How loud can I 'safely' play my Dynaudio Focus 140

When speakers break from loudness, it usually is the amp's fault. Asking excessive power from the amp makes it clip which destroys...usually the tweeter goes first.

Are there any tell tale signs to look out for in order to avoid frying a tweeter or blowing a woofer out aside from obvious sonic distortions?

You can also see if the woofers are bottoming out against the surround on some models.

Loudness sounds just like distortion - so it is sometimes difficult to tell unless you are familiar with it - most people think their stereo is extremely loud because ultimately at some point it is so badly distorting that it simply sounds perceptively extremely loud - 99% of the time it is not actually anywhere near as loud as you would typically hear music played in a nightclub or concert (where pro gear pumps out clean undistorted sound at massive SPL's).

A very small speaker like this is not going to play loud (concert level) cleanly no matter what you do - unless you sit only 0.5 meter from them.

The Dynaudios have a bass/mid that has an unusually large 75 MM diameter voice coil (for a 5.5 inch cone)!! This is rare in home speakers - it is very large compared to what you normally get in consumer hi-fi - I would call this a "pro-driver". Most people with 8 inch cones and some with huge subwoofers will be using voice coils no bigger than 2 inch and some will be using voice coils of a mere inch in diameter - yes - you heard me correctly - a woofer with a voice coil no bigger than a tweeter!!!

What does this mean?

Chances are your little Dynaudios will outperform most bigger floorstanders in terms of clean loud sound and clear undistorted transients - this is an expensive driver! A large voice coil will be both extremely powerful (big motor) and it will dissipate heat much more effectively than a tiny 1 inch voice coil (due to much larger surface area). This means transients are not squashed by thermal compression. (Thermal compression is of huge importance as you go louder - 97% to 99% of what you throw at a woofer is converted to heat - so you have a little toaster in there - small thin wires getting really hot - this plays havoc with reponse as coil resitsance rises and will affect the effectiveness of a passive crosover to boot )

You can probably get about 100 db SPL continuous cleanly at 1 meter with transients around 110. This is impressive for a small speaker. You'll need 200 Watts - something like a Bryston 4B-SST or a Krell or something that fits your tastes. This speaker is not an easy load.

As long as you have the amp the support them (for LOUD, I would recommend at least 200WPC high current SS), then you'll be able to take them as loud as you could stand.

thank you all for such great input!

Upgrading my amp is my number one priority right now. If I really stretch it I think I can swing around 3k for a used amp. I was told Mcintosh, Bryston and Parasound make great amps in this price range so I think I'm going to see what comes up in the pre owned market.

It feels a little strange that I would be spending more on my amp than on my speakers but, it looks like I really shouldn't be skimping on the power source.

PS: that was a nice response Shadorne thanks

Mr. Shadorne should love this. Active pro monitors are spec'd for loudness, unlike your garden variety audiophile stuff.
Dynaudio BM-5 = 116 dB peak
Should be able to play at 100-105dB all day long.
GO ACTIVE!!