How to wire Hifonics Hfi1500d mono w/ dual terminals

[biabia87 10+ year member]

I have a Hifonics Hfi1500d mono amp w/ 2 Alpine type R's 2ohm and Im trying to wire both at 1ohm each so I can get the max outta my amp...my amp has dual terminals (2 negative's and 2 positive's)...If I wire each sub individually at 1ohm w/ the jumpers that are included, will I get the full 1ohm output from my amp if I use both negative and positive terminals on my amp for each sub?....The reason I ask is because on my amps manual it says that if I use all my terminals meaning both positive and negative, I will get a 2ohm output each minimum from my amp...Thanks for the responses Im not sure if Im doing this right!

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[Kangaroux 5,000+ posts]

Are those dual 2 ohm? You won't get a 1 ohm impedance with 2 dual 2 ohm subs. You can either do a 2 ohm load, or a .5

 

[Epic0318 10+ year member]

yup messed up on the subs there. your only real option is running at 2 ohms and underpowering your subs because at .5 ohms youll just fry that amp

 

[biabia87 10+ year member]

And I agree however my subs owners manual says when I wire 1 sub I can get 1ohm impedance by using the jumpers...would this not work because of the fact that I have 2 subs even though Im wiring each seperately?

 

[Epic0318 10+ year member]

your not wiring each sub separately. it doesnt have to channels. its like that supposedly to make wiring easier. but youll end up getting .5 ohms

 

[Kangaroux 5,000+ posts]

^ this. When you wire up subs to the amp like that all it's doing is taking those connections and wiring them up in parallel internally.

 

[Kangaroux 5,000+ posts]

^ this. When you wire up subs to the amp like that all it's doing is taking those connections and wiring them up in parallel internally.

 

[biabia87 10+ year member]

Gotcha! so I gotta wire all subs together internally, but they would need to be 4 ohm right to get that 1ohm impedance......and just use one pair of negative's and positives on ma amp?

 

[Epic0318 10+ year member]

double post.

this is how you need to wire them http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/2DVC_2-ohm_mono.jpg

if they were dual 4 this is how you would wire them http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/2-DVC-4-ohm-mono-low-imp.jpg

 

---------- Post added at 01:48 AM ---------- Previous post was at 01:47 AM ----------

 

and yes you would only use 1 negative and 1 positive