Thread: JOB 225 2-channel Power Amplifier ... update ...

I should note that I did find it just a touch dull on the top end of the frequency range... But I swapped out the Audioquest and WireWorld IC's for solid conductor silver units from Morrow and all the sparkle was there in spades.

Like I said, this amp is VERY revealing and transparent. Swapping cables is very apparent and is a great way to "tune" the JOB to your individual tastes.

- Woody


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Originally Posted by ICTWoody

I should note that I did find it just a touch dull on the top end of the frequency range... But I swapped out the Audioquest and WireWorld IC's for solid conductor silver units from Morrow and all the sparkle was there in spades.

Like I said, this amp is VERY revealing and transparent. Swapping cables is very apparent and is a great way to "tune" the JOB to your individual tastes.

- Woody

Cables are very important. The stock power cord is just a throw away, the higher end power cables add to the transparency of the Job. I need another Sweetcord, right now I have one hooked up to my Sony and a Virtue power cord hooked up to the Job.

Originally Posted by ozarktom

Cables are very important. The stock power cord is just a throw away, the higher end power cables add to the transparency of the Job. I need another Sweetcord, right now I have one hooked up to my Sony and a Virtue power cord hooked up to the Job.

I agree here as well. I haven't tried the Sweetcord yet, I've been using it with a Shunyata Venom 3 I had as a spare and it's a nice improvement over the chepo stock cord. The V3 is a great budget PC... I might try some others down the road, but I'm quite content at the moment.

- Woody


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Originally Posted by Mike

+1. I said this from day one. The sweet cord really adds sweetness....and I'm not kidding.

Originally Posted by wisnon

Woody, my pals say you GOTTA use the sweetcord with the amp!

I guess I need to move it up my list of wants. :-)

- Woody


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I appreciate that someone put pictures (not small please) of Goldmund / JOB sweetcord.

Got a confirmation the other week JOB coming out with a preamp by Mid-June. Cant wait! I asked them to put me on the list as soon as its available.

Just had a quick question. With the JOBs preamp coming around the corner I really think JOB 225 is super transparent. I had the Oppo 105 hooked straight to the JOB 225 recently and today tried the irDAC from Arcam with the Sonos connect and the sound is really different. warmer, more musical and soundstage is alot wider and airier. Although I love the irDAC mids and high and prefer it over the sabre dac on the oppo, (clearly better in my ears) I do miss
the bass of the oppo. It simply had more weight. (just on the bass department)

My question is, with the Job 225 preamp around the corner, can a preamp make the bass tighter and add more weight?

I hooked up both irDAC and oppo straight to the Job 225 when i was doing A/B. Was using oppo as a preamp and now using the Sonos line in to control volume.

Only if the JOBs preamp can add more weight to the bass and make it tighter, id recommend this set up to anyone... I KNOW its not the JOB 225 thats lacking in bass, because I clearly heard diffrence when changing dacs ONLY. Job is just super transparent itll play what you feed it as accurately as possible imho.

Can anyone tell me if the preamp can make the sound different/add more weight to the bass and make it fuller and tighter? (any preamp for that matter)

Thanks!

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Thanks for the reply Northstar. I forgot to mention that I have returned the Oppo 105 because I also prefer transperency, smoothness and and open 3d soundstage. And the irDAC did it very well compared to the oppo 105. Oppo just kinda sounded sterile and not very musical. Soundstage was small compared to the irDAC fed to the Job amp.

I guess I am trying to find out if the Jobs upcoming preamp can bring the bass to my system thats lacking with the irDAC... or, if anyone had any experience in a setup like mine (whichever set up you have had) where the bottom end was lacking and a preamp fixed the issue. .






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Now that you mention it Joe if the Jobs upcomig preamp is passive, I might just get the eximus dp-1 to use as a dac and preamp for the job amp.The sonos that i just bought has a remote app to control volume so I dont have to get up everytime I want to change volume.A few reviewers of the eximus said that it dosent lack any bass so it might just be the ticket for me..

If the Jobs preamp comes out active, I am definately getting it. It also makes more sense that a active preamp would alter/stregnthen the signal more so than a passive preamp. I just hope Job focused on stregnthning the signal of the bottom end in my case

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Perhaps

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Just got confirmation from JOB the new preamp will be an active preamp. 3 more weeks!!

