Best feature of dsp is versatilty, it is easy to save different eq/xo settings in presets. Then as time goes by, you can choose which settings sound best for the music you are playing - symphony, chamber, folk, rock etc.
The impressions of LR2 vs LR4 in last few posts match pretty well with my experience too.
The impressions of LR2 vs LR4 in last few posts match pretty well with my experience too.
Good to see my ears and brain work well and the impressions are in line with your experiences.
Today I tried to move lower crossover higher, from 180Hz to 230, 250, and 250 started to sound too punchy and dry, so I settled on 230Hz. The impression of woofer separation dissappeared, the drivers are now better blended, not LR2 blended, but definitely better, at the level where I did not notice any issue.
The speakers keep sounding better and better. String instruments (Steve Baker/Chris Jones - Slow roll for example) are pleasure to listen, with such a full range and detailed loudspeaker all albums sound diferent and I wanted to listen one by one again.
Today I tried to move lower crossover higher, from 180Hz to 230, 250, and 250 started to sound too punchy and dry, so I settled on 230Hz. The impression of woofer separation dissappeared, the drivers are now better blended, not LR2 blended, but definitely better, at the level where I did not notice any issue.
The speakers keep sounding better and better. String instruments (Steve Baker/Chris Jones - Slow roll for example) are pleasure to listen, with such a full range and detailed loudspeaker all albums sound diferent and I wanted to listen one by one again.
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I looked at 32W series more closely and did box modelling for some of the models. 4878T00 sensitivity is really quite low with 86dB/2.83V/1m. Generally it is not bad number, but for passive version it would be good to have higher sensitivity.
4878T01 is woofer version, and models well in ~65l BR, providing lower extension and the curve very similar to T00. T00 in 75l closed box has extension, bass level and quality that are kind of a benchmark for me now, so I am not after the tuning resulting in the lowest possible extension. 4878T01 has by 3dB mode sensitivity.
4878T11 high sensitivity woofer version, this has more limited lower extension, but seems to work in small volume.
8878T11 is high sensitivity woofer version, compared to 4ohm version requires larger volume but also goes lower, with nice slow gradual rolloff. Models very similar to 4878T01 and requires the same volume around 65l. Its foam surround makes me worried a but...it is coated, but protective grills will be mandatory to be sure sunlight will not shorten the lifetime of the surround. Sensitivity is same as 4878T01, ~89-90dB after bafflestep.
So, 4878T01 and 8878T11 seem to be the best candidates for passive design. Both offer sensitivity ~90dB, which is by 3dB more compared to 4878T00. They provide very similar performance in similar volume ~70l.
4878T01 is woofer version, and models well in ~65l BR, providing lower extension and the curve very similar to T00. T00 in 75l closed box has extension, bass level and quality that are kind of a benchmark for me now, so I am not after the tuning resulting in the lowest possible extension. 4878T01 has by 3dB mode sensitivity.
4878T11 high sensitivity woofer version, this has more limited lower extension, but seems to work in small volume.
8878T11 is high sensitivity woofer version, compared to 4ohm version requires larger volume but also goes lower, with nice slow gradual rolloff. Models very similar to 4878T01 and requires the same volume around 65l. Its foam surround makes me worried a but...it is coated, but protective grills will be mandatory to be sure sunlight will not shorten the lifetime of the surround. Sensitivity is same as 4878T01, ~89-90dB after bafflestep.
So, 4878T01 and 8878T11 seem to be the best candidates for passive design. Both offer sensitivity ~90dB, which is by 3dB more compared to 4878T00. They provide very similar performance in similar volume ~70l.
Dreew, it will depend on my impressions from Shamal project which uses MW16TX as midrange. I plan to start first listening tests in month or two.
