YAMAHA NS-M325

Commentary

A bookshelf type speaker system for the 325 series, a middle-sized theater speaker series.

A 10 cm cone type woofer is installed in the low range.
The diaphragm uses an advanced PMD diaphragm which is a complete improvement of PMD (Polymer Injected Mica Diaphram), the edge uses foamed EPDM surround, and the voice coil uses a hybrid spiral structure to directly apply drive energy to the diaphragm.
High-rigidity steel frame is used for the frame part.

A 3-cm dome type tweeter is installed in the high range.
The diaphragm is made of aluminum magnesium alloy. The diaphragm and voice coil bobbin are integrated into a DC diaphragm system. By eliminating the adhesive part, the weight of the vibration system is reduced and driving loss is reduced. In addition, the diaphragm surface is coated with a special coating to enable smooth and extended high-frequency reproduction.

The network section uses carefully selected parts such as a metalized PP capacitor made by Solen and a large-capacity coil with a winding diameter of 1 mm as well as a direct connection method.
In addition, two types of internal wiring materials, one for the woofer, the other for the main wiring and the other for the tweeter, have been tuned.

The enclosure is hermetically sealed.
The exterior has a natural wood finish of mahogany real wood.

A large speaker terminal with gold-plated brass machined processing is used for the input terminal.

The color was only cherry when it was released, but the one with black finish was added afterwards.

Model Rating

Method	2-Way, 2-Speaker, Sealed Type, Bookshelf Type, Anti-magnetic Design
Units Used	For low band : 10 cm cone type For High Pass : 3 cm Dome Type
Playback frequency band	65 hz to 50 khz -10dB 100kHz -30dB
Impedance	6 Ω
Output sound pressure level	86dB/2.83V/m
Allowable input	30W
Max Input	120W
Crossover frequency	2.5kHz
External dimensions	Width 150x Height 275x Depth 175 mm
Weight	3.8kg
Attachment	Speaker cable (10m)