This amazing dual 15" 2-way speaker functions as a quasi 3-way: the upper woofers cover lows and mids, and the lower woofers are crosse...
This amazing dual 15" 2-way speaker functions as a quasi 3-way: the upper woofers cover lows and mids, and the lower woofers are crossed so they only cover lows-acting as built-in subwoofers. Progressive Transition WaveGuide horn design for enhanced high-end performance and SonicGuard circuitry to protect driver voice coils from feedback and clipping damage. Built with American-made JBL drivers, beefy JBL crossovers, roadworthy MDF cabinets, heavy-duty recessed handles, curved steel grilles, and rugged carpet covering. The JRX100 speakers are built to withstand the rigors of constant touring while delivering renowned JBL sound night after night.
JBL JRX125 Dual 15" 2-Way Speaker Cabinet Pair Specifications:
- Frequency range (-10dB): 38Hz-16kHz
- Frequency response (±3dB): 50Hz-12.5kHz
- Sensitivity (1w/1m): 100dB SPL
- Nominal impedance: 4 ohms
- Power capacity: 500W continuous, 1,000W peak
- Maximum SPL: 133dB
- Nominal dispersion: 90 degree x 50 degree
- Crossover frequency: 2kHz
JBL JRX125 Dual 15" 2-Way Speaker Cabinet Pair Features:
- Dual 15" woofers
- 2" high-frequency compression drivers with 1" exits
- Progressive Transition WaveGuide horns
- Systems function as quasi 3-way
- 3/4" acoustically superior MDF cabinets
- Trapezoid cab design for excellent projection
- 500W continuous power capacity
- 1,000W peak power capacity
- Heavy-duty recessed handles
- Heavy steel grilles
- 1/4" and Speakon connectors
- SonicGuard protection circuitry
- 18-1/4"W x 43-1/4"H x 17"D
- 94 lbs.
Posted by Mike from Upstate New York on Sep 19, 2008
Unlike modern powered cabs, (which definitely have some advantages) these relatively simple cabs need only one cable (the speaker cable) to hook them up. That greatly reduces setup complexity, hassle and time expenditure. You don't have to worry about EMI from power cables running near signal cables, grounds loops, separate outlets, extra AC filters etc.
Sound quality is excellent, assuming you use an adequate amplifier.
As for those who claim they need an extra sub... You must realize that in ANY enclosed space, the room can only handle so much low end. Once the room reaches a maximum SPL at low frequencies (150 or lower) you CANNOT get any appreciable increase in low-end volume. You only create phase problems, which translate to confusing low-end mud. These things go as low as any sane sober person ever would want, and they would certainly satisfy most crazy high people too.
The advantage to JBL's clever design here is that ALL the low end comes from a single PLANE, the front baffle of this cab. That insures your low-end is not only low and loud, but phase coherent. The frequency response is nearly flat down to 50 Hz and within + / - 10dB down to 38Hz.
That smooth low-end roll-off is beneficial. It helps prevent "room loading."
So unless you are playing outdoors, where the physics of acoustics change drastically, these cabinets are a great idea.
Also, they DO NOT reproduce very high frequencies VERY loudly. That's good inside a reverberant room. High frequencies are more directional than low frequencies, and they are also more reverberant. That means they reflect from surfaces like walls, ceilings, furniture etc. The net effect is that too much long-throw high end will "smear" the room with unpleasant and uncontrollable harshness. Short throw high end is an entirely different thing, but compression-drivers coupled to horns are definitely "long-throw" devices.
Here again, JBL's engineers know their business, and they made these things to compensate for room acoustics. These are basically flat from 50 to 12kHz. (the central "bulk" of musical frequencies)
Then they taper off at the very problematic super low-end, (below 50 cycles) and taper off above 12kHz. That makes your mixes sound better with less high-tech gadgetry and far less complexity. That means: good sound with less expense, less hassle.
Are these super hi-fidelity across the entire audible range? NO. For most rock bands, that is also a good thing. These will sound very clear yet "warm" to most people.
When you take everything into consideration, these old school cabs solve a lot of problems automatically. No; They are NOT intended for ridiculous super low-end. No; they do not provide ruler flat response up to 20kHz.
However, in most situations, those are good traits.
If you do numerous outdoor concerts at very high volumes, you will need a different system with MUCH more speaker area and a mix of long-throw and near-field high-frequency devices.
If you play in tall theaters or stadiums, you will need a splayed line array system with subs and sophisticated software control to get professional dispersion, frequency response and projection to every seat in the house.
For most rock bands, these cabs do a fantastic job because they are designed by trained acousticians who understand the laws of physics. They did the hard science so all you have to do is hook up your amps and rock.
The only reason I deducted one half point for value and features is I believe they should come with casters and a handle for this price.
For simplicity, power, dispersion and musical reproduction, these are hard to beat at any price.
