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Showing posts with label ACTIVE SUBWOOFERS. Show all posts
Showing posts with label ACTIVE SUBWOOFERS. Show all posts



image credit: JL Audio

Powered Subwoofer with Dual 13.5-inch Subwoofers, 4500 watts


Your first look will tell you that you are looking at something special... your first listen will confirm it beyond a shadow of a doubt.

The beauty of the Gotham® v2 extends well beyond its exotic design and exceptional craftsmanship, aiming right at the emotional core of musical and cinematic enjoyment. This is a subwoofer system with limits that exceed the needs of the typical home theater application, delivering a weight and integrity of reproduction that can only come from a system that is always in control. Its allure lies as much in its ability to convey subtleties as in its prodigious output capabilities. It is simply devastating.

A luxurious, handcrafted gloss-black finish is complemented by machined aluminum and stainless steel accents for a look and feel that fits perfectly with the finest home furnishings. More importantly, the beautiful cabinet houses a pair of JL Audio's highest-technology Subwoofers. When demanded by program material, the Gotham's prodigious switching amplifier can deliver 4500 watts of RMS power, to take full advantage of the twin drivers' four inches of peak-to-peak excursion capability. This ensures that the Gotham can breeze through material that makes other subwoofers go into clipping, limiting or distress.


A very complete set of signal processing features is easily accessible on the top surface of the Gotham. These include a highly flexible low-pass filter, variable phase, switchable polarity, e.l.f. trim and our powerful Digital Automatic Room Optimization (D.A.R.O.) system. A calibrated microphone is included for the D.A.R.O. system. Input connections are made via unbalanced RCA connections or balanced Neutrik® combo XLR/TRS jacks. Also included is an XLR output to connect a second Gotham® v2 as a slave unit.

Listening to a Gotham® v2 reveals an entirely new dimension of subwoofer performance... a dimension so satisfying that listening to lesser subwoofers will forever become an act of compromise.

Finish: Gloss Black, hand-finished to the highest furniture-grade standard.

Grille finish: Black fabric (separate grilles for drivers and controls)

Enclosure Construction: Fiberglass, 2-inch (52 mm) wall thickness

General Specifications

Enclosure Type Sealed, with non-parallel walls

Enclosure Finish Black Gloss

Frequency Response (anechoic) 19 - 112 Hz (±1.5dB)

–3 dB at 17.5 Hz / 120 Hz

–10 at 14 Hz / 150 Hz

Effective Piston Area (Sd) 214.70 sq in / 0.1386 sq m

Effective Displacement 773 cu in / 12.7 L

Amplifier Power 4500 W RMS short-term

Power Mode(s) Off, On or Automatic (Signal-Sensing)

Light Modes Off, On or Dim


Signal Processing

Unbalanced Inputs Stereo or Mono (two RCA jacks)

Balanced Inputs Stereo or Mono (two female XLR jacks)

Speaker/High-Level Inputs N/A

Input Grounding Isolated or Grounded

Input Modes Master or Slave

Level Control Reference (fixed gain) or Variable, from full mute to +15dB over reference gain

Filter Mode(s) Low-Pass

Filter Slope(s) 12/24 dB/octave

Filter Frequency Range 30 Hz - 130 Hz

Filter Defeat Function Yes

Polarity 0 or 180 degrees

Phase Variable, 0 - 270 degrees

Extreme Low Frequency (E.L.F.) Trim Variable, -12 dB to +3 dB at 20 Hz

Line Outputs N/A

Output to Slave Balanced (one male XLR jack)

Calibration Mode Digital Automatic Room Optimization (D.A.R.O.), incudes laboratory-grade microphone

Physical Specifications

Width (W) 21.50 in / 546 mm

Height (H) 34.13 in / 867 mm

Depth (D) 24.0 in / 610 mm

Net Weight 360 lb / 163 kg

Note: Height dimensions include feet.

Digital Automatic Room Optimization (D.A.R.O.)


JL Audio's exclusive D.A.R.O. technology uses a powerful on-board DSP to automatically optimize the subwoofer's in-room frequency response. This leads to a superb listening experience, no matter where the subwoofer is placed.


Detailed Information:

In typical listening spaces, subwoofer and listener placement have a profound effect on the accuracy of low-frequency reproduction. While we always recommend that you place your subwoofers in good-sounding locations, we know that these often can be impractical locations. In the real world, subwoofer placement almost always involves a compromise between sonic performance, practicality and aesthetics.

To face this dilemma head on, JL Audio subwoofer systems incorporate a clever piece of technology called Digital Automatic Room Optimization (D.A.R.O.). The D.A.R.O. system self-generates a series of calibration tones, measures the frequency response at the listening position, and automatically configures an 18-band, 1/6 octave equalizer for a flat end-result. The system effectively allows for smooth, well-balanced sub-bass from a variety of locations that would have been less than ideal without D.A.R.O.

Connect the included calibration microphone to the front panel of the subwoofer.

Press the calibrate button on the front panel of the subwoofer.

Hold the microphone at the primary listening position for about a minute.

A few minutes later, you have completed this one-time setup routine.





Active bookshelf speaker system, 2-way, with bass reflex, series: Reference, power: 2 x 50 W (Class A/B), frequency range: 40 Hz - 25 kHz, audio inputs: 1 x RCA, 1 x XLR, technology: Wide Dispersion Technology (WDT), dimensions: 300 x 185 x 250 mm, weight: n/a.

