New 4 way active system finished
Here is a 4 way active system I finally finished. The sub contains two peerless sls-8 driver in ported enclosure. Ports are at the back. Filter for the sub kicks in at 100Hz. The upper part is open baffle. For optical reasons the back of the drivers is covered by 10mm basotec in a wooden frame. Frequency range from 80Hz-250Hz is covered by a PHL2460 which is one of the most neutral drivers I ever used. Above 250Hz works a Thiel SCS3 coaxial driver. Tweeter takes over at 2000Hz.
The upper part with the Thiel can be replaced by two other versions. One containing a Manger MSW and a third one with an Eton 5'' and a 25mm Visaton ceramic tweeter. But in fact the Thiel delivers the best trade of between liearity and imaging in my opinion.
Crossover is implemented in a Najda DSP and music is coming from a heavily modified Sony CD player or most of the time streamed from a Raspberry PI 3.
Sub section is powered by two IRS2092 module and the open baffle section by 12 LM3886 (6 modules with 2 LM3886 in parallel each). The Thiel is nominally rated 4 ohms but comes down to 3 ohms partially. Therefor I decided to use LM3886 in parallel. In the future I plan to build 6 CFA amps
for the open baffle section.
Maik
Here is a 4 way active system I finally finished. The sub contains two peerless sls-8 driver in ported enclosure. Ports are at the back. Filter for the sub kicks in at 100Hz. The upper part is open baffle. For optical reasons the back of the drivers is covered by 10mm basotec in a wooden frame. Frequency range from 80Hz-250Hz is covered by a PHL2460 which is one of the most neutral drivers I ever used. Above 250Hz works a Thiel SCS3 coaxial driver. Tweeter takes over at 2000Hz.
The upper part with the Thiel can be replaced by two other versions. One containing a Manger MSW and a third one with an Eton 5'' and a 25mm Visaton ceramic tweeter. But in fact the Thiel delivers the best trade of between liearity and imaging in my opinion.
Crossover is implemented in a Najda DSP and music is coming from a heavily modified Sony CD player or most of the time streamed from a Raspberry PI 3.
Sub section is powered by two IRS2092 module and the open baffle section by 12 LM3886 (6 modules with 2 LM3886 in parallel each). The Thiel is nominally rated 4 ohms but comes down to 3 ohms partially. Therefor I decided to use LM3886 in parallel. In the future I plan to build 6 CFA amps
for the open baffle section.
Maik
Attachments
4-way temporary setup.
Fostex T500A
TAD-2001
TAD-1201
GPA-414
Active digital x-over.
Fostex T500A
TAD-2001
TAD-1201
GPA-414
Active digital x-over.
My GedLee NA12 visited the boutique about a little over 1 year ago. See here for the story:
This GedLee NA12 visited the boutique!
Best,
Anand.
This GedLee NA12 visited the boutique!
Best,
Anand.
Here is my 4-way(3 1/2) garage soundsystem.
There are two JBL 2234 , two 2225, two 2445 and two 2405 Al
Upper woofer start at 60 Hz and all 4 go up to 650 Hz, where the horn comes in.The 2445 gos up to 10000 Hz.
Horn and most of the lower speaker cabinet ist made of stoneplates , concrete and concretefiber. The other used material is mostly multiply with a matrix-like inner stabilisation.They are vented as recommended by JBL
The 2234 is powered with a Vincent 231, the rest with a Rotel 976. There are 2 Behringer 2496 working as crossovers , one for each side.
Food comes direct over the digital entrance of the DCXs or analog with a Denon PRA 1100 for recordplayer or FM radio.
In the near future i will change the Rotel to some class D amps and play around with other amplification to compare to the Vincent powerpack.
At the moment i comb my hair with the new Tool album.
Greetings from Spain
There are two JBL 2234 , two 2225, two 2445 and two 2405 Al
Upper woofer start at 60 Hz and all 4 go up to 650 Hz, where the horn comes in.The 2445 gos up to 10000 Hz.
