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Sujet Should i get JBL or RCF

Ce topic est ancien et peut contenir des informations obselètes ou incorrectes.

Soon i may buying a couple or speaker, but wich one JBL or RCF I been using a jbl and with the appropiated amp work great, but I heard that the RCF are good too so I have some chosse already JBL PRX 710 & PRX 712
RCF art 710a mkii & art 712a mkii

Other point for both the watts are the some besid the speaker size, so 10" or 12" and why

Please replie with all you thoughts
 
Posté Tue 29 Nov 16 @ 1:56 pm
Well its all a matter of opinion to some degree with pro speakers. Personally the only PA speakers I would use would be QSC, RCF or Yamaha. About a year ago i spent a day at PMT in Birmingam with all of them lined up swapping between them. I chose the Yamaha, though mainly because of vocal clarity. My wife is a singer so that is the main concern for me. If i was buying again for djing it would be a close call between the RCF and QSC though I would probably go for the QSC but only on the grounds that I think they are prettier than the RCF which i find a bit ugly. I did buy an RCF sub though which is brilliant. That said JBL are part of the Harman group which make AKG, Soundcraft and so on, so very good company. Bottom line, go somewhere and have them set them up, listen to them and make a choice. EV used to be very good, but since moving production to China a couple of years ago, quality has gone down IMHO. We had just got rid of a Bose L1 system, which was terrible having had Dynacords before that for years. The bose was good quality sound, but not loud enough for anything more than a lounge. Dont look at the watts, its irrelevant, look at the SPL.
 
Posté Tue 29 Nov 16 @ 2:04 pm
RCF are monsters ART 715-A MK II these are very powerful speakers for any parties go and listen those highly recommended !
 
Posté Tue 29 Nov 16 @ 2:21 pm
Thanks nicolas if i dint put the 15 " because the price and Andy nowadays the all the desings are ugly if i have enought money i should go for line array, but going back too the question you said dont loock at the watts and since i dont know to much about what you mean SPL because i think i have to see how much power the spekers have, and im loocking at the RMS no to the PEAK and i heard that the QSC are good to but they have less RMS and so expensive maybe i have for the QSC k10 or k8 but the speaker size matter on some way?
 
Posté Tue 29 Nov 16 @ 6:58 pm
Wattage is just power, like the engine of a car. but a bigger engine doesnt mean more speed if its not a good engine. Watts is just how much power its using. SPL is sound pressure level. SPL is how loud it is to keep it basic. If you are doing clubs you need minimum 120 SPL. ideally 130 SPL. The Speakers I have, Yamaha DXR. They do a 8", 10", 12" and 15". All of them are 1100watts but obviously the bigger ones are louder and better.
 
Posté Tue 29 Nov 16 @ 7:14 pm
Andy7689 wrote :
If you are doing clubs you need minimum 120 SPL. ideally 130 SPL

Where did you get those figures from? That kind of level is up towards the threshold of pain, and could cause instant hearing damage.

Slipknot gigs (according to their vocalist) top out at 109dB.
 
Posté Tue 29 Nov 16 @ 7:26 pm
From 20 years of gigging and my spectrum analyser. I am not saying you need to be pushing that much out, but you need a system rated for it to have headroom. In a normal venue we run between 110 and 115 SPL every weekend, large venues and festivals over 120 SPL. im not sure where the 109 spl slipknot figure comes from, we were pushing more than that with a bose L1
 
Posté Tue 29 Nov 16 @ 7:33 pm
110dB in a normal venue? I suspect either your meter needs calibrating or it's on the wrong setting.

Do you not play in venues with sound limiters installed? They're generally set to 85-90dB.
 
Posté Tue 29 Nov 16 @ 8:15 pm
Hell no, venues are mostly pubs, social clubs, British legion type places, stuff like that. In the summer a lot of festivals, wallsall pride and things like that. Meter might be a couple of db out, but nothing more. Manowar the band acheived 139 spl in 2008 and british punk band the gallows 132. Slipknot must be quiet. So considering every 3db doubles the sound, 115 spl is loud but not too much, pain is 130. and dont forget, im measuring at 1m from speaker, not where the crowd is. Anyway, we are digressing from the OP. but my speakers are rated at 132db and i wouldnt want less.
 
