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Comparison Harman Kardon BDS 635 vs Harman Kardon BDS 880 BQ

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Harman Kardon BDS 635
Harman Kardon BDS 880 BQ
Harman Kardon BDS 635Harman Kardon BDS 880 BQ
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Acoustic system
Acoustics
5.1
shelf
5.1
shelf
Front (RMS)50 W/channel65 W/channel
Rear (RMS)50 W/channel65 W/channel
Centre (RMS)50 W/channel65 W/channel
Subwoofer (RMS)100 W/channel200 W/channel
Total power (RMS)350 W525 W
Frequency range20 – 20000 Hz20 – 20000 Hz
Sensitivity90 dB
Impedance8 Ohm
Wireless connection
Active subwoofer
Amplifier
Number of channels5.1
Front50 W/channel65 W/channel
Rear50 W/channel65 W/channel
Centre50 W/channel65 W/channel
Subwoofer200 W
Amplifier frequency range20 – 20000 Hz20 – 20000 Hz
Receiver
Media format
CD/DVD
Blu-ray
CD/DVD
Blu-ray
3D
Progressive scan
DLNA
BD-Live
24p True Cinema
Parental control
Multimedia
iPod connection
 
FM tuner
Bluetooth
Wi-Fi
iPod connection
AirPlay
FM tuner
Bluetooth
Wi-Fi
Video file formats
DVD/VCD
MPEG4
H.264
AVCHD
MKV
VC-1
DivX
DVD/VCD
MPEG4
H.264
 
 
VC-1
DivX
Other file formats
MP3/WMA
Audio CD
JPEG
MP3/WMA
Audio CD
JPEG
Audio decoders
DTS
DTS-HD High Resolution
Dolby Digital
Dolby Digital Plus
Dolby TrueHD
DTS
DTS-HD High Resolution
Dolby Digital
Dolby Digital Plus
Dolby TrueHD
Connection
Outputs
linear
Dolby Digital 5.1
 
 
Dolby Digital 5.1
headphone output
HDMI1 pc
/1 output, 3 inputs/
Inputs
USB input
coaxial
linear /two pairs/
optical
LAN (RJ45)
USB input
coaxial
linear
optical /2/
LAN (RJ45)
HDMI2 pcs
General
Remote control
Magnetic shielding
Satellite body materialplastic
Subwoofer body materialMDF
Player dimensions (WxHxD)400x80x301 mm400x80x285 mm
Front speaker dimensions (HxWxD)17x10x9 cm29.9x11x8.8 cm
Rear speaker dimensions (HxWxD)17x10x9 cm29.9x11x8.8 cm
Centre channel dimensions (HxWxD)10x17x9 cm11x27.2x8.8 cm
Subwoofer dimensions (HxWxD)35x27x27 cm35.3x26.7x26.7 cm
Added to E-Catalogjanuary 2017november 2016

Front (RMS)

Rated output of one front channel of a home theater system. This paragraph indicates the power of the complete front speaker, however, it can also be used to determine the characteristics of the built-in amplifier — its rated power on a particular channel (not necessarily the front one), usually, slightly exceeds the power of the corresponding speaker.

Rated power in this case is the highest average (root mean square, RMS) sound power that the speaker is capable of delivering for an unlimited time, working without failures and overloads. Individual signal jumps can be stronger, but the power of acoustics is determined precisely by RMS.

The higher this indicator(regardless of whether we are talking about front or some other speakers) — the louder the speakers, the better they are suitable for large rooms. At the same time, in a small room, too high power may be unnecessary, because. operating the speaker at full volume will cause discomfort — despite the fact that powerful acoustics also have the appropriate dimensions, weight and price. More detailed recommendations on the optimal power of the speaker components, depending on the characteristics of the situation, can be found in special sources.

Rear (RMS)

Rated output of one home theater rear channel. For more information about the meaning of this parameter, see "Front" above.

Centre (RMS)

Rated power of one centre channel of a home theater. For more information about the meaning of this parameter, see "Front" above.

Subwoofer (RMS)

Rated power of the subwoofer supplied with the home theater. See "Front" above for details on power rating; here we note that subwoofers often have a fairly high power, because. they are designed to cover low frequencies in all audio channels.

Total power (RMS)

The total power rating of all home theater speakers, including subwoofers. The value of the rated power is described in detail in paragraph "Front" above.

Sensitivity

The sensitivity value determines the volume of the speaker system when an external signal of a certain power is applied to it. With the same signal strength and resistance (impedance), more sensitive acoustics provide greater volume.

Impedance

Home theater speaker system AC impedance. Impedance matters when connected to an amplifier: if the impedance of the speaker system is less than that of the amplifier, distortion in sound is possible, if it is higher, the acoustics may sound quieter than we would like. Naturally, in the original home theater sets, the speakers and amplifier are selected with the optimal impedance ratio, so in fact you only have to pay attention to this parameter when you need to connect acoustics to a “non-native” amplifier.

Wireless connection

The ability to connect speakers to the base via a wireless interface — most often a radio. The main advantage of this connection is the absence of connecting wires, which significantly limit the movement of the speakers and can interfere, getting confused with each other and with other wires. The disadvantages of wireless speakers are often lower sound quality than wired counterparts, as well as high cost.

Number of channels

The number of amplifier channels may be greater than the total number of speakers in the system. This allows you to equip your home theater with new speakers and expand the sound quality of the system as a whole. More specifically, you can read about the appointment of the number of channels in the “Acoustics” paragraph. And this item is especially relevant for 5.1 systems, in which the receiver is equipped with a 7.1 amplifier thanks to it.