825EQ
Dual Mono Tube Mastering EQ
Mastering Precision with ELMA Stepped Controls
The 825EQ is equipped exclusively with ELMA stepped switches, providing the consistency and recall accuracy required for mastering workflows. Each adjustment is deliberate, repeatable, and designed to deliver subtle yet impactful tonal changes.
Inductors and Tubes for Musical Tone Shaping
At the heart of the 825EQ lies a carefully tuned analog topology where inductors and tubes interact to create harmonically rich, three-dimensional sound. These elements introduce gentle saturation and depth, enhancing clarity without sacrificing musicality.
Transformer-Balanced Signal Integrity
UTM transformer-balanced inputs and outputs, combined with three audio transformers per channel, preserve signal purity while adding a refined analog texture. This design ensures excellent headroom, low noise, and faithful translation across playback systems.
Tube Warmth with Flexible Voicing
Each channel uses three ECC88 tubes, with support for alternative 6N23P or 6N1P valves. This flexibility allows engineers to tailor the tonal character to suit different material, from lush vocals to vibrant, dynamic instruments.
Stable Power for Critical Audio Work
A linear internal power supply delivers clean, stable energy to all components, minimizing noise and ensuring dependable performance during critical mastering sessions.
Specifications
| Stepped Manipulators | All stepped, 24-pole ELMA switches |
| Boost / Cut Range | ±6 dB or ±12 dB (specified by order) |
| Hard Wire Bypass | No (signal still passes through transformers and tubes) |
| Q Factor | Variable (proportional), 0.3 – 6 |
| Audio Transformers | UTM transformers on input and output |
| Input Impedance Balanced |
XLR, 10 kΩ, UTM2546 |
| Interstage Transformers | Yes, UTM3525 (gapped) |
| Output Impedance Balanced |
XLR, 600 Ω, UTM3525 |
| Operating Level | +4 dBu |
| Maximum Input Level | +22 dBu |
| Maximum Output Level | +26 dBu |
| Dynamic Range | >112 dB (@ 1 kHz, +24 dBu) |
| Maximum Gain | 0 dB; ±12 dB per band |
| Frequency Response | 10 Hz – 50 kHz ±0.4 dB |
| Signal-to-Noise Ratio | 102 dB @ +24 dBu, 1 kHz |
| THD+N | <0.049% @ +24 dBu, 1 kHz |
| Crosstalk | 96 dB @ +4 dBu, 1 kHz |
| Voltage | 115 / 230 V AC, 50–60 Hz |
| Power Consumption | 45 W |
| Power Supply | Internal, linear |
| Dimensions | 70 × 40 × 30 cm |
| Shipping Weight | 12 kg |
| Tube Complement | 6 × ECC88 / E88CC / 6N23P / 6N1P-EV |