preamp necessary?

[soundnovice]

hi
i am planning to use objective DAC which uses ESS9023 DAC chip which gives out 2Vrms. So will this be enough to feed to T-amp (TA2021B) without preamp stage?

 

[merlin el mago]

Yes.

 

[stratus46]

hi
i am planning to use objective DAC which uses ESS9023 DAC chip which gives out 2Vrms. So will this be enough to feed to T-amp (TA2021B) without preamp stage?

The TA2021 will deliver 20 Watts into 4 Ohms with 0.745 Vrms (datasheet page 9). No preamp needed IMO.

G²

 

[soundnovice]

thanks for clarifying doubt. t-amp (smsl sa-s21) is having onboard volume control, but if i want to add balance control, then what are my options? also i am interested in remote controlling the volume as an added requirement.

 

[KatieandDad]

You can add volume control and balance control without adding additional amplifying stage.

 

[soundnovice]

You can add volume control and balance control without adding additional amplifying stage.

how this can be done?
any links to kits or articles will help

 

[DF96]

One simple way to do it is to add the balance control to the top of the volume control. Dual pot with the same resistance as the volume pot, but linear instead of log. Then arrange wiring so the balance control adds resistance to one channel as it reduces on the other. Roughly, this gives you a +-3dB variation on each channel. Ought to be enough unless your room is a very strange shape.

 

[soundnovice]

something like as in figure 3 of below link?
High Quality Audio Preamp

 

[DF96]

No. That circuit allows for complete cutoff on one channel, which is much more than you need. It loads the source (typically by 5k) so can increase distortion. It can also introduce crosstalk via the balance control slider. Surprising, as that site is usually quite reliable.

 

[soundnovice]

No. That circuit allows for complete cutoff on one channel, which is much more than you need. It loads the source (typically by 5k) so can increase distortion. It can also introduce crosstalk via the balance control slider. Surprising, as that site is usually quite reliable.

an example circuit diagram will be helpful.

 

[DF96]

This is what I mean.

 

[soundnovice]

This is what I mean.

thanks DF96
its clear to me now.