Are the cables you provide with AvalonMiner and AvalonMiner Controller long enough?

Yes, one AvalonMiner Controller connects to one micro-usb (provided by the AvalonMiner Controller package) that is long enough to reach the first AUC3 (usb convertor provided with each AvalonMiner 721 product), which has a short AUC I2C cable (provided by AvalonMiner 721 product) that connects to the first miner, and then you chain using the AUC I2C cable from miner to miner up to five miners. It should be long enough for most setups.