A Closer Look: Interior
With the back panel off we see a good number of well-placed wiring pidgeon holes and a smattering of zip tie positions to keep everything neat. The pigeon holes aren't covered in rubber grommets but we don't expect a chassis at this price to have rubber coverings.
From the Tempered Glass side you can see the single 120mm red led fan that is included with the chassis and if you want a front mounted radiator then you will need to remove the drive cage which can fit three 3 1/2 inch platter drives and a couple of 2 1/2 inch SSD's. The power supply is bottom mounted with a wide pidgeon hole provided right where the wires will need to be routed. The only wires that might need to be routed under the motherboard would be USB and possibly the front panel sound.
The back shows 7 expansion ports a bottom mounted PSU and the usual I/O plate opening and a 120mm fan opening. If you look close at the bottom there is a removable filter for the PSU so be sure and lay it aside during the build to avoid possible damage to the filter.
The bottom mounted PSU opening should fit most PSU but being a mid-tower chassis you may need to be careful about some of the longer PSU. We wouldn't suspect length to be an issue in a mid-tower usually those don't need watt monster ginormous PSU though we will check it with a watt monster just to be thorough.
The Manual on the Corsair Carbide Series SPEC-04 says that a front mounted 240mm AIO cooler can be mounted but drive bay removal is required. We checked the top fan mounts and a 240mm AIO isn't happening up there so as the manual states you can rear mount a 120mm and front mount a 120mm and a 240mm. Notice to the top left of the image Corsair snuck in a couple of 2 1/2 inch drive mounts so even mounting our 240mm EVGA CLC Cooler we would have room for a couple of SSD's.
Here are the top fan mounts on the Carbide Series SPEC-04 TG case where you can mount a couple of 120mm fans. Even with a 240mm AIO water cooler front mount, you can still mount 3 larger luxury fans, 2 top one rear. The 3 fan arrangement we used was a snug fit and cable routing in the area was easy even with 3 luxury fans.
With the front off the case, you can see the case was tooled for up to 3 front mounted fans but one spot was sacrificed to the front panel connectors and a cable routing shield. Modders might be able to pull that cable routing cowling and mount a fan here and replace the cowling or mount a 240AIO on top in the interior. There is a pigeon hole higher up that you might be able to route the front panel cables through.
We left the front panel connector shot for now so you can see it in relation to the interior cable cowling for those modders with the gears turning in their heads.
Here's the drive cage removed showing the front mounting dual radiator AIO mounting possibilities. The two rear-mounted 2 1/2 inch SSD mounts will be nice in this configuration. The screws on the drive cage maintain it's structure and on removal, the lightweight aluminum twisted a bit but replacing the drive bay was no issue.
Included with the Corsair SPEC-4 TG we found 4 zip ties and enough screws that we added a few to our black screw collection. Corsair tossed in Motherboard mounting screws, drive mounting screws. a ton of black fan mounting screws and 4 long fan mount screws. The included red led Fan also had for long fan mount screws for a total of 8 of those.