Ricci Posted August 24, 2016 Report Share Posted August 24, 2016 Measurements and test notes are live...Discuss here. It's a bad Mamma Jamma. Enjoy. Link to comment Share on other sites More sharing options...
lukeamdman Posted August 24, 2016 Report Share Posted August 24, 2016 Impressive! Those about 2" tall ports? Link to comment Share on other sites More sharing options...
Ricci Posted August 24, 2016 Author Report Share Posted August 24, 2016 Yeah 2" or 2.5". Jeff will have to confirm. Link to comment Share on other sites More sharing options...
lukeamdman Posted August 24, 2016 Report Share Posted August 24, 2016 This is nice since this and the S2 have the same drivers and amp. Good comparison to see what can be done with a larger ported cab vs. smaller sealed. Link to comment Share on other sites More sharing options...
chucky7 Posted August 24, 2016 Report Share Posted August 24, 2016 Good job Mr. Ricci! Were the CEA-2010 Max Burst numbers taken with the LF adjust at minimum or at the maximum? Data-bass says that "The 4000-ULF was run with the LF adjust at minimum for the rest of the measurements because this is closer to the native response with the least amount of boosting to the low frequencies." So my understand is that the CEA-2010 Max Burst numbers were taken with LF adjust at 'minimum'. Therefore, with LF adjust at maximum, the CEA-2010 Max Burst numbers should be even higher! Link to comment Share on other sites More sharing options...
shadyJ Posted August 25, 2016 Report Share Posted August 25, 2016 The LF adjust looks to be a kind of filter. Any filter loses its effect with a strong enough input signal, so I doubt that any change in it would have affected the CEA-2010 burst measurements. The only thing that would have changed is the CEA-2010 maximum burst measurements would have been reached sooner in the testing. Link to comment Share on other sites More sharing options...
Ricci Posted August 25, 2016 Author Report Share Posted August 25, 2016 Luke, The Captivator S2 drivers are apparently not the same. I assumed they were but Jeff said they are different. So my understand is that the CEA-2010 Max Burst numbers were taken with LF adjust at 'minimum'. Therefore, with LF adjust at maximum, the CEA-2010 Max Burst numbers should be even higher! That is not how it works. The LF adjust or other forms of EQ do not affect the maximum output achievable. Link to comment Share on other sites More sharing options...
Infrasonic Posted August 25, 2016 Report Share Posted August 25, 2016 Nice! Love to see an actual LLT on the market. Not bad. Link to comment Share on other sites More sharing options...
Infrasonic Posted August 25, 2016 Report Share Posted August 25, 2016 Good job Mr. Ricci! Were the CEA-2010 Max Burst numbers taken with the LF adjust at minimum or at the maximum? Data-bass says that "The 4000-ULF was run with the LF adjust at minimum for the rest of the measurements because this is closer to the native response with the least amount of boosting to the low frequencies." So my understand is that the CEA-2010 Max Burst numbers were taken with LF adjust at 'minimum'. Therefore, with LF adjust at maximum, the CEA-2010 Max Burst numbers should be even higher! Doesn't work like that. CEA Max Burst is based off the total system displacement and affected by short term compression effects. EQ has no bearing at all on Max Burst numbers. For example: if you were to compare the Stereo Integrity HS24 (DIY enclosure) to the DSS Mariana 24 (with it's own EQ set) you would still get identical Max Burst as they are both sealed systems with the same driver. You could alter the numbers by comparing the sealed system with a resonant system with the same driver and then the Max Burst would then change as the enclosure and vent system would provide further performance in addition to just the driver by itself. Link to comment Share on other sites More sharing options...
Kyle Posted August 25, 2016 Report Share Posted August 25, 2016 Josh, does this sub use 3 or 4" coils in the drivers? Link to comment Share on other sites More sharing options...
lukeamdman Posted August 26, 2016 Report Share Posted August 26, 2016 Josh, does this sub use 3 or 4" coils in the drivers? Fairly certain they're 4". EDIT: I'm wrong. Jeff noted below that they're 3". Link to comment Share on other sites More sharing options...
Contrasseur Posted August 26, 2016 Report Share Posted August 26, 2016 Really shows the output/size advantage in ported subwoofers over folded horns. The OS-LFU wins in efficiency and top end to no one's surprise, but a WHOLE OCTAVE of extra low end extension in a slighty smaller package? I'll bet the folks at JTR are justifiably bragging about this one! Link to comment Share on other sites More sharing options...