Horn and most of the lower speaker cabinet ist made of stoneplates , concrete and concretefiber. The other used material is mostly multiply with a matrix-like inner stabilisation.They are vented as recommended by JBL
The 2234 is powered with a Vincent 231, the rest with a Rotel 976. There are 2 Behringer 2496 working as crossovers , one for each side.
Food comes direct over the digital entrance of the DCXs or analog with a Denon PRA 1100 for recordplayer or FM radio.
In the near future i will change the Rotel to some class D amps and play around with other amplification to compare to the Vincent powerpack.
At the moment i comb my hair with the new Tool album.
Greetings from Spain
Attachments
I do something similar, but I cross the mid-range horn from 440-2000Hz. From there, a Raal ribbon in a horn from 2000Hz to 20k.
My latest "just for fun" system for vinyl records. Can't stop listening! So accurate, transparent and wide stereo imaging. Close your eyes and everything you hear is drawn clearly in front of your closed eye vision!
With digital records, 2445J indeed sounds a bit metallic and harsh >7kHz but actually very sweet with vinyl. Much much better than Alpairs alone.
Alpair 10.3 ml-tqwt + JBL 2445J/2380A, crossed at 600Hz. 0.5ms delay.
Minidsp 2x4
Alto 2x31 EQ for horn correction
Bose entero 4400 4-ch amplifier
Onkyo cp-1027, Ortofon 5e cartridge
Since the name of the unit used was wrong, I will correct it.
Enclosure: Bass reflex, 23L
Tweeter Unit: Dyton AMT mini-8, 88dB/W
Squawker Unit: TangBand TBW3881SJF, 88dB/W, 1.3L
Woofer Unit: SB Acoustics SB13PFC-4, 89dB/W
Network Cross Over: 300Hz and 5kHz, 12dB/oct
I made this system because my wife and my mother-in-law didn't want to have some fridge-sized speakers in the livingroom and i refuse to buy 2019-sourround-design-speakas.
I made this pair from an old pair of Pioneer speakers with damaged cabinets that i bought on the flea market.
I added a 4 inch woofer i found and made a hornreflexsystem for them with a Karlson-like wide mouth.
Most of my materials i get from the scrapyard like the wooden plates or crossoverstuff from old speakers.
Here i used a sheet of flexible mdf to make the two dancing ladies.
Finally i casted a traktrixhorn-shaped waveguide for the tweeter from plaster.
It is a lot of experimenting and measuring that way, but the sound ist clear and horn-like fast.
So i'm ok with the sound and the ladies like the design.
Happy new year and saludos de Espana
I made this pair from an old pair of Pioneer speakers with damaged cabinets that i bought on the flea market.
I added a 4 inch woofer i found and made a hornreflexsystem for them with a Karlson-like wide mouth.
Most of my materials i get from the scrapyard like the wooden plates or crossoverstuff from old speakers.
Here i used a sheet of flexible mdf to make the two dancing ladies.
Finally i casted a traktrixhorn-shaped waveguide for the tweeter from plaster.
It is a lot of experimenting and measuring that way, but the sound ist clear and horn-like fast.
So i'm ok with the sound and the ladies like the design.
Happy new year and saludos de Espana
Attachments
Very well executed and I think Gaudi would approve, but is there a reason for the Swiss cheese in the upper cabinet?
I'm sorry, i just made some sketches and calculations on some sheets of paper, but they are lost by the times.
The waveguide was a leftover from some other tests with 1-Inch dome tweeters. I used it to level up the tweeter and to give it some more direcion and less echo in the room. The crossover seperates it from the speaker at the front at 3000Hz, 12dB, i think.
Both woofer work on the same, pretty big and damped enclosure with a mouth opening of about 40% membransurface. I had to widen up the mouth to place it with the opening to the floor so i checked if that karlsonstyle mouth extension would be a help (or if the ladies had to get a bigger booty).
The woofer in the back comes without crossover to give it a little mor virtual room, that's why i put the holes around it. It passes out at around 6000 Hz.
The upper part is connected with glue to the lower one with a ring of rubber.
@MtBiker
The cavities were a design feature, i attached a foto of the former use with some other speakers.
