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

Dev

I don't know what the improvements are from the 35 over the 25 either until someone that has owned both tells us what they hear. David from AC and Gopher/Fred have enough experience to know the differences. I suspect that with either version or whatever amp you try from my experience the M3's benefit from a pair of subwoofers crossed over at between 40-50 hz. Though my Spatials are fine with no help they come alive with the two ACI's crossed at 40hz. I think they need subs with speed more than absolute bottom. If I had to buy new subs for them it would be Rythmik F-8's.
 
Jack, yes a pair of Rythmik are in my radar as well but why not the F12 instead of F8 ? Do you see added benefits going dual ?
 
Dev

I've already got a pair of F12SE's in the main system and they are great so I guess I would just like to try the other option. Don't think you can lose either way.
 
Jack said:
Randy

Now that you have done the DAC upgrade you need to do the preamp upgrade. Maybe he has a Level 2 at the shop that he will let you try against the base model. If Srajen is right then you will be hooked again.
Click to expand...

You are right Jack. I am planning on looking into the Stage 2. Hopefully my next move after getting headphone amplifier taken care of. I believe that I am wasting the Benchmark using it only as a headphone amp and wasting it's hybrid preamp and new generation ESS DAC chip. We will see how it all unfolds :)....
 
Found this site searching for information about the Job 225. Pretty sweet! The only time I get to acquire anything close to high end audio gear is when I happen to be in the right place at the right time. I have some decent Klipsch heritage speakers and recently found a Job 225 that is not working for dirt cheap. I bought it in the hopes of getting it fixed and still coming out ahead.

When the amp is turned on, the light in the front illuminates amber (a little brighter for the first instant, then stays slightly dimmer, but on). Nothing seems to be sent to the speakers. I've tried a couple sources.

Is there an internal fuse for the speakers or something? The fuse accessible from the rear for power is fine. I can not get the case off to look inside. As mentioned earlier in the thread, the case screws are teeny hex screws that Thor must have tightened. I have two sets of wrenches, both SAE and metric. None seem to even fit as snugly as I'd like and Yes, I've stripped at least one so far.

If you have gotten this far in my post, do you happen to have any advice before I simply take it in?


Thanks for your time!

-John
 
The amp does run pretty hot (but not class A hot) when driving harder loads, it gets only very warm when driving an easier load. I Popped the lid and the transformer in this thing is a high quality made in UK toroid of a decent size considering how small the amp is, the power mos-fets are also high quality by EXicon. It is as noted in the manual wanting of careful set up regarding all connecting cord shielding and routing. I opted to flip the Ic connector and use a shielded Volex 90 degree angle plug, which steers the AC cord to right side of amp, well clear of the somewhat cramped rca, speaker, ac connectors on the back of unit. AC is straight to wall. There is only a very low level of hum. It makes nice music.
 
We now can do suggestions at the Job Facebook page. Any software/hardware update on the INTegrated would suit me. Keeping it abreast with time.
 
I took the plunge and also purchased the Job 225. I was considering the Nord but my setup is RCA not XLR and I don't need 400W so I thought I would keep it simple as it sounds like there isn't much sonically between them.
it works great via Inious zen, Naim Dac v1 and Stereo Coffee LDR pre.
my power cables are Cabledyne and neotech 3200 and neotech silver interconnects.
Im impressed so far, but looking at changing my speakers from my modified Monitor Audio 20SE, that I have had for 17 years!
I heard the Kef LS50 at a show and liked their presentation although the bass wasn't as tight or deep as I would like. Maybe Job 225 would tighten them up! Then maybe add a quality sub, or maybe I should stick with a floor stander. Any suggestions will be grateful.
Thanks
 
LS50 and Job is a pretty common pairing and sounds great together. The LS50 are pretty inefficient so respect the volume as to not overdrive the 225.
 
Glynn

The bass on the LS50 is going to be what it is and the Job won't change it. I'm not a fan so I think there are plenty of other options depending on your price range and if you are in the US, Europe or Canada. If the KEF is what you want to try you should have no problem finding a used pair for a really good price.
 
I own ls50, job 225 and monitor audio studio 2se (19yrs old). Overall I don't think LS50 is better than the studio series monitor audio from the 90's The studio 2se beats the kef everywhere but deepness of bass. The MA tweeter is better. The kef have more bass, but it can be a bit overblown in some situations, and it is not what I'd call well differentiated in any case, the mids are where ls50 excel. The Job 225 runs quite a bit hotter with ls50 than any of my other speakers. The Rega Elicit (previous model to the current Elicit R) has better bass depth and differentiation than the job 225. The job 225 has better mids and soundstage depth. I don't consider the 225 to be a bass king....I think of it as more of a nicely communicative amp. I would think twice about letting the 20se go right off. Maybe stick them aside and be sure first.
 
