Additional Images
Key Features
| Elegant design, made with a highly durable aluminium housing |
| 50W x 2 full digital amplifier for exceptional sound quality. |
| USB Direct Digital Connection for iPhone/iPod |
| High-quality sound reproduction of iPod/iPhone music |
| PC Audio Streaming via back-side USB |
R-K731-B
Key Features
| Full digital high power amplifier, 50W + 50W |
| High-quality sound reproduction of iPod/iPhone music |
| USB Host (MP3/WMA/AAC Playback) |
| Rigid full metal body, solid stylish construction. |
| PC connection (USB B)for audio streaming |
General Features
| Supreme EX | Yes, (CD, D-IN, USB, PC IN) |
| Tone Control | Yes, Bass, Mid & Treble |
| D-Bass | Yes (0~10) |
| Remote Control | 43-key Standard Remote |
Tuner Features
| Tuner (AM/FM) | Yes |
| Radio Data System | Yes |
| Program Type (PTY) | Yes |
| Number of Presets (DAB) | 40 |
Storage Features
| USB-A Terminal (USB Host) | Yes |
| USB Decoding Format | MP3/WMA/AAC |
HE_ iPod_Dock_Feat
| iPod/iPhone Connection | iPod digital connection through USB with charge function |
| Supported iPod/iPhone models | (as of October 2011) iPod Classic, iPod nano (2nd -6th gen.), iPod touch (1st - 4th gen.), iPhone, iPhone 3G, iPhone 3GS, iPhone 4, iPhone 4S |
| iPod/iPhone Control Functions | Play/Pause, Skip for-/backwards, Fast for-/backwards, Album next/back, Repeat function, Random access. |
CD Features
| CD DA / CD-R/RW | Yes |
| MP3 | Yes |
| WMA | Yes |
| AAC | Yes |
| CD Text | Yes |
| Tag information | Yes |
| Program Playback | Yes |
| Repeat Playback | Track, Program, All |
| Random Playback | Yes |
Digital Inputs/Outputs
| USB-A Terminal (USB Host) | Yes |
| USB-B Terminal (for streaming audio from PC) | Yes |
| iPod Connection | Yes, Digital connection through USB port in front |
| Optical Audio Input/Output | 2 / - |
Analogue Inputs/Outputs
| RCA Audio/Video Inputs | 1 Audio |
| RCA Audio/Video Outputs | 1 Audio (Recording Output) |
| Subwoofer Output | Yes |
| Screw-type Speaker Terminals | Yes |
| Headphone Jack (3.5 mm) | Yes |
| D.A.P. Link Terminal | D.Audio-connection analogue 3.5 mm |
| 75 Ohm FM Antenna Connector | Yes |
| AM Antenna Connector | Yes |
Amplifier Features
| Maximum Stereo Output Power | 2 x 50 Watt |
| Digital Amplifier | Yes |
| Digital Pre Amplifier | Yes |
Audio Specifications
| Rated Output Power | 2 x 50 Watt (1kHz, THD 10%, 6Ω) |
| Bass | Yes, ±8dB (at 100 Hz) |
| Mid | Yes, ±8dB (at 1 kHz) |
| Treble | Yes, ±8dB (at 10 kHz) |
| Input Sensitivity/Impedance: Line (AUX) | 300mV / 47kΩ |
| Input Sensitivity/Impedance: Line (D.Audio) | 300mV / 47kΩ |
| Output Level/Impedance: Subwoofer Pre-Out | 2V / 10kΩ |
| Output Level/Impedance REC OUT | 2000mV / 10kΩ |
Tuner Specifications
| FM Tuning Frequency Range | 87.5 ~ 108MHz |
| Antenna Impedance | 75 Ω unbalanced |
| AM Tuning Frequency Range | 531 ~ 1602kHz |
USB Specifications
| Format | USB Host (Playback) |
| USB Standard | 1.1 / 2.0 |
| Usable USB devices | USB mass storage class devices |
| USB Interface | USB 2.0 (Full speed), USB 1.1 compatible |
| MP3 Sampling Frequency (Stereo) | 32/44.1/48kHz |
| MP3 Bitrate (CBR/VBR) | 32 kbps to 320 kbps |
| WMA Sampling Frequency (Stereo) | 32/44.1/48kHz |
| WMA Bitrate (CBR/VBR) | 32 kbps to 320 kbps |
| WAV Sampling Frequency | 32/44.1/48kHz |
| WAV Bit count | 8/16 bit |
| ID3 tag | Version 1.0/1.1/2.2/2.3/2.4 compatible |
| Maximum Folders | 255 |
| Maximum Files | 999 |
| Maximum Current Supply | 1A |
| File System | FAT 16 / 32 |
| Decoding format/type AAC (created using iTunes 4.1 to 10.4) | Sampling frequency: 32/44.1/48kHz Bit rate: 32kbps to 320kbps |
| WMA Decoding | Windows Media Audio 9 Compliant |
| Maximum number of displayable characters | File names:64 (including file extension) Tag display: ID3 TAG Ver.1.0,1.1->30 Ver.2.2,2.3,2.4->64 |
Digital Input/Output Specifications
| Sampling Frequencies | 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz |
| Optical Digital Input Terminals | Sensitivity -15 dBm - -24 dBm Wave length 660 nm ±30 nm |
| Supreme EX (CD, D-IN, USB, PC IN) Playable frequencies | 1 Hz - 48 kHz |
CD Player Specifications
| Type | Semiconductor laser |
| Supporting Disc Format | ISO 9660 Level 1/2 Joliet, Romeo |
| Decoding format/type AAC (created using iTunes 4.1 to 10.4) | Sampling frequency: 32/44.1/48kHz Bit rate: 32kbps to 320kbps |
| MP3 Sampling Frequency (Stereo) | 32/44.1/48kHz |
| MP3 Bitrate (CBR/VBR) | 32 kbps to 320 kbps |
| WMA Decoding | Windows Media Audio 9 Compliant |
| WMA Sampling Frequency (Stereo) | 32/44.1/48kHz |
| WMA Bitrate (CBR/VBR) | 32 kbps to 320 kbps |
| MP3/WMA Maximum Folders | 255 |
| MP3/WMA Maximum Files | 999 |
| ID3 tag | Yes, , versions 1.0/ 1.1/ 2.2/ 2.3/ 2.4 |
| Maximum number of displayable characters | File names:64 (including file extension) Tag display: ID3 TAG Ver.1.0,1.1->30 Ver.2.2,2.3,2.4->64 |
General Specifications
| Display Type | Dot Matrix |
Power Specifications
| Power Consumption | 65 Watt |
| Stand-by Power Consumption (less than) | 0.5 Watt |
Dimensions & Weight
| Dimensions (WxHxD) | 245 x 104 x 309 mm |
| Weight (Net) | 5.7kg |
LS-K731-B
Key Features
| New developed dome tweeter for wide range, up to 65 kHz playback |
| 2-way 2 Speaker System |
| Aluminum speaker frames |
| High Quality Crossover Network Circuit |
| Screw type, bananaplug compatible terminals |
Speakers
| Type | Bookshelf |
| Configuration | 2-way Speaker System |
| Screw-type Terminals (banana plug compatible) | Yes |
| Gold Plated Terminals | Yes |
| Magnetically Shielded | Yes |
| Grill | Detachable |
Speaker Specifications
| Peak Input Power | 80 Watt |
| Frequency Response | 50Hz ~ 65kHz |
| Crossover Frequency | 13000Hz |
| Impedance | 6Ω |
| Sensitivity | 83dB/W at 1m |
| Tweeter | 20 mm (3/4") Dome type |
| Woofer | 110 mm (4-1/2") Cone type |
Dimensions & Weight
| Dimensions Speaker (WxHxD) | 147 x 252 x 244 mm |
| Weight Speaker (Net) | 3.5kg per piece |