Tag: 1. Dezember 2021

Hifi-Speaker test/review: Mission 780 MK.II vs Mission 780 / Mission LX-/QX-2 MK.II

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so, 😉

as i wanted to upgrade my hi-fi in general, i´ve bought 2 month ago some Mission 780 MK.II; they were two times “speaker of the year” and as i´ve tested my old 780 against  some Wharfedale Diamond 9.1 ->http://essabre-90xx-rpi.sfb2.com/?p=2137 and was absolutely disappointed (see the post) i thought i stuck with the “Mission-direction” (and okay, have to test some KEF, Dali Zensor, Monitor Audio etc.,etc.,etc.) but for the present i´ve ordered them with 2 not “original/Mission” bass-driver (these Mission 780 MK.II were extremly “rare” ->https://www.hifishark.com/model/mission-780 )

but in a very good condition + niciest wood-veneer and bought afterwards the missing 2 bass-driver also..

got them at home, replaced the driver and voilá: wonderful, lively, unbelievable, “roomy/airy/3D-ish” “Mission”-sound ! 😉

BUT: to thin ;-( ..no wonder, the overall “volume” of the speaker-cases is unsufficient (IMO)..) by that, the “old” 780er sounded really better/more hi-fi then the new ones (but absolutely not so lively/clear like the new-ones, MK.IIs)..

and so as i was unsatisfied with the case-volume of the MK.IIs i came across the much newer Mission LX-/QX-2 (MK.II) !!->399€->

(last 2. picture: Philip Thielen -> https://www.lite-magazin.de/2021/03/mission-lx-2-mkii-fuer-hohe-ansprueche-und-kleine-geldbeutel/)

and yes, as u see, they are much more voluminous, “bulgy”, thats what i also thought, want to have 😉 (in comparison to the 780 MK.IIs)

so, i guess that would be the next “goal” 😉 (and afterwards maybe some Monitor-Audios or KEFs or Dali or or or or 😉 )

in these sense, many greets for now 😉

PROJECT IV: PART 3 / Dual DC +-15 / LibreELEC / Toroidal T.+ LM317/337

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so, 😉

as said, burnt my Philips BDP9500-powerboard with these fabulous dual DC (+-12V) ->(see post before) but i didn´t give up 😉 and so i tried another way to get my wonderful dual DC 😉 ..

okay, as i have now only straight/normal +12V DC (via another line on the powerboard (have still of course the toroidal Dual AC (18V1 + 18V2, more later)) i thought why don´t buy a single DC to Dual DC-converter !! ? (found it by chance,  didn´t knew its possible)-> 5,50€ Aliexpress-> https://de.aliexpress.com/item/32924044001.html

and so i could test-out again the “benefits” from dual DC..

okay, the dc-dc converter runs a little bit hot (had to screw the poti a little bit up (from 12V to +- 15V)(use a little 5V-fan to cool it) but again, such a nice sound/tune from dual DC (absolutely better channel separation etc., see also post before) (and now with the, for me missing, “push” from the +-15V instead of +-12V before !!) + and this time i used “LibreELEC“->https://libreelec.tv 

because i´ve got the Rasberry Pi Zero 2 earlier, (and wanted to check the usability as a media-center with only 512MB Ram from the Zero 2) and voilá also a nice sound via Pi 4->Skysong XMOS-USB-bridge->I2S->ES9038Q2M; really a little bit “airier” maybe better as with “Volumio” for example (but also a little bit more “distorted”, have to evaluate it more), but absolutely nice, these better dual DC-sound 😉 ..

and because i´m an absolutely dummy/noob concerning electronical things like these whole dual AC/DC.-thing (but made these site also for people with no knowledge in these things 😉 , to learn about it) i also found out by connecting the toroidal 18V1/18V2 to a simple dual AC to dual DC-converter (see post before) that i got a massive voltage drop under load (means: set to +-15V out, dropped under load extremly about 4-5V (to 11V for example), had not such a drop with the single DC-rail/line, discussed it with some friends and yes, absolutely clear, u need some capacitor to “buffer”, like with these ->”regulated LM317 + LM337 power supply board AC-DC” with some 35V/2200uF capacitors for example ! 😉 (as said, totally clear for some electronical-hifi-freaks but not for me till this point); there are a lot of them around, also with greater capacitors, but just to learn about)..this thing cost about 9€ ->https://de.aliexpress.com/item/32570124466.html

(Voltage input-range: Dual AC28V (three lines), Voltage output-range: ±DC1. 25 V to 30 V adjustable.)

good 😉 ,

so, and now we´ve learned:

you have to use/need a regulated power-board behind some toroidal transformer !! 😉 (and some “thermistor” before, another time..)

more to come + greets for now 😉