QSC K12's SOUND CHECK with JBL JRX125 Dual 15" 2-Way Speaker Cabinet + Crown XTI1000

Benefit Dance that raised $5000 dollars on Saturday July 11th.

Just purchased the QSC K12's and decided to do the David and Goliath test of speakers. The QSCK12's sound quality was complimented by many and the JBL's were constantly complained about being too loud. So its quality vs quantity. This was a fairly big hall with about 300 people that danced from 8 to 1am.

Keep in mind the JBL JRX125 has Dual 15's, where as the QSCK12's has a 500watt 12 inch cone and a 500 watt compression driver.

JBL INFO:
JBL JRX125 Dual 15" 2-Way Speaker Cabinet Features: * Dual 15" woofers * 2" high-frequency compression driver with 1" exit * Progressive Transition Waveguide horn * System functions as quasi 3-way * 3/4" acoustically superior MDF cabinet * Trapezoid cab design for excellent projection * 500W continuous power capacity * 1,000W peak power capacity * Heavy-duty recessed handles * Heavy steel grille * 1/4" and Speakon connectors * SonicGuard protection circuitry * 18-1/4"W x 43-1/4"H x 17"D * 94 lbs.
QSC INFO:


Active or Passive Active

Frequency Response 52 Hz - 18 kHz (-6 dB)

Power Capacity 1000W Class D (500W LF, 500W HF)

Maximum Sound Pressure Level (SPL) 131 dB peak (1 meter)

Nominal Sensitivity 75° Conical (-6 dB)

Impedance XLR & 1/4" : 40k Balanced / 20k Unbalanced XLR & 1/4" : Mic Mode: 2260 Balanced RCA : 10k

Low Frequency Driver 12" Cone Transducer

High Frequency Driver 1.75" Diaphragm Compression Driver

Enclosure Material Impact Resistant ABS

Input Connections Balanced Female XLR & 1/4" Combo, Line/Mic Level Input Balanced Female XLR & 1/4" Line Level Input Stereo RCA Line Level Input Dual Balanced Male XLR Full Range Line Level Output Balanced Male XLR "Mix" Output

Dimensions 23.7 x 14 x 14" (603 x 356 x 356 mm)

Weight 41 lbs (18.6 kg)

Category:

Howto & Style

Tags:

• QSC
• K12's
• SOUND
• CHECK
• with
• JBL
• JRX125
• Dual
• 15
• 2-Way
• Speaker
• Cabinet
• Crown
• XTI1000

[TheNikola0nikola]

Saying that they have 500w on the compression driver is simple marketing trick(everyone does that this days).They use the same 500w amplifier for both drivers(it improves logistics/spare parts management) but the amp it is limited by the DSP to no more than 100w continues power. If you want to improve your JRX125 buy another XTi1000 and use both amps in bridged mode, set the processor inside the XTi to not go below 40Hz and waste SPL energy. And last: upgrade to Selenium compression drivers.2/2

[mike71flores]

@TheNikola0nikola exactly....spend more money....no thanks

[TheNikola0nikola]

Only ONE Crown XTI1000 simply is not enough for driving two JRX125. Second, comparing JRX125 with K12 is like comparing family sedan car and Comanche state of the art helicopter. Both brilliant for what they are designed to do but totally non-comparable. Compare K12 with PRX612M, both are Bi-Amp and they don't have typical crossover, instead they have proprietary DSP crossover/equalization for getting maximum results from each driver inside the speaker box. 1/2

[mike71flores]

@TheNikola0nikola qsc by far....i've had both...

[bennyboytx]

I hope the laptop isn't the source of your audio...

[mike71flores]

@bennyboytx yes it is....It can provide higher quality audio than a CD player....

[doraysmith]

QSC by far

[mustafa1984455]

GAVE ME JBL ALL DAY LONG AND I HAVE BEEN PLAYING A LONG TIME SINCE I WAS 18 AND I AM 47

[petrusmalk]

Great Sound!

[CarlosFlo94]

Meh my crap JRX sound more clearer than yours o.O IDK that's me loaded with the DriveRack PA+ and RMX 2450, but either way I used my MRX series :P

[Malaikatrendy]

Jbl's need to be at same height. Just sayin'.

[polandftw]

i'm planning on buying some k12's but i was wondering if they have enough bass for more raving type music, i know they ddont have subs but still have a lot of bass

[DJJASONPRODUCER]

@DjBobbyLosAngeles srx series are good but u need amps and stuff prx i love there sub xlf thats why i got 4 and 2 k12s =] mrx jrx eon NO!