Hi, this is my first post but I have read a lot of info from this forum...
I would like to build a subwoofer, sealed (small box size it's a must).
I want to use it mostly for music but also for movies from time to time (maybe twice/month).
My system is built from:
- PC with an Asus Essence Xonar ST audio card
- Stereo Integrated Amplifier NAD C 326BEE
- One pair of Monitor Audio BX2
The subwoofer will have a plate amplifier. I'm thinking to:
1. Wyntek WAM300-DSP
2. BASH300 (with a power transformer from 220V to 110V)
3. Hypex DS2.0
4. RCM Detonation DT 150
5. Dayton Audio SPA250
The drivers which I considered OK for this system were:
1. Dayton Audio RSS265HF-4
2. SB Acoustics SB29NRX75-6
3. CSS SDX10
4. ScanSpeak 26w/4558T00
5. SEAS L26ROY
6. Peerless XXLS P835016
I'm also open for other proposals in the price range up to 250EURO.
What I expect from the system is good quality (to go as low as possible and precision), not very loud music (because I have neighbors...)
Starting from these inputs I have used WinISD to do some modeling.
Used parameters are:
Qtc=0.707
Ql=15
Qa=20
As filters I used (the frequencies are from Wyntek amplifier, I don't know the type and order from this amplifier so I considered Butterworth Order 2):
- Highpass Butterworth Order 2 with 16 Hz Cutoff
- Lowpass Butterworth Order 2 with 160 Hz Cutoff
As you can see in the attachments the drivers with lowest F3 are:
1. SB Acoustics with 44.28 Hz
2. Dayton with 44.34 Hz
3. SEAS with 46.10 Hz
As Group delay al 6 drivers are very close.
As SPL:
1. SEAS with 109.7 dB
2. CSS with 109.6 dB
3. Dayton with 108.1 dB
At Cone excursion I have used the power which will lead to maximum cone excursion where this power was smaller than rated power (Dayton and SB Acoustics) or the rated power in case that the power needed for Xmax was bigger than rated power. If I use the power for Xmax for some drives I will need more than 400W which is way beyond rated power and my price range and needs
As box dimension what I could maximum afford is 35l net volume.
Now the questions:
1. Which driver should I use?
2. Which plate amplifier should I use?
3. Its OK to use Qtc=0.707 or I should use other value?
4. Its OK how I thought about power input (depending on which one is bigger rated or the one which gives Xmax)?
5. What is the difference between SPL and Maximum SPL in WinISD?
6. The used filters and parameters are OK?
Thanks.
I would like to build a subwoofer, sealed (small box size it's a must).
I want to use it mostly for music but also for movies from time to time (maybe twice/month).
My system is built from:
- PC with an Asus Essence Xonar ST audio card
- Stereo Integrated Amplifier NAD C 326BEE
- One pair of Monitor Audio BX2
The subwoofer will have a plate amplifier. I'm thinking to:
1. Wyntek WAM300-DSP
2. BASH300 (with a power transformer from 220V to 110V)
3. Hypex DS2.0
4. RCM Detonation DT 150
5. Dayton Audio SPA250
The drivers which I considered OK for this system were:
1. Dayton Audio RSS265HF-4
2. SB Acoustics SB29NRX75-6
3. CSS SDX10
4. ScanSpeak 26w/4558T00
5. SEAS L26ROY
6. Peerless XXLS P835016
I'm also open for other proposals in the price range up to 250EURO.
What I expect from the system is good quality (to go as low as possible and precision), not very loud music (because I have neighbors...)
Starting from these inputs I have used WinISD to do some modeling.
Used parameters are:
Qtc=0.707
Ql=15
Qa=20
As filters I used (the frequencies are from Wyntek amplifier, I don't know the type and order from this amplifier so I considered Butterworth Order 2):
- Highpass Butterworth Order 2 with 16 Hz Cutoff
- Lowpass Butterworth Order 2 with 160 Hz Cutoff
As you can see in the attachments the drivers with lowest F3 are:
1. SB Acoustics with 44.28 Hz
2. Dayton with 44.34 Hz
3. SEAS with 46.10 Hz
As Group delay al 6 drivers are very close.
As SPL:
1. SEAS with 109.7 dB
2. CSS with 109.6 dB
3. Dayton with 108.1 dB
At Cone excursion I have used the power which will lead to maximum cone excursion where this power was smaller than rated power (Dayton and SB Acoustics) or the rated power in case that the power needed for Xmax was bigger than rated power. If I use the power for Xmax for some drives I will need more than 400W which is way beyond rated power and my price range and needs
As box dimension what I could maximum afford is 35l net volume.
Now the questions:
1. Which driver should I use?
2. Which plate amplifier should I use?
3. Its OK to use Qtc=0.707 or I should use other value?
4. Its OK how I thought about power input (depending on which one is bigger rated or the one which gives Xmax)?
5. What is the difference between SPL and Maximum SPL in WinISD?
6. The used filters and parameters are OK?
Thanks.