Humboldt just tripped,

He was jamming , the amp got hot and Shut itself off , its not detective stuff , Those WA loudspeakers can be a tuff load and requires plenty current , the Humboldt exceeded its SOA...


no Biggie ..



Regards
 
greystoke4 said:
Hi have a few friends round, few beers, playing Uriah heep free'n' Easy, over 96db on the db into Wilson audio sasha's , meter, showing -16 db on the amp, don't actually know what this means, sounded great, then boom nothing, message came up on the screen of the humboldt, right channel overload, shutting down, and discharging :eek:, waited 10 mins fired it back up, no problems, crapping myself,:confused:, were up and running, at a lot less level, but still good, 70-80 db, more 70db than 80db, my spectral 360m mk2 mono's were a lot louder, used to shake the house, only now and again ,
we were all there at the Innocent victim tour at demontfort hall way back in the day, i did think that John Lawton was a great singer,
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A few questions: when you say over 96DB how much over 96DB? Also, how far away were you sitting / measuring?

Also, FWIW I have the Max monoblocks and Vivid Audio Giya G2 speakers which are ~89DB efficient and never below 4 ohms impedance. Your Wilsons are 91DB but drop to ~1.5 ohms around 120hz if memory serves. I have on rare occasion played music into the low 90s DB and never had a problem other than to say it's damn loud IMO. I sit about 10.5' from tweeters to my ears. The Audionet amps as I'm sure you know do have significantly more safety features than most amps, and as others have said take it as a warning. It may be your voice coils are heating considerably increasing the load on your amp and maybe the amp saved your speakers.
 
I used to trip my breakers until I installed a dedicated 20 amp line for each amplifier. After that the breakers never tripped again. However, after that I blew up both speakers. You just can’t win with this game. Oh well, that’s life. :)
 
Hahaha , this is hilarious ,

Relax guys , the protection is to save the amplifier which in turn would save the speakers , all of this was already discussed with Kuoppis and predictable from the bench test results.

The amplifier is optimized for 8 ohm loads the further away you get below 8 ohms , the more issues you will have, its Just how the science works ..



Regards
 
BlueFox said:
I used to trip my breakers until I installed a dedicated 20 amp line for each amplifier. After that the breakers never tripped again. However, after that I blew up both speakers. You just can’t win with this game. Oh well, that’s life. :)
Click to expand...

Yes , but how glorious was the sound before you blew them..


:)
 
Check all power and cable connections to make sure they’re tight. The interconnect wiggled lose on my monoblock once, which led to an amp shutdown.

Ken
 
a.wayne said:
Hahaha , this is hilarious ,

Relax guys , the protection is to save the amplifier which in turn would save the speakers , all of this was already discussed with Kuoppis and predictable from the bench test results.

The amplifier is optimized for 8 ohm loads the further away you get below 8 ohms , the more issues you will have, its Just how the science works ..



Regards
Click to expand...

Not sure what you mean that it's optimized for 8 ohm loads. It's spec'd for 8 ohm@320W and 4 ohm @ 460W - that's almost 1/2 kilowatt per channel. And it's not just the speaker impedance but the speaker sensitivity, room size / distance from speaker to listener and loudness expectations that all come into play.
 
Exactly ,

you are seeing serious PSU and output beta droop , hence the huge drop in current delivery from 8 to 4 ohm if not you would see 600 watts at 4 ohm at a min. This will be 4 times worse at 2 ohms , in other words this amp will prolly trip its protection at less than 200 watts @2 ohm , hence why it did so on the WA loudspeakers at elevated levels .

This amp should not be operated below 8 ohms for best performance IMO and will be at its best on 8 ohm speakers, its performance on low Z speakers can be predicted from its bench measurements ...


It is not a low z design and is obviously optimized for 8 ohm loads, amplifiers designed as such will have judicious amount of safety protection circuits to prevent failures , this is not unusual .

Regards
 
do you have any experience with this amplifier?
or have you got at least any data sheet you could pass over?
 
Audionet Humboldt

if you scroll down a little you will see true measurements.
humboldt has 275@8
and 476@4

another measurement i saw was around 250@8 / 460@4

conclusion was that it is very stable and will drive any speaker they know.
a watt/putty8 is no challenge for the humboldt.
i had 3 different wilsons with the humboldt and the pairings were great. powerful black bass that only a handful big monos will do better.
feedback from all around the world with all kind of speakers....everybody loved it
 
Im sure its a great sounding unit and at 50K it should be , but i don’t normally read marketing specs, means nothing really , Their unit was tested by Sterophile , so true real world bench measurements in real time, based on those measurements i would stand by my statements and suggestions ..


Tells the tale ...!


Regards
 
Mandela moment on my part it was not stereophile so disregard on my part as i cannot find previous discussion ..!

It was Absolute sound :

Conceived on the same platform as the Stern linestage and using the same unique floating panel design for optimal resistance against microphonic effects as well as temperature stability, the $55,000 Humboldt offers a stereo output of 320Wpc into 8Ω, or 460Wpc into 4Ω, with a frequency response of 0–700,000Hz (-3dB), DC, or 3–700,000 Hz (-3dB), AC. The A-weighted signal-to-noise ratio is given as greater than 120 dB, with a channel separation greater than 140 dB, from 20–20,000Hz.



Regards
 
sry i editted my post because you enhanced yours.

i admit audionet should update its webpage. 320@8 is wrong
 
Its factory specs and that German magazine was very well ahem not specific , in case you missed it their 8 ohm rating is way below the factory rating yet the 4 ohm rating isnt ..!

So if the magazine is correct Audionote is lying on their 8 ohm spec you cant have it both ways
 
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