Whirlwind Music Mixer MIX 5 User Manual

whirlwind / U.S. Audio  
Operations Manual  
MIX-5/MIX-5s  
UNPACKING  
INTRODUCTION  
US Audio has made every effort to ensure that your  
equipment is received in the same perfect condition it  
was in when it left the factory. Please inspect your  
product for any signs of damage during shipping and  
report them to your dealer so that he can present a  
claim to the shipper. We recommend that you save  
your packaging material for use in the unlikely event  
that you will need to return your equipment for  
service.  
Thank you for selecting the US Audio Mix 5. Both  
the Mix 5 Stereo and the Mix 5 Mono offer excellent  
value, delivering the highest quality audio  
performance at a low cost. Either unit provides up to  
55dB of gain, with signal to noise ratios that  
approach digital quality and still have 10 to 15dB of  
headroom. With a full complement of hook-up  
hardware, both mixers are capable of handling any  
configuration of line or mic level signals as well as  
any combination of balanced or unbalanced XLR and  
1/4” connectors.  
 
CONTROLS AND CONNECTIONS  
1. Channel Volumes control input signals over a range of  
60dBm attenuation at full off to 20dBmof gain at full on.  
common, wired to sleeve. Audio ground is not connected to  
chassis ground.  
2. Pan Pots (Mix 5 Stereo only) are dual pots with center  
detent, providing over 65dB of stereo isolation from left to  
right channel. The center detent allows convenient and  
accurate setup, feedingsignal equallyto both channels.  
9. Input Mic/Line Switch is engages an active circuit that  
applies 20dB of gain when in the Mic position. This gain is  
applied to both input jacks. For most input signals the Out  
or Line position will be appropriate.  
3. Aux Input Pot controls the rear panel RCA input jacks.  
Input signals are actively summed in the Mix 5 Mono, and  
maintain stereo separation in the Mix 5 Stereo. Again, with  
a range of -60 to +20dB of gain, the Mix 5 Aux input will  
interface easily with most types of gear.  
10. Output Male XLR Jack (left for stereo) is balanced  
with pin 2 positive, pin 3 negative and pin 1 audio ground.  
For unbalanced operation use pins 1 and 2 leaving pin 3  
UNCONNECTED. To internally lift pin 1 from common,  
open the unit and cutjumper JMP84.  
4. Master Volume Pots (one for Mix 5 Mono) determine  
the amount of signal from the summing amps that is fed to  
the output drivers and the meters. These also have a gain  
range of -60 to +20dBm.  
11. Output Mic/Line Switches affect only the XLRoutput  
jack(s) by inserting a 20dB pad across pins 2 and 3 when in  
the Mic position.  
12. Output 1/4” TRS Jack delivers the same signal as the  
XLR but has a separate driver circuit providing complete  
isolation from the XLR output. May be used either  
balanced with a TRS plug or unbalanced with a TS plug.  
Tip is positive, ring is negative and sleeve is audio ground.  
This jack can drive high impedance headphones directly,  
although one side is out of phase. A properly wired adapter  
cable can provide monitoring capabilities.  
5. LED dB Indicators are precisely calibrated in 3dB  
increments and span a range of -15 to + l2dBm, measured  
unbalanced with the input switch in Line mode, at either  
the 1/4” output or the XLR output. (Add 6 dB for balanced  
output).  
6. Phantom Power for each of the four input XLR jacks  
is activated by the rear panel pushbutton switch. Status is  
indicated by the front panel LED. Each channel is  
individually filtered to eliminate crosstalk through the  
supply rail. The Mix 5 supplies l8VDC with current  
limiting resistors chosen to ensure that the phantom supply  
will not fall below the AES minimum specification of  
l2VDC at a 5.2mA current draw. Most condenser type  
microphones draw between 1 and 3mA and will operate  
from 12 to 48VDC.  
13. Output 1/4” TRS Jack is connected to the right output  
and is identical to #12 above for the Mix 5 Stereo. It  
provides a second active isolated TRS output in the Mix 5  
Mono.  
14. Output Male XLR Jack and Mic/Line Switch appear  
only on the Mix 5 Stereo and operate identically to #10 and  
#11 above, providing theright channel output. To internally  
lift pin 1 from common, open the unit and cut jumper  
JMP85.  
7. Power Switch connects AC to the transformer primary  
and the LED indicates that the unit is receiving power.  
Both sides of the AC line are switched and a mains fuse is  
located on the circuit board insidethe unit.  
15. Power Cord has a standard 15 amp plug for l20VAC  
and has no plug on the Mix 5MX or Mix 5sX 230VAC  
export models. Black is line, white is neutral and green is  
earth.  
8. Input 1/4” TRS and XLR Jacks are AC-coupled  
through phantom blocking capacitors with pin 2 positive,  
wired to tip, pin 3 negative, wired to ring, and pin 1  
 
SPECIFICATIONS  
Frequency Response  
Line mode  
± 3dB, 6Hz to 36kHz  
-0.4dB @ 20Hz  
-1dB @ 20kHz  
Mic mode  
± 3dB, 18Hz to 36kHz  
-2.5dB @ 20Hz  
-1dB @20kHz  
Maximum Input Level  
Line mode  
+22 dBm unbalanced  
+28 dBm balanced  
Mic mode  
- 2 dBm unbalanced  
+4 dBm balanced  
Input Impedance  
Line mode  
Mic mode  
2k Ohm balanced or unbalanced  
600 Ohm balanced  
2k Ohm unbalanced  
Maximum Output Level  
Balanced  
+28dBm  
+22dBm  
Unbalanced  
Output Impedance XLRs  
Line mode  
100 Ohms  
200 Ohms  
Mic mode  
Output Impedance TRS  
Unbalanced  
60 Ohms  
Balanced  
120 Ohms  
Rise Time  
8uSec  
Stereo Separation  
>65dBm  
C.M.R. (Common Mode Rejection) of Input  
> 55dBm @ 60Hz  
Attenuation Of Llne/Mic Output Switch  
20dBm  
Isolation Between 1/4” and XLROutputs  
>l00dBm  
Aux Input Impedance  
10k Ohms  
+22dBm  
Maximum Level Aux Input  
THD+N (Total Harmonic Distortion + Noise)  
Line Mode @ l4dBm of Gain .005%  
Line Mode @ Unity Gain  
.012%  
 
Equivalent Input Noise  
Headroom  
(dBm)  
Input Level  
(dBm)  
Input Mic/Line  
Gain  
S/N Ratio  
(dBm)  
E.I.N.  
Switch Position  
(dBm)  
(dBm)  
+ 10  
0
Line  
Line  
Line  
Line  
Mic  
0
13.8  
13.4  
12.3  
12.2  
28  
88.3  
87  
-88.3  
-87  
0
0
10  
10  
30  
40  
50  
14  
14  
85  
-75.3  
-69.2  
-76  
-10  
-20  
-30  
-40  
-10  
-10  
79.2  
86  
Mic  
12.5  
12.7  
18.4  
7.8  
79.7  
72.3  
75.8  
84  
-69.7  
-62.3  
-71.8  
-80  
Mic  
Line  
Mic  
whirlwind  
99 Ling Road  
Rochester NY 14612  
800 733-9473  
 

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