Ion Obelisk

[whazz]

ION Obelisk 1 Phono input stage schematic

Hello, I'm the lucky owner of an Obelisk 1 amp, yesterday, due a problem with some connector, I've opened it and I discovered that it has an all discrete phono stage (infact I noted that the phono stage sounded pretty good...). Since I want to change some caps in way to improve it, I ask if someone outside here have the schem... many thanks
Al

 

[lohk]

Here we have a nice little passive/active mm-stage - when modifying keep an eye/ear on the capacitors C3 and C5, not only on the signal coupling devices.

 

[NRWler04]

Does anybody out of this thread here know the schematics of the new Heed - Obelisk Mono Block Heed Obelisk PM). Would be intersting to see what changed over the years from Nytech to ION to Heed .....

From pictures we saw on the WWW and a schematic in a Britsh DIY-Hifi-Book it looks like a Mosfet-Amplifier Stage. But this is only an assumption ....

 

[whazz]

HA! Ok, I forgot this topic since I've just upgraded it in 2007, but I'm glad to have the schematic... 😀

 

[laughingbuddha]

Hey anyone know the difference between the heed Si and X2 Mkl and Mkll ??

Also why the Heed Dactilus 2 card onboard card - draws so much power third of the volume seems to disappear ?

 

[NRWler04]

HA! Ok, I forgot this topic since I've just upgraded it in 2007, but I'm glad to have the schematic... 😀

Which schematic do you have?

 

[laughingbuddha]

Heed Si and X2 MKII

Well I dunno - it is a late Heed MK II Si and X2

 

[NRWler04]

Well I dunno - it is a late Heed MK II Si and X2

That's very interesting.....

 

[laughingbuddha]

Sorry mean't a late MK I

 

[NRWler04]

Anyway, I'm very interested ....

See also here: http://www.diyaudio.com/forums/solid-state/214899-diy-project-nytech-cpa602-today.html

 

[laughingbuddha]

I paired the Heed Si and X2 to some monitor Audio BX2's on stands interesting clean sound
got some black Rhodium Jazz cables I made up running into both units,the 80 Watts is a bit much for the BX2's 75% into the volume but very little distortion noticed clipping here and there from the BX2's but mostly fine.

My main problem is with the onboard Dac Card drawing lots of juice anyone know why I'm loosing like a 3rd of my volume nothing to do with cables same no matter what is used ??

 

[laughingbuddha]

I played some recordings of Kudo drummers very impressed with the Heed and for the money the BX2's it was like they were in the room.Janet Jackson sounds pretty good to haa

 

[whazz]

I have the schematic that Lohk has posted 😀

 

[NRWler04]

I have the schematic that Lohk has posted 😀

That's Obelisk 1?

 

[whazz]

That's Obelisk 1?

Yes, so is wrote in the schem, check the post n. 102

 

[Warefs]

Ion Obelisk100 Schematic

Hello everybody

Do any one have Schematic for ION Obelisk 100 or Service Manual
or form where can I get it ?🙄

thank you So Much