*Illustrations may differ from actual production models
Key To Illustration:
1. Voice Input 1 Volume
2. Voice Input 2 Volume
3. Voice lnput Tone Controls
4. Alternate Input 1
5. Music Input 1 Volume
6. Music Input 2 Volume
7. Music Tone Controls
8. Power On/Off
9. 15V Line Output
10. 1Volt Line Output
11 Master Volume
12. Music Mute/SoundEar-Relay Inputs
13. Mute Recovery Time Control
14. Music Inputs
15. Mic Level Inputs
16. SoundEar-Switch
The Fitness Audio 2+2DC Hook-up Guide
Thank you for purchasing the Aeromix 2+2DC Voice-over-Music Mixer by Fitness Audio – designed
to make fitness instructors’ lives easier. If your sound contractor is not installing your Aeromix for you,
please follow these simple steps to connect it to your Group Fitness stereo sound system.
1. Connecting the Wireless Mic Receiver.
Connect the Line Out jack socket of your wireless microphone receiver to the
Mic 1(15)
socket on the
back of the Aeromix using a standard mono 6.35mm (quarter inch) jack to jack lead which is usually
supplied with wireless receivers.
1.1 Balanced Line Connection
These mic sockets will also accept a TRS (stereo) jack with a balanced line cable from an XLR
Mic Level output socket found on the majority of quality wireless receivers. Balanced line
connections will always sound better, revealing more “body” in the voice, and are less susceptible to
noise and interference.
1.2 Connecting a second Wireless Mic Receiver
If a second wireless receiver has to be connected then repeat the connection procedure as before using
the
Mic 2(15)
input socket.
2. Connecting the Music Sources - The Main CD Player
Connect the Line Out or Play sockets of your CD Player to the
Music 1(14)
input sockets on the
Aeromix using a 2 RCA to 2 RCA lead. Remember that “Red is Right and Left is White” (or Black!).
2.1 Connecting a second Player or Radio Tuner
Connect the Line Out or Play sockets from your second player to the
Music 2(14)
input sockets of the
Aeromix using a 2 RCA to 2 RCA lead.
2.2 Connecting an MP3 Player.
Using the supplied
iJax
6.35mm stereo jack to 3.5mm stereo mini-jack lead, connect the Line Out or
Play sockets of your Personal MP3 or MD Player to the 6.35mm
Alt 1 In(4)
jack socket on the front panel
of the Aeromix. When this lead is plugged in the
Music 1 Volume(5)
is diverted from any player plugged
into the rear panel
Music 1(14)
RCA input sockets until the jack plug is removed. Use a combination of
your player’s output level control, if it has one, and the
Music 2 Volume(6)
control to achieve a strong,
clean, undistorted sound.
3. Connecting to the Power Amplifier
Connect a dual 6.35mm jack lead (balanced or unbalanced) from the
1V Output(10)
pair of
sockets to your amplifier’s input sockets. If the power amplifier is a USA made brand it may require
more driving voltage – if this is so then connect it to the
1.5V High Output(9)
sockets. Most power
amplifiers made in Asia and Australia are best suited to the standard 1V sockets. A pair of 1m TRS Jack
to XLR-M colour coded cables are supplied in some areas for this purpose. Red is Right and Black is Left.
3.1 Connecting to a second device
The unused pair of outputs can be used for driving another amplifier in either stereo or mono; or they
could be used to connect to a wireless transmitter or a recording system, providing they have input or
record level controls and you don’t use exaggerated treble & bass tone settings.
4. Plug it in!
With the speakers connected to the power amplifier, connect the Aeromix 24VDC Power Pack to your
power point, turn it on and make sure the full system is fully powered up. The latest version (2012/09)
features a cable restraint post to secure the DC plug from being accidentally removed so secure the
cable around the restraining post.
5. Setting the volume levels.
Start from the end! Firstly adjust the level controls of your power amplifier – set its volume
controls up to maximum.
5.1 Setting the microphone level.
If you are using an Aeromic™ Headworn Microphone then make sure that the small gain control on
the transmitter is turned all the way down to minimum gain or just on. Now check that the receiver’s
mic/line output selector (if there is one) is set to “mic” if you're using a balanced line cable connection,
or to “line” if you're using an unbalanced cable connection, and turn the volume control of the receiver
to the midway or 12 o’clock position.
