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MJ Acoustics Reference One MK-II Licht Eiken
[MJARefOneMK-]
1,271.01EUR

Reference I MkII Active Sub Bass System
The NEW Reference I MkII Active Sub Bass System with Twin crossovers and dual digital displays.

At a glance
Twin crossovers.
Dual Digital Displays.
Downward firing 10.5" long throw rigid aluminium driver.
150w True RMS amp panel with digital display.
XLR & RCA low level connectors.
High & Low level simultaneous connection capable.
Infinitely variable frequency contour.
Produces a superb low 10Hz.
Box in box rigid, ported cabinet.
Introducing an industry first, the awesome Reference I MkII active subwoofer from MJ Acoustics. Capable of producing a super low 10Hz using our latest D.A.M.P technology
with
dual digital displays and twin crossovers - taking the guess work out of setting up your subwoofer.

Amplifier
Resulting from years of development, the 150Wrms DC-coupled BI-Polar amplifier provides the engine to power the perfectly matched 10? ultra long throw aluminium woofer. The power supply has been designed to awesome requirements. We fit a 150va Double Insulated Toroidal transformer which has been designed specifically for this audio application. The rectifier used is a 10 Amp 60v version; it, of course, never sees 10 amps or 60 volts as this would equate to 600W?s but it is just an example of how over engineered this amplifier is, and substantiates why, when deep transients are required, the amplifier has enormous reserves of power to accommodate with utter ease even the deepest of explosions. To aid this the capacitors used are the large bucket type with a ripple current of 10 Amps each and selected because of their high temperature and minimal loss characteristics. The transistors used are the Metal Oxide Semiconductor Bi-Polar type and specifically designed for audio applications.

Crossover
The ?Reference I MkII? has the ultimate in sophisticated crossover circuits. Twin Digitally Accurate MicroProcessor controlled crossover circuits (D.A.M.P.), incorporate a digital display so that the upper response limit can be set in musically accurate variable increments between 30hz and 120hz. A "straight-through" LFE bypass facility is activated at one end of the Lo level controls travel which allows the input signal to bypass the filter circuit. The LFE bypass is used where an already filtered signal is offered to the low level input sockets. An example of this would be a sub output from a dedicated control pre-amplifier such as found in a Home Cinema system.

There are separate crossover and gain controls for high and low level inputs, a "straight-through" LFE bypass and an audibly transparent, "Automatic Speaker Protection" (A.S.P.) circuit which monitors the output stages for clipping and limits the cone movement if the amplifier is being over-driven. Professional Neutrik Speakon connectors are standard for the ?Reference I MkII?s? stereo high level input. An approved touch proof design is employed to cater for potentially high voltages that can be connected to it complete the high level input socketry. The ?Reference I MkII? also offers a balanced low-level XLR input and output for use with professional mixing desks and suitably equipped domestic systems. Additionally, gold plated RCA connectors are offered to cater for input and output. There is a relay in the signal output of the amplifier which waits for 2-3 seconds before it connects the loudspeaker. This allows the power supply to settle and prevents a loud thump that would occur without it.

Speaker
Using a die-cast solid aluminium chassis of monstrous proportions creates the rigidity that is so important in sub-bass speaker requirements. Any distortion of the chassis under extreme load will detract from the goal of pure sound wave formation. As we all know the creation of sound waves comes directly from the movement of the cone surface through the air. The longer the movement of the cone, termed as its excursion, the more air it moves and up goes the sound pressure level. We like to think of our 10" driver as the best of all worlds. It has agility, rigidity and declarative damping to enable the cone to move with lightning speed back and forth through the air. Incorporating an optimized linear motor with progressive suspension to avoid bottoming and allow maximum linear excursion. The result is extremely low total harmonic distortion (THD). The voice coil is aluminium and bonded to the aluminium cone to form a one piece structure which is much stiffer than could be achieved from a paper version. The result is a piston like action adding to the accuracy of the wave formation. Better heat dissipation and further reduced THD is achieved as a result of the rigid one piece aluminium cone structure. The massive rubber cone surround together with the semi-rigid lower damping apron serve to bring the cone to an almost instantaneous return to its resting place between transients. Truly, the muscle of the system and the working end of this bass producer.

D.A.M.P.
D.A.M.P. (Digitally Accurate MicroProcessor)
This Digitally Accurate Microprocessor controlled crossover circuit (DAMP)
The "Reference I MkII" has the ultimate in sophisticated crossover circuits. A Digitally Accurate Microprocessor controlled crossover circuit (DAMP), incorporates dual digital displays so that the upper response limit can be set in musically accurate variable increments between 30hz and 120hz for both high and low level inputs. A "straight-through" LFE bypass facility is activated at one end of the low level control travel which allows the input signal to bypass the filter circuit.

A.S.P.
A.S.P. (Automatic Speaker Protection)
This circuit monitors the output and the input of the amplifier. As the output reaches close to the limit of the power supply rails the input is instantly reduced to prevent the amplifier from clipping. The dynamic range of the amplifier is not compromised as the circuit has been set to activate at a point beyond the full dynamic range before protection is activated.

Specifications
150watt DC-coupled Bi-Polar Amplifier
Speaker and line level inputs with Gain Control Range 80dB
Neutrik Speakon connectors, (High level 100k ohm)
(10mtr Neutrik cable supplied)
Balanced (XLR) connectors (Gold Plated) (Low level 10k ohm)
Unbalanced RCA (phono) connectors (Gold Plated) (Low level 10k ohm)
2 x sophisticated crossover circuits - variable increments between 30Hz and 120Hz
"Straight-through" LFE Bypass filter switch
Phase Control infinitely adjustable between 0? and 180?
Frequency response 10hz to 120hz * A.S.P. (Automatic Speaker Protection)
D.A.M.P. (Digitally Accurate MicroProcessor)
Specially designed cabinet structure, volume, and configuration made from inert 18 & 30mm MDF
2 x Digital Displays with power output meter and frequency setting
Switched fused IEC mains input socket
270mm (10.5") Ultra Long-throw Aluminium Driver with heavy duty cast chassis magnet
3 year manufacturers return to base warranty
Dimensions (WxHxD ) 421mm X 491mm X 320mm
Weight 21kg (46.3 lbs)
Black Satin and Silver finish as standard with Real Wood Veneer finish an option at extra cost.

_____________________________________________________________________________________________________________________________

Specifications subject to change without notice. All rights reserved.

 

Für weitere Informationen, besuchen Sie bitte die Homepage zu diesem Produkt.
Dieses Produkt haben wir am Freitag, 14. Januar 2005 in unseren Katalog aufgenommen.

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