tecnogadget
Addicted to Fun and Learning
ohh damm this review resembles my correlation with awful harsh, bright and distorted sound from PA systems at shaddy venues when I was a teenager haha
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JBL SRX835P Reviewed (Powered Monitor)
- Thread starter amirm
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This speaker seems to be let down by the 3" Ti dome compression driver which has resonant behaviour, high THD and breakup. However in PA some people (not me) actually like the sound of Ti dome breakup believing it gives a HF that is more audible at far distances. This is such a prevalent viewpoint that B&C produced a modern Ti dome driver which deliberately has a massive resonant peak:
https://www.bcspeakers.com/en/products/hf-driver/1-3/8/de910tn
Attached are some measurements of a P-Audio BM-D446 on a PH-4220 horn at 2.83V. This is a 1.75" Ti dome compression driver with a polymer surround so should breakup higher in frequency and with better damping. Measurments are in room and time gated. Although the y axis is log scaled you can see that it does not have this high frequency spike.
https://www.bcspeakers.com/en/products/hf-driver/1-3/8/de910tn
Attached are some measurements of a P-Audio BM-D446 on a PH-4220 horn at 2.83V. This is a 1.75" Ti dome compression driver with a polymer surround so should breakup higher in frequency and with better damping. Measurments are in room and time gated. Although the y axis is log scaled you can see that it does not have this high frequency spike.
AnalogSteph
Major Contributor
This one looks like it would EQ well, as LW, ER and PR seem to be in fairly good agreement overall. Spinorama is not likely to reflect low-end and low midrange response entirely accurately as these would normally be sitting on the ground, not floating in thin air (but that's basically an issue for all floorstanders).
I agree treble distortion is on the high side, but it only gets truly bad when we are well underway to 10 kHz where output requirements tend to be fairly modest. Compression drivers in horns are rarely a pretty sight (H2 levels are just inherently high due to air compression) but not sure why things are going south the way they are up there.
I agree treble distortion is on the high side, but it only gets truly bad when we are well underway to 10 kHz where output requirements tend to be fairly modest. Compression drivers in horns are rarely a pretty sight (H2 levels are just inherently high due to air compression) but not sure why things are going south the way they are up there.
Those would have looked way worse I bet.
The SRC835P has a 35mm pole cup and fly points, it would normally be pole mounted, flown or ground stacked so that the treble horn was above head height to ensure good projection into the crowd. I guess at home you could use it as a floor-stander but this isn't the intended use.
tecnogadget
Addicted to Fun and Learning
To be honest...yes haha. My comment was mostly because we are used to a high standard with JBL pro audio lately.
King_Pin
Member
Thanks Amir. I have wondered how their passive PA speakers would be as a high sensitivity load for a flea powered amp because Klipsch Heresy and Cornwall do well in that application and are similar to PA speakers in design. I love the aesthetic of the grey paper cone on these JBLs too.
Unfortunately this is worse than I had expected, especially having looked over a lot of the graphs published on the JBL website.
Quite strange not to have a default DSP setting in place, but perhaps this means we get to see something closer to the passive siblings, making the review much more useful.
The super narrow directivity is also bad for any kind of HiFi, unfortunately.
Now can someone send a JBL 4722n cinema speaker for testing?
I had 3 of the 4648's. Got them for $250 each.
I played them and then gutted them for the 2226h 15" drivers and the horn for another project. The shop next to me came in the next day and asked if there was an earthquake or something cause they had pictures, vases,
restorer-john
Grand Contributor
Helicopter
Major Contributor
I recall a good sale on the Eons last year, around 25'% off. Not sure if Amir gets a discount, but might be worth waiting.
Guess you did get the point, I was making ...
@amirm Thank you for this review. It is nice to see how modern PA speakers measure. However, I am at a loss with your subjective comments. It is a PA speaker and you do not recommend it for Hi-Fi. It is not a word I normally use but nothing else will fit to this moment: Duh!
Meanwhile, you think it may be OK for outdoor or parties, which the speaker is designed for and marketed as such. What do you expect such a comment achieve other than make us think you are not trusting the manufacturer?
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Do you know what LFE means?I had 3 of the 4648's. Got them for $250 each.
The shop next to me came in the next day and asked if there was an earthquake or something cause they had pictures, vases, View attachment 144027shelves and much more covering the floor. Happy I had them gone before they came in.
This site has been helpful to me regarding measurements of "pro-gear" such as studio monitors, amps, and ADC's.... if "pro-gear" can measure well and sound subjectively good in a domestic setting it can be a relative bargain compared to "Hi-Fi" products. In the case of this speaker it would have been interesting if the measured performance showed that they could be used / EQ'd to be a kind of "cheap M2". Obviously this is not the case which is useful information to me.
Tom C
Major Contributor
I am very curious how you got them for $250 each.I had 3 of the 4648's. Got them for $250 each.
The shop next to me came in the next day and asked if there was an earthquake or something cause they had pictures, vases, View attachment 144027shelves and much more covering the floor. Happy I had them gone before they came in.
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Similar to the older JBL Pro PRX635 measured by the 3D3A Lab in Princeton: https://www.princeton.edu/3D3A/Directivity/JBL Professional PRX635/index.html
I agree with the objective, measurement parts of the review. It is very useful. My comment was on the subjective part as I clearly wrote.
OP
- Thread Starter
- #59
Seems like nobody stocks them....
Hello,
a PA Speaker nice, I hope there are more to come.
I think the speakers will sound much better than a lot of people think by having a look at the measurements only.
The distance will also play an important role to judge the on axis frequency response, since the horns provide not a spherical directivity and the bass did. So there is a difference in spl drop per distance.
Best
Thomas
a PA Speaker nice, I hope there are more to come.
I think the speakers will sound much better than a lot of people think by having a look at the measurements only.
The distance will also play an important role to judge the on axis frequency response, since the horns provide not a spherical directivity and the bass did. So there is a difference in spl drop per distance.
Best
Thomas
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