I am sharing with you yet another DIY project we have done with my neighbor (who is a carpenter...
) much earlier this year
It is a FAST (Fullrange Assisted Subwoofer Technology) system consisting of 12" Audio Nirvana Classic fullrange speakers and Dayton Audio RSS315HF-4 subs
I could not find the pictures about the construction but here are the final results in my living room:
Both cabinets are sealed, the fullrange is 70 liters with a Qtc=0.69, the sub box is 27 liters with the same Qtc
The fullrange cabinet is made of 18mm MDF whereas the sub is made of 30mm plywood (they were not made at the same time, hence the difference, I know it is not ideal) - nowadays I stick to plywood and ditched MDF
The interior walls are covered with polyester fiber (https://www.soundimports.eu/en/monacor-mdm-2.html), except for the front wall
All the speakers are driven by Hypex Ncore NC250MP amps and an Okto DAC8 Pro DAC
Now let's see the measurements!
All these were done with REW using UMIK-1 microphone at listening position. Optimizations were done using Dirac Live 3 and Pultec EQ (by Waves).
Crossover is at 80Hz 24dB/octave using Acon Equalize 2 in Mixed Phase mode
The presence or lack of tilt at both end of the spectrum represents my own taste/preference, they can be freely adjusted
Frequency response (1/12) with Excess Phase, dips are room-related
My room dimensions are 720*360*260 cm so very nasty room modes are present unfortunately
As you can see in the pictures the only treatment is the two bass traps in the front corners (HOFA Natural)
Impulse response:
Step Response:
Excess Group Delay:
Waterfall
Wavelet
And for those who like the horror genre, the FR pre vs post correction:
Some subjective comments: this is by far the best system I have ever had in my life (so far). I previously had many 2-way and 3.5-way systems (mainly Nuberts, like the nuBox 513 and then the nuVero 140) but this beats the crap out of those. Dynamics are insane and the "live sound experience" that fullrange systems provide is totally there (I guess that is due to the fact that there is no crossover in the 300-3000Hz region). I can 'see' the musicians in the room.
The biggest 'drawback' is that this is a one-man system, if I move my head just a few centimeters away from the sweet spot the sound is no longer the same - this is due to the extreme beaming of the fullrange drivers - but I really don't mind; I was aware of this before I ventured into the realm of fullrange drivers
The bad news is that the whole system will be decommissioned and replaced by this one: https://www.audiosciencereview.com/...-corner-line-array-project.25983/#post-887939 due to the pressure from a Higher Power (=my wife)
She needs more space in the living room hence I 'decided' to give a chance to Murphy's Corner Line Array
More on that later in the above post in a few months' time
I hope you find this useful, any comments/questions are welcome
) much earlier this yearIt is a FAST (Fullrange Assisted Subwoofer Technology) system consisting of 12" Audio Nirvana Classic fullrange speakers and Dayton Audio RSS315HF-4 subs
I could not find the pictures about the construction but here are the final results in my living room:
Both cabinets are sealed, the fullrange is 70 liters with a Qtc=0.69, the sub box is 27 liters with the same Qtc
The fullrange cabinet is made of 18mm MDF whereas the sub is made of 30mm plywood (they were not made at the same time, hence the difference, I know it is not ideal) - nowadays I stick to plywood and ditched MDF
The interior walls are covered with polyester fiber (https://www.soundimports.eu/en/monacor-mdm-2.html), except for the front wall
All the speakers are driven by Hypex Ncore NC250MP amps and an Okto DAC8 Pro DAC
Now let's see the measurements!
All these were done with REW using UMIK-1 microphone at listening position. Optimizations were done using Dirac Live 3 and Pultec EQ (by Waves).
Crossover is at 80Hz 24dB/octave using Acon Equalize 2 in Mixed Phase mode
The presence or lack of tilt at both end of the spectrum represents my own taste/preference, they can be freely adjusted
Frequency response (1/12) with Excess Phase, dips are room-related
My room dimensions are 720*360*260 cm so very nasty room modes are present unfortunately
As you can see in the pictures the only treatment is the two bass traps in the front corners (HOFA Natural)
Impulse response:
Step Response:
Excess Group Delay:
Waterfall
Wavelet
And for those who like the horror genre, the FR pre vs post correction:
Some subjective comments: this is by far the best system I have ever had in my life (so far). I previously had many 2-way and 3.5-way systems (mainly Nuberts, like the nuBox 513 and then the nuVero 140) but this beats the crap out of those. Dynamics are insane and the "live sound experience" that fullrange systems provide is totally there (I guess that is due to the fact that there is no crossover in the 300-3000Hz region). I can 'see' the musicians in the room.
The biggest 'drawback' is that this is a one-man system, if I move my head just a few centimeters away from the sweet spot the sound is no longer the same - this is due to the extreme beaming of the fullrange drivers - but I really don't mind; I was aware of this before I ventured into the realm of fullrange drivers
The bad news is that the whole system will be decommissioned and replaced by this one: https://www.audiosciencereview.com/...-corner-line-array-project.25983/#post-887939 due to the pressure from a Higher Power (=my wife)
She needs more space in the living room hence I 'decided' to give a chance to Murphy's Corner Line Array
More on that later in the above post in a few months' time
I hope you find this useful, any comments/questions are welcome
