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To optimize the subwoofer’s performance you will need some basic 

measurement equipment and software. listed below are relatively 

easy and inexpensive options: 

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Software:

REW -  

http://www.roomeqwizard.com/

 - Free 

or 

Omni Mic - 

http://www.daytonaudio.com/index.php/omnimic-v2-precision-

measurement-system.html

Includes Microphone and uses CD as signal source, minimal physical 
connection required.  

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Measurement Microphone: 

UMIK-1 - 

http://www.minidsp.com/products/acoustic-measurement/

umik-1

 

or 

UMM-6 - 

http://www.daytonaudio.com/index.php/test-measurement/

umm-6-usb-measurement-microphone.html

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for this guide we will use REW measurement software, but any modern 
software should work fine. Since we are measuring bass frequencies 
there is no need for high end microphones or hardware to enable the 
measurement of high frequencies or distortion. 

!

General information  

The Magico QSub is designed to add Ultra low frequencies and 
improve overall bass behavior in a high end stereo system. The 
common cutoff frequency will be 50 Hz and optimal integration will 
be achieved when used with Magico S or Q Series loudspeakers, which 
employ a sealed box design.

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We will rely solely on measurements of the bass frequency response. 
(Our ears are not sensitive enough to determine the source or the 
magnitude of problems in the bass region, yet they easily notice if 
there are problems in that region). place the measurement microphone 
in the listening position. (for a wider listening area one must take 
multiple measurements from a variety of locations and average the 
response, this is beyond the scope of this guide)  

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Summary of Contents for Q-Sub

Page 1: ...m and also to describe the various aspects of crossover and equalization optimization using our highly adjustable Digital Signal Processing software For those with home theater applications please con...

Page 2: ...frequencies there is no need for high end microphones or hardware to enable the measurement of high frequencies or distortion General information The Magico QSub is designed to add Ultra low frequenc...

Page 3: ...frequency response possible Adjust distance from the rear and side walls by increments of 6 at a time to remove as many frequency response dips as possible Once you are satisfied with the position of...

Page 4: ...ured via ethernet connection to a network later on in this manual 5 Position your QSub s We will start by measuring the QSub bass frequency response We will try to optimize the QSub location so we wil...

Page 5: ...ere you can see for a single subwoofer the Left position rear corner positioning is the best It is much smoother from 50 100 Hz Here is the same Measurement with the window expanded to 50 200Hz of 5 2...

Page 6: ...ips You can see that where both speakers have the same level and are both flat they gain a 6 dB increase in level combined When one of them has a dip the speaker with the dip simply fails to contribut...

Page 7: ...emove the casters and apply the feet apply the brakes on both casters which have them While two people lift up the side of the speaker without the brakes a third person unscrew the casters and replace...

Page 8: ...shot below The level of the sub should be between the mains levels up to 6 dB more See the graph below This is subject to the room structure and low frequencies behavior generally speaking wood houses...

Page 9: ...overall bass response This way the mains and a single QSub load the room from three positions In the example in Figure 6 below the best location for the sub red line has a dip at 70 Hz The mains black...

Page 10: ...m modes 2 Use eq filters to shape the response into a desirable in room response Step 1 Since REW has a very useful EQ tool to calculate filter settings we will use it to demo how to achieve our targe...

Page 11: ...the EQ window and select EQ filters 8 Choose a peak to target and then set the frequency attenuation and filter width Q until it is removed Step 2 Targets in the bass region have a wide area of flavo...

Page 12: ...In Room common target limits of 12 21...

Page 13: ...accepts input voltages of up to 23dBu thus matching any source on the market today with an excellent dynamic range of 110dB Features 110dB dynamic range inputs Electronically balanced inputs Matched...

Page 14: ...og inputs The analog input section of the DSP offers two electronically balanced XLR connectors The input level is 23dBu max electronically balanced II Getting Started Quick Start For those of you tha...

Page 15: ...work address indicated by the text This connection has limited or no connectivity The computer and the DSP both will assign themselves a network address in the ZeroConfig range 169 254 0 0 169 254 255...

Page 16: ...rs There may also be limiters set up to keep your amplifiers from going into clipping and protect your speakers from the hazards of a clipped signal Your amplifiers play a vital role in system setup b...

Page 17: ...ss Filter High Pass Filter You can choose from Butterworth 6dB Bessel 6dB Butterworth 12dB Bessel 12dB Linkwitz Riley12dB Butterworth 18dB Bessel 18dB Butterworth 24dB and Bessel 24dB You also have op...

Page 18: ...y12dB Butterworth 18dB Bessel 18dB Butterworth 24dB and Bessel 24dB Parametric Equalizer PEQ There are ten bands of parametric equalization Each band can be adjusted freely over the complete frequency...

Page 19: ...ue RMS compressor The available parameters are Threshold Attack Hold Release Ratio and Makeup Gain To access click on the grey colored Virtual button labeled Compressor Limiter The limiter is a zero a...

Page 20: ...his action cannot be undone but you can edit and store over your preset if you need to make changes Now your preset is saved in the selected location The presets contain all filter dynamics gain setti...

Page 21: ...sword ATTENTION Make sure to remember the password When the unit is locked and you forgot the password it is not possible to unlock it without contacting your local service representative The default...

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