Jeff Permanian Posted August 26, 2016 Report Share Posted August 26, 2016 Really shows the output/size advantage in ported subwoofers over folded horns. The OS-LFU wins in efficiency and top end to no one's surprise, but a WHOLE OCTAVE of extra low end extension in a slighty smaller package? I'll bet the folks at JTR are justifiably bragging about this one! I don't think bragging is the right word but we are very happy with the results. The OS does have much topend with only one 18" driver however the more complex cabinet offsets most of the costs of a second driver. Doesn't work like that. CEA Max Burst is based off the total system displacement and affected by short term compression effects. EQ has no bearing at all on Max Burst numbers. For example: if you were to compare the Stereo Integrity HS24 (DIY enclosure) to the DSS Mariana 24 (with it's own EQ set) you would still get identical Max Burst as they are both sealed systems with the same driver. You could alter the numbers by comparing the sealed system with a resonant system with the same driver and then the Max Burst would then change as the enclosure and vent system would provide further performance in addition to just the driver by itself. Actually, the Mariana 24 would have much less output on the bottomend due to the much small enclosure. Plus, the SP1-4000 operates with 110 volt rails. Josh, does this sub use 3 or 4" coils in the drivers? We decided on the 3" coil because of the lower moving mass, lower inductance and increase Xmech. Link to comment Share on other sites More sharing options...
Infrasonic Posted August 26, 2016 Report Share Posted August 26, 2016 Ooohhhhhh...you know what I meant. EQ alone doesn't change the CEA max burst. Link to comment Share on other sites More sharing options...
Kyle Posted August 27, 2016 Report Share Posted August 27, 2016 I don't think bragging is the right word but we are very happy with the results. The OS does have much topend with only one 18" driver however the more complex cabinet offsets most of the costs of a second driver. Actually, the Mariana 24 would have much less output on the bottomend due to the much small enclosure. Plus, the SP1-4000 operates with 110 volt rails. We decided on the 3" coil because of the lower moving mass, lower inductance and increase Xmech. Looks like a solid driver Jeff. I'm especially pleased to see a good new ported performer on the market. Ported subs have tended to get overshadowed by horns these days. Link to comment Share on other sites More sharing options...
dgage Posted August 27, 2016 Report Share Posted August 27, 2016 Actually, the Mariana 24 would have much less output on the bottomend due to the much small enclosure. Plus, the SP1-4000 operates with 110 volt rails. First, congrats on another high-performing and nice subwoofer Jeff. You definitely have another winner. Regarding the Mariana 24, this is one reason Nick and I collaborated on the mkII drivers, to provide more motor force and work better in the smaller DSS enclosures. Link to comment Share on other sites More sharing options...
Jeff Permanian Posted September 25, 2016 Report Share Posted September 25, 2016 So, when are your subwoofers going to be tested? Link to comment Share on other sites More sharing options...
dgage Posted September 27, 2016 Report Share Posted September 27, 2016 So, when are your subwoofers going to be tested? Good question. It is on my list but I've had too much on my plate and it looks like I'm going to miss testing season with Josh so likely in the spring, which should allow me to expand enough to handle a theoretical increase in business due to a couple of reviews. Link to comment Share on other sites More sharing options...
Kyle Posted September 28, 2016 Report Share Posted September 28, 2016 Good question. It is on my list but I've had too much on my plate and it looks like I'm going to miss testing season with Josh so likely in the spring, which should allow me to expand enough to handle a theoretical increase in business due to a couple of reviews. What's this 24" you got? Link to comment Share on other sites More sharing options...
dgage Posted September 28, 2016 Report Share Posted September 28, 2016 Responded via PM as this thread is about the JTR Captivator 4000. Link to comment Share on other sites More sharing options...
Jeff Permanian Posted September 28, 2016 Report Share Posted September 28, 2016 We're trying to see if there is time yet this year for Data-Bass to test some more subwoofers. Link to comment Share on other sites More sharing options...
Jeff Permanian Posted October 3, 2017 Report Share Posted October 3, 2017 Our new, shallow Captivator 4000ULF-lp: http://jtrspeakers.com/captivator-4000ulf-lp.html Link to comment Share on other sites More sharing options...
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