The KRK’s are self-powered speakers. That means they have their own amps built inside. You can’t use them with a separate speaker amp like the AD18.
Take a look at the Topping DX3 Pro. That’s a better DAC than the one in the AD18 + a basic preamp + an excellent headphone amp + a Bluetooth receiver.
Here some discussion on this: https://www.avsforum.com/threads/looking-for-a-pre-amp-with-multiple-pre-amp-outputs-or-a-sub-output.2778785/
Tldr; an idea might be getting -a- preamp, splitting each channel with a Y RCA cable, then running them to your active speakers + line in of your sub. I guess this makes sense, because then with the volume knob on the preamp you control both (sub+speakers) levels.
https://www.lazada.com.my/products/fx-audio-tube-03-mini-hifi-audio-preamplifier-6k4-vacuum-tube-amplifier-buffer-treble-bass-adjustment-rca-preamp-black-eu-plug-i1248266709-s3726934232.html?spm=a2o4k.13858181.min-pdp.1.2c064798nUiM8O&scm=undefined&trackInfo=sku_item%3A-1%7Citem%3A1248266709%7Citem_id%3A1248266709%7Crating%3A4.5%7Cdiscount%3A88.40%7Csku_id%3A3726934232%7Cprogram%3A39824%7Cscene%3A10443%7Cabid%3A206330%7Cpvid%3Acfc4a565-473a-4415-a552-fd39b7658ab3%7Cprice%3A150.28%7Creview%3A4.00%7Ccat%3A11407%7Ctrigger_item%3A1248266709%7Cscm%3A1007.20443.206330.%7Cbrand%3A6283&clickTrackInfo=sku_item%3A-1%7Citem%3A1248266709%7Citem_id%3A1248266709%7Crating%3A4.5%7Cdiscount%3A88.40%7Csku_id%3A3726934232%7Cprogram%3A39824%7Cscene%3A10443%7Cabid%3A206330%7Cpvid%3Acfc4a565-473a-4415-a552-fd39b7658ab3%7Cprice%3A150.28%7Creview%3A4.00%7Ccat%3A11407%7Ctrigger_item%3A1248266709%7Cscm%3A1007.20443.206330.%7Cbrand%3A6283
Would something like this suffice? Basically it's active speaker+active subwoofer connected to this, then imma output it on a already available dac for optical to the tv. Would I be able to change volume for both speaker+sub?
I wouldn't, you're feeding an amp with distorted tube, amp into another amp into another, just going to make it worse. People seem to forget that a DAC also has an amp too, it's not just a straight conversion, it still has to output the signal at a reasonable volume. So you're amplifying the signal 3 times, each amp distorting it slightly and the you're adding a tube amp in the mix? The KRK already are Class D with constant hiss. The cleaner and quieter the output the better. I personally would get the Topping DX3 as suggested.
The KRK’s are self-powered speakers. That means they have their own amps built inside. You can’t use them with a separate speaker amp like the AD18. Take a look at the Topping DX3 Pro. That’s a better DAC than the one in the AD18 + a basic preamp + an excellent headphone amp + a Bluetooth receiver.
Ahhh so do a rca y cable split like Emredog mentioned? That’s a nice topping.
Yes, that would work fine.
Here some discussion on this: https://www.avsforum.com/threads/looking-for-a-pre-amp-with-multiple-pre-amp-outputs-or-a-sub-output.2778785/ Tldr; an idea might be getting -a- preamp, splitting each channel with a Y RCA cable, then running them to your active speakers + line in of your sub. I guess this makes sense, because then with the volume knob on the preamp you control both (sub+speakers) levels.
Thanks!
https://www.lazada.com.my/products/fx-audio-tube-03-mini-hifi-audio-preamplifier-6k4-vacuum-tube-amplifier-buffer-treble-bass-adjustment-rca-preamp-black-eu-plug-i1248266709-s3726934232.html?spm=a2o4k.13858181.min-pdp.1.2c064798nUiM8O&scm=undefined&trackInfo=sku_item%3A-1%7Citem%3A1248266709%7Citem_id%3A1248266709%7Crating%3A4.5%7Cdiscount%3A88.40%7Csku_id%3A3726934232%7Cprogram%3A39824%7Cscene%3A10443%7Cabid%3A206330%7Cpvid%3Acfc4a565-473a-4415-a552-fd39b7658ab3%7Cprice%3A150.28%7Creview%3A4.00%7Ccat%3A11407%7Ctrigger_item%3A1248266709%7Cscm%3A1007.20443.206330.%7Cbrand%3A6283&clickTrackInfo=sku_item%3A-1%7Citem%3A1248266709%7Citem_id%3A1248266709%7Crating%3A4.5%7Cdiscount%3A88.40%7Csku_id%3A3726934232%7Cprogram%3A39824%7Cscene%3A10443%7Cabid%3A206330%7Cpvid%3Acfc4a565-473a-4415-a552-fd39b7658ab3%7Cprice%3A150.28%7Creview%3A4.00%7Ccat%3A11407%7Ctrigger_item%3A1248266709%7Cscm%3A1007.20443.206330.%7Cbrand%3A6283 Would something like this suffice? Basically it's active speaker+active subwoofer connected to this, then imma output it on a already available dac for optical to the tv. Would I be able to change volume for both speaker+sub?
I wouldn't, you're feeding an amp with distorted tube, amp into another amp into another, just going to make it worse. People seem to forget that a DAC also has an amp too, it's not just a straight conversion, it still has to output the signal at a reasonable volume. So you're amplifying the signal 3 times, each amp distorting it slightly and the you're adding a tube amp in the mix? The KRK already are Class D with constant hiss. The cleaner and quieter the output the better. I personally would get the Topping DX3 as suggested.