nabeshima
Established Member
Hello everybody,
last week I spent some time with a friend doing some acoustic measurement on my hifi set up to have fun but also check what to improve on the current system.
I had no idea about how the process works till we started but now I am so much into it that I am thinking of buying all I need to run the measurements myself!!
The tools used for the measurement (gently provided by my audiophile friend) were REW software and miniDSP UMIK-1
I will upload the results of the measurement in next couple of days as soon as my friend shares it with me but I wanted to start the thread to seek for some help / suggestion on the type of analysis that should be done on a system.
System
Integrated Amp Yamaha R-N602
Speaker set 1 Q Acoustics 3050i
Speaker set 2 Wharfedale Diamond 9.1
TT Dual 505-2
Measurement Approach
Result
From the profile of the measurement we saw a strange pattern no matter of the different tests we run
I was surprised by the similarity of the profiles measured and I started feeling the Amp has its "signature" amplification and that looked not normal: (a) spike on low frequencies followed by a (b) drop around 100Hz and then a (c) stable output thought the speakers' range. What I will try to answer is
Recommendation received
My friend has recommended a few things to improve the overall the sound:
Room
last week I spent some time with a friend doing some acoustic measurement on my hifi set up to have fun but also check what to improve on the current system.
I had no idea about how the process works till we started but now I am so much into it that I am thinking of buying all I need to run the measurements myself!!
The tools used for the measurement (gently provided by my audiophile friend) were REW software and miniDSP UMIK-1
I will upload the results of the measurement in next couple of days as soon as my friend shares it with me but I wanted to start the thread to seek for some help / suggestion on the type of analysis that should be done on a system.
System
Integrated Amp Yamaha R-N602
Speaker set 1 Q Acoustics 3050i
Speaker set 2 Wharfedale Diamond 9.1
TT Dual 505-2
Measurement Approach
- Measurements were made activating and deactivating the Pure Direct function of the Yamaha amp - Pure Direct Means Pure Fidelity
- We alternated the speakers set and we combined both set - Yamaha currently support combined speakers
- With Pure Direct deactivated we tuned Bass and Treble to try flatten the curve
Result
From the profile of the measurement we saw a strange pattern no matter of the different tests we run
- a flat-ish response on frequencies between 200-20k Hz
- drop after around 20k Hz (depending on the speakers)
- A very weird response within 40-200 Hz with
- Spike in the low range 40-100 Hz
- drop around 100Hz
I was surprised by the similarity of the profiles measured and I started feeling the Amp has its "signature" amplification and that looked not normal: (a) spike on low frequencies followed by a (b) drop around 100Hz and then a (c) stable output thought the speakers' range. What I will try to answer is
- Is the profile seen normal for the Yamaha R-N602 ?
- Is there something in the room set up (carpet, furnitures...) that can have such a destabilising impact on the response?
- Can i measure the output of the AMP without the speakers?
- How are the speakers performing in the same room with a different amp?
- How is the Yamaha R-N602 performing in the same room with different speakers
Recommendation received
My friend has recommended a few things to improve the overall the sound:
- Add a crossover and a subwoofer to separate the 40-200 Hz frequency
- Consider the option of adding a super tweeter to extend the high frequency range
Room
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