Actually, Logitech Z906 and Logitech Z5500 have several differences such as audio performance for Logitech Z906 offer 500 watts (RMS) audio performance, while the Logitech Z5500 offers 505 watts (RMS) audio performance. About the digital input Logitech Z906 has 3, while the Logitech Z5500 has 2 digital inputs. But both of them already support Dolby Digital or DTS encoding. In this case the Z906 is a fully enclosed to decrease port noise distortion at high frequencies and Crossover is more stable. Beside that the Drivers use newer and more rigid baskets for greater reliability under high power situations. And for the power supply the Logitech Z906 was regulated, it is consistently delivers full power regardless of AC power of material being played and none collapsing. While for Z5500 power supply is unregulated, it is output power fluctuates with variations in AC power and Heavy and sustained bass can reduce total power.

In other hand about the power draw or energy efficiency, both of also differences Logitech Z906 are less than 400 watts at full power, while Logitech Z5500 has 800 watts at full power. For subwoofers enclosure also differences reduced size by 30% of Z-5500’s subwoofer while still exceeding THX’s rigid standards for performance.  For amplifiers both of them Improvement in Class-D amplifier electronic design reproduces undistorted peaks in the audio signals improving acoustic performance. Logitech Z906 can standby power <1 watt, while Logitech Z5500 can standby power watts.

Today Logitech comes with the new innovation product it a speakers Lapdesk named N550. It is already designed for laptops. The N550 offers several features such as integrated stereo speakers so you can get full rich online videos, full stereo sound of music and more speakers precisely on either side of your laptop. The next feature is ten-degree angled riser it can raise your laptop to make your neck or legs more comfortable when you are seated. Others features are stable surface that can use your laptop comfortably just about anywhere, soft air-mesh fabric will make feels good on your legs, lower power consumption, volume control, plug and play USB connection, and heat-shielding designed.

The Logitech explained specifications for N550 are that USB powered / 5 V, 500 mA maximum, 2” high-performance neodymium drivers with maximum 2 W power, Stereo and bass reflex performance, Air-mesh fabric includes polyester and polyurethane, 100% polyester fabric, Foldable laptop holders can help keep computers in place at an angle of up to 50 degrees, audio controls volume (up, volume down, mute), and USB 2.0 full speed connectivity. And for system requirements it can use on based pc windows and Mac computer. Beside that the Logitech give 3 year limited hardware warranty for the speaker lapdesk N550.

On California March 9, 2011 Logitech launched two series of Surround sound speakers are that Logitech® Surround Sound Speakers Z906 which can delivering 500 watts (RMS) of power, providing the Logitech Surround Sound Speakers Z906 are THX® Certified and creating a theater-quality audio experience in your living room. And the second is Logitech® Z-5500 Digital 5.1 Speaker System. Though both of them you can hear every detail in your movies, music and games.

In this case the two surround sound speakers from Logitech offers 500 watts of power and delivering thunderous audio which can shake your house, strict power standard to achieve THX certification it is means that you can make sure that your entertainment will sound the way it was meant to. Moreover offers Dolby® digital or DTS TM encoded soundtracks and onboard 5.1 digital decoding that enables detailed surround sound and amazing house-shaking bass, distortion-free bass, and side-firing subwoofer delivers 165 watts of pure. Not only that, though the Logitech surround sound speakers you can connect up to six audio devices simultaneously and including your TV, DVDR, DVD, Blu-Ray™ player, iPod® , PLAYSTATION®3, Xbox 360®, ,Wii™, and even your PC or Mac® laptop. And about the prices Logitech surround sound speakers Z906 about $399.99. More comparing specs Z906 vs Z-5500