Improving the audio quality of camcorders by adding external microphones is the aim of serious hobbyists and professionals on a budget. In the case of Canon's Optura 10 and other comparable camcorders with standard 3.5mm microphone jacks, XLR adapters are necessary to accommodate most pro-level microphones. The type of adapter depends heavily on the type of microphone employed, and most allow "line level" inputs for connection of other audio sources such as sound mixers and music players in addition to microphones to your Optura 10.
Non-powered XLR Camcorder Adapters
Non-powered XLR adapters are the most inexpensive adapter type for the Optura 10, and will permit any standard dynamic-type microphone to be used. Dynamic microphones, unlike condenser mics, do not require external power or batteries, and the adapter simply acts as an impedance matching transformer (to increase the incoming volume level to camcorder usability) and 3.5mm to XLR jack adapter.
Powered XLR Camcorder Adapters
Powered XLR Camcorder adapters use batteries to supply what is known as "48 volt phantom power" for condenser microphones. Although some condenser mics are battery powered -- in which case a powered adapter is not needed -- many condensers will function only with an external power source. Generally more expensive than non-powered units, these XLR adapters include power on and off switches, allowing use of both dynamic and condenser microphones for the Optura 10 and comparable camcorders.
XLR Camcorder Adapters with Preamps
Both powered and non-powered XLR adapters for the Optura 10 are available with or without preamps. Since every microphone is different in its audio output level, preamps boost the microphone signal to usable volume levels when necessary for optimal results. These adapters use switches or rotary controls to facilitate signal boosting of weaker mics, reduce the signal of louder mics or bypass the preamp feature altogether if no boost or signal reduction is necessary. XLR adapters with preamps -- particularly those with phantom power -- are the most expensive adapters and may require an extra battery or two to provide preamp power in addition to phantom power.
Which XLR Adapter to Choose
The best approach to choosing an adapter for your Canon Optura is to decide which microphone is best for the particular application and choose your adapter to suit the mic. For maximum flexibility and if budget allows, go for a powered XLR adapter with built-in preamp. You'll be able to use or interchange any type of XLR mic to suit any circumstance and have control over all variables in power needs and output levels.
Tags: phantom power, Camcorder Adapters, Canon Optura, comparable camcorders, condenser microphones
