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3.Technical Parameters 

Tuner Part: 

FM Frequency Range------------------------------------------------------87.5MHz-108MHz 
FM noise-limited sensitivity-----------------------------------------------------------FM≤26dB 
FM signal to noise ratio (S/N)------------------------------------------------------------≥45dB 

USB/MMC/SD Part: 

Frequency Response---------------------------------------------------100Hz-10kHz(+10dB) 
MP3 bit rates------------------------------------------------------------------------------8-320kbps 
Channel balance---------------------------------------------------------------------------≤3 dB 
Channel Separation    ------------------------------------------------------------------- ≤22dB 
MP3 Signal to noise ratio (S/N)---------------------------------------------------------≥55dB 
Working voltage -------------------------------------------------------------------------12V DC 
Real power output-------------------------------------------------------------------4x60W/14.4V 
Speaker impedance ---------------------------------------------------------------------4Ω-8Ω 
Size dimension--------------------------------------------180mm(W)x52mm(H) vx115mm(L) 
 

  4.Wiring Diagram 

 

 

 

 

 

 

 

 

 
 
 
 
 
 

 

Fault 

Reasons 

Solutions 

Summary of Contents for XM-RD275

Page 1: ...Radio memory number 1 2 3 4 5 6 5 Radio search forward Next song Answer the call 6 LCD 7 CLK Clock 8 USB slot 9 AUX Aux in 10 SD MMC slot 11 Knob Volume button Sound effect chanage 12 Radio search backward previous song Ring off 13 RST Reset 14 5 10 Last 10 songs Last folder 15 6 10 Next 10 songs next folder 16 MIC 17 Fast charge USB 18 IR Remote control receive window ...

Page 2: ...u can long press any number button 1 6 to save this radio station into this number Such you press the number 2 next time you press number 2 it will show the station directly 7 Radio search backward button In the radio mode short press this button to search the radio backward automatically and it will stop and play when it get the radio station Long press this button about three second to search th...

Page 3: ...DM is random play function 7 Insert SD MMC USB into slot short press 10 6 last 10 songs function Long press is last file function 8 Insert SD MMC USB into slot short press 10 6 next 10 songs function Long press is next folder function 16 Fast charge USB This USB slot only for cellphone charge 17 TR Change 7 color button After power on It will change one color automatically for every 3 seconds Shor...

Page 4: ...tio S N 45dB USB MMC SD Part Frequency Response 100Hz 10kHz 10dB MP3 bit rates 8 320kbps Channel balance 3 dB Channel Separation 22dB MP3 Signal to noise ratio S N 55dB Working voltage 12V DC Real power output 4x60W 14 4V Speaker impedance 4Ω 8Ω Size dimension 180mm W x52mm H vx115mm L 4 Wiring Diagram Fault Reasons Solutions ...

Page 5: ...g with corresponding format 4 SD MMC card U disk golden finger is dirt which causes bad contact Connect the power wire Connect speaker wire Check the contents of SD MMC card U disk Clean with absolute alcohol Low sound not clear 1 Power internal resistance is high 2 Antenna is bad contact Replace the power supply Tighten the antenna plug Mono track 1 One channel of speaker wire is open circuit 2 A...

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