I found the MW16TX and TW29TXN-B to be a very nice combination. I highly recommend it. With DSP, an LR4 crossover from 1.6k to 2.0k worked well. When I modelled it as a passive speaker, 3rd order electrical topology at 1.6k resulted in a 4th order crossover. I was able to duplicate (with simulation) my DSP crossover with a passive design.
https://www.diyaudio.com/forums/multi-way/366347-active-satori-textreme-13.html#post6551688
j.
https://www.diyaudio.com/forums/multi-way/366347-active-satori-textreme-13.html#post6551688
j.
I also find that the TeXtreme woofer and tweeter provide overall excellent musical coherence and smoothness of sound.
The low efficiency is sadly what keeps me from trying some of these higher end LF drivers, since I prefer to run passive xover. I'm sure those drivers you mentioned sound pretty nice and I feel like I'm missing out with my passive xover stubbornness.
I really love the larger SB drivers, specifically the 34NRXL75-8. It can be crossed a little higher and still sound right. I've pushed this driver past 300 hz LR2 and it still sounds just as tight and punchy as with a lower xover point along with a decent 6-7 inch midbass. I wouldnt go past 300 hz LP with that large of a driver regardless of brand, mainly due to the cabinet resonance issues that start croping up, which are rather hard to deal with on a larger / taller enclosure, especially if its ported. The IMD alone gets to be a problem with larger drivers that are run with higher LP frequencies.
Pida,
I’ve had a few large multi ways eg. WMTMW; WMTM all extending down to at least 30Hz or so (anechoic).; both active and passive, both monopole and dipole. (2 examples pictured)
In one of my recent experiments was to build separate woofer cabinets for the WWMTM (as designed, but not pictured) and test what the WWMTM sounds like in my room, vs separate W + WMTM and WMTMW, and the W + WMT resulted in the smoothest in-room response. I forgot to take photos of the setup or measurements. But imagine the WMTM in L/R stereo position plus additional 2 woofers, each in separate cabinets placed in different positions.
So I got the benefits of smooth integration of all drivers in a 3 way, but smooth in room response of 4 woofers spread out throughout the room.
I think it would be worth an experiment if you’re looking at a WWMT design. Certainly better for your back as well.
I’ve had a few large multi ways eg. WMTMW; WMTM all extending down to at least 30Hz or so (anechoic).; both active and passive, both monopole and dipole. (2 examples pictured)
In one of my recent experiments was to build separate woofer cabinets for the WWMTM (as designed, but not pictured) and test what the WWMTM sounds like in my room, vs separate W + WMTM and WMTMW, and the W + WMT resulted in the smoothest in-room response. I forgot to take photos of the setup or measurements. But imagine the WMTM in L/R stereo position plus additional 2 woofers, each in separate cabinets placed in different positions.
So I got the benefits of smooth integration of all drivers in a 3 way, but smooth in room response of 4 woofers spread out throughout the room.
I think it would be worth an experiment if you’re looking at a WWMT design. Certainly better for your back as well.
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The requests for WG were noticed, currently I am not able to prepare and ship the batch of WGs.
I could provide STL file for 3D printers though. Just send me an email to petr.kocourek@gmail.com
Of course I do not allow any commercial use of this WG or further distribution of waveguides.
Project is finished, today I installed new WGs and dekor rings. Cosmetics is now identical to front baffle painting, and 18WE ring does not buzz anymore.
I could provide STL file for 3D printers though. Just send me an email to petr.kocourek@gmail.com
Of course I do not allow any commercial use of this WG or further distribution of waveguides.
Project is finished, today I installed new WGs and dekor rings. Cosmetics is now identical to front baffle painting, and 18WE ring does not buzz anymore.
Attachments
Puppet, jcga, thank you.
Whole system is leaving this weekend so I have just few days to enjoy the listening yet.
Whole system is leaving this weekend so I have just few days to enjoy the listening yet.
Beautiful speaker and I bet it sounds sublime.
The elliptical dust cap makes me dizzy for some reason tho
The elliptical dust cap makes me dizzy for some reason tho