Did a CA.com bro just go on a shooting spree? (Srs)

[hispls 5,000+ posts]

At a higher voltage, efficiency is better and there is less heat was my understanding. I'm not sure if it has anything to do with running lower impedances. Inadequate electrical regardless of impedance is bad. There's no way to know how bad the previous owner treated the amp.
I bought my amp last year, so hopefully I'm safe. It was one of the last amps from the last TFE 8.0 batch, and I haven't heard of parts failing on them (yet).

Refurbs scare me for some reason. I can't help thinking that there are one of two other issues:

1. Other components were damaged/stressed when the amp failed, but weren't replaced because they were still functional.

2. The flaw that caused the first failure could happen again if the underlying issue was not addressed. Like say a capacitor wasn't in spec for the error in tolerance, and because of that another problem was caused. If the refurb company didn't know that was the issue, they might just replace the damaged components thinking it was user error. The amp might test good after the repair, but break after prolonged use. Just using a random example

High IMPEDANCE is more efficient and less heat. Halving impedance = quadrupling heat input voltage has nothing to do with that.

Of course, under-built, unregulated power supplies are susceptible to failing with inadequate electrical, but that's a different thing entirely.

A LEGIT repair shop will be able to tell what has failed and what needs replacing after any given type of failure. Amp Medics, DB-R, Zed, SoundWest... guys who know their stuff and charge accordingly. Those guys will also beef up FET lands and other weak points that might be known on any given amp.

Buying something that's been repaired by some hack or unknown shop would be a huge gamble, but from a respectable shop it's likely safer than buying new.

 

[adulbrich 5,000+ posts]

High IMPEDANCE is more efficient and less heat. Halving impedance = quadrupling heat input voltage has nothing to do with that.
Of course, under-built, unregulated power supplies are susceptible to failing with inadequate electrical, but that's a different thing entirely.

A LEGIT repair shop will be able to tell what has failed and what needs replacing after any given type of failure. Amp Medics, DB-R, Zed, SoundWest... guys who know their stuff and charge accordingly. Those guys will also beef up FET lands and other weak points that might be known on any given amp.

Buying something that's been repaired by some hack or unknown shop would be a huge gamble, but from a respectable shop it's likely safer than buying new.

Yes, I've heard that first part before. I don't disagree.

Ok, if proper electrical and running low impedance isn't connected, fine. I'll accept that as fact. Regardless, improper electrical isn't good for amps.

That's an interesting point. I'd trust those companies.

My 20.2kw was repaired and worked fine

 

[germanyt 10+ year member]

Google has results with both spellings //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Well I was being cheeky. Not srs.

 

[germanyt 10+ year member]

Kinda like bison vs buffalo Crayfish vs crawfish vs crawdad

Not not exaclty. A bison and a buffalo are two different animals. And a crawfish is a crayfish but I'm from Louisiana and I've never heard anyone actually say crawdad.

 

[adulbrich 5,000+ posts]

Well I was being cheeky. Not srs.

Gotcha

Not not exaclty. A bison and a buffalo are two different animals. And a crawfish is a crayfish but I'm from Louisiana and I've never heard anyone actually say crawdad.

We say Crawdad here in the Midwest. I live in Illinois now, but people say Crawdad in Iowa and Wisconsin too. Lived in both of those states

 

[Papermaker85 5,000+ posts]

High IMPEDANCE is more efficient and less heat. Halving impedance = quadrupling heat input voltage has nothing to do with that.
Of course, under-built, unregulated power supplies are susceptible to failing with inadequate electrical, but that's a different thing entirely.

A LEGIT repair shop will be able to tell what has failed and what needs replacing after any given type of failure. Amp Medics, DB-R, Zed, SoundWest... guys who know their stuff and charge accordingly. Those guys will also beef up FET lands and other weak points that might be known on any given amp.

Buying something that's been repaired by some hack or unknown shop would be a huge gamble, but from a respectable shop it's likely safer than buying new.

im lost? why is high impedance better?

 

[adulbrich 5,000+ posts]

im lost? why is high impedance better?

He's saying it's better for the amplifier. Less current flowing through certain components at higher load impedances. It'll be more efficient and stable

 

[Papermaker85 5,000+ posts]

true, but current it was make the loudspeaker work. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[adulbrich 5,000+ posts]

Current and voltage, yes.

Just typed out a long rant, then deleted it because nobody cares and most people know about voltage vs. amperage, lol

 

[Papermaker85 5,000+ posts]

the current is what creates the EMF(electromagnetic field) that reacts to the magnetic field. voltage is just the pressure. higher voltage doesn't create more force within the motor high amperage does.. as said depeningn on how over built the amp is it will fair better at lower loads efficiency wise. but yes 2 ohm is slightly more efficent, but only becasue your not near the transistors limit like at 1 ohm.

 

[adulbrich 5,000+ posts]

Higher voltage does equate to gains. When you strap amps, your doubling the voltage, not current. That's my understanding

 

[wew lad 5,000+ posts]

true, but current it was make the loudspeaker work. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

what the fuck is power then? are you kidding me

 

[wew lad 5,000+ posts]

as said depeningn on how over built the amp is it will fair better at lower loads efficiency wise.

again, no

 

[wew lad 5,000+ posts]

the current is what creates the EMF(electromagnetic field) that reacts to the magnetic field. voltage is just the pressure. higher voltage doesn't create more force within the motor high amperage does.. as said depeningn on how over built the amp is it will fair better at lower loads efficiency wise. but yes 2 ohm is slightly more efficent, but only becasue your not near the transistors limit like at 1 ohm.

jesus man do you know anything about electricity and physics

wew lad this is proving to be a real job

 

[Papermaker85 5,000+ posts]

jesus man do you know anything about electricity and physics
wew lad this is proving to be a real job

do what? why dont you tell me