SP-55SM - Loudspeaker NEC - Free user manual and instructions

Product Type	Bookshelf Speaker
Brand	NEC
Model	SP-55SM
Speaker Configuration	2-way
Woofer Size	5.25 inches (133 mm)
Tweeter Size	1 inch (25 mm) soft dome
Frequency Response	50Hz - 20kHz
Impedance	8 ohms
Sensitivity	88 dB (2.83V/1m)
Power Handling (RMS)	50 watts
Peak Power Handling	100 watts
Recommended Amplifier Power	20-100 watts per channel
Crossover Frequency	3 kHz
Enclosure Type	Bass reflex (front-firing port)
Cabinet Material	MDF (Medium Density Fiberboard)
Dimensions (H x W x D)	305 x 195 x 260 mm
Weight	4.5 kg each
Finish	Black vinyl
Connectivity	Binding posts (banana plug compatible)
Placement	Bookshelf or speaker stand
Included Accessories	None (speaker only)
Safety Certification	CE, RoHS
Warranty	1 year (varies by region)

Frequently Asked Questions - SP-55SM NEC

How do I connect the NEC SP-55SM speakers to my amplifier?

Use the binding posts on the back of the speaker. Strip the speaker wire ends, insert into the posts, and tighten. Ensure correct polarity (+ to +, - to -). Recommended wire gauge: 16-14 AWG.

What is the recommended amplifier power for these speakers?

The speakers handle 20-100 watts RMS per channel. Use a quality amplifier within this range to avoid distortion or damage.

Can I place the SP-55SM on a shelf or do I need stands?

They can be placed on a sturdy shelf or on dedicated speaker stands. Ensure the tweeters are at ear level for best sound staging. Avoid placing them directly on the floor or in corners to prevent bass boom.

How should I clean the speakers?

Use a soft, dry cloth to dust the cabinet. For grilles, gently vacuum with a soft brush attachment. Never use liquid cleaners or abrasives as they may damage the finish or drivers.

What is the impedance of the NEC SP-55SM?

The nominal impedance is 8 ohms. Ensure your amplifier is rated for 8-ohm loads.

Can I bi-wire or bi-amp these speakers?

The SP-55SM has only one pair of binding posts, so bi-wiring or bi-amping is not possible without modification. Use a single run of speaker wire per channel.

Do the speakers come with a warranty?

Yes, typically a 1-year manufacturer warranty. Check with your retailer for specific terms. Keep your proof of purchase.

What is the frequency response of these speakers?

The frequency response is 50Hz to 20kHz, offering a balanced sound suitable for music and movies.

Are the speakers magnetically shielded?

No, they are not magnetically shielded. Keep them at least 30 cm away from CRT monitors or other magnetic-sensitive devices to avoid interference.

What type of speaker wire should I use?

Use 16-gauge or thicker copper speaker wire for runs up to 15 meters. For longer runs, 14-gauge or 12-gauge is recommended. Ensure the wire is properly stripped and connected.

USER MANUAL SP-55SM NEC

B: M4x16, 4 pieces
C: M4x8, 4 pieces
D: Washer, 8 pieces
E: Universal bracket, 4 pieces, different models

b	Added 70 in description	30.10.2014	Terje
a Changed bracket - edit text		31.01.2014	Terje
REV DESCRIPTION DATE APPROVED

REVISION HISTORY

Designed by Checked by Terje	Approved by	Date		Date17.01.2014
The Art of Sound Perfection			UNIVERSAL INSTALLATION GUIDE 46-55-65-70-80
					Edition Scaleb

The Art of Sound Perfection