Questyle CMA Fifteen — Official Thread
Feb 2, 2024 at 6:21 AM Post #333 of 359
Looks like it's essentially the same product apart from a new DAC. That's not a criticism just an observation.
Also the amp stage is a little bit different
 
Feb 2, 2024 at 11:22 AM Post #334 of 359
Looks like it's essentially the same product apart from a new DAC. That's not a criticism just an observation.
Which DAC does it now use?
 
Feb 2, 2024 at 10:48 PM Post #336 of 359
current mode amplification remains a mystery to this layman. i am under the impression that the cma circuit converts voltage to current and then back to voltage again at the output stage. happy to be enlightened.

edit: scrap that. found a helpful explanation here
 
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Feb 4, 2024 at 5:04 AM Post #341 of 359
Looks like the gain control on the Eighteen is still 4 switches on the bottom of the device. What a joke lol
Why is it a joke?
 
Feb 4, 2024 at 7:47 AM Post #342 of 359
Why is it a joke?
1707050748131.png

The gain control was the #1 complaint with the Fifteen, and they did not fix it.
 
Feb 4, 2024 at 9:57 AM Post #343 of 359
The gain switches are on the PCB bottom for sound quality reasons.. to keep the shortest signal path possible.

But yes its inconvienient to operate them.
They could have used levers that stick though the chassis.
 
Feb 4, 2024 at 10:12 AM Post #344 of 359
The gain switches are on the PCB bottom for sound quality reasons.. to keep the shortest signal path possible.

But yes its inconvienient to operate them.
They could have used levers that stick though the chassis.
Electronic switches are not an option?
 
Feb 4, 2024 at 10:30 AM Post #345 of 359
Electronic switches are not an option?
Only if its a relay but that wouldnt fit between the PCB en housing bottom.

Questyle assumed users have one headphone and would choose the gain once i guess.
 

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