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TECHNICAL SPECIFICATIONS 
 
Transmission mode  

 

: UHF stereo 

Carrier frequency   

 

: 900MHz 

Operating voltage   

 

: Transmitter – 12 V 200 mA 
Receiver  – 2.4 V (two rechargeable 
batteries, LR03/AAA size) 

Frequency response 

 

: 30 Hz – 11 KHz 

Distortion 

  

 

 

: 1.5 – 3 % 

Signal-to-noise ratio 

 

: 50 dB 

Channel separation  

 

: 30 dB 

Range 

 

 

 

 

: 50 meters (open area) 

 
Caution:  
Changes or modifications to this unit not expressly approved by the party 
responsible for compliance could void the user’s authority to operate the 
equipment.  Operation is subject to the following two conditions: (1) this 
device may not cause interference, and (2) this device must accept any 
interference, including interference that may cause undesired operation 
of the device. 
 
 
 

Summary of Contents for HP4290

Page 1: ...HP4290 Cordless and Corded Stereo 900MHz Headphone System User s Manual ...

Page 2: ...nected directly from the headphone jack to the audio source components FEATURES 1 Auto Scanning system on headphone 2 Phase Lock Loop PLL transmission system on transmitter 3 Automatic battery recharging batteries supplied 4 900 MHz RF technology 5 RF technology leaves you completely free to move around 6 Transmission is not restricted solely to line of sight 7 Rechargeable receiver headphones 8 C...

Page 3: ...2 COMPONENT IDENTIFICATION ...

Page 4: ...to use as normal corded headset 8 Charge contacts 9 RF transmitter 10 Operating indicator light 11 Charge indicator light 12 Audio connection cable with 3 5 mm jack plug 13 Channel selector CHANNEL 3 2 1 14 DC IN connector 15 Rechargeable batteries LR03 AAA size 16 12 V 200 mA mains adapter 17 RCA socket audio adapter 18 Jack plug adapter 3 5 mm 6 3 mm diameter 19 Audio cable for use as corded hea...

Page 5: ...you have connected both the power adapter to the mains outlet AND the audio cable to a signal source If the Auto On indicator light remains off switch on the audio source and increase its output level until the red indicator light comes on RECEIVER HEADPHONES 1 Move out the earpad holder from the right hand side R of receiver headphone 2 Insert two rechargeable LR03 AAA size batteries taking care ...

Page 6: ...ss the Auto Scan button once to find a better reception channel A For better stereo reception stay approximately seven meters away from the transmitter when you press the Auto Scan button B If it is impossible to find a satisfactory frequency change the setting on your transmitter then press the Auto Scan button on the headphones to find the corresponding channel To both protect the transmitter an...

Page 7: ...em for the first time in the headphones The green indicator light will be on continuously during battery charging TO USE THE RECEIVER HEADPHONES AS A NORMAL CORDED HEADSET 1 Connect the audio cable with one end to the audio jack LINE IN of the receiver headphones and the other end to the headphone jack of the audio sound components e g Hi Fi CD player MP3 TV etc 2 Please note when the receiver hea...

Page 8: ...nitial 24 hour charge is required to guarantee an acceptable service life for the rechargeable batteries Always ensure that the headphones are switched to the Off position while the batteries are charging IMPORTANT This unit should be operated with rechargeable batteries only When replacing the batteries or when disposing of the unit always comply with applicable laws relating to the disposal of b...

Page 9: ...rgeable batteries in their housings as illustrated Check the correct polarity 2 Put back the earpad holder into the receiver headphone and make sure to align the plastic holding slots on the receiver headphones Only use rechargeable batteries of the type specified under the Technical specifications heading The rechargeable batteries supplied with the headphones must absolutely not be taken apart d...

Page 10: ...e ratio 50 dB Channel separation 30 dB Range 50 meters open area Caution Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment Operation is subject to the following two conditions 1 this device may not cause interference and 2 this device must accept any interference including interference that ...

Page 11: ...e that your TV set Hi Fi system or audio component is switched on and set to a channel that broadcasts an audio signal Use the headphones volume control to increase the sound level only when use as a wireless headphone When use as a corded headphone the headphone volume can be adjusted at the sound source eg Hi Fi or TV etc The connected audio video equipment may not be in playback mode Start play...

Page 12: ...n the headphones The headphones battery charge level may be too low Recharge the batteries or replace them with fully charged batteries Ensure that the volume knob setting is correct The headphones may be too far away from the transmitter Move closer to it The audio signal input level is too low Increase the volume from the audio source of Hi Fi CD or TV etc ...

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