Posté Tue 29 Nov 16 @ 8:37 pm
ok, let go back on track and thanks to everyone's point of view. if i have to look up to the SPL and take away the 12' size of all brands and keeping the 10' size well the JBL PRX710 have 133 max SPL, the RCF ART 710-A MKII have 129 SPL and if i add the QSC K10 they also have 129 SPL

look up here

RCF $599

ACOUSTICAL SPECIFICATIONS
Frequency Response -3 dB:50 Hz ÷ 20000 Hz
Max SPL:129 dB
Horizontal coverage angle:90°
Vertical coverage angle:70°
Compression Driver:1.0", 1.75" v.c.
Woofer:10", 2.5" v.c.
PROCESSOR SECTION
Crossover frequencies:1700 Hz
Protections:Thermal, rms
Limiter:Soft limiter
Controls:Volume, EQ shape
AMPLIFIER SPECIFICATIONS
Total power:1400 W PEAK
High frequencies:400 W PEAK
Low frequencies:1000 W PEAK
Total power:700 W RMS
High frequencies:200 W RMS
Low frequencies:500 W RMS

JBL $599
SPECIFICATIONS
^
Power Rating 1500 W
AC Power Input 100V - 240V~ 50/60 Hz
Frequency Range (-10 dB) Normal: 50 Hz – 19.6kHz
Boost: 42.9 Hz – 20kHz
Frequency Response (±3 dB) Normal: 63.5 Hz – 18.5kHz
Boost: 53 Hz – 18.6kHz
Coverage Pattern 100° x 60° nominal
Directivity Index (DI) 9 dB
Directivity Factor (Q) 8
Crossover Frequency 1.9 kHz
Maximum SPL 133 dB Dynamic Control (Input) dbx Type IV™ limiter circuit
Input Impedance 20K Ohms (balanced), 10K Ohms (unbalanced)
LF Driver 1 x JBL M110-4 250mm (10 in) woofer
HF Driver 1 x JBL 2408H-2 37.5 mm (1.5") annular polymer diaphragm, neodymium compression driver

QSC $699

SPECIFICATIONS K10
Configuration Multipurpose 2-way
Transducers
Low-frequency
High-frequency
10" cone transducer
1.75" diaphragm compression driver
Frequency Response (-6 dB) 60 Hz - 18 kHz
Frequency Range (-10 dB) 56 Hz - 20 kHz
Nominal Coverage (-6 dB) 90° conical DMT
Maximum SPL1 129 dB peak
Amplifiers
Power Output2 1000 W continuous Class D
(500 W LF, 500 W HF)
2000 W peak
 
Posté Tue 29 Nov 16 @ 9:11 pm
Well lets be honest, we are not comparing Skylec with RCF. They are all pretty similar and you're not going to be disappointed with any of them. Personal choice for me would be the QSC, I have heard them and they sound good. Ive not heard the JBL but they look comparable. The RCF i have heard too and they are a very good speaker. If you cant actually arrange to hear them first. I would recommend the QSC. But if you want to save a little i would go with the RCF.
 
Posté Tue 29 Nov 16 @ 9:40 pm
I would go for the RCF because of the better frequency response at the bass end - unless you're going to be using them with bass bins, in which case it would be less of an issue.
 
Posté Tue 29 Nov 16 @ 10:08 pm
About db's:

It all matters WHERE you count them. A typical speaker these days would produce 90-105db SPL by consuming just 1 Watt of power measured at 1m(~3feet) distance in front of the speaker (That's a typical "sensitivity" figure)
So, a typical modern speaker alone WILL produce 120-140db SPL measured at 1m distance in front of the speaker.
db SPL WILL degrade with distance. So yes, on a large stadium the "overall" SPL on its centre is as "low" as 110db But in front of the speakers it can be as high as 140-150db !!! (That's why there are bars placed in some distance from subs on those cases)

JBL PRX425 for instance has 100db sensitivity. This means that one speaker alone will produce 100db SPL by consuming just 1Watt of power at 1m distance, while it's max capacity is 134db SPL at 1m!

A 20KWatt RMS sound reinforcement system with 100db sensitivity will produce 150db SPL at 3 feet, 130db at 30 feet, 124db at 60 feet, 116db at 150 feet and 110db at 300 feet (peak values)
 
Posté Tue 29 Nov 16 @ 10:42 pm
Frequency response between 10 and 12 can be quite different, I never filter my top when used with subs and I like them as warm as possible when use on their own. You can lose as much as 10hz going from a 12 to a 10!

I think it is worth noting that RCF have gone a bit down hill in recent years.
 
Posté Tue 29 Nov 16 @ 11:05 pm


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