First off I have my own version of these also. Mine are active with 1500 watts going to them. And my Buddy's and I can't ever see the woofers move. Not even playing at 85db average. These speakers are so quick we jumped several times during our listening session.
Let me know what internal damping you used. And how much. That's the only thing I didn't like when I bought the cabinets. Mine are definitely unique.
Let me know what internal damping you used. And how much. That's the only thing I didn't like when I bought the cabinets. Mine are definitely unique.
Lol I thought this was a different thread than the one I already was in. Sorry for the repetitive response. Although I don't think I had 1500 watts on tap back then. And yes those amps are also Diy. Orchard Audio Ultra modules x3 with a Micro Acoustics Cobra S2 power supply with Mundorf cap upgrade per amp. All Neotech OCC copper and silver internal wires. Speakers are wired with it also. Only speakers I can turn up to where my chest can feel it. But they are still so smooth. It is incredible. I don't know if they have a limit. They actually handled full volume for about 5 seconds with my previous 200 watts to the tweeters,mids,and Woofers. I couldn't believe I didn't blow them up. Or harm them. They still sound beautiful. The volume thing was my grandson stepped on the remote and it went all the way to max and I panicked and couldn't figure out what I was doing. Then I came to and hit the power button. I was afraid to turn it back on. I was in fear that my tweeters were smoked. When I turned it back on I couldn't believe it. They sounded just as good as they did before. WOW is all I have to say.
I tried out the MW19TX-8 with TW29R-4 a while back but got stuck on how to fill in the 50hz dip in my samples (as in the SB Acoustics published FR chart). I could (and did) fill the dip with resonance but that sounded out of place surrounded by near perfection. Looking carefully at the multiple response measurements posted recently in this thread, even the 3-way Sassandu using doubled MW19TX-8 as woofer only (and 24-component XO for shaping), has the 50hz dip relative to 40hz and 60hz. I would still like to find a good-to-40hz design that used the 7.5" MW as MW, without so noticeable a dip below 60hz. Any help greatly appreciated.
Seems to me it would be very difficult to install/fasten the Dacron in a preassembled cabinet. The narrow design and internal bracing would make getting something like a staple gun into the correct position nearly impossible. I suppose glues (could get messy) and friction fit are the best option for the prefab cabinet. It was pretty straight forward with the open box. I glued the wool felt using Weldwood floor adhesive. Stapled the Dacron in strategic places and friction fit in others. I suspect that the additional damping material has the biggest impact in the closed midrange section. Probably less impactful in the lower registers. That is where the bracing and thicker walls do the job of reducing cabinet resonances.
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The 50hz dip in the SB measuements is part of the room that SB acoustics measured their drivers, ignore it in your crossover.
That's a lot of power! I've run them in triode with KT150s at 45 watts and felt there was plenty there for simpler music. I've also used my Anthem STR amplifier rated at 600 watts into 4 ohms which is great and way more than needed for larger scale recordings. I do think your approach of running an active system and being able to adjust the FR to your room and preferences is the way to go. In my current setup, I'd like a little more bass output and in hindsight, would/could have tuned the upper registers down a bit for better balance to my ears. However, I'm planning to give these to my Dad as a retirement gift (finally! he's 72) and figured a simpler setup would work best for him. I'm looking forward to hearing them in his room and suspect there will be more bass reinforcement there. Do you use the subwoofer for 2-channel listening? Always curious.
You can see the 50hz dip in both measurements you yourself posted. Unsmoothed it is much worse.
https://www.diyaudio.com/community/...ndu-speakers-kit-offering.381372/post-7228426
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Yes but do you notice only the red measurement has the dip but not the green one? Red is one speaker, green is the other. It is room & placement related, not due to the speaker itself.
Also, I've asked SB about these dips and they confirm its room related, not due to the driver/speaker.
How do you know it wasn't the "green" one that got filled-in by room-bounce? All are room-related; the 50hz dip could have been even worse anechoic or close-up but "room-related" only half as bad. And the showroom measurement too? In fact what I had heard from mine at ~10cm: sharp drop just below 60hz; 40hz at least as loud as 50hz (consider equal-loudness curve this is highly unusual); both cone-direct and at ML-TL exit. Consistent with SB official FR chart.
In my experience, the Sasandu with the passive crossover are well driven with 25w amps in a medium size room
So,
1) Worth considering low power but very high quality amps to see if the Sasandu Textreme improves further! There are many very affordable amps measured on ASR to consider
2) Measuring the impedance of drivers in cabinet, then modelling correction circuits in Xsim could make them even more dynamic as they would be even easier to drive, especially the bass.
Can't asnwer you, i am also a diyer experimenting & learning along the way, best to contact them for a better answer?
https://sbacoustics.com/contact/
Do share with us your findings!
Wchang, from 10cm? Then you very likely heard nf response of the woofer, which has naturaly the dip at port tuning frequency.
It's about 50/50 whether I use the subs. I have an Anthem AVM90 and use ARC Genesis to eq. But without the subs I like the fact that you can hear more into the music. I think the subs take away the quickness of the Sasandu's bass. And in my room they can produce flat bass down to 25hz without the subs. I have a smallish totally sealed room. My audiophile buddy's couldn't believe I was running them full range when they came to hear them. One got up to make sure they weren't on. I actually have 2 Rythmik E15HP2's. The other one is in the back of the room.
I like your Dacron idea. Yes it was really difficult stuffing the Sasandu cabinets. I had hot glue going everywhere. Luckily if you let it dry it comes right off. I was worried it would damage the paint. I tried to figure out a better idea but all the ideas had risks. So I just bought a smaller glue gun and sticks and went for it.
Hello @fishball79
Thank you for your review
I am lurking around the SB Acoustics ARA, EKA Ceramic and Ayra
I want to place the speakers in a small room around 11.5 sqm
Short listening distance of around 2 meters
I mainly listen to classical music and Jazz
What one of these speakers work for this set up?
Thank you
@fishball79
Thank you. I would go for the SB ARA with the standard Sartori speaker drivers. Or are the ARA Beryllium and TX Versions worth the higher price?
Thank you. I would go for the SB ARA with the standard Sartori speaker drivers. Or are the ARA Beryllium and TX Versions worth the higher price?