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Another great pre for the Job is the $299 IFI Itube. The 3D circuitry is addicting, sometimes you are in the middle of the soundstage. This unit becomes great when you hook up an Astron SL11A linear power supply modded for 9v to it. I paid $114 for this and it actually improves the Itube by 100-150% better. I just wish it had a remote.

Hi guys just thought I would drop in and say the Job sounds excellent and I enjoy every moment. I was at a friends house a couple of nights ago and he had oh about 100k into his system. It sounded excellent as well, but when I got home, I was not disappointed one bit. This is not to say his system was better or worse, just that I am very happy with mine. I am using the new Chord Hugo DAC and Richards LDR with a pair of pro K-horns (Klipsch TSCM's with Dave Harris's eliptrac horn B&C 750 drivers and ALK gentle slope Xoers). Still need a Sweat Cord if anyone wants to sell theirs??????

Guys, what is the price point of the new Job preamp? And from the pictures I have seen it looks like it only has one set of outputs, it needs two sets of outputs.

Hi, I'm new here because I'm very interested by the Job 225. I've just discovered this amplifier but I've a question, sorry if it has already answered elsewhere but this thread is very long

While reading the first remarks (last year) on this forum something alerted me on the risk of DC in speakers. Then after several people was waiting for a new model (not sure here, to well understand).
I would plan to plug my DAC directly to the JOB 225. Is still there a risk with the model (220V, I'm living in France) you can buy on Amazon?

Thank you
Pat

Originally Posted by playntheblues

Hi guys just thought I would drop in and say the Job sounds excellent and I enjoy every moment. I was at a friends house a couple of nights ago and he had oh about 100k into his system. It sounded excellent as well, but when I got home, I was not disappointed one bit. This is not to say his system was better or worse, just that I am very happy with mine. I am using the new Chord Hugo DAC and Richards LDR with a pair of pro K-horns (Klipsch TSCM's with Dave Harris's eliptrac horn B&C 750 drivers and ALK gentle slope Xoers). Still need a Sweat Cord if anyone wants to sell theirs??????

Guys, what is the price point of the new Job preamp? And from the pictures I have seen it looks like it only has one set of outputs, it needs two sets of outputs.

Job told me the other week the Preamp will be approximately the same price as the amp. So $1,699.00

Welcome Pat, and thank you Naim.

Originally Posted by Elberoth

I have the irDAC at home right now, and I have to admit the new Arcam is AWESOME. It is much better than it has any right to be at this price point. It is smooth, natural, with great resolution and soundstage. However, the deep bass is not its forte. You may try running it with a HQ linear PSU - like the Teddy Pardo one, which will enhance a great deal what is already great with this DAC - but will hardly improve the bass.

Thanks for reply. Trying to decide between the Teddy Pardo PSU and the MCRU PSU.. do you know which one might be better for the irDAC? It seems like Teddy Pardo only has the PSU for the past model rDAC..

Originally Posted by Yami

From JOB, The new preamp will have only one pre out, and remote.

I'm salivating. Headphone output?

Today is my first post and I'm very curious about the JOB, I have Revel Salon, these speakers would be a very difficult burden for this amplifier?

I've used the JOB for the last several months with the Vandersteen Treos which JA measured at 82db and they do fine even at higher levels.

Originally Posted by Jack

I've used the JOB for the last several months with the Vandersteen Treos which JA measured at 82db and they do fine even at higher levels.

Do you find the heat sink gets very hot? My speakers are 8ohm/ 89dB and I can't even touch it for one second at its hottest. I've started using a small USB fan firing at the heat sink and it makes a massive difference.

It used to get really warm when I first got it during the break-in period and then cooled down. To be honest haven't even thought to check it lately.

Originally Posted by Jack

It used to get really warm when I first got it during the break-in period and then cooled down. To be honest haven't even thought to check it lately.

When I had mine it was at most lukewarm but my speakers were easy drive.

Just did a test using a digital thermometer with probe touching a heatsink. Music = dub reggae, volume = medium, room = medium, ambient temp = 24c

without fan = 66c/ 152f. With fan = 30/ 86

Speakers are easy 8ohm load

If this is out the ordinary, I'll get in contact with Job, but I remember someone reporting similar figures on another site.

