זוג רמקולים ימהה YAMAHA NS-AW150 Black

D

The NS-BP150 is a compact, two-way speaker with rear firing bass reflex port, equipped with a hemi-dome tweeter (“balanced dome” as Yamaha describes it) and an 11 cm diameter woofer. The drivers are Yamaha-branded and, like the rest of the speaker, appear to be made in Indonesia. The woofer boasts a truly impressive magnet, the size of the driver itself. It is filtered with a 0.6 mH coil, and the tweeter is filtered by a capacitor; I’ve not been able to read its value, too much glue! The crossover frequency is claimed to be at 5 kHz but, considering the 0.6mH inductance, it should be lower.

The MDF cabinet features some sound absorbing lining and a pretty unusual internal bracing arrangment that should minimize sidewall resonances. To further reduce resonances, the same bracing has notches with rubber inserts (see pic below), which should dampen vibrations. This bracing scheme is a refined touch and absolutely unprecedented in this category of speakers. The rear binding posts are well made and accepts bananas, bare wire, and spades, a welcome plus, instead of the spring-loaded posts standard in this price range. At the base of the speaker there are three (and not four!) truncated cone rubber feet. Unscrewing the driver bolts unlocks the entire front panel attached to them, another expensive design not usually found at this price level. The beautiful dust cover attaches magnetically to the front baffle. Summarizing, this speaker seems to have been designed with unusual care, given the extremely low price tag. My expectations, also considering the famous brand, were therefore high.

Frequency reposnse: 55-38000 Hz
Nominal impedance: 6 ohm
Crossover frequency: 5 kHz
Driver: 11cm (4-3/8″) woofer / 1″ “balanced dome” tweeter
Nominal power: 30 W
Peak power: 60 W
Sensitivity: 83 dB/2.83 V/1 m
Size: (W x H x D mm): 15,4 x 27,4 x 23,7 cm.
Weight: 1.2 kg