I now have an Acme 300B in my Line Magnetic 805ia, in preference over the Elrog 300B. There seems to be synergy between it and the Acme 805s just as with the Acme 300B and the Acme 274B in the Lampi DAC.
Not if the value declared by the supplier is very low
Sometimes declaring too low is wrong. Customs can establish their value for the goods.
Mr. Yong Lee of https://www.china-hifi-audio.com is also a serious person known by some Italian buyers, for having purchased tube amplifiers from his website.
You can find the manual here:
https://www.line-magnetic.eu/images/line-magnetic/pdf/Manual-LM-219IA-web.pdf
Do a search in it for the bias adjustment section.
Edit: Sorry, reading on my phone, missed the part where you said you had the manual. Hopefully someone with the 219ia can chime in. I have the 805ia, so can't help.
https://www.line-magnetic.eu/images/line-magnetic/pdf/Manual-LM-219IA-web.pdf
Do a search in it for the bias adjustment section.
Edit: Sorry, reading on my phone, missed the part where you said you had the manual. Hopefully someone with the 219ia can chime in. I have the 805ia, so can't help.
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Reading the "bias adjustment section", I understand that when it says "Before adjustment please
select v1 / v3 or v2 / v4 position. 845: IA = 70mA, 300B: IA = 50mA "
On the front panel (845) I select V1-V2;
Set the number scale (1, 2, 3, etc.) to 7, set the number scale (0, 10, 20, etc.) to 0 (IA = 70mA?),
Then with a screwdriver on the top of the integrated I bring the pointer on the central dot.
After (300B)
I select V3-V4;
I set the scale of numbers (1, 2, 3, etc.) to 5, I set the scale of numbers (0, 10, 20, etc.) to 0 (IA = 50mA?),
Then with a screwdriver on the top of the integrated I bring the pointer on the central dot.
is it right as reasoning / procedure or am I wrong something?
Thank you
select v1 / v3 or v2 / v4 position. 845: IA = 70mA, 300B: IA = 50mA "
On the front panel (845) I select V1-V2;
Set the number scale (1, 2, 3, etc.) to 7, set the number scale (0, 10, 20, etc.) to 0 (IA = 70mA?),
Then with a screwdriver on the top of the integrated I bring the pointer on the central dot.
After (300B)
I select V3-V4;
I set the scale of numbers (1, 2, 3, etc.) to 5, I set the scale of numbers (0, 10, 20, etc.) to 0 (IA = 50mA?),
Then with a screwdriver on the top of the integrated I bring the pointer on the central dot.
is it right as reasoning / procedure or am I wrong something?
Thank you
Hi Fagella,
Just trying to work off memory but should come to you from the factory OK and be set right as you receive it... but if you start with no signal and the bias turned to the left and wind it up from there you should be fine.
From memory aim to get the upper meter to 70 ma for the 845 and the lower meter should then show 50 ma for the 300B driver.
Then switch to do the other 845 and 300B on the other side... repeat and rinse. Nice amp btw. Enjoy.
Just trying to work off memory but should come to you from the factory OK and be set right as you receive it... but if you start with no signal and the bias turned to the left and wind it up from there you should be fine.
From memory aim to get the upper meter to 70 ma for the 845 and the lower meter should then show 50 ma for the 300B driver.
Then switch to do the other 845 and 300B on the other side... repeat and rinse. Nice amp btw. Enjoy.
Good evening
I need help / advice with the 300B vacuum tubes of my LM-219IA integrated amplifier. How can I check if the standard 300B have a problem?
I made a check of the bias and especially with the V3 I was unable to adjust the exact bias as described in the operation manual.
Even if I adjust the screw on the top of the amplifier to the maximum, I cannot bring the indicator into the central dot. I attach photos. Thank you
Attachments
I had never used LM219A.
But it seems that your tube has some problem.
If you contact seller of the tube, then he will replace it with new one with one year warranty.
That is what my seller did.
https://www.hifi-amplifiers.com/en/psvane-vacuum-tube-amplifiers-c-67/
The vacuum tubes are the standard ones.
I contacted the dealer (Mr. Robert Lai) and he replied that he will send me a new pair of 300Bs as soon as possible.
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I'd be curious to hear your impressions of the LM845 vs an aris cerat genus integrated.
yet to be done again properly (the time I tired, it was too hasty, so many things did go wrong so I would say that I could't have a proper listen for proper verdict. I promise to try again, shall try to record on my zoom H6 this time for sure. will post here as well to let you know! moving the LM845 around is a daunting task hence it wont be immediate. but at least I know what to do the next time I'm there.
in all fairness, initial impression is AC Genus is the better amp, which is expected at such varying price points. i can also confidently say the LM845 is an excellent amp for the money. maybe the best value for money would be LM219ia. however hauling my amp to the other friend with the LM219ia is another difficult mission. it would be great though to check cause I never saw anywhere a direct comparison between these two.
in general, listening to Kassandra ref2 DAC + genus integrated is an experience by itself. the hand shake between the two components yields in a sound that the least to describe in my book and taste, is almost perfect. wonder what higher models of Aries Cerat could do? kass + genus has an expansive stage, crazy dynamics and grip, perfect tonality from top to bottom with endless details.
AC recommends Elrog 845s with it as an upgrade and my friend got them. I've briefly tried the ACME 845s in the genus, my feeling is the ACME has more details, more frontal row presentation. the Elrog is a "relaxed" tube, "clean" sounding tube. I would not say rolled off in highs though. in fact its a totally different sound presentation which is enjoyable. I will probably have these elrog 845s for the whole next week, will post my impressions as well while trying them in my LM845 amp. that would be happening before the final amp face off which I will try to do soon.
hearing the kassandra ref2 and realizing what a real high end dac could do, made me buy a better dac finally. something I never felt I would need for two whole years with denafrips terminator while my system kept changing around it. I just pulled the trigger on a Rockna wavedream signature XLR DAC. the kass is too big of a component for my taste - it does not even fit in my rack, and most importantly way too expensive for my budget which is already way too exhausted. if the rockna could give 90% of the kass performance, I'm a happy man. I have been reading about it for while, now its a going to be reality within few weeks of wait.
You mention that AC recommends the Elrog 845. I thought that the Genus uses 813s(?)
The latest version of the genus uses 845s. Its not even yet updated on AC website.
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