I have a Laney GC120 combo amp (14 years and still going strong!) and the one thing i noticed that i never liked about it was the low bass response due to it being an open back combo. I was thinking about buying/building a closed back cabinet and using a Y splitter on the speaker output jack (obviously balancing the impedance to stay above the 4 ohm limit). I was wondering if anyone else has this amp and if they ever thought about or did this type of mod? If so, how were your results?