Phil Lewandowski wrote on Wed, 18 March 2009 21:24 |
Very Nice Review Evan You found out a lot of what I expected. They both have their pros and cons. They both get loud, which I found to be the case with the U15's. But I think the QRx212's having the dual 12" give it that edge in SPL you like! I will have to mess with those DSP settings that you used to help to top end of the U15 and refine them a little more! I haven't been able to get outside here yet in Cleveland and it is finally getting nice so hopefully can get outside and Smaart the U15 and mess with EQ besides the basics I use. The other thing that is interesting in your Smaart measurement for th U15 there isn't the characteristic 190hz bump that is usually at least 5dB above sensitivity. Interesting Out of curiosity, was this a U15 made after April 2007 when they changed the crossover design, because I know that is when you notice the horn get really harsh, when you started using Matt Viv's handicapped Cabs, pre-2007 cabs. Thanks! Phil |
Matt Vivlamore wrote on Wed, 18 March 2009 23:03 | ||
Phil the cabs in the Test are the U15v2 (per say)... But to my knowledge, my U15v1 where in fine/complete condition. You are thinking about Eric's v1 that Evan original reported the Horn Break-up noise. |
Matt Vivlamore wrote on Wed, 18 March 2009 23:03 |
From Evan's review, I wonder if Yorkville built a different crossover network or 1" driver. I had to take out a good bit around 3.5k. |
Phil Lewandowski wrote on Thu, 19 March 2009 08:20 | ||
Are you thinking that the U15's Evan tested are different in the HF driver region for some reason than yours? Take Care! Phil |
Evan Kirkendall wrote on Fri, 20 March 2009 12:48 |
Phil, That's what my graph looked like on the ground plane. There's a bunch of low mid coupling going on, and you basically get the response of 2 boxes on the ground plane. Hence why I wanted to get more of a free space response. My coherence was no less then 50% anywhere on both measurements. Evan |
Adam Kane wrote on Tue, 24 March 2009 21:42 |
Did you run the U15's with or without their processor? Based on first hand experience with these speakers (several installs), they smooth out dramatically in the upper end and seem to have more output below 80hz or so without a significant decrease in headroom, when used with their proprietary processor (U15P) I don't recall if Yorkville has any info on their site as to what exactly the processor does, although I'm sure you could figure it out after spending some time analyzing one. I enjoyed your comments on the QRX212 as I've not used these before. Thanks for the real-world info. |
Adam Kane wrote on Tue, 24 March 2009 22:13 |
I'm all but positive it does something up high. We had an install with a couple hangs of these. The processor was back-ordered for a few days. I decided to fire them up w/o the processor (mainly just to make sure everything was wired correctly) and noticed they were lacking in the low end (no subs in this system) and when pushed a little harder, the 4-5k range seemed to get out of hand. I also noticed the hole in the lower mids that Evan mentioned. Not at all what I expected. When the processor came in, I went right down and racked it up. I played the same music I played without the processor and it sounded like a completely different system. Plenty of low end, and the high-end didn't get abrasive when played loudly. The low mids (say 250-400ish) all the sudden had a nice presence without muddying things up. All this without a single change in the other DSP in the system. Maybe it is a mind thing. I wish I had performed actual measurements both before and after the processor was wired in. I have no proof as to why, but they definitely sound better with the processor. |