| HARMONIE® | light | quadro | octav |
| Order No. | 974004.6 | 974000.5 | 974008.7 |
| PLUS option (AES3 interface) | 974012.6 | 974009.5 | |
| PC interface | PCMCIA | PCMCIA | Cardbus |
| Measurement channels | 2 | 4 | 8 |
| Socket | LEMO7 | LEMO7 | LEMO-Triax |
| Resolution | 16-bit signal 20-bit level | 16-bit signal 20-bit level | 16-bit |
| Sensor power supply | ICP 2 mA ± 14 V 200 V | ICP 2 mA ± 14 V 200 V | ICP 2 mA |
| Coupling/filters | DC, AC, 10 Hz HP, 2 kHz LP | DC, AC, 10 Hz HP, 2 kHz LP | DC, AC, 10 Hz HP |
| Sample rate | (44.1kHz with PLUS option) 48.0 kHz 51.2 kHz 96.0 kHz 102.4 kHz | (44.1kHz with PLUS option) 48.0 kHz 51.2 kHz 96.0 kHz 102.4 kHz | 48.0 kHz 51.2 kHz |
| Accuracy according to IEC 651/804 and IEC 61672-1 | Class 1 | Class 1 | Class 1 |
| Overload detection | yes | yes | yes |
| THD + Noise | > 80 dB | > 80 dB | > 76 dB |
| Cross-talk attenuation | > 80 dB | > 80 dB | > 76 dB |
| | | |
| Output channels | 2 | 4 (2 at 96.0 kHz or 102.4 kHz) | 4 |
| Socket | 1x 6.3 mm jack | 2x 6.3 mm jack | 2x 6.3 mm jack |
| | | |
| Auxiliary channels | 2x tacho 5x slow | 2x tacho 5x slow | 2x tacho 2x digital I/O |
| Socket | LEMO8 | LEMO8 | LEMO4 |
| | | |
| AES inputs (PLUS option) | 2 (LEMO5) | 2 (LEMO5) | |
| AES outputs (PLUS option) | 2 (LEMO5) | 2 (LEMO5) | |
| Synchronization (PLUS option) | With GPS receiver at 51.2 kHz or 102.4 kHz | With GPS receiver at 51.2 kHz or 102.4 kHz | — |