Nagaoka MP-150 sound box

Nagaoka MP-150 MM sound box

A moving permalloy sound box that offers an excellent price/quality ratio. Aluminum tapered needle shaft and elliptical grinding.

Founded in 1940, Nagaoka, Japan, manufactures its sound boxes meticulously by itself from start to finish, also working as a subcontractor for many big brands. The company’s job description includes fine machining of metals, magnetic materials, and gemstone materials.

The world-renowned Nagaoka sound boxes and Audio accessories represent the traditional high Japanese concept of quality.

Technical information:

• Needle shaft: Aluminum, tapered
• Needle grinding: Elliptical 0.4 x 0.7 mil
• Output voltage: 4.5mV (5cm/sec)
• Channel balance: better than 1.5dB
• Frequency response: 20-20000Hz
• Channel separation: 24dB
• Mass: 6.5g
• Needle weight: 1.5-2.0g
• Load: 47k
• Dynamic flexibility: 6.0 x 10-6 cm/dyne
• Static elasticity: 18 x 10-6 cm/dyne