I just checked mine after about an hour at of about 85db ABB and if I press down on the heat sink it is in fact hot, but the case itself is not. I though heat dissipation was the heat sinks job?

Just redid the test on a cooler day (21C inside), playing 50's Jazz. = 55c, playing for half hour or so. That would increase with deep bass no doubt.

Not out of the ordinary

At least not for the Job . Someone else measured theirs on another site and got similar resulsts. Playing loud (which I wasn't) could easily take it over 70C! Hopefully the internal components aren't going to have a shortened lifespan.

Without the fan, that's pretty hot

It got plenty hot in winter too when the ambient was in the teens centigrade.

Originally Posted by gist

Just redid the test on a cooler day (21C inside), playing 50's Jazz. = 55c, playing for half hour or so. That would increase with deep bass no doubt.





At least not for the Job . Someone else measured theirs on another site and got similar resulsts. Playing loud (which I wasn't) could easily take it over 70C! Hopefully the internal components aren't going to have a shortened lifespan.





It got plenty hot in winter too when the ambient was in the teens centigrade.

So, why are you so concerned about the heat sinks becoming warm or even hot? That just shows that they are doing their..."Job"! Now, if the case became too hot to touch, then that would be cause for concern. Just relax and enjoy and the music it makes!

Originally Posted by RPM-123

So, why are you so concerned about the heat sinks becoming warm or even hot? That just shows that they are doing their..."Job"! Now, if the case became too hot to touch, then that would be cause for concern. Just relax and enjoy and the music it makes!

RPM is right, why worry? Back in the 80's I sold several class A amps the you could almost fry an egg on, especially the Bedini amps. There were no issues. And if you have ever ran Atmosphere OTL amps, these will heat up your whole room.

My Job 225 ran burning hot, burning hot. I found one of my rca inputs to be loose and turning/twisting. I presumed this was causing a short, and sent the job for service, which was very expedient. Supposedly not a short..... but upon return it performed flawlessly without becoming burning hot. It is easy enough for Jobbers to check the stability of the rca inputs. Considering how we, me too, may change interconnects this could lead to a maddening intermittent issue as well.
Q: is there by now a consensus as to what fuse will serve musicality the most ?

Originally Posted by Lutfisk

My Job 225 ran burning hot, burning hot. I found one of my rca inputs to be loose and turning/twisting. I presumed this was causing a short, and sent the job for service, which was very expedient. Supposedly not a short..... but upon return it performed flawlessly without becoming burning hot.

Interesting. So Job tweaked your amp to alter its running temp!

Thanx for the fuse news, Joe !
From before, I would not say that my Job was "tweaked" towards a lower temp.. The only info. after discussing potential short was - no short. Rca input tightened up. Thats all.
Personally, I could imagine that there was a relationship between my loose rotating connector and the excessive heat. And if it happened to my unit, maybe it is happening to other units as well.
Maybe just a correlation, rather than a cause and effect. At least, simply check to make sure your rca connector aren't loose.

i don´t have the 225 but i know that the older Job amps, being hyper-wide bandwidth amps , were rather sensitive to RF and some units from first batches showed to be prone to oscillation problems in some conditions. I guess that Job people have solved this and improved a lot the amp, but the job225 is still a wide-bandwith amp.
Specially for people living in a bad RF area, near a AM /LW radio station, the Job could be amplifying something else than music, specially if bad shielding cables are used. This may result in overheat the amp and its HF protection (and RL circuit at the time). I would try to use line cables with good quality shielding and construction, running far from the speaker cables to avoid HF oscillation.

Cool info about a hot amp.
Could powercables also affect the interconnects the same way and freak out the amp ?

Originally Posted by medivierte

I would try to use line cables with good quality shielding and construction, running far from the speaker cables to avoid HF oscillation.

Hi. I'm using original Chord Anthem ($400 approx) with decent shielding. Also tried a cheaper cable but didn't notice any difference in heat.


Attachment 6491


To quote Chord:

The Anthem was the first Chord Company interconnect to employ high frequency effective shielding, helping it to achieve new levels of performance

check to make sure your rca connector aren't loose

they are tight.