coolhandjjl Posted January 22, 2013 Share Posted January 22, 2013 Trying to see if I like the Eliptrac 400 as a two-way with the Radian 950PB. According to Al at US Speaker, that driver with its aluminum diaphram is supposed to be the cat's meow as a two way in both high fidelity home use and pro use. Here are two graphs, one spectrum, the other with 1/3 octave smoothing. Response really falls off at 6kHz. Do drivers need a break-in period? Before I call Al, I'd like to trouble shoot here first. Quote Link to comment Share on other sites More sharing options...
coolhandjjl Posted January 22, 2013 Author Share Posted January 22, 2013 Spectrum Quote Link to comment Share on other sites More sharing options...
ZAKO Posted January 22, 2013 Share Posted January 22, 2013 Id call radian,,,My 950 bandwidth is better than that,, Quote Link to comment Share on other sites More sharing options...
coolhandjjl Posted January 22, 2013 Author Share Posted January 22, 2013 I emailed the graphs to US Speaker. I'm really bummed, the reason I popped for the big bucks on these was that they were the only ones with a non-titanium diaphram with extended response that were not hugely expensive. Pricey, yes, but not over the top. Quote Link to comment Share on other sites More sharing options...
Speakmeister Posted January 23, 2013 Share Posted January 23, 2013 Seems to follow what I would expect the power response of the driver to look like. Have you done this same test with titanium diaphragm drivers? How did they look? Can you describe your test setup? Quote Link to comment Share on other sites More sharing options...
coolhandjjl Posted January 23, 2013 Author Share Posted January 23, 2013 Pink noise with REW software, RTA measurements at 10'. Mic moved all around, this is the most even output. All preamp controls flat, no eq. Do I simply have to boost the bejeebers out of my highs on my preamp? With the impressive smooth graph from Radian of that driver, I thought I could get the same with flat controls. I have no titanium diaphram drivers test against. Quote Link to comment Share on other sites More sharing options...
BEC Posted January 23, 2013 Share Posted January 23, 2013 Here is a Faital HF-200 on the Eliptrac horn. Bob Crites Quote Link to comment Share on other sites More sharing options...
coolhandjjl Posted January 23, 2013 Author Share Posted January 23, 2013 So why does my response look as such on the high end? Quote Link to comment Share on other sites More sharing options...
BEC Posted January 23, 2013 Share Posted January 23, 2013 It is always a combination of driver and horn. Not every driver performs as well on every horn. I could show lots of examples where there was a horn I wanted to use with a certain driver that just would not work with that horn. But, there would be another horn that the driver worked well with and another driver worked well on that horn. You can bet that when Radian tested their driver for their published curve, they matched it up with a compatible horn. Bob Quote Link to comment Share on other sites More sharing options...
ZombieWoof Posted January 23, 2013 Share Posted January 23, 2013 here's the B&C DE750TN-16 & the eliptrac 400 Quote Link to comment Share on other sites More sharing options...
ZombieWoof Posted January 23, 2013 Share Posted January 23, 2013 that above graph done by ALK Quote Link to comment Share on other sites More sharing options...
ZombieWoof Posted January 23, 2013 Share Posted January 23, 2013 It is always a combination of driver and horn. Not every driver performs as well on every horn. I could show lots of examples where there was a horn I wanted to use with a certain driver that just would not work with that horn. But, there would be another horn that the driver worked well with and another driver worked well on that horn. You can bet that when Radian tested their driver for their published curve, they matched it up with a compatible horn. Bob They call that Cherry Pickin' around here ! I slapped driver , horn combo's together off posted MFGer graphs years ago & I never got a good mix that sounded any where good , I leave that now to the professionals like Bob Quote Link to comment Share on other sites More sharing options...
Speakmeister Posted January 23, 2013 Share Posted January 23, 2013 Bob and john, are you measuring indoors or outside? What distance Bob. Quote Link to comment Share on other sites More sharing options...
coolhandjjl Posted January 24, 2013 Author Share Posted January 24, 2013 Indoor measurements. I re-read today at 1 meter, dead center. I scaled my chart to match Bob's chart for EZ visual comparison. (Just a little less SPL, I forgot my hearing protection.) Flat, I see a 10dB drop starting after 5kHz. That is the green line. The blue is with graphic EQ boost of 10dB at 7680Hz, and 12dB at 15.5Hz. I haven't heard back from US Speaker yet, I'll call today. Al told me he'd guarantee I'd be satisfied with the drivers, so I may have to take him up on it and look at the Faital. Quote Link to comment Share on other sites More sharing options...
Marvel Posted January 24, 2013 Share Posted January 24, 2013 I'm just being curious... are you using active crossovers or passives, and if so, what are you using? Bruce Quote Link to comment Share on other sites More sharing options...
coolhandjjl Posted January 24, 2013 Author Share Posted January 24, 2013 Active, tried a TDM and a Furman, both 24dB/Oct Quote Link to comment Share on other sites More sharing options...
Deang Posted January 24, 2013 Share Posted January 24, 2013 There is either something wrong in the way you are measuring or there is something wrong with the drivers. I'm curious, why do you have a crossover in the system? You should be taking a raw measurement - microphone right at the mouth of the horn. Quote Link to comment Share on other sites More sharing options...
coolhandjjl Posted January 24, 2013 Author Share Posted January 24, 2013 There is either something wrong in the way you are measuring or there is something wrong with the drivers. I'm curious, why do you have a crossover in the system? You should be taking a raw measurement - microphone right at the mouth of the horn. Won' t sending full range signal to that driver damage it? Quote Link to comment Share on other sites More sharing options...
Deang Posted January 24, 2013 Share Posted January 24, 2013 I'm a damn fool. I've been out of the game too long. Of course, you need to protect the driver(s). With a passive network, I used to disconnect the other drivers, terminate the network with resistors, and then measure. Shame on Radian for not telling us anything about the horn they used. At any rate, take the measurement with the microphone right at the mouth of the horn. At 10 feet you're not measuring the horn, you're measuring the room! It would be a shame to have to send those back. I use the 1" version, and the high end is simply gorgeous. I listen to titanium diaphragms now and the scratchy zingy quality gets pretty irritating after a while. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 25, 2013 Share Posted January 25, 2013 Pink noise with REW software, RTA measurements at 10'. Mic moved all around, this is the most even output. All preamp controls flat, no eq. Do I simply have to boost the bejeebers out of my highs on my preamp? With the impressive smooth graph from Radian of that driver, I thought I could get the same with flat controls. I have no titanium diaphram drivers test against. Are you using a calibration file with that mic? I seriously doubt the Radian 950 needs the HF boost. How does it sound? I use REW, True RTA and ARTA, I get strange measurements from REW so I switched to ARTA, and got much better results. I dont think there is an issue with REW, I think its just a learning curve. Dave Quote Link to comment Share on other sites More sharing options...
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