DMX vs Microphone XLR Cables

Digital 1 DJ's forum for the PCDJ DMX intelligent lighting control software.

Moderator: online4u

DMX vs Microphone XLR Cables

Postby midnightmike » Fri May 22, 2009 5:44 pm

Will Microphone cables make Lights work Eratic? What i understand is that they are the same cables, Except they are wired different at the Pins. Is that right? Are the cables labled DMX? Have to ask questions.
Posts: 227
Joined: Wed Aug 31, 2005 2:39 pm

Postby xavier25 » Fri May 22, 2009 6:00 pm

I mix both of them on my rig. DMX and Speaker cables at the same time and never notice any problems. #1 15.4"ASUS G1SN-A1 Vista 32Bit Home Pre SP1 Intel core 2 Duo CPU T8100 2.10GHZ,4GB Ram,NVIDIA GeForce 9500M GS 512MB,320GB #2 15.4" Sony VAIO VGN-N150P XP Pro SP2 Intel Duo T2050 1.60GHZ,1GB Ram,945GM Chipset 128MB,100GB PCDJ:RED,FX,DMX,DEX,REFLEX,VJ And DENON 2500,2-4500,5500,2-x500
User avatar
Regarded Member
Posts: 625
Joined: Thu Oct 13, 2005 4:21 pm
Location: LI,NY

Postby cmbmusic » Fri May 22, 2009 6:08 pm

Sometimes mic cables used in a dmx setting can cause problems. It is recommended that you use dmx cables for dmx applications and have a signal terminator on your last fixture in the chain.
Casey Brown
Tyler, Texas
User avatar
PCDJ Aficionado
Posts: 1210
Joined: Thu Oct 05, 2006 8:47 pm
Location: Tyler, Texas

Postby Alan Wood » Tue May 26, 2009 3:55 pm

Casey is correct,

Microphone cable has a characteristic impedance of approximately 600 Ohms, DMX has an impedance of 120 Ohm, they are not the same. Microphones are low-frequency analogue signals and DMX are hi-frequency digital RS-485 (now EIA-485) signals.

Microphone cables will work most of the time on small systems but using them is NOT recommended and can lead to trouble with signal reflections (Erratic behaviour). DMX should use a cable such as Belden 8102 or 43906.
Karaoki Developer.
User avatar
Alan Wood
PCDJ Aficionado
Posts: 1165
Joined: Tue Jul 15, 2003 8:11 am
Location: UK

Return to PCDJ DMX

Who is online

Users browsing this forum: No registered users and 2 guests