JMLAB Chorus707

Commentary

A bookshelf speaker system from the Chorus series.

A 18 cm cone type woofer is installed in the low range.
The diaphragm of this unit uses a polyglass diaphragm. This material has been used only in high-end models until now. It is made of cellulose fiber cone with excellent resolution and coated with hollow fine particles of extremely hard silica glass resin with a special adhesive. The combination of cellulose with high internal loss and light weight and a highly synthetic silica glass layer enables smoother and more accurate sound propagation. Butyl edge is used for the edge part.
The Chorus707 uses the traditional 1-inch double voice coil design of JM Lab.

A newly designed 2.6 cm inverted dome type tweeter called TPC is installed in the high range.
In this TPC, the voice coil is rigidly fixed to the center of the dome to improve energy propagation while maintaining mechanical coupling between moving parts. In addition, the diaphragm is made of titanium monoblock and is damped with 5 μ m thick polymer. In particular, linearity in the 15 kHz to 22 kHz band is taken into consideration. In addition, a foam ring is installed between the MAG top of the net plate and face plate to eliminate unnecessary vibration.
A phase plug is installed on the front of the unit to make sound wave diffusion uniform.

The enclosure is designed with a bass reflex.
The front baffle is designed with a dark gray finish of highly rigid MDF material combined with a cherry finish cabinet.

It is compatible with the Chorus series common speaker stand sold separately.

Model Rating

Type	2-Way, 2-Speaker, Bass Reflex System, Bookshelf Type
Units Used	For low band : 18 cm cone type High Pass : 2.6 cm Reverse Dome Type
Frequency characteristic	54 Hz to 22 kHz
Impedance	8 Ω
Output sound pressure level	91.5dB/W/m
Crossover frequency	2.4kHz 12dB/oct.
External dimensions	Width 230x Height 490x Depth 310 mm
Weight	10.2kg
Sold Separately	Speaker Stand L-60 (1 unit, ¥ 15,000) Speaker Stand L-40 (1 unit, ¥ 12,500)