Mga master.. Currently, i am using 2 18"RCF subs, 4 15" low-mid, 8" piezo tweeters.. napansin ko na mejo mahina ang sound nang boses and parang may kulang. anong size ng speaker ang pede ko idagdag para maenhance yung volume ng boses? should i go for additional 8", 10" or 12"?
Thanks,
Can you post some details about your 15" low-mid transducer specially it's "claimed" frequency response? Your choice of high frequency drivers (tweeters) and horns will be greatly dependent on it, as well as the need for a "mid-range" transducer if necessary. Also, what type of enclosure are you using for the 15"'s, direct-radiating or bandpass, etc.?
The 8" on your piezo tweeters, I assume, is the width of the horn where it is attached to? Piezo tweeters are more often seen in consumer-type speakers, like those for residential use. Usually they are matched w/ small woofers to compliment each other, or in sometimes w/ a mid-range if the woofers are a bit bigger making it a 3-way system. Piezo tweeters do not reproduce good mid-to-high frequencies that well, in fact, they don't really reach the "mid-range" region. They are more efficient in the upper high frequencies. If you are looking for the good mid-to-high's quality audio specially for the vocal region, there is no way a 15" woofer coupled to a piezo tweeter can achieve this. This configuration will somewhat sound like there is a void or a "hole" in the vocal or mid-range region and would sound like only low's and high's, no mids, vocals sound "ipit"
playing music through this type is already not favorable, more so if you use it with a microphone for PA.
Piezo tweeters also have very low sensitivity/power handling capabilities. They get busted easily when pushed.
Based on your list, I would suggest you forego the piezo tweeters and use compression-type tweeters w/ CD horns (constant-directivity) instead. But don't buy one yet, you have to match it with your 15inch "low-mid"'s. Let's see their spec's first. Your choice of CD horns will also be dependent on how many speakers you plan to have.
When you match/balance your system, you have to consider which transducer is the "least efficient" or "least loud". This is important. You have to base the level of all the other transducers based on these weakest transducer. For example, for a system that has tweeters to be the least efficient, you will have to pull down the levels of all the other transducer to get a more balanced sound. There are those that have 8 subwoofers matched w/ a pair of passive fullrange speakers, this would sound tooooo bottom-heavy. The other way around, those that have 12 passive fullrange speakers w/ just a pair of subwoofer would sound tooooo thin, or lacks that bottom end. For a multi-amplified system, separate amp for high's, mid's, low's, etc. this balancing/matching is even more important. You also need an RTA (real-time analyser) for this
