ME-250DX
Stereo Mastering EQ
The ME-250DX by Z&H Designs is a mastering-grade tribute to the legendary Sontec MEP-250, refined for modern precision and recallability. Featuring fully stepped controls, over 100 frequency points, and ultra-fine 0.5 dB increments, it delivers transparent, spacious equalization with surgical accuracy. Powered by ±28V all-discrete op-amps and independent 56V linear power supplies per channel, the ME-250DX achieves exceptional headroom, ultra-low distortion, and pristine resolution. An onboard analog Mid/Side processor expands workflow flexibility, while meticulous stereo matching under 1% ensures mastering-level consistency. This is classic analog tone elevated to uncompromising mastering standards.
Sontec Heritage, Mastering Precision
ME-250DX builds upon the legendary Sontec MEP-250 topology, refined with fully stepped controls for absolute recallability. With over 100 selectable frequency points and 0.5 dB gain increments, it delivers surgical accuracy while maintaining the spacious, natural musicality Sontec designs are known for.
All-Discrete High-Voltage Circuitry
Equipped with 12 high-performance discrete op-amps running at ±28V and powered by independent 56V linear supplies per channel, the ME-250DX achieves exceptional slew rate, massive headroom, and distortion below 0.001%. Resolution remains intact even at aggressive settings.
Integrated Mid/Side Processing
A premium analog M/S encoder/decoder is built directly into the unit, enabling precise mid and side equalization. Channels can be independently bypassed in both Left/Right and M/S modes for maximum mastering flexibility.
Mastering-Grade Stereo Matching
Each unit is hand-calibrated and stereo-matched to within less than 1% accuracy. When measured, both channels track nearly identically, ensuring reliable imaging and tonal balance for critical mastering work.
Effective, Musical Control
Five true parallel bands per channel, stepped Q settings, shelf options on high and low bands, and selectable ±5 dB or ±10 dB gain ranges allow both subtle shaping and bold tonal sculpting without sounding processed.
FEATURES
- All-discrete analog circuit design
- Fully stepped controls for mastering recall
- Over 100 selectable frequency points
- 0.5 dB gain increments in ±5 dB mode
- 5 true parallel bands per channel
- Iconic Sontec-style smooth response curve
- Onboard full analog Mid/Side processor
- Stereo-matched to <1% accuracy
- ±28V discrete op-amps with >30V/µs slew rate
- Independent 56V linear power supply per channel
- Ultra-low distortion (<0.001%)
- Noise floor below -95 dBu
- Custom configuration options available
- Handcrafted and verified by professional engineers
- 5-year warranty and global service support
Specifications
| Frequency Range | 15 Hz – 25 kHz |
| SNR (Channels Off) | Left: -98.3 dBu Right: -99.1 dBu |
| SNR (Channels On *1) | Left: -96.8 dBu Right: -97.9 dBu |
| SNR (Channels On *2) | Left: -96.2 dBu Right: -96.9 dBu |
| Form Factor | 2 channels, 5 bands fully parametric |
| Low Frequency (LF) | 24 Hz – 790 Hz Q: 0.67 – 4 or shelf ±10 dB boost/cut |
| Low-Mid Frequency (LMF) | 30 Hz – 8.1 kHz Q: 0.67 – 4 ±10 dB boost/cut |
| Mid Frequency (MF) | 220 Hz – 8.1 kHz Q: 0.67 – 4 ±10 dB boost/cut |
| High-Mid Frequency (HMF) | 490 Hz – 25 kHz Q: 0.67 – 4 ±10 dB boost/cut |
| High Frequency (HF) | 1 kHz – 25 kHz Q: 0.67 – 4 or shelf ±10 dB boost/cut |
| Distortion (Channels Off) | 0.0005% |
| Distortion (Channels On) | 0.0013% (20 Hz – 20 kHz) |
| Chassis Size (H × W × D) | 133 mm × 440 mm × 282 mm |
| Panel Size (H × W) | 133 mm × 483 mm |
| Voltage Selector | 110 V / 220 V |
