Bettermaker Stereo Passive Equalizer (SPE) Limited Edition – Stereo Passive EQ with DAW Recall & Automation

OVERVIEW

Legendary Passive EQ Meets Modern Digital Control

The Bettermaker Stereo Passive Equalizer (SPE) Limited Edition is designed for engineers who want the musical character of a legendary passive equalizer combined with the speed and precision of a modern digital workflow. Its audio path remains 100% analog, using carefully matched passive filters, capacitors and inductors to deliver the substantial low end and open, airy high-frequency character associated with premium passive EQ designs. Extended high-frequency boost selections reaching 20 and 28 kHz provide additional control over the top end, while adjustable output gain makes it easy to integrate the processor into demanding mastering, mixing and hybrid setups.

Digital Convenience Without Compromising the Analog Signal Path

Although the audio remains analog, control and user interaction are handled digitally. A dedicated 32-bit microcontroller manages the analog filter parameters, user interface and USB connectivity, allowing rapid, precise and repeatable adjustments, instant parameter resets, precisely linked stereo operation and DAW automation. The dedicated plugin also allows up to 32 snapshots of the hardware state to be triggered through automation, making complex mastering sessions significantly easier to recall and manage. Bettermaker continues to position this combination of analog processing and patented digital control as a core part of its professional workflow.

Exclusive Limited Edition

The Limited Edition was created to celebrate sales exceeding 1,000 Stereo Passive Equalizers and adds more than a cosmetic refresh. It features an exclusive new appearance and comes with a premium-quality carrying bag and Bettermaker certificate of quality, while the accompanying plugin introduces a new saturation engine for additional sonic shaping. The result is a particularly attractive version of the SPE for engineers who want its established passive EQ character alongside enhanced modern workflow and saturation capabilities.

KEY HIGHLIGHTS

100% Analog Audio Signal Path

The SPE keeps the audio path entirely analog, preserving the depth, musicality and character of its passive filter network while digital control handles parameter management, recall and automation.

Legendary Passive EQ Character

Precisely matched passive filters, capacitors and inductors provide the broad, musical response associated with high-quality passive equalization, with substantial low-end shaping and an open, extended top end.

Digital Recall and Automation

USB connectivity and the dedicated plugin allow the hardware to be controlled, recalled and automated from a DAW, combining analog processing with the convenience of a software workflow.

Extended High-Frequency Air Bands

The high-boost section extends to 20 kHz and 28 kHz, providing exceptionally broad top-end shaping for adding openness, air and definition without relying on conventional high-frequency bands.

Precise Stereo Operation

Digitally controlled stereo linking allows both channels to be adjusted together with precision, making the SPE particularly well suited to stereo bus and mastering applications.

Up to 32 Recallable Snapshots

The dedicated plugin can store up to 32 SPE states that can be recalled through DAW automation, allowing complete EQ settings to be recalled quickly between songs or sessions.

New Saturation Engine

The Limited Edition’s new plugin adds a dedicated saturation engine, expanding the processor beyond passive tonal shaping and providing an additional option for introducing controlled harmonic character.

Exclusive Limited Edition Package

Created to celebrate more than 1,000 SPE units sold, the Limited Edition features an exclusive appearance and includes a premium carrying bag and Bettermaker certificate of quality.

FEATURES

• 100% analog audio signal path for authentic passive EQ character
• Digitally controlled analog filters combining analog sound with modern workflow convenience
• USB connectivity for Mac/PC integration
• Dedicated Bettermaker Stereo Passive Equalizer plugin for hardware control
• DAW recall and automation of available parameters
• Up to 32 programmable snapshots that can be triggered through DAW automation
• Instant parameter reset for rapid workflow changes
• Rapid, precise and repeatable parameter adjustments
• Precisely linked stereo operation for convenient two-channel control
• Stereo passive equalizer with extended high-frequency boost section
• High-boost frequencies extending to 20 kHz and 28 kHz for additional “air” and openness
• Adjustable output level of ±8 dB
• Dedicated 24 dB/octave digital high-pass filter within the plugin
• Plugin-based FFT spectrum analyser with digital and analog passive-filter curve approximation
• New saturation engine included with the Limited Edition plugin
• 101-step control resolution for Low Boost, Low Cut, High Boost and Bandwidth
• 34-step control resolution for High Cut
• 0.1 dB output-gain resolution
• Designed for mastering, mix-bus processing, mixing and hybrid analog/digital workflows
• Exclusive Limited Edition appearance
• Premium-quality carrying bag included
• Bettermaker certificate of quality included
• 2U rackmount format
• Compact 140 mm chassis depth
• Universal 100–240 VAC power adapter included

Bettermaker’s current software ecosystem continues to support dedicated plugins and firmware for its hardware processors, including the Stereo Passive Equalizer.

TECHNICAL SPECS

Specification	Details
Product Type	Stereo Passive Equalizer
Edition	Limited Edition
Audio Signal Path	100% analog
Control	Digitally controlled
Computer Connectivity	USB
Computer Compatibility	Mac/PC
Maximum Input Level	+24 dBu
Input	Balanced
Input Impedance	48 kΩ
Maximum Output Level	+27 dBu
Output	Balanced
Output Impedance	50 Ω + 50 Ω
Nominal Audio Level	+4 dBu
Frequency Response	7 Hz – 30 kHz (-0.5 dB, ISO-R40 sweep)
Frequency Flatness	±0.2 dB (20 Hz – 20 kHz, ISO-R40 sweep)
Dynamic Range	101 dB (20 kHz bandwidth, +24 dBu)
THD+N Ratio	0.009% (20 kHz bandwidth, +4 dBu, 1 kHz)
THD Ratio	0.0025% (+4 dBu, 1 kHz)
CMRR	>70 dB (20 Hz – 20 kHz, IEC 60268-3)
Crosstalk	>88 dB (20 Hz – 20 kHz, +18 dBu, channel to channel)
Maximum LF Boost	15 dB (at 100 Hz)
Maximum LF Cut	16 dB (at 100 Hz)
Maximum HF Boost	18 dB (all frequencies)
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
Control Resolution	101 steps (Lo Boost, Lo Cut, Hi Boost, Bandwidth); 34 steps (Hi Cut)
Output Gain	±8 dB
Output Gain Resolution	0.1 dB
Digital High-Pass Filter	24 dB/octave
Digital HPF	Included in dedicated plugin
FFT Analyser	Included in dedicated plugin
Saturation Engine	Included with Limited Edition plugin
DAW Snapshots	Up to 32
DAW Automation	Yes
Stereo Linking	Yes
USB Firmware Updates	Supported
Rack Space	2U
Depth	140 mm
Power Consumption	15 W
Standby Power Consumption	2 W
Power Supply	100–240 VAC power adapter
Edition Package	Premium-quality carrying bag and Bettermaker certificate of quality