Turn the
Voice(1,2)
control on the Aeromix up to the midway or 12 o’clock position. Put the micro-
phone on, turn on the transmitter and start counting out loud while advancing the
Master Volume(11)
control on the back of the Aeromix until feedback (mic howling) starts; then edge it back a touch until
the voice sounds dry with no hint of “ringing” or feedback. Fine tune by walking around the room talk-
ing and seeing how close you can get to the speakers – the better they are the closer you’ll get – with-
out the mic feeding back. This process is called setting the maximum “gain-before-feedback” position.
5.2 It’s a Voice-Over-Music Mixer
Now play some music and adjust the music volume against your mic level while projecting your voice
as you would teaching an Group Fitness or Dance Class. Remember, it’s a Voice
over
Music Sound
System – the audience wants to hear what‘s being said above the level of the music. Note: the latest
version of the 2+2DC (2012/09) features “click off” positions on the two Music Level Controls so that
Background Music that is constantly present on Channel 2 can be completely muted.
6. Setting the Tone Controls.
As a general guide, the voice could do with a touch less bass and a touch more treble but not too much
or it might sound too “edgy” so just add a little treble boost to help the voice cut through the music.
Now for the music – get a test CD and start it playing. Set the volume so it’s not too loud and adjust the
bass and treble controls by sweeping from left to right and back again. Settle on a setting that gives a
more subtle fullness to the music rather than an exaggerated bass and/or treble.
7. Music Mute Relay Circuit
Many responsible Building Approval Authorities around the world are now requesting that there be
supplied a music cut out switch on any powerful music system installed in a public or community
centre (ie city or council owned fitness centres). The circuit is closed by the fire alarm control system
should an alarm be activated anywhere in the building. We believe that this will eventually be a compli-
ance standard for private enterprise owned centres as well.We have opted to supply a music cut out
circuit rather than a total power cut system, as we feel that Instructor should be trained to react to the
alarm and lead their class members out to safety using the vocal power of their mic through the sound
system. This connection should only be installed by a licensed contractor. To use the circuit a two-wire
cable has to be run from the General Services Board connected to the building’s alarm system and the
two wires are connected to the screw terminals. Set the music playing and have someone on the mic
just talking, then check by shorting a test cable screwed into the green Phoenix Connector, pins 1 &
2 and the music should cut out, leaving the mic working so that people can be marshalled out to the
Fire Drill Assembly points.
8. Connecting to a SoundEar®
The SoundEar is a Sound Pressure Level (SPL) Monitoring Display that shows you when a pre-set sound
level has been exceeded by illuminating a Red WARNING sign. The inner ear orange circle lights at 5dB
less than the set level. The SoundEar should be positioned above head height on a side wall, or in a
position that will catch the ambient or reflected sound -ie not directly facing the loudspeakers. The
default setting of the Aeromix 2+2DC’s SoundEar switch is Off or normal hook up to a power amp. If
you are connecting the mixer to a SoundEar product then you have to set this switch to ON. Use a 2
wire speaker cable soldered to a standard mono mini (3.5mm) jack to plug into the socket on the base
of the SoundEar, and run the cable from the SoundEar back to the 2+2DC. Using the detachable half of
the green Phoenix connector, connect Pin 3 to the earth or sleeve of the mini jack and Pin 4 to the tip.
Now when you are connected and playing some music with the SPL setting at 95dB, the Music Mute
Relay will be activated every time the input exceeds the recommended level. Some people may think
this is a good thing while others may find it disruptive but the whole point is to protect both employees
and the paying audience from constant exposure to high noise levels that may be detrimental to their
hearing. If you feel the cut-out is too severe then move the setting on the back of the SoundEar up one
notch to 100dB and mix the voice and music up to the point where the inner orange circle is flashing
in time with the beat and no more-that’s the safe 95dB point and always keep the level below where
the Red Warning sign and the cut-out is activated. The TIMER screw pot adjusts the amount of recovery
time it takes to switch back on -from a couple of seconds to a maximum 30 seconds of music silence.
Please remember you have to turn the Music and Voice control levels down a little bit if you want to
avoid the cut-out occurring again. Keeping your eyes on the SoundEar while setting the levels could
save your ears in the long term.
MASTER
MUSIC INPUT
TIME
MIC 2
MIC 1
VOICE INPUT
L
R
2
OFF ON
1
L
R-MONO
L
R-MONO
OUTPUT
1.0V
1.5V
Alt.1 In
Bass
Treble
1
2
Bass
Treble
1
2
9
7
3
10
11
8
6
5
4
2
1
12
13
14
15
16
