Anzgar said:
As far as wiring, look at the "monoblocks can be a problem" section of:
http://www.lcaudio.com/index.php?page=63
I know of this problem, but I've been running 2 x 2.2se monoblocks for about 2 years know, and have not experienced any probs.
I have also A-B listened between my monoblocks and the Predator, and my monoblocks clearly won.
They're specs as follows:
800VA 2x42
ELNA Cerafine 10000 63v
IXYS 26-12NO7 Rectifiers
2.2se module.
Duelund silverwiring.
When I recieve my 700XE modules I am thinking about building 2 new monoblocks.
I have been looking for some good components fore them, but havent succeded!
Where in EU can I get good components for a 350W version.
What DC voltage must i use on the 700XE to get 350W (50v?)
😕
Anzgar said:To me it appears ridicoulusly overkilled.I am using one 300VA 2x24V transformer😀
The information I got is no bigger trafo than 550VA per one or two modules.
As far as wiring, look at the "monoblocks can be a problem" section of:
http://www.lcaudio.com/index.php?page=63
That issue is supposted to be solved for the 2.3SE (and 700XE) modules.
Overkill? Maybe, but toroids are relatively cheap (compared to a commercial amplifier of the same quality). I would not use the modules with less than 1000VA (if wou want to have a 700 watt amp). Preferably 1000VA per channel. The PS is still the most important part of the amp imo.
Okay 2000VA/channel is a bit "over the top".
Where do I get that big a trafo in EU, or preferebly Denmark?
I can't seem to find any
I'm also having trouble finding capaciters in that range.
What kind of rectifier do you prefer using, and where do I get it.
And finaly does somebody know where to find a nice cabinet.
I hope I'm not ruining this thread............
Should I open a new thread with these questions?
Sorry i have not posted any pictures in here yet, but you can get an idea here hifi4all
I can't seem to find any
I'm also having trouble finding capaciters in that range.
What kind of rectifier do you prefer using, and where do I get it.
And finaly does somebody know where to find a nice cabinet.
I hope I'm not ruining this thread............
Should I open a new thread with these questions?
Sorry i have not posted any pictures in here yet, but you can get an idea here hifi4all
What loudspeakers are you using guys to need such large psus and so much power? Are they extraordinary insensitive or do your listening rooms approach the size of a concert hall or a church?
My magnetostatics are insensitive but even a NAD 3020 can drive them louder than I find comfortable, well, I don't listen to Rolling Stones or heavy metal but to jazz and classics only
My magnetostatics are insensitive but even a NAD 3020 can drive them louder than I find comfortable, well, I don't listen to Rolling Stones or heavy metal but to jazz and classics only
Hm I nearly bougt a Crown Studio Reference 1 (800 watt @ 8 ohm) just for the bass below 150 hz. (but decided for a 500 watt Crown K2).
My sealed bass speakers are 84 db/w/m. they go down to 27 hz -3 db)
Toys for boys I guess. I don't smoke however 🙂
My sealed bass speakers are 84 db/w/m. they go down to 27 hz -3 db)
Toys for boys I guess. I don't smoke however 🙂
Well I for one, am playing on Martin Logan Ascent i, so I really don't need more power than I have now, but if it's in reach I will grab it. 
Mayby it could put it in use sometime later 😀
Mayby it could put it in use sometime later 😀
Duck-Twacy said:
As ChevyDK said, it's a matter of cash too...I am under priviligied in cash and I do smoke
I'm not familiar with the Denmark audiosupplies scene 🙂ChevyDK said:Where do I get that big a trafo in EU, or preferebly Denmark?
I can't seem to find any
I'm also having trouble finding capaciters in that range.
What kind of rectifier do you prefer using, and where do I get it.
And finaly does somebody know where to find a nice cabinet.
I hope I'm not ruining this thread............
Should I open a new thread with these questions?
Sorry i have not posted any pictures in here yet, but you can get an idea here hifi4all
Maybe Lars can help here 😀
(the thread is a bit off topic anyway, I dont mind)
Nice set though
Maybe, but a smaller toroid wich is driven to the limit gets warmer and may also go humming after some time.
Of course that is more an issue with good old class A
Of course that is more an issue with good old class A
Here is a link to a Swedish company which sells toroids.
Trimlog
Ringkärnetransformator=toroid nästa=next 🙂
The most suitable ones are,I believe 800 VA or 1000 VA, 2x53 V,
the later weighs 6,6 kg and delivers 2x9.43 A. They are manufactured by Toroid, a well known Swedish brand, and are good quality. Another source is BMM-electronics,a Dutch company,
they sell toroids of the brand Amplimo, made in U.K. 2x55 V ,800 VA or 1000 VA , and of course we are talking monoblocks.
😎
Trimlog
Ringkärnetransformator=toroid nästa=next 🙂
The most suitable ones are,I believe 800 VA or 1000 VA, 2x53 V,
the later weighs 6,6 kg and delivers 2x9.43 A. They are manufactured by Toroid, a well known Swedish brand, and are good quality. Another source is BMM-electronics,a Dutch company,
they sell toroids of the brand Amplimo, made in U.K. 2x55 V ,800 VA or 1000 VA , and of course we are talking monoblocks.
😎
The golden mean said:
In that case you should definitely use one 500VA each monoblock
"no bigger trafo than 550VA per one or two modules"
Anzgar said:
In that case you should definitely use one 500VA each monoblock
"no bigger trafo than 550VA per one or two modules"
It doesn´t make sense to me.
