| Model | 458 | 356 | 254 |
| Input/output | 4 in 8 out | 3 in 6 out | 2 in 4 out |
| Input impedance | 10kΩ |
| Output impedance | 50Ω |
| Max input/output level | 19dBu |
| Sampling rate | 48kHz |
| Input/output gain | -40 ~ +12dB, (step 0.1 dB) |
| Input delay | 0ms ~ 1s, (step 21us) |
| Output delay | 0ms ~ 1s, (step 21us) |
| Input PEQ | Each channel has 4-band | Each channel has 7-band | Each channel has 7-band |
| Output PEQ | Each channel has 5-band | Each channel has 7-band | Each channel has 7-band |
| EQ Gain | -30 ~ +15dB, (step 0.1db) |
| EQ Type | PEQ, Low shelf (6db/12db), High shelf(6db/12db) |
| EQ Frequency | 19.7Hz ~ 21.9kHz |
| EQ Bandwidth | 0.017 ~ 4.750 OCT |
| Crossover frequency | 19.7Hz ~ 21.9kHz |
| Crossover slope | FLAT THRU, 12dB, 24dB, 36dB, 48dB |
| Crossover classification | Butterworth, Bessel, Linkwitz-Riley |
| Compressor threshold | -20dB ~ +20dB, (step 0.5 dBu) |
| Compressor ratio | 1.2, 1.5, 2, 3, 4, 6, 10, 20, 40, 128:1 |
| Attack time | 1 ~ 100ms, (step 1ms) |
| Release time | 50 ~ 1000ms, (step 50ms) |
| Dynamic range | 112dB A Weighting |
| CMMR | >40dB |
| Crosstalk | <-100dB |
| Distortion | 0.002% (1kHz,0dBu) |
| System preset | 10 appearances preset programs, 30 user programs. |
| Voltage | AC 90V~250V 50Hz-60Hz |
| Weight | 2.81kg | 2.8kg | 2.79kg |
| Size | 482mm x 164mm x 45mm |