Isobaric (meaning of the same weight or pressure) may refer to:*in thermodynamics, an isobaric process, for example one that's carried out at constant pressure; in mass spectrometry, ions with the same mass, for example isobaric peptides, namely peptides with the same molecular weight. isobaric speakers have a loudspeaker design where two drive units are mounted in tandem.… (More on Isobaric)