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Introduction
Introduction
Measurements taken 2018-08-18
One of the often discussed audio related topics in the selection of 'Large' or 'Small' for your front speakers and the crossover frequency you must select in case you set speakers at 'small'. In order to bring some light to this topic I made some measurements comparing the different crossover frequency my Pioneer AV-receiver offers.
Equipment & Room info
Equipment & Room info
See Game room.
The front speakers are Monitor Audio Bronze 2 (MAB2).
Measurement Graphs
Measurement Graphs
The subwoofer was switched off in order to have a look at what the front speakers produce. The front left speaker is visualised in the graph below, but the front right speaker shows comparable results.
Red graph: the front speakers set to 'Large' on the receiver. The crossover frequency is not applied to the fronts (only surrounds).
Purple graph: the front speakers set to 'Small' on the receiver, with the crossover set to 50Hz.
Blue graph: the front speakers set to 'Small' on the receiver, with the crossover set to 80Hz.
Green graph: the front speakers set to 'Small' on the receiver, with the crossover set to 100Hz.
Yellow graph: the front speakers set to 'Small' on the receiver, with the crossover set to 150Hz.
My Conclusions
My Conclusions
For these conclusions I do not reference the frequencies below 25Hz as I do not expect they will be reproduced correct.
- All graphs show comparable shapes. Therefor the room modes have way more influence on the frequency reproduction than the crossover frequency. (I really should try to solve the huge dip between 50Hz and 100Hz.)
- The room mode has most effect on the 'Large' graph and the peak at 42Hz gets smaller when increasing the crossover frequency.
- All but the 150Hz setting are rather identical above 100Hz. Above 170Hz all are identical.
- The red line (speakers set to large) has the highest dips and peaks, which is considered worst. Therefore I would not recommend this setting. (Still, the most important reason to select 'small' is to use the sub for low frequencies, but that is another article.)
- The 50Hz, 80Hz and 100Hz settings do not really make a big difference. I expected it would define where the line would split from the red (set as Large) line, but measurements show that it has more effect on the graph slope.
Based on these measurements I decided that 'small' with the crossover at 100Hz is the best option for my setup.
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