Acoustic Energy AE1 ACTIVE - high-end active bookshelf speakers - are part of the AE Reference line. AE1 monitors have been produced in various modifications for 30 years, it was the very first and extremely successful model created by Acoustic Energy engineers. The company decided to celebrate this anniversary by releasing an active version of its bestseller - AE1 ACTIVE.

The speakers are based on the legendary Acoustic Energy AE1 Classic and AE Professional professional monitors, but unlike the latest AE1 ACTIVE, they are designed for listening to music at home. Each speaker in the AE1 ACTIVE is powered by its own 50-watt Class A/B amplifier (4x50 watts per pair). Analog power supply - from a linear source with a network transformer. Crossover filters are active 4th order. The signal is divided at a frequency of 3500 Hz. There are no capacitive coils or capacitors between the amplifier output and the speakers, which means that the useful signal is divided without loss, and the speakers are perfectly controlled by the amplifiers.

The signature aluminum mid/bass driver is a modification of the 125mm AE1 Classic driver. To provide additional rigidity and strength, circular notches are applied to it. It also improves the properties of the magnetic coil. Soft PPU-suspension provides easy movement and mobility of the diffuser. Tweeter of own design with aluminum dome. Optimal RF dispersion is provided by the proprietary WDT (Wide Dispersion Technology) waveguide. The slotted phase inverter is located on the rear side of the case. The level of high and low frequencies can be adjusted within +2 dB. Each of the monitors has a separate volume control and two pairs of inputs: XLR and RCA. Frequency range - from 40 Hz to 25 kHz with ± 6 dB unevenness. Available in black or white piano lacquer, as well as real wood veneer finishes with high gloss lacquer.

Two class A/B amplifiers with 2x50W linear power supply in each speaker. Fully analog architecture of the amplifying path. Crossover filters - active 4th order, provide an absolutely linear separation of sound by frequency. Own volume control for each speaker. Signature Acoustic Energy tweeter with aluminum dome for even wider operating range and minimal distortion. Acoustic lens (Wide Dispersion Technology (WDT)) for uniform dispersion of sound in space...




Name ACOUSTIC ENERGY AE1 Active Gloss Black

Manufacturer ACOUSTIC Energy (UK)

Series Reference

Device type Active speaker system

Number of lanes 2

Supply voltage, V 110 / 240

Color Black lacquer (Piano Black)

Dimensions, mm 300x185x250

Weight, kg n/a

Warranty 12 months

Main characteristics

Acoustic design Phase inverter

Rated power, W 2 x 50

Frequency range, Hz - kHz 40 - 25

Number of speakers, pcs 2

Number of strips, pcs 2

tweeter 1 x 27mm aluminum dome encapsulated in a WDT (Wide Dispersion Technology) waveguide

Speaker woofer 1 x 125mm extruded aluminum with ceramic cone

Phase inverter slotted, rear

Peculiarities Separate volume and tone controls. Audio inputs: 1 x RCA, 1 x XLR

Kanto Sub 8

SUB8 is a sealed box front-firing subwoofer offering 250W of powerful bass extension, perfect for music or home theatre. A precise low-pass filter makes sub8 a perfect match with any Kanto speaker, allowing you to dial in the perfect cutoff frequency. Its 8” paper-cone driver enables true sub-bass reproduction with low-end that has real weight. Phase adjustment, power saving auto-off and full L/R line level input round out this high-performance package.

Kanto Sub 8

Kanto Sub 8


sub8 features a specially designed grille which protects the driver from impact and dust while allowing sound through with minimal diffraction.


Every space is different. Precise dials for volume and cut-off frequency offer exacting, responsive control that lets you shape your bass to fit the unique character of your room.


sub8 is available in a Gloss Black, Gloss White, Matte Black, and Matte Grey to suit your personal style.


sub8’s acoustic MDF enclosure is engineered to reduce undesired resonance and reverberation inside the box, providing clean, deep sound.


Although designed to be a perfect match with Kanto speakers, sub8 features stereo inputs allowing use with any source. Anything from vintage stereo receivers to high-end amplifiers with stereo sub output can be connected, so you don’t have to sacrifice quality for convenience.


Solid rubber feet keep sub8 firmly planted on any surface. De-coupling the housing from the surrounding environment allows for unmatched clarity and separation from lower-mid frequencies, and reduces vibration.

Kanto Sub 8



Woofer: 8 inch Paper Cone Driver


Amplifier Type: Class D

Nominal Impedance: 4 Ohm

Sensitivity 1W/1m: 88 dB

Total Harmonic Distortion: < 0.3%

Low-Pass Filter: 40 Hz – 120 Hz

Phase Switch: 0° and 180°


Input: 1 x RCA L/R Line Level

Input Sensitivity: 100 mV

Frequency Response: 35 Hz – 175 Hz

Input Voltage / Frequency: AC 100V – 240V 50/60 Hz (auto switching)


Power Output: 250W

Standby Power Consumption: < 0.5 W


Dimensions: 11” W x 11” D x 11.9” H (28 x 28 x 30.3 cm)

Net Weight: 16.8 lb (7.6 kg)

Gross Weight: 20.9 lb (9.5 kg) (boxed)

Shipping box dimensions: 15.6″ x 14.4″ x 14.3″ (39.6 x 36.6 x 36.3 cm)


Power cord