JL Audio JD250/1 1 Ch. 250 Watt 2 Ohm Subwoofer Amplifier – #98360 | JL Audio 10W0V3-4 10″ 300 Watt 4 Ohm Subwoofer Driver -#92165 Bass Bundle

This Bundle Includes:

(1) JL Audio JD250/1 1 Ch. 250 Watt 2 Ohm Subwoofer Amplifier
(1) JL Audio 10W0V3-4 10″ 300 Watt 4 Ohm Subwoofer

JL Audio JD250/1 Monoblock Class D Subwoofer Amplifier – #98360

Monoblock Class D Subwoofer Amplifier, 250 W x 1 @ 2 ? / 150 W x 1 @ 4 ? – 14.4V

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.

NexD™ Switching Technology

Summary:
NexD™ amplifier technologies produce exceptional audio quality, unsurpassed total efficiency and high power from very compact amplifier designs.

Detailed Information:
Beginning with the original ‘Slash’ subwoofer amplifiers, JL Audio has been at the forefront of Class D amplifier design. Our NexD™ switching technology stems from our Class D expertise to deliver outstanding fidelity and efficiency, leading to compact amplifiers that deliver high power and exceptional value.

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.

The bottom line is simply great audio: clean, powerful and reliable.

Differential-Balanced Inputs

Summary:
JL Audio’s Differential-Balanced Inputs are engineered to combat induced cable noise, which is a common problem in car and marine audio installations. This technology allows for the use of conventional RCA cables, while delivering many of the benefits of a true balanced connection and accepting a wide range of input signal levels.

Detailed Information:
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 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 Audio 10W0V3-4 10-inch Subwoofer Driver -#92165

The 10W0V3-4 is a rugged performer with excellent excursion capability and linearity and an overall performance envelope that puts it right at the top of its price class. It features a beefy 2 in. diameter voice coil and our patented Elevated Frame Cooling design for enhanced power handling and reliability. The 10W0v3 is best used with amplifier power in the 75W – 300W range and is optimized to operate in a compact 0.65 cu. ft. (18.4 l) sealed enclosure, or a 1.125 cu. ft. (31.9 l) ported enclosure. Detailed enclosure recommendations can be found in the “Specifications” tab.

Precision-built bass

The JL Audio name means high-quality sound, and the 10W0v3-4 10″ subwoofer doesn’t come up short when delivering trademark JL performance. You’ll find patented technologies like an optimized motor system that promotes precise, linear cone movement, plus advanced cooling systems throughout the frame for rapid heat dissipation.

Long-lasting performance

This W0v3 Series sub features a tough polypropylene cone that resists flexing, and a durable foam surround that’ll stand up to hard use. The cone’s extra-long excursion capability lets it hit truly deep notes without distorting, while the hefty 2-inch voice coil drives the woofer accurately for top-notch performance under extreme conditions.

The patented elevated frame design delivers air flow directly to the voice coil, cooling it for better power handling. JL Audio designed this sub to work in compact sealed or medium-sized ported enclosures, and they offer an optional grille that’ll protect your JL Audio sub in its box.

Technology: Built-in U.S.A. with Global Components

JL Audio’s Miramar, Florida loudspeaker production facility is one of the most advanced in the world

At a time when most audio products are built overseas, JL Audio’s commitment to in-house loudspeaker production continues to grow. To pull this off in a competitive world market, JL Audio’s production engineering team has created one of the world’s most advanced loudspeaker assembly facilities and established a global network of quality component suppliers who build to our specifications. This, combined JL Audio’s commitment to state-of-the-art assembly technology, allows skilled workforce to efficiently build JL Audio products to extremely high quality standards, right here in the U.S.A.

Since most of JL Audio’s premium loudspeakers incorporate proprietary, patented technologies requiring specific assembly techniques, JL Audio find it is vital that the people who designed them have close access to the people manufacturing them. The following JL Audio products are built in Miramar, Florida factory, with global components.

Features

Dynamic Motor Analysis (DMA): DMA is JL Audio’s proprietary method aimed at improving dynamic motor behavior. As a result of DMA optimization, 10W0v3-4 motors display linear force over a long excursion range, and also maintain a stable fixed magnetic field in the gap over a wide power range. The result is reduced distortion, faithfully reproduced transients, and tight, clean, articulate bass.

Elevated Frame Cooling: The elevated frame design of the 10W0v3-4 delivers cool air through slots directly above the top plate to the voice coil. This not only enhances power handling, but also sound quality by minimizing dynamic parameter shifts and power compression.

Rear Gasket: The woofer has a rear gasket to provide an optimal seal when installing into the enclosure.

Long Excursion: The 10W0v3-4 subwoofer has 11.4mm of linear excursion, giving you louder bass with less distortion.

Enclosure Compatibility

Recommended Sealed Box Volume: JL Audio recommends a 0.65 ft³ sealed box. A diagram is provided in the owner’s manual for a sealed box with external dimensions of 18″ W x 11″ H x 9″ D, assuming 3/4″ thick material. (If you are using 5/8″ thick materials, you should subtract 1/4″ from each dimension.)

Recommended Ported Box Volume: JL Audio recommends a 1.125 ft³ ported box. A diagram is provided in the owner’s manual for a ported box with external dimensions of 23″ W x 12″ H x 13.625″ D, assuming 3/4″ thick material. (If you are using 5/8″ thick materials, you should subtract 1/4″ from each dimension.) A slot port measuring 10.5″ tall x 1.25″ wide x 32″ long is recommended, resulting in a tuning frequency of 30 Hz and a -3 dB point of 29.6 Hz.

10W0V3-4 Dimensions: