Thanks for suggestions! I will unfortunately put in a restriction. Camilladsp isn't that very DIY hard coding? Unfortunately, data programming is definitely not my thing.
I understand that the system with several amplifiers must be synchronized and in balance with each other. I have three power amps and a preamp, but then I need to be able to plug all of these together in a sensible way.I don't really understand this. Trying to see how I can get it together but hm...
I understand that the system with several amplifiers must be synchronized and in balance with each other.I have three power amps and a preamp, but then I need to be able to plug all of these together in a sensible way...hm...
In any case I have these drivers go play with:
Bass:
Maybe if I buy two more so it's double 10 inches in each box.Experiences of and / or measurements Peerless SLS series?
Seems to be speaker element with good performance - price ratio.:) You who have used these speaker elements, what are your experiences? Are there any distortion measurements on any of the elements in the SLS series? I tried to find some but I did not find any.audiosciencereview.com
Midrange:
SB Acoustics SB15NBAC30-4 | HiFiCompass
The THD measurements at distance of 20 mm and voltage levels from 4 to 5.6 Volt were carried out with High Pass Filter "on" (4th order Butterworth type, 20 Hz cutoff, HPF4-20). The THD measurements at distance of 315 mm and voltage levels from 2 to 4 Volt were carried out with High Pass Filter...hificompass.com
Tweeter:
SB Acoustics SB26ADC-C000-4 | HiFiCompass
The THD measurements at distance of 315 mm and voltage levels 2.83 - 8 Volt were carried out with High Pass Filter "on" (2nd order Buttreworth type, 500 Hz cutoff, HPF2-500). The THD measurements at distance of 315 mm and voltage level 11.2 Volt were carried out with High Pass Filter "on" (2nd...hificompass.com
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Incidentally, the midrange and tweeter are used in this DIY:
Revel M105 Copy DIY build
After seeing the success of Directiva, But knowing the price, I wanted a nice small pair of passive bookshelf speakers for use in the second living room. I didn't need massive SPLs (if you need more SPLs the Directiva is much better - however that build is DSP XO + Multi Channel amplified). The...audiosciencereview.com
I have some advices to you.
1. Buy a 3 way dsp crossover with a digital input . A minidsp with only analog input is better than passive crossovers, but not really good sounding. Minidsp HD is better sounding but only for 2 channels.
2. You need good measurement gear, a good mic and a soundcard and a good program . You need to read how to do this in parallel with measuring and listen and look at the result. This will take a lot of time to understand that the mic dont hear sounds the way your brain/ ears hear. This learning process will take 2-3 years If you measure one hour every day . This is very fun and timeconsuming.
3. All measurements tell also lies. You have to read them the right way. Thereś no 100% thruth in what the measurements tells you.
4. Do the crossover frequency at the needed baffle step correction frequency - between the midbass and subwoofer.
use the formula made by Troels Gravesen = 11600/20 cm ( the baffle width ) = 580 Hz .
”Any driver mounted on a baffle will have an f3 = 11,600/width of baffle in cm. A driver mounted on a baffle of 20 cm with will be down 3 dB at 11,600/20 = 580 Hz. Making the baffle 50 cm wide the f3 is reduced to 232 Hz. Enough for a midrange driver working from 300-400 Hz to release its full potential without baffle step compensation.”
5. Use a polyprop capacitor protection in series with the tweeter , 22 uf or more.
6. school books filtering in a dsp is never correct - you have to measure everything. You have to eq and peq every driver mounted in the loudspeaker box with nearfield measurements . This takes a lot of time with measuring individual drivers on the loudspeaker baffle. Dont waste your time doing LTAS measurements from listening position- the result will only tell you lies above 300 Hz.
7. Buy or loan a good reference loudspeaker to compare with. I used a Genelec 8330 . This is important !
8. Dont expect to do better than the best reference loudspeakers in the first couple of years. The value is in the learning process.
9. DIY is great fun but maybe a big waste of time and money. Do it for the fun and learning and dont expect miracles. You cant do better than Genelec or Revel. They have the skills and we dont.
10. Your second hand selfmade DIY will be almost wortheless when you try sell it - no matter how good it is. If you pay 1500 dollars for the whole project you gonna loose money , maybe more than half of it, If you will sell your speakers.
11. The best audio affair is probably to buy a good second hand active loudspeaker. You will not loose much If you sell it later and the result will be good sounding. Maybe this is a boring advice, I know…
12. Construct your active loudspeaker treated the way it would sound good also with a passive crossover - meaning dont cheat on internal volume and directivity. You cant fool physics.
13. Read : ”Measuring loudspeakers by John Atkinson ” and buy Dr Tooles book and read it .
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