M Audio Stereo Amplifier Dual Mic Preamp User Manual

A u d io B u d d y  
D u a l M ic P re a m p | D ire c t B o x  
U s e rs M a n u a l  
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In t r o d u c t io n  
This product complies with European CE requirements.  
Thank you for your purchase of the M-Audio AudioBuddy, mic  
preamp and direct box. M-Audio has designed and manufactured  
several different audio mixers including MiniMixer, MicroMixer 18,  
MultiMixer 6, MultiMixer 10 and miXim 10. All of these mixers have  
two things in common: 1.) they are exceedingly quiet -- quieter than  
99% of all mixers on the market and 2.) they are uniquely configured to  
meet the specific needs of the MIDI and multimedia musician.  
The Audio Buddy, once again, fits these two criteria. First, it is a very  
quiet mic preamp. This is because the unit’s simple and efficient  
design and ultra compact layout eliminates much of the noise. The  
unit also has a higher than usual voltage rail” across its internal op-  
amps. This means that you get more punch” and much more dynamic  
audio output.  
S econdly, the Audio Buddy (when coupled with its ultra quiet  
performance) is the perfect audio “gateway” for recording the two  
most significant, non-line level instruments in the studio: microphones  
and electric guitars.  
The Audio Buddy has two completely independent preamplifier  
sections. Each of these sections has: 1.) a balanced XLR input on the  
back of the unit, 2.) a high impedance 1/4” unbalanced input (TS) on  
the front of the unit, 3.) signal (present) and clipping LEDs, 4.) a gain  
control and 5.) a 1/4” dual purpose output on the back of the unit that  
provides either an unbalanced out (when a mono plug is used) or a  
balanced out (when a stereo plug is used).  
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IMP ORTANT: Whenever one of the front panel high impedance  
inputs is used, the associated back panel XLR is disabled.  
The Audio Buddy also has built in phantom power which can be  
switched on or off for both channels. When the rear panel phantom  
power switch is in, phantom power to both channels is turned on and  
the front Phan(tom) power LED will light.  
IMP ORTANT: Since the phantom power switch turns phantom  
power on or off for both channels, there is no way to turn phantom  
power on for one channel and off for the other channel. If you are  
using the high impedance inputs the phantom power switch has no  
effect.  
F ro n t a n d R e a l P a n e ls  
When reading the following description of front and rear panel harware  
features, it may be helpful to refer to the adjacent diagram.  
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F ro n t  
1. High Impe da nce Input 1: High impedance (100K) input for  
Preamp 1. This input is optimized for guitars or high impedance  
microphones where you dont want to load down the source.  
When this input is being used XLR input 1 is disabled.  
IMP ORTANT: Because the high impedance input jack is  
switched, the XLR input cannot be used whenever something is  
plugged into the high impedance input.  
2. Sig(nal) and Clip LED Preamp 1: Whenever a signal is applied to  
either the high impedance ”In” or the XLR “In” of Preamp 1, these  
LEDs will show signal present and clipping levels. If a signal is  
applied in this manner and the clipping LED lights too much adjust  
the Preamp 1 gain control accordingly.  
3. Gain Control for Preamp 1: Adjusts the Output 1 volume level  
for Preamp 1. If a signal is present at either the high impedance in  
or the XLR in of Preamp 1 and the Clipping LED stays lit, turn  
down this gain control and adjust accordingly.  
4, 5, 6. Same as 1, 2 and 3 for Preamp 2. Remember, Preamp 1  
and Preamp 2 are completely independent.  
7. P ha nto m Po we r Indica to r LED: When the phantom power  
switch on the back of the unit is in, this LED will light indicating that  
phantom power has been turned on for both XLR in 1 and XLR 2.  
IMP ORTANT: Phantom power is turned on for both preamps,  
i.e. there is no independent phantom power control for each of  
the channels.  
