Splawn Impendence question

[hammered]

They say there are no dumb questions . My Splawn SS head has two speaker outs and I want to run two separate 8 ohm 1x12 cabs. Is it as simple as plugging in both cabs , setting the impendence selector to 8 ohms and I'm good to go ? I was just confused as to what impendence I need to have the amp at 8 or 16 since It'll be two separate cabs . Thanks

 

[paulyc]

4 ohms
The amp's speaker jacks are wired in parallel so you half the Ohm load, so two 8s become 4, like if you ran 2 16 ohm cabs it would be 8.

 

[hammered]

4 ohms
The amp's speaker jacks are wired in parallel so you half the Ohm load, so two 8s become 4, like if you ran 2 16 ohm cabs it would be 8.

Cool thanks

 

[PDC]

I have read more online explanations and watched more videos addressing ohmage calculation than I can count and it still makes literally zero sense to me.

 

[godgrinder]

^ It’s just high school physics.

 

[hammered]

The amp has a 16/8 ohm selector . Would something like this work to go into two 8ohm cabs ?

https://www.radialeng.com/wp-content/up ... al-web.pdf

 

[paulyc]

Looks like it.

 

[Luca79]

The amp has a 16/8 ohm selector

If want use 2 cabs, you need 16 Ω cabs and set it to 8 Ω.

Not seen the link... Probably that work too. Interesting tool.

 

[PDC]

^ It’s just high school physics.

Help me out - amp set at 16 ohms. 2 separate 8 ohm enclosure (1x12 cabs with an 8 ohm speaker in each). Intuition tells me that a pair of 8 ohm loads equals 16 ohms. That goes along with what was said earlier in the thread that the pair of (in the example) 8 ohm loads will ‘half’ the load on the amp.

But of course, the correct answer is amp must be set to 4 ohms. I know the right answer. I’ve read and memorized the right answer for the most common 2 speaker combinations. Ive just never been able to conceptualize why the right answer is, in fact, right.

 

[LP Freak]

^ It’s just high school physics.

Help me out - amp set at 16 ohms. 2 separate 8 ohm enclosure (1x12 cabs with an 8 ohm speaker in each). Intuition tells me that a pair of 8 ohm loads equals 16 ohms. That goes along with what was said earlier in the thread that the pair of (in the example) 8 ohm loads will ‘half’ the load on the amp.

But of course, the correct answer is amp must be set to 4 ohms. I know the right answer. I’ve read and memorized the right answer for the most common 2 speaker combinations. Ive just never been able to conceptualize why the right answer is, in fact, right.

When you run both 8ohm cabinets separately to the amp it sees a 4 ohm parallel load. If those same cabinets have an in and out you can jumper the two cabinets and send a series 8 ohm load to the amp.

 

[311splawndude]

^ It’s just high school physics.

Help me out - amp set at 16 ohms. 2 separate 8 ohm enclosure (1x12 cabs with an 8 ohm speaker in each). Intuition tells me that a pair of 8 ohm loads equals 16 ohms. That goes along with what was said earlier in the thread that the pair of (in the example) 8 ohm loads will ‘half’ the load on the amp.

But of course, the correct answer is amp must be set to 4 ohms. I know the right answer. I’ve read and memorized the right answer for the most common 2 speaker combinations. Ive just never been able to conceptualize why the right answer is, in fact, right.

When you run both 8ohm cabinets separately to the amp it sees a 4 ohm parallel load. If those same cabinets have an in and out you can jumper the two cabinets and send a series 8 ohm load to the amp.

^This

That and the Splawn trannys can handle one way mismatches but I didn't say that.

What speaker cabs do you have exactly Hammered and what options do they give you? And is this for a stereo application or are you just spreading the sound out? Can't speak to the Radial deal.

 

[hammered]

^ It’s just high school physics.

Help me out - amp set at 16 ohms. 2 separate 8 ohm enclosure (1x12 cabs with an 8 ohm speaker in each). Intuition tells me that a pair of 8 ohm loads equals 16 ohms. That goes along with what was said earlier in the thread that the pair of (in the example) 8 ohm loads will ‘half’ the load on the amp.

But of course, the correct answer is amp must be set to 4 ohms. I know the right answer. I’ve read and memorized the right answer for the most common 2 speaker combinations. Ive just never been able to conceptualize why the right answer is, in fact, right.

When you run both 8ohm cabinets separately to the amp it sees a 4 ohm parallel load. If those same cabinets have an in and out you can jumper the two cabinets and send a series 8 ohm load to the amp.

^This

That and the Splawn trannys can handle one way mismatches but I didn't say that.

What speaker cabs do you have exactly Hammered and what options do they give you? And is this for a stereo application or are you just spreading the sound out? Can't speak to the Radial deal.

Well I don’t have the badass 4x12 in my avatar anymore LOL . I’ve got a little budget 1x12 cab with just one input , it sounds surprisingly good so I thought about getting another and running both

 

[SFW]

Ohms are not that complicated. As stated above, your two 8ohm cabs will be seen as 4ohms by your amp.

4 Ohms x 2= 2 Ohms
8 Ohms x 2= 4 Ohms
16 Ohms x 2= 8 Ohms

They really tricky part is if you have two cabs with different impedance loads. i.e. one 16ohm cab and one 8ohm cab. Then you round the 16 to 8 and set your amp for 4ohms. It's still a mismatch, but it will work. If your amp cannot handle a 4 ohm load- then don't connect both cabs. It is not safe for your amp.

 

[311splawndude]

4 Ohms x 2= 2 Ohms
8 Ohms x 2= 4 Ohms
16 Ohms x 2= 8 Ohms

Except in series wiring. Then it is cumulative,

 

[hammered]

Thanks for all the help guys

 

[Racerxrated]

Always lower number out from the amp to a higher ohm number on the cab; this will always work. If you go opposite ie higher number output on the amp to a lower ohm number on the cab you risk your transformers. Best to match up numbers but low-high(amp-cab) works fine. Some mismatch on purpose this way for a different tonal response.

 

[BackCrack]

No need to spend $80 on that Radial cab thing. Just make yourself a series speaker cable and set the amp to 16 ohms.

 

[hammered]

No need to spend $80 on that Radial cab thing. Just make yourself a series speaker cable and set the amp to 16 ohms.

That has my interest. How would I go about that and would I need 2 separate series cables ?

 

[BackCrack]

Make it just like you would a parallel Y-cable, except inside the plug for the amp, connect the (+) lead of one cable to the (-) lead of the other cable. Isolate that connection with a couple layers of shrinkwrap. Done.

 

[panhead]

Always lower number out from the amp to a higher ohm number on the cab; this will always work. If you go opposite ie higher number output on the amp to a lower ohm number on the cab you risk your transformers. Best to match up numbers but low-high(amp-cab) works fine. Some mismatch on purpose this way for a different tonal response.

I know that everyone I have known since late 70`s says this but Soldano and Germino say the opposite