
OF THIS PRODUCT. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER
RIGHTS, WHICH MAY VARY DEPENDING ON WHERE YOU LIVE AND WHERE THE PRODUCT WAS PURCHASED.

Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5

Tel: [phone] • Fax: [phone] • Email: [e-mail]

Presenter™ User Guide - Part #: R870 1039 00 / 01-2018 Copyright © 2018, all rights reserved.

Appearance and specications subject to change without notice.