IPA version 2 feature set:
- one to four channel input
- regulated +6 to +16V supply to connected microphones
- options for A23 or internal rechargeable Li-ion batteries
- +5-15V external battery jack or +12-48V phantom power via XLR or RJ45 output connector
- XLR-3-M (one or two channels), XLR-5-M (two to four channels), or RJ45 output (four-channel impedance balanced output, without internal battery)
- seven gain settings (three settings for four-channel version), with option for input attenuation with “two-wire” microphone input
- impedance- (one, two, or four channels) or electrically-balanced output options (mono and stereo only)
- optional high-efficiency polarization voltage circuit
- optional mid-side decoding/encoding circuit
The IPA flexible power microphone amplifier is an inline amplifier, phantom power adaptor, and battery power supply that supports a wide range of microphones, including low-voltage and “active” remote capsule microphone systems. The IPA also offers a low-noise transformer-input version for dynamic ribbon and moving-coil microphones. The IPA is available in mono, stereo, and four-channel input configurations, including options for impedance- or electrically-balanced output, and mid-side encoded/decoded outputs.
Input polarity and output configuration
The IPA is available in a wide range of input connectors and may be customized as required for each microphone type.
In its basic format, each channel of the IPA is a single-ended noninverting amplifier with an unbalanced output. The IPA can support inverting input by either routing the output to an inverted output pin (with the IPA connected to a balanced input via an impedance-balancing XLR output cable), or with the electrically-balanced output option, in which additional amplifier channels are used to invert the signal such that both noninverting and inverting outputs are present. The electrically-balanced output option is limited to mono and stereo versions. Four-channel versions are noninverting, unbalanced output (except the RJ45 output version, which is four channel impedance-balanced output), which may be connected to a standard microphone amplifier input via impedance-balancing XLR output cables.
For stereo unbalanced microphones, the IPA can generate either an impedance-balanced (standard) or electrically-balanced (optional) output. The electrically balanced output has nominal +6dB gain into a standard differential input microphone amplifier, and requires two amplifier channels for mono and four amplifier channels for stereo.
The IPA can support balanced interconnection for any mono or stereo microphone via independent noninverting and inverting inputs. Note that an IPA in this configuration is not a differential circuit (and thus will not cancel interference by itself), but when connected to a standard differential input microphone amplifier will complete a fully balanced circuit from microphone to amplifier. Balanced input requires two amplifier channels for mono and four amplifier channels for stereo.
Differential balanced input to unbalanced output can be supported by the addition of input (mono only) or output (mono or stereo) transformers; please inquire for compatible configurations.
It is also possible to invert polarity with the balanced input option, if required.