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Old 04-10-2014, 12:07 PM   #1
wld-kid
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Just got a 425A cab some help please

just got this cab ,with my dsl 50 head my set up should be 16 ohm on my head to 16 ohm on my cab correct ? And my cab switch on mono ? I also have. My 8412 cab stil here ,it is an 8 ohm cab ,how would I hook both up together and would I get twice the volume level ???

Brownie points for replying ASAP as I wanna plug both in and play !!
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Old 04-10-2014, 12:34 PM   #2
TheStig1214
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It's not easy to use a 8 ohm and 16 ohm cab together. The resistance doesn't add up conveniently. But yes, running one 16 ohm cab the resistance on your head should be 16 ohms. Having two cabs won't necessarily make it louder, you just get the sounds of the different types of speakers blended in the mix.
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Old 04-10-2014, 12:38 PM   #3
wld-kid
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Quote:
Originally Posted by TheStig1214
It's not easy to use a 8 ohm and 16 ohm cab together. The resistance doesn't add up conveniently. But yes, running one 16 ohm cab the resistance on your head should be 16 ohms. Having two cabs won't necessarily make it louder, you just get the sounds of the different types of speakers blended in the mix.



Cool thanks ,on the two cabs .thete is a input for 8 ohms on the 425A whilst the 4812 is just 8 ohms only so if I put the 425A at 8 ohms too then both cabs are at & ohms correct ? So how would I hook them up the head which has 16 ohm only and 2 inputs that's say 4 and 8 ohms parallel whatever that means !!?!?
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Old 04-10-2014, 12:51 PM   #4
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The 8 ohm input is for stereo. You will only be using half the speakers and you have to switch it to stereo to do that. No recommendable if you want the sound of the full cab. If you had 2 16 ohm cabs you'd plug that into the 8 ohm input or if you had 2 8 ohm cabs you'd plug that into the 4 ohm. For simplicity's sake, just run the 425A into the 16 ohm for now.
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Old 04-10-2014, 01:06 PM   #5
wld-kid
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Quote:
Originally Posted by TheStig1214
The 8 ohm input is for stereo. You will only be using half the speakers and you have to switch it to stereo to do that. No recommendable if you want the sound of the full cab. If you had 2 16 ohm cabs you'd plug that into the 8 ohm input or if you had 2 8 ohm cabs you'd plug that into the 4 ohm. For simplicity's sake, just run the 425A into the 16 ohm for now.



Ok got that ,16 ohm dsl into 16 ohm 425 and switch set to mono ....

I only have one head to cab cable anyway so I can't hook up both cabs today ,but I'm gonna buy another head to cab cable soon and try hook them up in the future or are they incompatable ?
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Old 04-10-2014, 01:23 PM   #6
TheStig1214
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There is probably a way to do it with dummy loads but that is beyond my knowledge, you could always ask again when that time comes or wait for someone more knowledgeable than me to chime in here. There are some seriously smart guys on this forum who could tell you anything you need to know.
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Old 04-10-2014, 01:56 PM   #7
wld-kid
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Quote:
Originally Posted by TheStig1214
There is probably a way to do it with dummy loads but that is beyond my knowledge, you could always ask again when that time comes or wait for someone more knowledgeable than me to chime in here. There are some seriously smart guys on this forum who could tell you anything you need to know.



Cheers , it doesn't seem to straight forward anyway , I just thought of give it a try while I have the two cabs here but if it's a load of work or hassle I wudnt bother ,it's not of grave importance I just thought it could be cool to hook mr up and let rip
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Old 04-10-2014, 02:16 PM   #8
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A 16 ohm cab in parallel with an 8 ohm cab is 5 ohms total. If you use the 4 ohm outputs on the amp it will work just fine. ie. use the two 4 & 8 ohm outputs on the back of the amp and switch it to 4.
The only problem you may have is that the power is not equally distributed between the two cabs. The 8 ohm cab will receive twice the current of the 16 ohm one and hence twice the power. What that means in reality is that the 8 ohm cab will be 3dB louder than the 16 ohm cab when run together.
If running just one cab, simply match the amp to the cab.
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