Yamaha RX-Z9 NS-777, NS-555, NS-333, NS-C444, NS-225F, NS-M225, NS-C225, YST-SW225, EF Series

EF Series Home Theatre Speaker Systems

High performance speakers designed for home theatre systems. The EF (Elliptical Form) Series feature Waveguide horns, PMD (Polymer-injected Mica Diaphragm) woofers and highest quality internal Monster Cable wiring for total enjoyment of digital movie sound and music sources, plus elegant Yamaha traditional piano finish cabinets.

NS-777	NS-555	NS-333	NS-C444
3-Way, 4-Speaker Bass-	3-Way, 4-Speaker Bass-	2-Way Bass-Reflex	2-Way Acoustic Suspension Centre
Reflex Speaker System	Reflex Speaker System	Speaker System	Channel Speaker System

225 PMD Series Home Theatre Speaker Systems

These slim, high-performance speaker systems are exactly what today’s home theatre enthusiasts are looking for. Their luxurious open pore finish is matched by powerful, accurate sound reproduction from PMD cone woofers and aluminium-magnesium dome tweeters with DC-Diaphram™ (integrated diaphragm and voice coil).

The YST-SW225 is designed to acoustically match the speakers in the 225 PMD Series, and is recommended to be sold together with them (Specifications are on p.32).

NS-225F	NS-M225	NS-C225		YST-SW225
2-Way Bass-Reflex	2-Way Acoustic	2-Way Dual-Woofer Acoustic		Advanced YST II and
Speaker System	Suspension Speaker System	Suspension Centre Speaker System		QD-Bass Subwoofer
• Birch finish available	• Birch finish available	• Birch finish available		• Birch finish available
for YHT-640 (see p.33)	for YHT-640 (see p.33)	for YHT-640 (see p.33)		for YHT-640 (see p.33)
EF Series	NS-777		NS-555		NS-333	NS-C444
Woofers	Dual 20cm PMD cone		Dual 16cm PMD cone		13cm PMD cone	Dual 13cm PMD cone
Midrange Driver	13cm cone with Waveguide horn		13cm cone with Waveguide horn
Tweeter	2.5cm aluminium dome		2.5cm aluminium dome		2.5cm aluminium dome	2.5cm aluminium dome
	with Waveguide horn		with Waveguide horn		with Waveguide horn	with Waveguide horn
Magnetic Shielding	Yes		Yes		Yes	Yes
Bi-Wiring Connectivity	Yes		Yes
Input Power (Max/Nominal)	250 W/100 W		250 W/100 W		150 W/60 W	250 W/100 W
Frequency Response	30 Hz–35 kHz		35 Hz–35 kHz		60 Hz–35 kHz	55 Hz–35 kHz
Sensitivity	89 dB/2.83 V/1 m		88 dB/2.83 V/1 m		87 dB/2.83 V/1 m	89 dB/2.83 V/1 m
Impedance	6 ohms		6 ohms		6 ohms	6 ohms
Dimensions (W x H x D)	276 x 1,100 x 390 mm		222 x 980 x 345 mm		200 x 320 x 213 mm	514 x 190 x 213 mm
Weight	24.4 kg/unit		20 kg/unit		5.5 kg/unit	7.3 kg
225 PDM Series	NS-225F		NS-M225		NS-C225
Woofers	Dual 8cm PMD cone		Quad 6.5cm PMD cone		Dual 8cm PMD cone
Tweeter	3cm aluminium-magnesium dome		3cm aluminium-magnesium dome		3cm aluminium-magnesium dome
Magnetic Shielding	Yes		Yes		Yes
Twin Bass Reflex Ports	Yes
Round-Shaped Bass Anchor	Yes
Luxurious Real Wood, Open Pore Finish	Yes		Yes		Yes
Input Power (Max/Nominal)	120 W/40 W		120 W/40 W		120 W/40 W
Frequency Response	60 Hz–50 kHz		65 Hz–50 kHz		65 Hz–50 kHz
Sensitivity	86 dB/2.83 V/1 m		86 dB/2.83 V/1 m		86 dB/2.83 V/1 m
Impedance	6 ohms		6 ohms		6 ohms
Dimensions (W x H x D)	230 x 1,050 x 236 mm		107 x 360 x 134 mm		440 x 94 x 133 mm
Weight	7.7 kg/unit		2.4 kg/unit		2.8 kg

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