Bettermaker Stereo Passive Equaliser (SPE)

The Bettermaker Stereo Passive Equaliser (SPE) is a mastering-grade digitally controlled analogue equaliser that delivers the legendary sound of passive EQ circuits with the modern convenience of total recall and DAW integration. Featuring a 100% analogue signal path and digitally controlled parameters, the SPE is designed for engineers who demand classic tone shaping and precise, repeatable results.

At the core of the SPE lies matched capacitors and inductors that shape its rich, musical EQ curves. With the press of a button or movement of a mouse, users can recall complex settings instantly, automate parameters directly from their DAW, and manage up to 32 snapshots - making the SPE ideal for mastering workflows with multiple tracks or clients.

Digital Control with Analogue Warmth

All user interaction and parameter management are handled in the digital domain via a 32-bit microcontroller, while the audio path remains fully analogue. This architecture allows for:

Instant reset and full parameter recall
Precise and repeatable adjustments
Stereo-linked operation with single-point control
DAW automation of all settings via USB and dedicated plugin

With the included plugin, users can view and control EQ settings graphically, engage a digital high-pass filter (24 dB/oct), and analyse audio using the built-in FFT analyser. The plugin provides a hybrid workflow for digital editing with analogue sonics.

EQ Design and Frequency Bands:

Low boost/cut frequencies: 20, 30, 60, 100 Hz
High boost frequencies: 3, 4, 5, 6, 8, 10, 12, 16, 20, 28 kHz
High cut frequencies: 5, 10, 20 kHz
Maximum Low Boost: 15 dB @ 100 Hz
Maximum Low Cut: 16 dB @ 100 Hz
Maximum High Boost: 18 dB (all frequencies)
Control Resolution: 101 steps (Lo Boost, Lo Cut, Hi Boost, Bandwidth), 34 steps (Hi Cut)
Output Gain: ±8 dB (0.1 dB resolution)

DAW Integration and Snapshot Recall:

Connects via USB to Mac/PC
Controlled with the dedicated Bettermaker SPE plugin
Up to 32 snapshots per session, recallable by automation
Hybrid workflow with digital filter curve preview and analogue curve overlay

Technical Specifications:

Maximum Input Level: +24 dBu (balanced, 48kΩ input impedance)
Maximum Output Level: +27 dBu (balanced, 50Ω + 50Ω output impedance)
Nominal Audio Level: +4 dBu
Frequency Response: 7 Hz - 30 kHz (-0.5 dB)
Frequency Flatness: ±0.2 dB (20 Hz - 20 kHz)
Dynamic Range: 101 dB (20 kHz BW, +24 dBu)
THD+N: 0.009% (+4 dBu, 20 kHz BW)
THD: 0.0025% (+4 dBu, 1 kHz)
CMRR: > 70 dB (20 Hz – 20 kHz)
Crosstalk: > 88 dB (20 Hz – 20 kHz, +18 dBu)
Enclosure: 2U height, 140 mm depth
Power Supply: 100-240VAC (included adapter), 15W max (2W standby)

The Bettermaker Stereo Passive Equaliser is the ultimate tool for mastering engineers who want the warmth and transparency of analogue passive EQ with the precision, speed, and convenience of digital control and plugin-based automation.