I recently purchased the above amp for my truck and after using it for a few weeks decided to go with the 4 channel for my speaker and use this for a sony 10 inch sub I have. Previously this sub was hooked up to a kenwood 500 watt mono amp and it thumped. I really was impressed with this amp handling my polk db6501 speakers in the front so I had high hopes for it bridged for a sub. Its not very impressive in this capacity, has anyone else experienced anything similar or have suggestions? I have the gain turned almost all the way up.