Extending coax cable for HD DVR
I need to extend the cable supplied by Directv when they installed it, i'm moving the box to the far side of the living room. I can't find that exact cable so i purchased two 25ft lengths of RG6 750hm coax cable. I figure I can just use these two lengths parallel and attached to the directv cable using f type connecters then on to the box.
Is this the right cable to use? And I will now probably be 40 feet from the splitter, is that too far for a good HD signal?
Thanks for your help.
LG 3D 47" 47LM7600 , LG BP620 BD 3D, Denon AVR-591 A/V Reciever, Klipsch HD Theater 500, HR22-100, TiVo Premier, PS2, Wii, XBox
Samsung 46" 3D LED UN46ES7100, Samsung BD 3D BD-E5900ZA, Denon AVR2312CI, Definitive Tech supertower 8040 (pair), ProCenter 1000, ProMonitor 800 (pair), SuperCube 2000, HR21-200
Master Bedroom: Samsung UN22D5003, HR24-500
Daughters room: Samsung UN22D5003, H25-500