Hay Steve. Thanks for the advice. However, think I already checked out the DB 15's and wasn't that impressed. The RCF 15 sounded nice however, it didn't quite get the very bottom end. The RCF was quite a bit more cash but, having heard one, I can see why. Also, asked Tom about the PROL stuff but, he steered me away from that, and said that the RCF stuff is better. I believe him as when it comes to any kind of speaker/monitor, Tom really knows his stuff. For example, was bout to purchase the RCF 15 but, tom stopped me and said, "before you do, have a listen to this." He plugged in a MACKIE 18 and boy, what a difference. It really handled the very bottom, a lot better. The bass dropped off on the bottom D of the backing track that I was playing on the 15 where as on the 18, it sustained beautifully. He didn't have an RCF 18 around in the shop at the time so, couldn't check that out. Love that about the guys down at Absolute Music. They really want to make sure that you have checked out all of the options before purchase. Also, it was just after 5.30 in the evening so technically, the shop should have been closed. That's traffic for ya. so, he couldn't get hold of the 18. He's getting one sent over from the warehouse so, will be able to check that out. Mind you, any 15 is like that. If you want that groul or, chest thump then, you really do need to purchase an 18 inch sub. Also, the RCF 15 and 18's have a digital amp so, they are quite a bit lighter. the 15 is 34 kilos and the 18 is 40 kilos. Am thinking that I will probably only need one 18 inch sub for most of the stuff that we are doing currently. Specifications are below, starting with the 15: RCF ART 905-AS 1000 Watt Digipro digital amplifier 131 dB max spl 15" woofer, high power 3" copper coil Xover 80-120 Hz switch, phase switch Mono / Stereo combo xlr / jack input PFC power factor correction Acoustical Specifications Frequency Response -3 dB: 40 Hz ÷ 120 kHz Max SPL: 131 dB Woofer: 15", 3" v.c. Input/Output Section Input signal: bal / unbal Input connectors: Stereo combo xlr-jak Output connectors: Stereo xlr Input sensitivity: -2 dBu / +4 dBu Processor Section Crossover frequencies: 80 - 120 Hz Protections: Thermal, rms Limiter: Limiter Controls: Volume, phase, xover Amplifier Specifications Total power: 1000 W Low frequencies: 1000 W Cooling: Convection / forced Connections: VDE connector in / out Cabinet Cabinet Material: Balitc birch Handles: 2 on side Pole Mount/Cap: Yes Colour: Black Physical Specifications Height: 600 / 23.62 mm/inch Width: 445 / 17.51 mm/inch Depth: 600 / 23.62 mm/inch Net Weight: 34 / 74.95 kg/lbs RCF SUB 718-AS 18 inch Bandpass Active Subwoofer 700 Watt digital amplification 132 dB max spl 18" High power woofer, 4" voice coil Xover selector, phase switch and high pass outputs Electronic equalization, soft limiter and protection Stereo Xlr/Jack combo input, Stereo Xlr signal output Acoustical Specifications Frequency Response -3 dB: 40 Hz ÷ Xover point kHz Max SPL: 132 dB Woofer: 18", 4" voice coil Input/Output Section Input connectors: Combo stereo Jack-XLR male Output connectors: Combo stereo XLR female Processor Section Crossover frequencies: 80 - 120 Hz Protections: Limiter Limiter: Fast limiter, rms limiter Controls: Volume, phase, crossover switches Amplifier Specifications Total power: 1000 W Cabinet Cabinet Material: Baltic Birch Handles: 2 on sides Pole Mount/Cap: yes Colour: Black Physical Specifications Height: 650/25.5 mm/inch Width: 504/19.84 mm/inch Depth: 650/25.5 mm/inch Net Weight: 40.4/89.06 kg/lbs Phil continues, you will note from the specks that the 18 is 132 dB max spl so, it should sound slightly louder. Will be interesting to see if it sounds as good as the MACKIE equivalent which is 10 kilos heavier but, 133 dB max spl Regards, Phil Muir Accessibility Training Telephone: US (615) 713-2021 UK +44-1747-821-794 Mobile: UK +44-7968-136-246 E-mail: info@xxxxxxxxxxxxxxxxxxxxxxxxxxx URL: http://www.accessibilitytraining.co.uk/