Beyma list Le @1kHz 0,2mH and show impedance graphs, PRV in old datasheet never list Le and never show impedance graphs, where in new rev. they list a ultra low 0,03mH @1kHz.
Overlaid same scale and note latest rev of datasheet is used, the two resonse files is hanged on below as txt-file, rename to frd-file if that is needed.
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Hi Byrtt,
I got the new Le value from data sheet on Parts Express.
https://www.parts-express.com/pedocs/specs/294-2705--prv-audio-5mr450-ndy-specifications.pdf
Thanks for overlaying the graphs side-by-side.
I got the new Le value from data sheet on Parts Express.
https://www.parts-express.com/pedocs/specs/294-2705--prv-audio-5mr450-ndy-specifications.pdf
Thanks for overlaying the graphs side-by-side.
I think the comb interference (due to two radiators next to each other) can cause some issues in the very near field (circa 1m or less). My own experience with two TC9FD's in a double configuration did not sound bad at all when you are at a reasonable listening distance - typically 2.5m. When you put a microphone and measure and move the mic up and down, you will see <1dB comb interference, but it is not really audible.
The Nautaloss Ref Monitor
What is audible is the +6dB increase in sensitivty (at the same drive voltage). For the dual PRV 5MR450-NDY in parallel - that is a 100dB at 2.83v speaker. That is kind of scary loud/sensitive. It would mean very very little cone movement for reasonable listening sound levels of 80dB, which would translate to very low distortion, and hence, super super clarity.
Good catch a guess is either that measurement in general is flawed or they have a digital glitch or something distorting in 12-14kHz area, if one is a 5 incher dealer guess that curve could help sales a bit, if one is a tweeter manufacture one gets rolled over ...
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That’s absolutely fabulous!
I’m getting closer on My project.
I purchased 4-PRVs and going to try one vs two.
I just put the first coat of paint on and in the process of divorcing My JBLs
They’ve served their purpose well but on their Own they will flourish!
Very soon I will get to experience the FAST awesomeness!
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Some quick prototyping to tame that 7.5khz peak - a parallel filter of 0.12mH, 3.8uF (3.3 and 0.47 parallel) and about 35 ohms all in series with the driver - this is the 8 ohm version
The resistor can be varied to increase/decrease the peak
Preliminary listening shows that it has a slightly more bland presentation, but there is a loose connection somewhere in my setup, so maybe tomorrow i'll make a second filter set and listen to it in stereo
The resistor can be varied to increase/decrease the peak
Preliminary listening shows that it has a slightly more bland presentation, but there is a loose connection somewhere in my setup, so maybe tomorrow i'll make a second filter set and listen to it in stereo
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I agree, I like smooth FR drivers too but this one is special. Off axis is not a problem and the benefit you get is immense clarity from the low distortion while play loud. Perfect for heavy metal or classical which demand high dynamic range, high peak SPL, and low distortion. Compare them to Fostex or Lowther responses. None of those can get this SPL though.