tomasEXetien píše:Dynaudioacoustic BM5 sem ted mel doma na par (......)
severskyho fjordu a navrharu z ikei je tam patrna. nekdo to mozna neoceni, ale ja jo.
co teda oceni kazdy, je absolutne tichy zapinani a vypinani a v pripade ze do tech beden
nejde zadnej signal, je to pocit na hranici rozkose.
to je asi tak vsechno.

... hmmm, ehm .... chce ty bedny pujcit nekdo kdo mluvi a pise cesky ? ))

driv sem mival mensi trable s cestinou, dokonce sem psaval i diktaty, tak za 2-3.
ted co sem uz leta pure mestsky geto chasnik, se to asi trochu zhorsilo

To SAFA:

Nevíš náhodou, jestli jsou v BM5 a BM5A použitý stejný repráky?

... mmno tak s urcitosti nevim, ale pripada mi to nanejvys pravdepodobny ...

aaa, tak to me vic oslovil Asterix, Zelvy Ninja, Ducktales, Rychly Sipy (byly doby, kdy jsem je umel nazpamet mozna cely, nekecam), Lobo, Ctyrlistek, Hana a Hana, XXX Comics ,) Z oldskulu jeste Kometa special (Kaja Saudek...), Chata v Jezerni kotline...jo a manga... noo a taak, jdu spat uz radsi ,)

Heee Cyrile co to meles ?

safa píše:... mmno tak s urcitosti nevim, ale pripada mi to nanejvys pravdepodobny ...

Jestli jo - dá se nějak objasnit, proč je to tak dělaný ? resp. jestli je k tomu nějakej technicky opodstatněnej důvod - teda u BM5A - tam to nějak nemůžu skousnout.

BM5 mají podle údajů na webu udanej dělicí kmitočet 2700 Hz a strmost 6 a 12 dB a BM5A 1500 Hz a strmost 6 dB (???)
Pracovní objem se přitom moc neliší.

Proc ? No to se me teda ptas moc ... ja jen vim ze jsem se taky zajimal jestli to neni chyba tisku a bylo mi receno ze ne, ze tyhle repraky tech 6dB/o klidne snesou. Ale vic nevim ...

Což o to, 6 dB výhybku "snese" každej reprák.

Otázka ovšem je, na jakém kmitočtu a při jakém příkonu - a těch 1500 Hz dělicího kmitočtu při strmosti 6 dB by prakticky znamenalo, že výškový reproduktor bude extrémně zatížen (a to i ještě nižšími kmitočty - kvůli poklesu na tom 6 dB filtru)

mne to tiez pride ako typo... neni velky problem spravit slusne aj 24dB elektronicku vyhybku...
6dB pasivne vyhybky mam rad, koli nizsej impedancii, ale v aktive je to kravina.... a ten deliaci kmitocet je fakt prinizko, to by tweeter musel vyzerat celkom inak...

hosi fakt nevim. Ptal jsem se na to (mozna jeste nekde najdu ten mail ... ) a je to skutecne 6dB/o ... a verim, ze ti hosi co to vymysleli asi dobre vedej co delaj.

jo ale aj ta deliacka je 1500? keby to bolo 3500 (co moze byt preklep, uznaj) a 6dB, tak to by bolo tak akurat... divne sice, ale mozne riesenie

slibil jsem a nasel:


Hello Jan,
Don't worry about the this. And this is not uncommon, 6dB is used in many speakers, and yes one of the argument has been against it is that it can be more "fragile" and it can create some trouble with phase. But on the other hand it is simpler and no component makes a speaker sound better so sometimes, less is better. The right cross-over depends on the drivers as-well - if you use 6dB with lower quality drivers there is a risk of burning them, but Dynaudio drivers are the best, this means that power handling is much better than with most drivers. The magnetic fluid in the gap, also makes the tweeters more resistance - as-well does the voice coil in aluminium (many uses copper which is less resistant). As long as there is no clipping a tweeter normally never brake - and there is protection in the speaker as-well. Actually what makes tweeters brake is often when the amp starts to distort, and the amps in the BM5A is of very high quality and naturally made to control the drivers. I can say - that Dynaudio (not in the pro-range) since the very beginning have been using 6dB filters (always a difference from acoustically and electrically). - they have 30 years of experience, so you better trust them . But basically 6dB with good drivers can be a good solution. At DynaudioAcoustics there are no dogmas - they develop what makes the best sound in each project so for the 5A they chose 6dB. If you need a more seintific answer than I can give you right away I can ask tech. support to help you.

Best Regards,
Rune

safa píše:slibil jsem a nasel:


Hello Jan,
Don't worry about the this. And this is not uncommon, 6dB is used in many speakers, and yes one of the argument has been against it is that it can be more "fragile" and it can create some trouble with phase. But on the other hand it is simpler and no component makes a speaker sound better so sometimes, less is better. The right cross-over depends on the drivers as-well - if you use 6dB with lower quality drivers there is a risk of burning them, but Dynaudio drivers are the best, this means that power handling is much better than with most drivers. The magnetic fluid in the gap, also makes the tweeters more resistance - as-well does the voice coil in aluminium (many uses copper which is less resistant). As long as there is no clipping a tweeter normally never brake - and there is protection in the speaker as-well. Actually what makes tweeters brake is often when the amp starts to distort, and the amps in the BM5A is of very high quality and naturally made to control the drivers. I can say - that Dynaudio (not in the pro-range) since the very beginning have been using 6dB filters (always a difference from acoustically and electrically). - they have 30 years of experience, so you better trust them . But basically 6dB with good drivers can be a good solution. At DynaudioAcoustics there are no dogmas - they develop what makes the best sound in each project so for the 5A they chose 6dB. If you need a more seintific answer than I can give you right away I can ask tech. support to help you.

Best Regards,
Rune

Díky, bohužel , výše uvedené to moc "neosvětluje" . Navíc teda "komerční" Dynaudia teda nemusím...

Našel jsem si test BM6A v MUZIKUSU - (jak vidět, dotyčnému recenzentovi se to taky nějak nepozdávalo). Navíc tam taky píše, že BM6A a BM5A mají stejné osazení reproduktory (?)

Jestli je to pravda, tak je mi to ještě větší záhadou, proč jsou ty BM5A dělaný ,tak jak jsou dělaný, protože BM6A mají dělicí kmitočet 2200 Hz a strmost filtru 24 dB.

A podle všeho tam konstruktér odvedl opravdu dobrou práci a věděl,co dělá, a i když ty použité repro super-turbo-highend nebudou, tak se mu asi podařilo vydolovat v rámci možností maximum.

Příklad toho, jak může hrát aktivní bedna při bezchybném návrhu "když se to umí" ...


Ještě jednu všetečnou otázku - ty BM5A navrhovali přímo v Dynaudioacoustics ?

Ptám se proto, že u BM6A tomu tak nebylo

bm5 komercni dynaudia? to je dynaudio acoustics... monitory, nie hifi