Any chance my amp is 1 ohm stable?

[razaice]

I've got a directed 250d. Anyone think this might be 1 ohm stable? Does it have some kind of protection to save itself in case it can't handle it?

Click to read more...

 

[perfecxionX 10+ year member]

you could probably buy a used amp that will run 500@1 for less than 50 bucks, just go buy an amp that was actually built to do what you want it to do

 

[razaice]

Thanks I didn't know that. I got this amp for $30 a while ago, so I thought it might be worth a try.

 

[k_schutte 10+ year member]

Assuming you're running a pair of D4 coiled subs... doubt the amp ever really sees 1ohm. Mine measure 2.6 at the amp and doing a 20hz-80hz sweep, never got below 2ohm IIRC...

 

[razaice]

Assuming you're running a pair of D4 coiled subs... doubt the amp ever really sees 1ohm. Mine measure 2.6 at the amp and doing a 20hz-80hz sweep, never got below 2ohm IIRC...

I actually have three 4 ohm svc subs. But do you think they wouldn't drop to 1 ohm either?

 

[tommydh 10+ year member]

I actually have three 4 ohm svc subs. But do you think they wouldn't drop to 1 ohm either?

In theory and through Calculations it would be a 1.333 Ohm load.

 

[tommydh 10+ year member]

That amp is 2 ohm stable

Directed 250d Class D Mono Amplifier

 

[razaice]

That amp is 2 ohm stableDirected 250d Class D Mono Amplifier

Thanks. Yeah I know it's advertised as 2 ohm stable, but if I understand right, you can sometimes run amps lower than advertised and they're stable. I think it depends on the quality of the amp though.

 

[k_schutte 10+ year member]

Amp quality amd electrical play a big part. I don't think I've ever seem a sub meter exactly what its claimed to be.my "S6" sub meters 5.3, my "Q.25" sub measured like .38 or so... I'd say you'd be fine but its your amp. Wire them up in your box amd see what ya got

 

[tommydh 10+ year member]

If you want to chance it it was a $30 amp. I have always tried to stick within the ratings on my amps since Ive generally bought new or amps I didnt want to purchase trwice. Not saying it cant Im just saying I wouldnt.However you could run two of the subs series wired and one paralled that would bring your load up.

 

[tommydh 10+ year member]

Amp quality amd electrical play a big part. I don't think I've ever seem a sub meter exactly what its claimed to be.my "S6" sub meters 5.3, my "Q.25" sub measured like .38 or so... I'd say you'd be fine but its your amp. Wire them up in your box amd see what ya got

I doint know what meter you are using or wire but I have all Fluke meters and I just tested 2 d4 subs from sundown a pioneer dvc 4 polk subs and 5 kicker paper weights Each coil was within .1 of the nameplate rating. Now if your connections arent quite right or wire too small that will add to the resistance. But I measured each coil then paralled and series then read and each time I was dewad on what I should have read except for the 2 that were bad. The tensile leads were off the sub so no reqading but if your 4 Ohm swvc doesnt read 4 ohm somethings wrong.

 

[BrownVanMan 10+ year member]

Those older directed amps are pretty decent. I have the 250d as well. I would just tune the amp to the 250 at 2 and run if guess with rise and all you'll be real close to 2

 

[k_schutte 10+ year member]

I doint know what meter you are using or wire but I have all Fluke meters and I just tested 2 d4 subs from sundown a pioneer dvc 4 polk subs and 5 kicker paper weights Each coil was within .1 of the nameplate rating. Now if your connections arent quite right or wire too small that will add to the resistance. But I measured each coil then paralled and series then read and each time I was dewad on what I should have read except for the 2 that were bad. The tensile leads were off the sub so no reqading but if your 4 Ohm swvc doesnt read 4 ohm somethings wrong.

Fluke 115... the D4's are RE se-x's, Q.25's was an APXX18, the S6 is an orphan. I use 10/8 gauge OFC wire for the subs...

 

[razaice]

Would there be some kind of protection in case the amp can't handle it, or would it just break?

 

[NIHL8ION]

You only spent $30 on that amp, NOT a big loss if it does sh1t the bed, but I doubt you will have any issues, I've ran my Orion CO3002 (Made by Directed) @ 1 ohm bridged for months on end without fail (it's rated at min. 4 ohm bridged) - YES it did get pretty hot, but I made sure it was getting adequate ventilation & it never shut down on me 1 time... I still have this amp and it still works without problems and this isn't even a class D !!!