No, you can NOT use Spark CAB with traditional amps such as tube amp heads and like tube amp heads and similar models.
⚠ WARNING⚠
It's important to understand that the Spark CAB is not compatible with traditional amps like tube amp heads or similar models. This is due to the mismatch in power transfer, which could result in damage to both the Spark CAB and the amp connected to it.
Please refrain from attempting this setup to prevent any potential harm.