[penmarker]

I was searching the Lehmann Black Cube Linear for fun on Google and I found this link. Its a reviewer that I regularly visit, and it seems that the Linear headphone amp comes with a companion power amp for speakers called Lehmann Stamp
 
http://www.tnt-audio.com/ampli/stamp-linear_e.html
 
And the product page.
https://www.lehmannaudio.com/power-amplifiers/stamp.html
 
So... next project maybe?

 

[uncola]

is this audiofeel opa301 mk2 a suitable opamp to try in the lovely cube or other lehmann clones?  says it can take 18v

 

[ChrioN]

Anyone measured the temperature inside their amp enclosure? Electrolytic capacitors' rated lifespan are cut in half with each increase of 10 °C (some at 5 °C intervals). No wonder they put caps rated at 12000 hours in this.

 

[penmarker]

I've never measured properly before, but laptops can run for days and days on higher temperatures so I'm not worried.

 

[ChrioN]

All I'm saying is don't cheap out on the electrolytics.

 

[philcrack23]

Hey, i found rare old unused blue 1µ 250 v Epcos MKP, Siemens 0,15µ 250 V Silver Layer for my LM Path.
Two very large dark pink Wima MKP 10 2,2µ 250 V. The capacity is verry good with the old Label Print.
Continue, i replaced everything from China Man.
Then I found to, jellow Wima FKC.

 

[tl13m]

Hi there,
 
Any one try Burson V5 or SS3602 opamp? How does the sound change? is it easy to fit?
 
Thanks

 

[penmarker]

I have tried the Burson V5, the difference is subtle enough for me to question myself whether its an improvement or in my head.

 

[tl13m]

I have tried the Burson V5, the difference is subtle enough for me to question myself whether its an improvement or in my head.

Thanks,
 
What is your Lovely Cube stock opamp? Can you put the cover back after install the V5 inside? any heat issue?
 
I've good impression with V5i for my ZxR soundcard:
 
http://www.head-fi.org/t/623079/creative-sound-blaster-new-series-z-zx-zxr/3270#post_12985681
 
Maybe because I replaced all 4 stock opamps and I have a reference system for comparison, so it is much easier for me to detect the improvement.

 

[penmarker]

Thanks,

What is your Lovely Cube stock opamp? Can you put the cover back after install the V5 inside? any heat issue?

I've good impression with V5i for my ZxR soundcard:

[COLOR=0066CC]http://www.head-fi.org/t/623079/creative-sound-blaster-new-series-z-zx-zxr/3270#post_12985681[/COLOR]

Maybe because I replaced all 4 stock opamps and I have a reference system for comparison, so it is much easier for me to detect the improvement.

My stock OPA was the 4562NA, upgraded by its previous owner. And the cover comes back on with a few mm clearance so don't worry about it. I've recently upgraded my DAC so I might try to do some detailed comparison between the V5 and the 4562. My previous Aune T1 wasn't resolving enough.
There wasn't any heat issues too. I mean if there is, I didn't notice it. The amp already does run quite warm even before the OPA upgrade.

 

[tl13m]

I've switched to V5i today, previous op-amp was OPA2111AM, installing on Lovelycube much easier than soundcard ZxR.
 
V5i is way more musical than OPA2111AM
 

 
 

 

 
 
My office setup:
 
idac2 > Lovely cube > iem/earbud

 

[uncola]

Wow nice to see to13m. I'm going to try an audio feel opa3301 in a Lehman clone this week... hopefully it's compatible

 

[tl13m]

Wow nice to see to13m. I'm going to try an audio feel opa3301 in a Lehman clone this week... hopefully it's compatible

Hi,
 
Where did you brought it? is it from this site?
 
http://www.ebay.com/sch/audiofeelccdt/m.html?item=282202265759&rt=nc&_trksid=p2047675.l2562
 
The web site has a list of op-amp models, what is the different between them?
 
I'm wonder how they can compete with Burson or Sparko Labs. Please share your finding.

 

[uncola]

the differences are listed in the auction bodies.. I'm not very technical but some models won't work in unity gain and some have dc offset trimpots.. headphone amp isn't unity gain so I think 3301 is compatible but it would be great if someone technical were to confirm

 

[tl13m]

Has anyone upgrade standard Voltage Regulator in LC to Discrete Voltage Regulator (DVR)? Any good?
 
I read from Nord Acoustics website, their product use discrete voltage regulator
http://www.nordacoustics.co.uk/product-page/a1659afc-ba55-1b1f-f758-7483a08b9287
 
"Ultra low noise with fast transient responses they sit at the heart of our Nord UP input board providing power to the NC500 and Op Amps. They deliver much of the low level listening ability, soundstage and high end organisation benifits.
The noise specification of the discrete regulators are vastly superior to standard 78XX and 79XX devices. This is made possible by heavy filtering on the internal voltage reference which requires large capacitors that cannot be implemented on standard monolithic designs. Such luxuries are only possible with discrete designs.  While nose specs are important, regulator performance is mostly about transient response and input rejection. Having a fully discrete error amplifier allows for extremely high input rejection and unique compensation techniques that cannot be implemented with standard monolithic IC error amplifiers . I really noticed the benefit of these at low listening levels, detail and dynamics remain, while at high volumes the clarity stays at far higher levels."