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8. Main Power Indicator LED: When power is properly applied  
to the Audio Buddy and when the front power switch is in, the  
main power LED will light indicating that the unit is turned on.  
9. Power Switch: When power is properly applied to the Audio  
Buddy and this switch is pressed in, the Audio Buddy is turned  
on. When this is done the Main Power LED will light.  
R e a r  
10. 9-VAC Power Jack. The rear panel power jack of the Audio  
Buddy accepts a 9-Volt AC, 500 milliamp power adapter.  
IMPORTANT: Audio Buddy will not function unless it receives  
power at this jack and the front panel power switch is  
pushed in.  
11, 12. Outputs 2 and 1: These are the main outputs for the dual  
Audio Buddy preamps. They provide unbalanced outputs if a  
tip-sleeve 1/4” plug is used. Or, they provide balanced outputs  
if a tip-ring-sleeve (stereo) 1/4” plug is used. The level of these  
outputs are independently controlled by the front panel gain  
controls. Remember, Preamp 1 and Preamp 2 are completely  
independent.  
13. Phantom Power Switch: When in, phantom power is turned  
on for b o th XLR In 1 and In 2. When in, the front panel  
phantom power indicator LED will light showing that phantom  
power is on.  
14, 15. XLR-In 1&2: (# 15 is 1; # 14 is 2) Balanced XLR inputs for  
preamps 1 and 2. When the rear phantom power switch is in,  
phantom power is turned on to both jacks.  
IMP ORTANT: If anything is plugged into either of the front-  
panel high-impedance input jacks, the corresponding XLR  
input will be disabled.  
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F e a tu re s  
The Audio Buddy features include:  
• 2 independent XLR, fully balanced inputs.  
• 2 alternate, independent 1/4” unbalanced, high impedance inputs.  
These alternate 1/4” inputs are impedance matched for ideal  
performance with typical electric guitars.  
Separate gain controls for each of the two preamplifiers.  
Individual signal and clipping LEDs for each of the preamplifiers.  
• XLR phantom power can be switched on and off for both of the  
mic preamps.  
• Phantom power on or off LED indicator.  
• Dual purpose independent 1/4” outputs which accept either  
tip-ring-sleeve plugs for balanced signal or tip-sleeve plug for  
unbalanced signal.  
Super-small size: 5.5" x 3.3" x 1.7".  
Very-quiet S/N specification.  
• Heavy-duty all metal construction.  
Sp e c if ic a t io n s  
• Frequency Response: 5 Hz to 50 kHz, +0, -3 dB.  
• Mic Gain: 60 dB max.  
• Mic Input Impedance: 1 K ohm.  
• Guitar Gain: 40 dB max.  
• Guitar Input Impedance: 100 K ohms.  
• Approximate weight: under 1/2 lb.  
• Power supply: 9 VAC; 500 milliamps.  
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Wa rra n ty a n d R e g is tra tio n  
Wa rra n ty Te rm s  
M-Audio warrants products to be free from defects in materials and  
workmanship, under normal use and provided that the product is owned  
by the original, registered user. Visit www.m-audio.com/warranty for  
terms and limitations applying to your specific product.  
Wa rra n ty R e g is tra tio n  
Immediately registering your new M-Audio product entitles you to  
full warranty coverage and helps M-Audio develop and manufacture  
the finest quality products available. Register online at www.m-  
audio.com/register to receive FREE product updates and for the  
chance to win M-Audio giveaways.  
© 2008 Avid Technology, Inc. All rights reserved. Product features,  
specifications, system requirements and availability are subject to  
change without notice. Avid, M-Audio and Audio Buddy are either  
trademarks or registered trademarks of Avid Technology, Inc. All  
other trademarks contained herein are the property of their  
respective owners.  
WARNING: This product contains chemicals, including lead,  
known to the State of California to cause cancer, and birth defects  
or other reproductive harm. Wa s h ha nds a fte r ha ndling.  
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080519_AudioBuddy_UG_EN01  
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