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10" W0v3 Series Single 4-Ohm Subwoofer Package (Includes Sub, Amp, and Amp Kit)
• Compact and Powerful
• NexD Switching Technology
• Differential-balanced Inputs
• LED-clipping indicator ring
• Monoblock Class D Subwoofer Amplifier
Designed to produce a healthy 250 watts into 2 ohms (14.4V, 1% THD), the JD250/1 amplifier is a great solution for powering subwoofers in a cost-conscious system. Our proprietary NexD™ switching technology delivers large amounts of real-world power output with excellent efficiency and ultra-low distortion.
The JD250/1’s controls are located on the input panel. while the power and speaker connections can be found along the opposite end of its extruded aluminum chassis. Signal processing features include a 12 dB / octave low-pass filter, with continuously variable frequency selection from 50-500 Hz, and a variable bass boost EQ. Dual-range, differential-balanced inputs are also on-hand, capable of accepting line-level and speaker-level signals. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard, along with a set of preamp outputs so you can easily pass signals to another amplifier.
The JD250/1 is also equipped with an onboard LED-clipping indicator ring, surrounding the input sensitivity control. This useful feature lets you easily set your amplifier’s input sensitivity, quickly and accurately, without special equipment. With the addition of an RBC-1 remote level control (sold separately), you can control the subwoofer level from the driver’s seat.
Let's get a little nerdy... A traditional PWM switching amp design uses a fixed switching frequency and varies the pulse width based solely on the audio input signal to the pulse modulator. This basic approach assumes some ideal conditions, like a rock-steady power supply, that do not necessarily occur in a real, in-car installation. Power supply sag with signal causes distortion at all power levels with these designs, even well below clipping. The cure for this is feedback (a corrective signal sent back to the input side), but this becomes impractical as the audio frequency increases, making it a good solution for band-limited (subwoofer) amps, but not for full-range amplifiers.
Taking the above into account when designing the NexD™ subwoofer amplifiers, we have taken the simple fixed PWM approach and enhanced it with a very high switching frequency: 240 kHz, which is about 4x higher than most Class D subwoofer amplifiers. This pushes the amplifier's bandwidth to at least 500 Hz with minimal distortion and improves efficiency, while keeping typically bulky circuity more compact. Your subwoofers will reward you with tight, rock-solid bass performance.
For the full-range NexD™ amplifiers and channels we applied a variable, ultra-high speed version of the NexD™ technology (switching at well over 400 kHz). In these designs, a self-oscillating modulator with "feed-forward" sends information about the instantaneous power supply voltage to the modulator, combining this with the input signal to cancel out any distortion due to supply voltage fluctuation. This reduces distortion prior to applying feedback, simplifying the overall feedback loop design.
Today’s vehicles are equipped with sophisticated electronics capable of generating noise and interference that can intrude into the audio path, ruining the listening experience. Most audio equipment uses single-ended, ground-referenced RCA jacks to receive audio signals. This means that the RCA shield is connected directly to the signal ground. This is a simple, cost-effective input design that works well for short runs in noise-free environments. In noisier environments, this method cannot reject the common mode noise that could be on both RCA conductors (shield and center conductor).
By having more than one chassis-grounded RCA shield on a device, single-ended input designs are also more susceptible to ground loops. If noise is present on both conductors while the shield is connected to ground, the input amplifier will amplify the noise relative to the grounded RCA shield. When there are multiple RCA connections or any other conductors subjected to a magnetic field, this will cause a difference in potential across the RCA loop to be amplified at the grounded RCA as noise (a classic ground loop).
JL Audio’s Differential-Balanced Input circuits measure the center pin of the RCA connection relative to the RCA shield, even when the shield is not connected to ground, and even when the voltages at both conductors are moving relative to ground. Because both the center conductor and the shield see high impedance to ground at the input, a ground loop cannot be formed, as there is no current flow to induce a voltage as noise. This works equally well with differential-balanced, or unbalanced signal sources, making this input architecture compatible with all standard car and marine audio equipment, using standard, unshielded, twisted-pair RCA cables. No special cables are required, unlike the fully balanced connections used in professional audio.
Another benefit of the Differential-Balanced Input design is that it easily accepts low-level and high-level signals from a variety of factory head unit outputs and amplifiers, including single-ended “ground referenced” sources, as well as Balanced or Unbalanced “Bridged or BTL” sources. This eliminates the need for Line Output Converters (LOCs) in most installation scenarios. The obvious question is: “Why don’t all car audio amplifiers use Differential-Balanced Inputs?” The answer is simple: it costs more. Executing a proper differential-balanced input section requires more components and better quality components than a basic single-ended design, so you generally won’t find them on less expensive amplifiers.
