JMlab UTOPIA

Commentary

This is a floor-type speaker system that uses our unique MVF technology F technology.

Polykevlar is used for the diaphragm of all units.
Poly-Kevlar fibers are assembled into two sheets of Kevlar fibers. They are sandwiched between fine hollow resin particles called microspheres, thereby achieving the opposite properties of light weight, rigidity, and moderate internal loss.
In addition, the same material is used for all units to unify the sound quality.

A 25 cm cone type woofer is installed in the low range.
The new Mechanical Vibration Free (MVF) technology has been introduced into the Woofer unit. In this technology, another magnetic circuit is installed on the back side of the magnetic circuit of the unit. By exciting this circuit, the mass in the opposite direction is created. This completely cancels the reaction which occurs in the back side when the unit vibrates. By maintaining the mechanical balance, the stress on the frame and cabinet is suppressed, and the vibration factor which affects by the strain is eliminated.

Two 12 cm cone type skokers are mounted in the middle area.
This unit is equipped with a diffuser in the center to equalize the radiated sound wave.

A 2.8 cm inverted dome type tweeter is installed in the high range.
High-efficiency design by dual voice coil is adopted, and crossover frequency is set to low band by excellent frequency characteristics.

The rear panel is equipped with a network circuit so that the inside can be seen.
The network elements include large polypropylene capacitors, self-inductive low-resistance air-core coils, wiring materials, connectors, and other parts carefully selected according to our own standards.

The unit layout is arranged in such a way that the tweeter is sandwiched between two skorkers from the top and bottom. The quasi-coaxial configuration is designed to achieve point sound recording. In addition, slits are provided on the baffle surface of this quasi-coaxial configuration to prevent sound wave diffraction and suppress the disturbance of characteristics.
The enclosure uses a bass reflex system. This enclosure is designed with vibration control as a theme. It has been thoroughly studied what vibration mode the material has and how vibration from the unit propagates from the frame to the cabinet when the unit is mounted.

Model Rating

Type	3-Way, 4-Speaker, Bass Reflex System, Floor Type
Units Used	For low band : 25 cm cone type For Medium Range : 12 cm Cone Type x2 High Pass : 2.8 cm Reverse Dome Type
Crossover frequency	120Hz/2.5 kHz, -18dB/oct.
Frequency characteristic	27 Hz to 25 kHz ± 3 dB
Nominal impedance	6 Ω
Max Input	Continuous : 150W Music : 200W
Output sound pressure level	93dB/W/m
Input terminal	Bi-wired connection support Banana plug specifications
External dimensions	Width 330x Height 1,200x Depth 412 mm
Weight	81kg