OK I've set up a hifi in 2 canteen rooms. Rooms are rectangular and measure approx 17m by 6m. I've placed two speakers in each room at diagonally opposite corners. The source is a PC feeding into a mixer feeding into a Yamaha amp and then onto TDL nucleus speakers. The amp has an A and B speaker selector which are both selected to power the four speakers. The speaker cable is 79 strand and some of the cables are over 25 m in length. The top of thespeakers are positioned about 10 cm from the ceiling (in the corner) and are tilted downwards - raised at rear by a block of wood about 3 cm high. They are on an MDF platform. Basically the sound is very bass heavy. I've had to move the bass knob on the amp to the quarter to position and the treble to the quarter past - plus move the bass frequencies down on the mixer's equaliser and the treble frequencies up. The amp's volume control is in the 12 oclock position. I'm still not happy with the sound. It does not help that there is no mono option on the amp which would at least ensure each speaker is creating identical sound. Thes are the specs of the amp and speakers - http://www.richersounds.co.uk/index...tl.php&p=201818 http://www.richersounds.co.uk/index...tl.php&p=201554 I suspect I shall have to buy another amp and another 2 pairs of speakers - I know this will not cure the bass issue but may allow a volume reduction as there will be increased 'coverage'. Anyway I'd like peoples opinions. Any ideas?