Thank you for your advice.

Right, my amp has been running for 150 hrs and I'm disappointed.
The Job 225 isn't working with my speakers/ room.
I'm getting too much bass and boom. My 25 year old (modified) Audiolab 8000P has a tighter more controlled bass with less punch that works better with my speakers and room. I don't get it!
midrange detail is superior from the Job.
my MA studio 20se speakers are an issue being rear ported and my room is 13 ft sq so not ideal.
The speakers are on the limit size to room as floor standing but not that big.
maybe I made the wrong choice of amp and should have gone for the Nord!
I have tried positioning the speakers but doesn't make much difference.
 
There 20se would suit a large to medium room. I don't know if any amp is going to fix too much speaker for the room size. I also have a hypex Ucd based class D amp. I think both it and the job are good amps. You might consider a small monitor (with good stands) for your room. Dynaudio emit 10, or one of the smaller monitor audios if you like the MA sound. The LS50 might be worth a try too. All the accolades re the LS50 shouldnt sway you from other considerations. On class D, Some people like UCd better than Ncore, some like Ice or Nuprime. Some like the Job 225 more than any class D. Tryng different configurations of amp and speaker along with whatever sources you use in your listening room is really the best way to find what works well.
 
Glynn

I have owned the 225 for over three years and tried it with a least a half dozen speakers both bookshelf and floor standers. Over bearing bass energy is one trait I would never attribute to the 225. If anything it can be lighter in the bottom than other amps. If you think you have a problem with the 225 the bass energy from the Nord amps is a lot more. As you hinted yourself, your biggest problems are too much speaker for that smallish square room and rear ported at that. You could try putting something that would work at an absorber behind the ports and see if that helps or even partially stuff the ports. Ideally a sealed or front ported speaker would work better.
 
My experience on bass boom... I've got a 3,3 x 4,5 meters room. The 3,3 meters is the listening depth. So I have a bass problem around 55Hz. It shows nicely on measurements with calibrated microphone. The problem became appearent when I upgraded from Penaudio Rebel (55-28000Hz) speakers to Penaudio Cenya (45-28000Hz). More base but also more boomy. I decided I prefered the added base.
I looked at my amplifier next. I owned a Sonneteer Alabaster. Tried a Rega Elex-R but kept the Alabaster. Than I bought the Job INTegrated and sold the Alabaster. I have not regretted that but there is no change in the bass boom.
Just this week I bought PMC twenty 21 speakers second hand. It solves the bass problem. Drastically! I will keep the Cenya's :-)

What helps with a boomy bass is digital parametric EQ. I've used a Beheringer DEQ2496. Replaced that with a bit of EQ using ffmpeg while transcoding the music files on the NAS with Minimstreamer.
 
I agree with you all so thanks for the comments. The Audiolab obviously has a leaner bass so the bass issue wasn't as obvious and is famously well suited to the 20se speakers.
I took the Job 225 to my local hifi dealer (Zouch Audio in Ashby de la Zouch - UK)
and tried out a variety of speakers and 3 of them sounded great - Dali Rubicon 6, Proac D20 and Dali Rubicon 2. The Rubicon 2 was my favourite and as a standmounter should work with my room although the rear port could be an issue, also they are 4 ohms so would look at a usb cooling fan on the heat sinks that has been mentioned.
I want to audition the LS50, Proac D2 and PMC 21and 22 and see how they compare, not sure what else yet.
 
Jack said:
Glynn

I have owned the 225 for over three years and tried it with a least a half dozen speakers both bookshelf and floor standers. Over bearing bass energy is one trait I would never attribute to the 225. If anything it can be lighter in the bottom than other amps. If you think you have a problem with the 225 the bass energy from the Nord amps is a lot more. As you hinted yourself, your biggest problems are too much speaker for that smallish square room and rear ported at that. You could try putting something that would work at an absorber behind the ports and see if that helps or even partially stuff the ports. Ideally a sealed or front ported speaker would work better.
Click to expand...

agreed, I also have some absorbers that improve the room slightly but not enough.
 
Glynn have you tried stuffing the ports with something like the expanded foam plugs that many subwoofer companies like SVS package with their products. Something similar should be available. If not you can just start with socks. The PMC 22's from either series look like they would do the trick, also if there is a Reynaud dealer anywhere close the Silver Bliss would fit the bill as it is front slotted transmission line book shelf. All of their speakers are front slotted transmission line by design. Another candidate if the sensitivity is not an issue would be the ATC SCM19. Maybe some of the other UK or EU members will pitch in with appropriate models available to you that I would think of.
 
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