#1
Thought this would be the best place to ask, i have Thomann PM400 poer mixer and a set of Prosound 300w passive speakers and i just ant get them to talk to each other, please help.

The mixer
the back of mixer
speakers
back of speakers

I also have two 10m stagg speaker cables. Please help :S
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#2
Are your speakers 4 ohms? They need to match your power amp.

You can try running it from one output from the power amp and then linking the speakers through that second jack. They should work in stereo using both of the amps output jacks regardless of ohms...it'll just be bad for it(if the ohms don't match).

So are you saying that when you have everything hooked up, you don't get any sound?
Last edited by ethan_hanus at Jul 8, 2011,
#3
theyre 8, thought it didnt matter as its a solid state mixer? Nothig is soming out of the speakers at all, not even hum
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#4
Well, a amp that runs at 4 ohms running into a speaker at 8 ohms is not good for it, it can put stress on the output chips, and damage them. It usually just cuts your volume in half.

If you're not getting anything, you might check your power amp, it may have blow the output chips. To check this, you can take any guitar amp that runs at 8 ohms, and connect it to the PA speaker, and see if it's not the speakers that are blown. If the speakers are not blown, you have to assume your amp is blown.
#5
whoops. hasty advice is hasty.
Prs se Holcomb is the answer
Last edited by AcousticMirror at Jul 8, 2011,
#6
So i need another piece of equipment?!
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#8
So I basically have 2 8ohm passive speakers and i have a power mixer running at 150watts max at 4ohms, are these imbalanced? Also, i do not understand why each speaker has 4 holes, 2chrome 1/4" and 2 gold mini-jack. Does anybody know why?
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#9
well there's no reason why it's not working.

speaker out on the pa mixer goes to speaker in on the speaker.

if it's not working then something is broked.

those are just different connection methods.

you have 2 rca's and 2 banana's.

each set is in series I'd think so you can daisy chain cabs.


if you have 2 8 ohm cabs and you plug them each into the mixer that should give you 4ohms in parallel.
Prs se Holcomb is the answer
Last edited by AcousticMirror at Jul 8, 2011,
#10
I have my 120 watt Bugera but i don't really want to mess with that unless im CERTAIN thatI know what im doing
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#11
Quote by ProphetToJables
So I basically have 2 8ohm passive speakers and i have a power mixer running at 150watts max at 4ohms, are these imbalanced? Also, i do not understand why each speaker has 4 holes, 2chrome 1/4" and 2 gold mini-jack. Does anybody know why?



The two 1/4 jacks are for linking the speaker. The jack on the left is the input jack, and the jack on the right is the output jack, or you can flip them, and it allows you to connect more than one speaker.

The gold jacks are just a different type of connection for the exact same thing.

Your speakers and power amp are imbalanced.

^AM, it should, I've seen some PA amps that wont reduce it to 4 ohms in parallel.

Also, use the bulgera, even if the ohms don't match, it wont hurt it to have it connected to the speaker less than a minutes just to check if sound will come out.
Last edited by ethan_hanus at Jul 8, 2011,
#12
How do I balance them?
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#14
Checked the spakers through Bugera, they work. In the back of the manual itsays "max. power output @8 ohms 100W RMS" and the RMS on each amp is 150w (and 300 prog?)

OH! It also says Mono speaker outputs: Two 14" jack'd for conencting one or two 8 Ohm speaker cabinets
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#15
Ok, so you should be good, it automatically adjusts the ohms of the output. But you'll only have a max of 100 watts RMS coming from your PA amp, instead of 150 watts at 4 ohms.

So if you are connecting everything correctly, and the speakers work, and you're not getting any sound, the only conclusion is that your PA amp is toast.

You can double check the PA amp by taking the amp out of the case, and checking the output chips to see if there is any burning around them. If there is it means they overheated and burned up.

Yours should look similar to mine, but it's those black chips attached to that large silver heat sink. If they look discolored or the paste around them looks brownish, then you can confirm the chips burned up. You can replace them, or just buy a new amp.

#16
We did hear a pop early on... could that have been it? How much is it to fix? I can't handle having to send it back to Germany
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#17
I checked the prices on those amps, and they are rather cheap. Less than a 100 euros. The pop may of been a blown fuse, or a blow output chip. I'd still pull the amp out and check everything is in good order.

If you know how to solder, you can replace the chips yourself if they have burned up. But it's difficult to find the correct chips.

It might be more time effective to just order a new amp.
#18
I've spent all my money on getting this amp, so posting it back to Germany is going to be hard...
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#20
Won't I have to pay for shipping?
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#22
i'll send them an email, thanks for all your help
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic
#24
Just one last thing: will opening it up to check anything void the warranty?
Gear:

Gibson 2005 Les Paul Standard
Fender Road Worn Strat w/ Noiseless pickups
Marshall JCM 2000 401C
Marshall Vintage Modern 2266
Marshall 1960A cab (Dave Hill from Slade's old cab)
Ibanez TS9DX
EHX Little Big Muff
Freshman Acoustic