The selection of the Album) frequency is one of the most important elements in the design of the speaker system. Frequencies below this number are sent to the woofer and those above this are sent to the tweeter. There will always be an overlap in the frequency response curves of the woofer and tweeter, meaning that frequencies in this range could just as well be sent to either the woofer or tweeter with presumably equal results.
The crossover frequency could theoretically be placed anywhere in this range. But in reality, there is always one sweet spot within that frequency range, and if you place the crossover frequency there you will have the most natural sound. How do you find that sweet spot? You have to experiment. You have to try different crossover frequencies and compare the sound. The crossover frequency is baked deep into the crossover design.
As you might guess by now, this is not a problem in active bi-amp systems! The crossover frequency of an active crossover is set by the values a handful of precision resistors which are generally mounted on a low cost and easily swappable module.
To change the crossover frequency, you only need to pull out the XO module and replace it with one set for the new frequency. Any one of the Album) evils should be enough to convince anyone to dump their passive crossovers.
But all of these evils taken together make an overwhelming case against passive crossovers and in favor of active Bi-Amping. Active Bi-Amping gives you other advantages that are not in any way available with the old style passive crossovers.
The components used to build an active crossover can be of the utmost precision and quality, optimized to produce the cleanest possible audio. The highest quality 0. Active Bi-Amping also gives you the flexibility to select the most optimum power amplifiers for the low, mid and high channels.
For example, some people advocate using high wattage solid state amplifiers to drive the woofer channels, and a cleaner valve amp for the tweeter channels. There is much room for experimentation here. Bi-Amping gives you this flexibility to find the best configuration to obtain the best possible sound.
Active Bi-Amping is simple, low cost, and gives you a vastly higher quality sound compared to the old passive crossovers. But I know there will be skeptics.
Comments welcome! I must wholeheartedly concur with all of the above. Having purchased two XkitzK active crossovers which took the place of passive x-over system. In my quad amped system. Are You Passive Or Active? - Vulvulator - Obscenario (CD the control I have now is also a great improvement. I absolutely agree with everything said. One thing not mentioned is about the speed of the transient responce, wich is much different than freequency responce, it is also greatly improved.
The speed that the freequency can change is a much more smoother, and faster transition also. Thank you for your great insight on this, as I have been wondering why people dont bi, tri, or quad amp their systems, this is what I have done, so that I can use class D amplification at high levels for sub freequencies below 32Hz because it is only vibration at that point the earth to ground movment sets in, and stereo does not even appear at that level, also tbe amplifiers dont have to go through all the audio freequencies, making Are You Passive Or Active?
- Vulvulator - Obscenario (CD higher power, using less, and then you can experiment wit different type amplifiers, at different freequency ranges, or a nice mixture of single ended triode, for mid freequencies, being the most tough to reproduce. Thankyou for this, as it is verry i formative, there is more I would like to say but may get too complicated, and that is a problem I have. Sincerely Eric Mootz ericarlenmootz gmail. Cart 0. Have you ever wondered why high end speakers cost what they do?
So the next question to ask is how do these speakers produce such high quality sound? Here are just a few of the many reasons: Large and Pricey Components The components required to build a really decent crossover are not small and not cheap! Component Tolerances Tight component value tolerances are difficult to attain on these large inductors and capacitors.
Crossover Characteristics Change with Temperature The capacitor and inductor values drift with temperature. Tricky Load The complex electrical interactions between the caps and inductors and the speaker driver itself create a very difficult load for the amplifier to handle.
Back EMF Distortion Back EMF, or back electro-motive force, is the voltage created by the speaker winding when the momentum of the cone causes the winding to continue moving relative to the speaker magnet. Active bi-amp systems are not in any way susceptible to back EMF distortion.
Intermodulation Distortion The combination of the speaker drivers and the caps and inductors of the passive crossover all form a single circuit that is charged with producing sound over the entire audible range. Loss of Damping The caps and inductors placed in the circuit between the amplifier and the speaker coil cause a loss of damping, meaning that the amplifier is more isolated from the driver and has weaker control over the motion of the loudspeaker cones. Driver Sensitivity Matching All speaker drivers have different levels of sensitivity, meaning that a given signal voltage applied to the terminals will produce a different Sound Pressure Level, or SPL.
Crossover Frequency Baked Into the Design The selection of the crossover frequency is one of the most important elements in the design of the speaker system.
It is also easier to match the amplifier power outputs to each driver, and to include optimised protection circuitry. The disadvantage is Are You Passive Or Active? - Vulvulator - Obscenario (CD a good active design is expensive, and a bad one is a complete waste of space! You are here Home Sound Advice Q. What's the difference between active and passive monitors?
Previous article Next article. New forum posts Re: "When one looks for a mixing engineer Recent topics "When one looks for a mixing engineer Login You may login with either your assigned username or your e-mail address. In fact, there are times when it can come in handy.
Read on to learn how to form the active and passive voiceswhen using the passive voice is a good idea, and how to avoid confusing it with similar forms. While tense is all about time references, voice describes whether the grammatical subject of a clause performs or receives the action of the verb. In a passive voice construction, the grammatical subject of the clause receives the action of the verb. So, the ball from the above sentence, which is receiving the action, becomes the subject.
A passive voice construction can even drop him from the sentence entirely: The ball was kicked. That said, there are times when the passive voice does a better job of presenting an idea, especially in certain formal, professional, and legal discussions. Here are three common uses of the passive voice:. The passive voice emphasizes the stolen item and the action of theft.
Who places the rat into the maze? Scientists, duh. Therefore, passive voice. How many people can remember off the top of their heads who swears in presidents?
Clearly the occasion of swearing in the commander in chief is the thing to emphasize here. In each of the above contexts, the action itself—or the person or thing receiving the action—is the part that matters. That means the performer of the action can appear in a prepositional phrase or be absent from the sentence altogether, Are You Passive Or Active? - Vulvulator - Obscenario (CD. The above examples show some formal uses of the passive voice, but some writers take advantage of the shift in emphasis it provides for other reasons.
The classic example:. Who made them? Is anyone taking responsibility?
Flux Of Pink Indians - Tribal Anti-War (Cassette), Geen Eyes - Garnet Rogers - The Outside Track (CD, Album), Mankind In Retreat - Realitys Despair - Evil Intent (CDr, Album), Night Cruising (Plasma Mix), White Light, White Heat - David Bowie - A London Triology 3 (CD), Tha Alkaholiks - Coast II Coast (CD, Album), He Was Born The Holy Child - Richard Clayderman - Christmas Reveries (Vinyl, LP, Album), I Lovely Cosmonaut - Monstrance - Monstrance (CD, Album), Horse - Tiger MCs - Piston-Pawed (CDr)