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XENYX QX2442USB/QX2222USB/QX1832USB/QX1622USB User Manual

1.  Introduction

XENYX Mic Preamp

The microphone channels feature high-end XENYX Mic Preamps that compare 

well with costly outboard preamps in terms of sound quality and dynamics and 

boast the following features:

◊ 

130 dB dynamic range for an incredible amount of headroom

◊ 

A bandwidth ranging from below 10 Hz to over 200 kHz for crystal-clear 
reproduction of even the finest nuances

◊ 

The extremely low-noise and distortion-free circuitry guarantees 
absolutely natural and transparent signal reproduction

◊ 

They are perfectly matched to every conceivable microphone with up 
to 60 dB gain and +48 volt phantom power supply

◊ 

They enable you to use the greatly extended dynamic range of your 
24-bit/192-kHz HD recorder to the full, thereby maintaining optimal 
audio quality

“British EQ”

The equalizers used for the XENYX Series are based on the legendary circuitry of 

top-notch consoles made in Britain, which are renowned throughout the world 

for their incredibly warm and musical sound character. Even with extreme gain 

settings these equalizers ensure outstanding audio properties.

KLARK TEKNIK Effects Processor

Additionally, your XENYX mixing console has an effects processor 

designed by KLARK TEKNIK that has 24-bit A/D and D/A converters 

included, which gives you 32 presets producing first-class reverb, 

delay and modulation effects plus numerous multi-effects in 

excellent audio quality.

The XENYX mixing consoles are equipped with a state-of-the-art 

switched-mode power supply (SMPS). Unlike conventional circuitry an 

SMPS provides an optimum supply current regardless of the input 

voltage. And thanks to its considerably higher efficiency a switched-mode power 

supply uses less energy than conventional power supplies.

FBQ Feedback Detection System

The FBQ Feedback Detection System integrated into the graphic EQ 

of your QX1832USB is one of this mixer’s most outstanding features.
This ingenious circuitry lets you immediately recognize and 

eliminate feedback frequencies. The FBQ Feedback Detection System uses the 

LEDs in the frequency band faders of the graphic EQ to indicate the critical 

frequencies. This way, what once used to be a labor-intensive search for feedback 

frequencies is now an activity that even a child could master.

Voice Canceller

We have added another useful feature to the XENYX QX1832USB: 

the Voice Canceller.
The Voice Canceller is a filter circuitry that filters out vocal portions 

from a track. Therefore, this mixing console is ideally suited for use as a 

karaoke machine. This feature is also an optimal solution for singers who need 

accompanying music for their rehearsals.

!

!

CAUTION!

◊ 

We should like to draw your attention to the fact that extreme volumes 
may damage your hearing and/or your headphones or loudspeakers. 
Turn the MAIN MIX faders and phones control in the main section 
fully down before you switch on the unit. Always be careful to set the 
appropriate volume.

1.1  General mixing console functions

A mixing console fulfils three main functions:

• 

Signal processing: 
Preamplification

Microphones convert sound waves into voltage that has to be amplified 

several-fold; then, this voltage is turned into sound that is reproduced 

in a loudspeaker. Because micro phone capsules are very delicate in their 

construction, output voltage is very low and therefore susceptible to 

interference. Therefore, mic signal voltage is amplified directly at the mixer 

input to a higher signal level that is less prone to interference. This higher, 

interference-safe signal level has to be achieved through amplification 

using an amplifier of the highest quality in order to amplify the signal and 

add as little noise to it as possible. The XENYX Mic Preamp performs this 

role beautifully, leaving no traces of noise or sound coloration. Interference 

that could take place at the preamplification level could affect signal quality 

and purity, and would then be passed on to all other devices, resulting in 

inaccurate sounding program during recording or playback.

Level-setting

Signals fed into the mixer using a DI-box (Direct Injection) or the output of a 

sound card or a keyboard, often have to be adjusted to the operating level of 

your mixing console.

Frequency response correction

Using the equalizers found in each channel strip, you can simply, quickly and 

effectively adjust the way a signal sounds.

Effects mixing

In addition to the effects processor contained in your mixer, using the 

insert connectors on the mono channels and both aux busses lets you insert 

additional signal processors into your signal path.

• 

Signal distribution: 

Individual signals adjusted at each channel strip are laid out at the aux 

sends and returns, and are either fed into external effects processors or fed 

back to the internal effects processor. Then, the signals are brought back 

into the main mix either via the aux return connectors or via direct internal 

wiring. The mix for the on-stage musicians is also created using the aux 

sends (monitor mix). Similarly, for example, signals for recording equipment, 

power ampli fiers, headphones and 2-track outputs can also be taken.