markk

iTrader: (2)

any one who can give me some advice about sound systems, , im using some 4ohm subs that have a high pass output on them, if i connect another 4ohm speaker to that will that affect the ohms rating back to my amp ? and if so in what way ?

the lowest ohms my amp can take is 4ohms, so i dont want to go blowing it up with the wrong speaker combo

what if i used an 8 ohm speaker on the top off the subs, does the ohms drop or increase ?
and then what happens to the wattage out put on my amp if i change the speaker ressitance ?

the spec of the gear is 250wrms subs, 300wrms tops and a 600wrms per side amplifier if thats of any use.

cheers

Thrush

iTrader: (1)

I hate impedance - cos I dont' understand it

Stu.H

4ohm + 4ohm connected together ie + to + and - to - (parallel) will drop the ohms to 2, and double the output from the amplifier.

If your amplifier doesnt state 2ohm stable, DONT do it as it will fry your amp VERY quickly.

If you wire the 4ohm + to the - of the other speaker, and the - to the + (series) respectively, it will double the ohmage, therefore the amplifier will see 8 ohm and halve the output.

IF its a 4ohm amplifier (bit wierd if house amp as they are usually 8ohm) then you will need 3 4ohm subs to be wired in series and then back to parallel to get the 4ohms and 3 speakers off each channel.

Probably doesnt make sense, but I'm sure someone will explain better!!

cjwood555

What speakers/amp are they? Stu is sort of right, but the crossover affects things too. Also, the speaker impedance is only nominal and can drop to almost 0 at the tuned frequency so basically, you could be lucky, or you could not be lol

Does your amp support bridge mode at 4ohms? If so you could wire each half in parallel and the two halves in series, if that makes sense? If it does not support bridge mode at 4-ohms, you have three options:

- Wire as above and run in mono on half the amp.
- Wire tops/subs in series (will require you making up a serial splitter) and run in stereo
- Get another amp

Chris

markk

iTrader: (2)

the amp is a powered desk and the subs are peaveys,

i dont think it supports bridged mono output, its a soundlab mp12 ive no instructions for it, and all it has is two speakons out the back saying 4 ohms.

DazC

iTrader: (1)

Mark, parrallel will decrease impedance/resistance and series will increase impedance/resistance!

markk

iTrader: (2)

sound systems do have slight differances to straight ressitance daz, i have the option to bi-amp my subs also, whats that all about then ted
speaker coils can be abit funny

im just trying to make the best use from an amp system as we already blew a 1k yamaha unit last week

DazC

iTrader: (1)

I still found that rule applied when I was wiring up my dual coil sub to be honest. There is still a chance I may be wrong though.