How many Db can 400 watt speakers get up to before blowing Also what should you be playing at on average for Parties etc?

The maximum sound pressure level (SPL) that a 400-watt speaker can produce before blowing depends on several factors, including the speaker's design, efficiency, and the impedance of the amplifier driving it. Generally speaking, a 400-watt speaker can produce an SPL of around 120 decibels (dB) before reaching its limits. However, some high-quality speakers may be capable of producing even higher SPLs.

For parties and other events, the optimal sound level will depend on the size of the venue and the number of people in attendance. A good rule of thumb is to keep the average SPL between 85 and 90 dB. This level is loud enough to be heard clearly throughout the venue but not so loud as to cause hearing damage or disrupt conversations.

It's important to note that the SPL produced by a speaker is not constant but varies depending on the frequency of the sound. Low frequencies (bass) require more power to produce the same SPL as high frequencies (treble). Therefore, it's important to use an amplifier that is powerful enough to drive the speakers without clipping or distorting the sound.

To prevent blowing your speakers, it's important to avoid overloading them with too much power. This can occur when the amplifier is turned up too high or when the speakers are driven with a signal that is too powerful. It's also important to ensure that the speakers are properly connected and that the impedance of the speakers matches the impedance of the amplifier.

By following these guidelines, you can help ensure that your speakers perform optimally and last for many years to come.