Who said anything about Audix? I thought we were comparing grapefruits and bananas.
Both have an outside layer, removed for consumption
Both are yellow
Both come in bunches
Both are available at your local Pick and Save
Now the mics
Both pick up sound (one through pressure and one through magnetiam and eledtricity)
Both are cheap
Both are found in or around people trying to record music
Both are available at your local Guitar Center
Condenser:About Condenser (Capacitor) Microphones
These mics work on the principle of electrostatic transduction. The capsule assembly consists of a fixed back plate and a movable front plate (diaphram). Impinging sound changes the distance between the plates, hence the capacitive charge. This charge is converted to a voltage, which is amplified by an internal preamp. The output of a condenser mic is proportional to the amplitude of it's diaphram motion (as opposed to diaphram velocity in dynamic mics). Some condenser mics utilize tube electronics (Neumann M49, U47, U67, AKG Cl 2) or RF transduction principles (Sennheiser MKH series).
All condenser mics require powering for their internal preamps and to provide a polarizing voltage to the capsule assembly. This is typically done with "phantom" power (also referred to as P48) which provides 48 volts DC through the the conductors on pins 2 and 3 of the mic cable (pin 1 conductor provides the ground return path). Phantom powering is normally provided by the console, but can be done with outboard remote supplies. Any shorts in the mic cable conductors can result in noises, hums or lack of usable output from the mic.
Condenser mics (particularly those with small diaphrams) generally have extended high frequency bandwidth (up to and beyond 20 kHz. in some cases) and a flatter, smoother frequency response within band than dynamics mics. This extended high end response makes these mics ideal for sources with significant high frequency energy such as cymbals and hi-hats.
Condenser mics are typically more sensitive and offer higher output levels than dynamic mics. In most cases they also have lower self-noise and higher sensitivity.
Condenser mics generally overload more easily than dynamics (particularly older FET designs like the Neumann U87 and the original AKG C414); this is due mostly to their internal active electronics. Care must be taken when using condenser mics close to percussive or high SPL sources, unless this type of distortion is being deliberately sought. It is also possible to 'bottom out' the diaphram on some models, which can produce a very nasty, unmusical sound.
Condenser mics are less rugged (easier to damage) than dynamics. They are also more expensive to fix or replace (
the TLM170 now retails for close to $3k). Vintage tube condenser mics in pristine condition are very expensive and are prized for a variety of recording applications, especially lead vocals.
Current research and development is centered primarily on improving FET or solid-state condenser designs. Improvements include: lower noise specs, higher dynamic range capability and very smooth on- and off-axis frequency response curves. Good examples of these new designs would include: Bruel and Kjaer 4000 series, Schoeps Colette series and the Sennheiser MKH series mics. At the same time, great interest has been renewed in older, tube circuit designs such as
the Neumann M49, M50, U47, U67 and AKG C12. Many manufacturers are reissuing older designs (AKG offers the 'vintage reissue' Cl2VR) or introducing new tube mics such as the Sony 800G and Neumann TLM149. Neumann recently reissued a limited number of new U67 tube mics based on the original design for $5000. each!
Microphone selection and application are very much matters of individual taste. The "flattest" or "cleanest" mic may not always be the best choice. For example, small diaphram condensers are usually not the first choice for miking kick drums. On the other hand, the more common choices for this application (Sennheiser 421, Electro Voice RE20, AKG D112, etc.) are not particularly flat or extended in terms of their frequency responses. For some applications, strong frequency response colorations and other non-linearities may provide the desired sonic character. Hands on experience with various miking applications and a thorough knowledge of available mic hardware will provide the best answers to the common question: "How do I mic a ___________?" Reading interviews with top producer/engineers (or discussing these issues on-line at the rec.audio.pro newsgroup) should also provide some insight and ideas. Of course, your professor probably also has some useful tips for you to consider.
Professional condenser mics are generally more expensive than dynamics. They range from around $350. (Shure SM81) to close to $10k. Vintage tube mics command large $$ on the used equipment market. An AKG C12 in mint condition now sells for approx. $7.5k; a Neumann U47 with an original VF-14 tube goes for about $6.5k. A used U67 represents a good bargain at around $3.5k!
Dynamic: Electrical generators create current by passing coils of conductive wire past magnets--this principle is known as induction. A dynamic microphone works on the same principle. Usually a coil of thing wire called a voice coil is attached to the diaphragm The wire is coiled around a fixed magnet separated from it by a very small gap. As sound waves hit the diaphragm it causes the coil to move in the magnetic field of the magnet, thereby producing fluctuation in the current moving through the coil.
Dynamic mics are best used for loud sounds or sound that may contain sharp transients. The are not as good for minute detailed sounds and usually do not have the high frequency response of a condenser microphone. Also, they are usually cheaper and more robust than condenser mics
And I like grapefruit while I don't care for the B1. However, a grapefruit has no B1 while a banana does
Enda Story!
Dynamic: