The microphone operates at lower voltages, but with slightly decreased headroom and sensitivity. Bias is a dc voltage (1.5 - 9 volts typically) that is provided on a single conductor. To install or replace the battery, proceed as follows: Use the supplied Y-splitter cable to connect the VP88 to two inputs of a mixer or console. One cartridge (Mid) faces forward to capture on-axis sound in a cardioid pattern. Carefully slide the lower handle away from the grille, exposing the battery compartment. M (Medium): Side level is 1.9 dB lower than Mid level. However, the degree of stereo effect may be compromised in narrow performing areas. The mixer sends voltage up the same wires that the audio is traveling down. The Mid and Side outputs can be processed through a sum-and-difference matrix to produce Left and Right stereo signals as follows: An 1:1 ratio of Mid to Side produces stereo signals identical to those obtained with Stereo Output switch set to High (H). A second (mono) microphone can be used for interviewing or close miking. I needed to power one of my condenser microphones for my remote recording sessions. Phantom Power + USB Charger + Microphone Cable for price of a cable! The JFET acts as an impedance converter which is a necessity in any microphone design that uses a condenser element. Phantom requires a balanced circuit in which XLR pins 2 and 3 carry the same dc voltage relative to pin 1. Phantom Power The VP88 can operate on an internal 6V battery or phantom power from any microphone mixer or console providing 9 to 52 Vdc, or by a phantom power supply such as the Shure PS1A. The CE Declaration of Conformity can be obtained from: www.shure.com/europe/compliance, Headquarters Europe, Middle East & Africa, Time-coherent, Mid-Side (M-S) design for optimal stereo imaging, Built-in stereo matrix for direct control of the stereo spread; direct M-S outputs provided, Low noise and distortion, wide dynamic range, Switch-selectable, low-frequency roll-off (12 dB/octave below 80 Hz) for reduced pickup of ambient noise and stand vibration, Phantom power or 6V camera battery with LED power indicator, Internal shock mount for reduced stand vibration and handling noise, Windscreen, swivel mount adapter, and Y-cable included. If the microphone or cable is improperly wired, these resistors limit the flow of current to the microphone and thereby prevent damage to the phantom supply circuit. Once again: phantom and bias are not interchangeable! Also, the JFET output provides a low source impedance <1,000 ohms> to feed the microphone preamplifier. November 25, 2020, Linda Hansen | It is called phantom power because there is no obvious external power supply for the condenser mic; the power supply is invisible and therefore a "phantom." Consult the manufacturer's data sheet to find out the exact wiring configuration. Brass and nickel-plated aluminum construction with stainless steel grille. Will Phantom Power Damage my Dynamic Mics? The other cartridge (Side) is bi-directional, capturing sound from either side. Use the removable foam windscreen for high intensity wind and speaking conditions. MS Output Mode: In MS mode, the VP88’s internal stereo matrix is bypassed. When the VP88 is set for stereo mode operation (H, M, or L), the left and right signals should remain fully separated and kept at equal levels to maintain a balanced stereo effect. However, an unbalanced dynamic microphone will be affected. If necessary, remove the old battery. The capacitor must have enough capacitance to pass the audio signal without degradation. Phantom power is used with condenser microphones. The use of other than shielded (screened) cable types may degrade EMC performance. The VP88 uses a 6V cylindrical battery commonly used in cameras. A balanced dynamic microphone is not affected by phantom power. Average battery life depends on the type of battery: typically 70 hours for silver oxide/lithium and 40 hours for alkaline. The exact value depends upon the electronic characteristics of the microphone circuit and must be calculated for each situation. L (Low): Side level 6.0 dB lower than Mid level. Finished in satin black vinyl enamel, 9–52 V DC phantom power (IEC-61938), 1.3 mAoutput, 2.6 mAtotal, Maximum External Voltage applied to Pins 2 through 5 with respect to Pin 1: ± 75 Vdc, S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted. On the other hand, dynamic mics—the ubiquitous Shure SM57 and SM58 mics, for example—do not require power. Disconnect the microphone cable and unscrew the VP88 lower handle. Positive pressure applied from any direction to the Mid cartridge or from the left to the Side cartridge in the MS mode, or applied from the front in the Stereo mode produces positive voltage on pin 2 relative to pin 3 (Mid/Left) and pin 4 relative to pin 5 (Side/Right). The adjacent LED will flash indicating at least five hours of useful battery life, and if no flashing is observed the battery should be replaced. Note: Testing is based on the use of supplied and recommended cable types. The integrated pop filter provides reduction of breath and wind sound. If a dynamic microphone must to be connected to an input with bias voltage, a blocking capacitor must be used. Not true! Phantom power is a dc voltage (11 - 48 volts) which powers the preamplifier of a condenser microphone.