marrantz diy dac

[bull041161]

Hi all i have a marrantz cd67 and wanted to know if i can use any dac with it.I have seen some ready built circuit boards on ebay but apart from them i cant seem to find any more,Any help would be great

 

[merlin2069er]

Hmm, I just was googling up your marrantz 67 CD player, and it looks like it might have an optical output.

If it does you'll need a optical input on your DAC (and an optical cable between them.)

 

[bull041161]

Yes does have optical input,do you know who sells the ready built boards,Or what other upgrades give you better sound without spending loads.realy i am after more detail

 

[merlin2069er]

There are so many Dac options, it depends what your budget is.

Here's one you might like to consider ...

http://www.audio-magus.com/product_p/am707.htm

or

http://www.obadimports.com/catalog/item/4377355/6829249.htm

You can find dacs on ebay, but make sure you get an optical input on it.

 

[bull041161]

Yes i have had a look on ebay and found 2 i was after one that was a just a circuit board and no case as thay are cheaper,Just had a look at the link you posted but thay are out of my budget

 

[Fidelity Audio]

The cd67 has optical and coaxial outputs

Brent

 

[bull041161]

Hi all can some one take a look at this dac on ebay and tell me weather it would make my marrantz 67 sound any better the item number is 130305543663 thanks

 

[Fidelity Audio]

That is very cheap for what you get there. It may sound a little better but there are a lot of cheap parts on the pcb that ultimatly hold back the sound (just like in the 67).

Have you not thought about modding your 67?

Brent

 

[bull041161]

Hi brent i would love to do some mods on my 67 but not sure were to start or what components i kneed,What i want is more detail which component change would give me the bigest upgrade for the price i cant realy afford a lot of money so it would have to be done in bits.What differance would changeing the oppamps give me

 

[Fidelity Audio]

Over the original opamps the detail change would be pretty big. We always use LM4562 (LME49720) with some rubycon za caps on the power rails.

Simple upgrade and it will impress you. Once thats all in you can bypass the HDAM + muting section so the audio runs direct from opamps to the sockets. This allows you to hear the opamps properly.

As you go along there are lots of little tweaks you can do

Brent

 

[bull041161]

Hi again mate i am not realy electronic minded but i can use a soldering iron so im gona give it a go.Were is best place to get oppamps from and do you just solder them in or use a dil sorry to be hard work but im new to this hifi moding.Just got an amp 6 it sounds really well but think the cd player is showing its limitations

 

[Fidelity Audio]

Hi

I have to be careful here as I do sell the opamps. You can link to my site below.

Dil sockets are good for swapping different opamps in and out. Other than that solder then straight in. When you get your bits I will be only too happy to point you in the direction of HDAM bypass etc

Brent

 

[bull041161]

Hi again thanks for your help do i need 2 of these oppamps and do i i need any other components to get the best from these,TOLD YOU I WAS AN ELECTRONICS DUMMY

 

[Fidelity Audio]

Yes you need 2 (if budget allows the LME49720HA (metal can type) is that little bit more detailed and dynamic). + 4 capacitors - Rubycon 16V 470uF ZA work a treat.

These small mods will open up a whole new world of what's possible.

Brent

 

[bull041161]

Hi again will i need some silver wire to bypass the HDAM CIRCUITE or can you use some speaker wire. I have ordered parts so should be here soon allso will the opamp and capacitor upgrade give me a smoother trebble as its a bit fierce

 

[Fidelity Audio]

The treble should be much more controlled rather than in your face. For most upgrades I use a good quality copper wire (poor silver can make treble harsh) like Kimber. So if you have some speaker wire thats thin enough to use try it even better would be a bit of interconnect wire , the wire here makes very little difference so don't worry too much about what to use.

Brent

 

[bull041161]

Are the merrantz known for the agresive trebble then or is it something else in my system thats the problem. Allso does damping the chassis of the cd player really make it sound better

 

[Fidelity Audio]

Damping does make a difference yes, especially as the costs are low.

Marantz are not usually aggressive no. Do you use any silver plated wire in your system? If so swap it with some cheaper lead and see if the treble calms down to eliminate.

Also any mods you do need a good few days to settle down.

Brent

 

[bull041161]

No mate no silver wire i have a 41HZ AMP 6 MARANTZ CD 67 THROUGH SOME MISSION M70I SPEAKERS the phono lead conecting cd to amp is a realy stiff thick one looks good quality but dont know what make it is. It sounds ok when there not much going on in the music but when the the music gets busy it seems to get confused edgy IF YOU KNOW WHAT I MEAN but the detail is brilliant with the 41hz amp i have had some amps over last 20 years NAIM MUSICAL FIDELITY . QUAD MARANTZ but this amp is the best i have had

 

[bull041161]

Hi again i have now got my opamps and capacitors the opamps in the cd player have got 214D JRC wrote on them and the 4 caps in between the opamps have 25V 100UF wrote on them are these the right ones to change