StraightSix

I would suggest you should exercise caution with those cabs - most cab wattage ratings are based on thermal limits of the speaker voice coils. This means that they will overheat at approximately the RMS rating but many bass speakers will hit their excursion (movement) limits well before that and be damaged. As to similar volume levels to your 412, you will have to compare them to know for sure.

Maximum of 750 watts RMS running at 4 ohms.

[quote name='Hamster' timestamp='1342047616' post='1728886'] I'll have browse through the invision forums to see if there is: 1. the demand for a tweak; 2. any hope of an invision code monkey producing it, which I think in real terms probably means 'don't hold your breath' [/quote] It would be good - even TB does it

Bought a DHA pedal from Magnolia which was supposed to include the power supply - "I'll also chuck in a 12v power supply to power the thing" was his wording in the advert. He sent the wrong power supply and now is refusing to even answer my queries via PM. I know he has seen my (very polite) PMs on this as he has visited this board since I began trying to contact him. I'm not a happy man. Be warned.

Yes - live and loud is where they really shine

[quote name='JTUK' timestamp='1338372852' post='1673361'] Because that is the implication.... [/quote] No, that is your implication. Why do you think the long-standing manufacturers/designers will have more knowledge...?

[quote name='JTUK' timestamp='1338371447' post='1673334'] But to follow that on logically, you have to put their opnions and thoughts below the producers who sell volumes of the stuff. [/quote] Why...?

Bit difficult to answer without more info but this is a useful guide to gain structure: [url="http://www.soundonsound.com/sos/apr98/articles/gainstructure.html"]http://www.soundonsound.com/sos/apr98/articles/gainstructure.html[/url]

I thought you said you tried an XLR-XLR cable and it was quiet so I guessed you already had one...? Also, IMHO an XLR-Jack cable is not a 'standard' mic cable - almost all modern decent mics should be low impedance so XLR-XLR cable.

The XLR-XLR cable is balanced as EH says but the XLR-Jack cable is unbalanced so it is introducing noise. There's your answer. If you have a balanced output, you should always use a balanced input where possible.

Here's a description from Bill Fitzmaurice I picked up which may be easier to understand: Two reasons for vertical stacking. One, you can hear them better. Two, the audience can hear them better. That has to do with two other facts. First, the all important midrange frequencies travel in relatively straight lines. The further the speakers are below your ear level the more difficult it is to hear them. Second, the angles of dispersion are inversely proportional to the width and height of the source. A low wide source has narrow dispersion on the horizontal plane, wide dispersion on the vertical plane, and that's the precise opposite of what's desired. Wide horizontal dispersion, for the benefit of the audience, and narrow vertical dispersion, so as not to waste power scerenading spiders on the ceiling and mites on the floor, is what you want, and you get that from a source that is narrow and high.

[quote name='chris_b' timestamp='1337430946' post='1659808'] 1. We keep being told this, in vague and subjective terms, but what are the facts? How much of a real problem is this? I'm not talking about Cinema or PA applications or lab tests but the real world of noisy "rock and roll". [/quote] More info here: [url="http://barefacedbass.com/technical-information/understanding-sound-dispersion.htm"]http://barefacedbass.com/technical-information/understanding-sound-dispersion.htm[/url]

Me too but remember that AVG (like some other AV programs) uses Heuristic analysis amongst other things to detect threats. Heuristics rely on the program looking for possible threats which may or may not be actual threats.