JL Model Comparison
|Model||RMS Power||Cone Material||Surround Material||Sensitivity (dB)||Frequency Response||Xmax (mm||Terminals||Made In America|
|W7 Series||500-1500 Watts||Polypropylene||Foam Overroll||82.7 - 86.3||15-250 Hz||19-32||Push Terminals|
|W6 Series||600 Watts||Polypropylene||Rubber||82.7 - 85.4||20-200 Hz||19||Push Terminals|
|W3 Series||150-600 Watts||Polypropylene||Rubber||80.5-87.90||20-250 Hz||8.89-15.5||Push Terminals|
|W1 Series||150-300 Watts||Polypropylene||Rubber||83.9-86.1||22-200||8-11||Push Terminals|
|W0 Series||300-500 Watts||Polypropylene||Foam||84-88.20||20-250 Hz||11.4-12.7||Push Terminals|
|WX Series||200 Watts||Polypropylene||Foam||86-87.17||22-250 Hz||10||Spade Terminals|
8 Gauge Premium (CCA) Copper Clad Aluminum Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 600 Watts - RED
JD250/1, 10W0V3-4, BAK82
Internal Product ID:
Nice package, quality wire but could more end connectors for the larger wire.
122found this helpful.
It's exactly what you need for your car amp installation. I bought this kit with Kenwood KAC-1502S amp for 75 bucks. Good deal from Sonic Electronix.
116found this helpful.
Great kit for the cost
Very nice kit for $18.
Wire seems adequately thick. Good quality fuse (not AGU) and fuse holder. RCA's feel durable. Decent assortment of accessories. All together a solid budget kit IMO.
107found this helpful.
Don't know what the other guy is talking about.
This kit was awesome and included with my package that I bought. In comparison to others for the same price, there is simply not a comparison and the other review is just wrong on so many levels I felt compelled to write this.
The reality is there are a lot of real shoddy amp kits and wire as a whole being used in car audio in terms of cheap amp kits that have over-insulating wires and fake gauge ratings, huge amounts of aluminum, lousy RCA cables, fuse holders and other accessories. BUT and a BIG BUT, this kit excels in those areas where others fall flat on their face. I have bought a few inexpensive 8 gauge kits in my day and XScorpion, Raptor, Install Bay and others haven't even given me the 8 gauge of wire that I paid for, and in some cases gave me wire that heated up to a dangerous level due to the actual make up of the wire.
I also literally laughed when I see that the other reviewer was intending to use spade terminals to connect his amp power and ground wire... It is for the SPEAKER wire knucklehead :-). I am an installer and the smaller accessories work just fine when you use them correctly. Most amps will still work with them when used with the speaker wire. Of course one can be used for the remote wire connection to the amp and the other end with the butt connector being used to connect to the stereo. The funny thing is, if you do not need them, who cares? It is like ordering this kit for a compact car or single cab pickup. You will not use all of the power wire for these applications, so do you complain that the manufacturer gave you extra wire? That just made me laugh.
Now, onto the other accessories. The AFS fuse and holder that are included are so far superior to others in this price range and the amount of copper (albeit CCA) is much better than others in the price range. Lastly, the RCAs included are awesome for the price. I cannot find ANYTHING to complain about here for $21.99.
All in all, you will not get a better value for the money.
101found this helpful.
Great wiring kit
works great on my MB Quart 2x100 watt amp.
99found this helpful.
Good kit for basic setups. Using it right now in my mothers system powering a simple 12. Could handle more if needed.
Pros: Handles power, Wires are HQ, More copper than rubber, Wires are good length, Fuse is HQ, Comes with lots of ties and rubbers.
I would recommend this kit to anyone who has a simple system. All around good kit.
104found this helpful.
Great kit for the price. the price is good. Long wires.
98found this helpful.
Good product for the price
Good wiring package, good quality fuse holder and wires, I would like more connectors on it and maybe some tube for the power wire, but overall is a good kit.
102found this helpful.
I used this kit to install a 2 channel Boss amp. The quality of the pieces in this kit is five stars, but I'm giving it 4 because it is my belief that to do a clean install you need (4) 8 gauge terminals (one at the batt, one at the amp, one at ground, one at the amp), not just two. I had to spend an extra six bucks at Orchard for the extra terminals, but since the cost of the kit here at Sonic was only $20 at the time, it was still a good deal.
95found this helpful.
The quality is good and everything I needed was there. All of the fittings were good. More than I needed. I would recommend this product because it delivers as claimed.
93found this helpful.
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