Higher Effiency vs Lower Ohm Load

[Blackout67]

I've just learned over the years, it's less cost up front to go less expensive, it's always expensive to go cheap. I have a Soundigital EVOPS 2400.1 2 ohm model that gets 1590 watts at 4 ohms, 2400.1 at 1 for two 33v2's that have a combined RMS rating of 800. watts. Plenty of wiggle room, efficient operation, better control (damping) and smaller footprint than the Hooligan HKO 3000 that it replaced. I ran that at 4 ohms too, just cooler, and they don't work as hard and are at peak efficiency.

It's kind of like a winch. If you have a 2500 lb boat, if you can, are you not better off using a 5000 pound capacity winch? The minimum will get you there but for how long?

Excess power is crazy cheap these days, even decent crazy power!

Yup. The amp will it only have less load cause you're not pushing it to the limits, but will also be cooler and more efficient furthering the longevity even more.

It's like buying aftermarket O2 sensors. Sure they are half the price of the OEMs but don't last as long or perform as good so you end up spending more in the long run replacing the shitty aftermarket ones

 

[spokey9 5,000+ posts]

Price doesn't always mean quality

 

[1aespinoza Premium Member]

Price doesn't always mean quality

On the expensive side this is true. On the economy side it is pretty much expected. A 5000 watts amp for $179.99.... You know the quality without even looking at the specifications.

 

[spokey9 5,000+ posts]

On the expensive side this is true. On the economy side it is pretty much expected. A 5000 watts amp for $179.99.... You know the quality without even looking at the specifications.

There's solid 1k amps in the $170-200. It's more about knowing what you're looking at and not what a price tag says...and anyone thinking they're getting a legit 5k for $180 new really needs to some learning

 

[Doxquzme Premium Member]

5000 WATTS MAX POWER! (and seafront property n Idaho for cheap!)

 

[Blackout67]

There's solid 1k amps in the $170-200. It's more about knowing what you're looking at and not what a price tag says...and anyone thinking they're getting a legit 5k for $180 new really needs to some learning

Sure it went up in flames after 3 seconds of holding the signal but that glorious 3 seconds of 5,000 watts with 20% THD was all I needed

 

[Blackout67]

Wouldn't it be much more lucrative to just pony up a little for better components to make it put out more power more efficiently at 2 ohm and market it as a premium product? I mean people will already empty their entire wallet for anything their favorite brands name on it *cough* JL. Even if that product is massively surpassed by a product that is half the price.

 

[metalheadjoe 10+ year member]

Also you gotta figure in box rise so how often would subs wired to 1 ohm actually show 1 ohm to the amp.

Show me the formula for "box rise".

Impedance also rises as the VC heats up. While I'm glad to see amp tests, etc, the information needs to be put in proper perspective to be really useful.

Impedance is a combination of resistance and inductive reactance.

 

[Blackout67]

Show me the formula for "box rise".

Impedance is a combination of resistance and inductive reactance.

Isn't box rise a misinterpretation of excursion impedance rise? Correct me if I'm wrong here but excursion and frequency are mostly what determines the dynamic impedance of a driver and what people are seeing as "box rise" is just the extra excursion form the subwoofer being In a much larger box?

 

[Jimi77 Premium Member]

Probably not so much. I'm not sure of the equation of the energy is lost as heat from the transfer of energy, but if I had to guess it'd be 50-75 per percent less heat (could be talking out of my ***)

But definitely when you get into larger numbers those efficiency percentages are even crazier. I couldn't imagine what kind of efficiency these guys running .5 or god forbid even .33 ohms are getting while clamping 5k+ watts

Are they really clamping 5kw? Typically alot of those crazy spl systems are doing burps at system resonance, which will coincide with peak impedance.

 

[Blackout67]

Are they really clamping 5kw? Typically alot of those crazy spl systems are doing burps at system resonance, which will coincide with peak impedance.

I guess clamping was the wrong term to use. But I definitely see people running 3-5k on sub 1 ohm loads for their daily. People with too much money and nothing to spend it on

 

[1aespinoza Premium Member]

5000 WATTS MAX POWER! (and seafront property n Idaho for cheap!)

I'll take it if you throw the Golden Gate in free!

 

[Jimi77 Premium Member]

Show me the formula for "box rise".

Impedance is a combination of resistance and inductive reactance.

Any number enclosure calculators can give you the impedance curve with the enclosure.

I understand what impedance is; I repaired military radar system for the USMC.

 

[metalheadjoe 10+ year member]

Any number enclosure calculators can give you the impedance curve with the enclosure.

I understand what impedance is; I repaired military radar system for the USMC.

Obviously you don't if you think a box can change it. Our radar repair guys were idiots, so maybe keep that to yourself if you want to impress people.

 

[Jimi77 Premium Member]

Obviously you don't if you think a box can change it. Our radar repair guys were idiots, so maybe keep that to yourself if you want to impress people.

So you're unaware that a subwoofer's impedance changes in an enclosure? Okay.

I thought this was common knowledge. For example, tuning a ported enclosure introduces a spike in the impedance curve, which is why one can make a sub handle 3,4,5x "rated power" for burps. This is why subs can handle 2x what they might handle in sealed enclosure when placed in a peaky ported enclosure. Is it just me? Isn't this common knowledge for the old heads on here???