Why DAC manufactors has not an option 3.5/6.3 jack for interconnection?

[M0du1e]

Subj. Today when we appreciate multiple connectivity options, modern dacs have XLR/RCA/IIS/AES/Bluetooth options to connect it whatever you want. But it doesn't include jack, 3.5 or 6.3. I have old audio interface E-MU 0404 USB, it have 3.5mm or 2x6.3mm line outputs, I connected it to my O2 amp with 3.5 jack input and that's it. But if I plan to upgrade either DAC or Amp, then I have to upgrade both, since neither of them have RCA.
My question is: is there reason to not have jack as interconnection option? Or manufactors just not bother to have it?
P.S Sorry for my broken English

 

[Doodski]

The connections between home audio equipment have not historically used 3.5mm or 6.3mm. The ones that you see that do use this are very uncommon. Veryyyy uncommon...

 

[RayDunzl]

If I understand correctly, a conversion cable may find a place in your future:

Example:

3.5mm Stereo to RCA Audio Cable, 3.5mm Stereo Male to Dual RCA Male

There is likely to be a type suitable for any application.

 

[M0du1e]

5

If I understand correctly, a conversion cable may find a place in your future:

Example:

3.5mm Stereo to RCA Audio Cable, 3.5mm Stereo Male to Dual RCA Male

View attachment 68798

There is likely to be a type suitable for any application.

Thank you, I will look for it. But it's hard to find such cable, local dealers have no idea about them.

 

[RayDunzl]

Thank you, I will look for it. But it's hard to find such cable, local dealers have no idea about them.

https://aliexpress.ru/wholesale?cat...20200614002920&SearchText=3.5mm+stereo+to+rca