😕
If an amp is supposed to deliver 700W in 4 Ohms , I can´t understand why the VA rating should be so "low". Are we taking
RMS Watts or Just "music watts"?
🙄
ChevyDK said:
Hello ChevyDK...
i believe www.elsupply.dk at Bornholm is capable of delivering very cheap 1000VA 55V transformers... ( = 77vDC ) - The 700XE module has the same spec's in power rating and so like the 2.3SE... - Just, when using more than 63vDC ( IE 45 vAC Transformers ) you should remove the "big" blue disc mounted, which is a 65v VDR...
When it comes to "overshooting" the power supply, you should consider two 530VAC trnasformers of those on the LC Audio page, due to the fact that there is a separate "earth" coil on the transformer thus to reduce noise
Larger Toroids "may" be more typical to hum mechanically but that can be solved by a large can of floor laquer...
btw..:
The "no more than 550VA for..." sentence in the LC White Pages is due to the fact's that the CE approval of the 2.3SE is performed with that size... - So in order to obtain CE persistency, you shouldn't use larger...
In regards to the Short-circuit prtection fault..: "somebody" in a mounting plant somewhere, decided that the used faulty component in that part, which wasn't in stock, could be substituted with another component. The substitution component is not fast enough, so some times the short-circuit part isn't fast enough, and there is a 50% chance of burning the module if you short it when running...
We are now looking for something faster - please do not inquire to Jens Posselt about this, as he have no clue, when we solve it... - But off course we WILL post here...
Sincerely, Lars / Viborg - Tech Support for LC Audio
ChevyDK..:
A 55v, 1000VA toroid @ 515 dKr. = 69 EUR...
Cheap enough, ay???
http://www.el-supply.dk/?Gid=&Vid=8075
I have no economic interest in the company stated, it is merely linked and priced as an example, as ChevyDK asked about where to get larger toroids at fair prices...
Please do not be angry. - It might look as advertisement, that is NOT the intention.
Lars / Viborg - Tech Support for LC Audio
A 55v, 1000VA toroid @ 515 dKr. = 69 EUR...
Cheap enough, ay???
http://www.el-supply.dk/?Gid=&Vid=8075
I have no economic interest in the company stated, it is merely linked and priced as an example, as ChevyDK asked about where to get larger toroids at fair prices...
Please do not be angry. - It might look as advertisement, that is NOT the intention.
Lars / Viborg - Tech Support for LC Audio
nillerviborg said:
Hi Lars, I doubt there's going to be any problem in that regard, don't worry, it's good information 😉
Regarding the big blue disc, or MOV I'd assume, is that not for protection against load dumping to save the output stage from self destruction? Do you really recommend it be removed without recommending an upgrade for use with higher rails or is a warning to the users to not unplug the speakers while powered sufficient?
Regards,
Chris
PS: Nice update, seems things have turned around.
I believe the intent is to soak the whole transformer in it.😀
The most efficient method however, uses vacuum for this purpose.
From the German company Mundorf´s web-site:
VACUUM IMPREGNATION &
BAKED VARNISH COILS
In non-impregnated coils, vibration occurs as a result of the current flowing through the coil. The microphonic effect, i.e. the conversion of mechanical into electric oscillations, adds these oscillations back to the original signal as additional information. In this way, details of the original signal are overlaid and rendered unrecognisable. The music loses spatial quality and transparency. This process is prevented by vacuum impregnation.
In vacuum impregnation, the coil is first impregnated with a special lacquer under vacuum. Because of the vacuum, this lacquer flows right into the innermost windings. The lacquer is subsequently dried in an oven at 130 øC. Thus the whole coil is baked into a very solid unit. The individual windings are prevented from vibrating and the original signal remains uncorrupted.
Vacuum impregnation preserves musical details which give the music natural liveliness and an excellent spatial quality. It is thus an important component for a really audiophile reproduction of music.
The windings of baked varnish coils are made using a special wire. After the coil has been wound it is heated up causing an additional layer of varnish on the wire to melt, bonding the individual windings firmly together. The effect is similar to that achieved with vacuum impregnation, but this process is cheaper for small coils. Baked varnish coils are available with winding diameters from 0.71mm - 1.40mm. All series are identified with a "b" prefix.
The most efficient method however, uses vacuum for this purpose.
From the German company Mundorf´s web-site:
VACUUM IMPREGNATION &
BAKED VARNISH COILS
In non-impregnated coils, vibration occurs as a result of the current flowing through the coil. The microphonic effect, i.e. the conversion of mechanical into electric oscillations, adds these oscillations back to the original signal as additional information. In this way, details of the original signal are overlaid and rendered unrecognisable. The music loses spatial quality and transparency. This process is prevented by vacuum impregnation.
In vacuum impregnation, the coil is first impregnated with a special lacquer under vacuum. Because of the vacuum, this lacquer flows right into the innermost windings. The lacquer is subsequently dried in an oven at 130 øC. Thus the whole coil is baked into a very solid unit. The individual windings are prevented from vibrating and the original signal remains uncorrupted.
Vacuum impregnation preserves musical details which give the music natural liveliness and an excellent spatial quality. It is thus an important component for a really audiophile reproduction of music.
The windings of baked varnish coils are made using a special wire. After the coil has been wound it is heated up causing an additional layer of varnish on the wire to melt, bonding the individual windings firmly together. The effect is similar to that achieved with vacuum impregnation, but this process is cheaper for small coils. Baked varnish coils are available with winding diameters from 0.71mm - 1.40mm. All series are identified with a "b" prefix.
- Status
- Not open for further replies.