Behringer 0821-ACL86-EU1 EQP buizen-equalizer

In the world of professional audio, achieving that warm, musical equalization often means investing in expensive vintage hardware. The Behringer EQP Tube Equalizer solves this problem by delivering the classic Pultec-style passive EQ sound with modern reliability and affordability. This 2-channel tube equalizer brings the legendary low-end punch and silky high-frequency sheen to your studio or live rig, without the maintenance headaches of vintage units.

Who is it for

Audio engineers, producers, and musicians who demand authentic analog character. Whether you're tracking, mixing, or mastering, the EQP adds that sought-after tube warmth and passive EQ magic to vocals, drums, bass, and full mixes. Its dual-channel design is perfect for stereo bus processing or two independent mono sources.

Main features

• Authentic passive EQ design inspired by the legendary Pultec EQP-1A
• Tube-driven output stage with 4 x 12AX7 and 2 x 12AU7 tubes for rich harmonics
• Independent low-frequency boost and cut with selectable frequencies: 20, 30, 60, 100 Hz
• High-frequency boost at 3, 4, 5, 8, 10, 12, 16 kHz and cut at 5, 10, 20 kHz
• Transformer-balanced inputs and outputs for pristine signal integrity
• Class A circuitry for superior audio performance
• Balanced XLR and 1/4" TRS connectors on each channel
• Internal universal power supply (100-240V~) for worldwide use
• 2U rack-mountable chassis for professional installations

Specifications

• Channels: 2 (Stereo/Dual Mono)
• EQ Type: Passive, Tube-based
• Tube Complement: 4 x 12AX7, 2 x 12AU7
• Low Frequency Boost Points: 20, 30, 60, 100 Hz (selectable)
• Low Frequency Cut Points: 20, 30, 60, 100 Hz (selectable)
• High Frequency Boost Points: 3, 4, 5, 8, 10, 12, 16 kHz (selectable)
• High Frequency Cut Points: 5, 10, 20 kHz (selectable)
• Input Connectors: 2 x XLR (balanced), 2 x 1/4" TRS (balanced)
• Output Connectors: 2 x XLR (balanced), 2 x 1/4" TRS (balanced)
• Input Impedance: 600 Ohms (balanced)
• Output Impedance: 600 Ohms (balanced)
• Frequency Response: 20 Hz - 20 kHz (+/- 0.5 dB)
• Signal-to-Noise Ratio: >90 dB
• THD+N: <0.05% @ 1 kHz, +4 dBu
• Rack Size: 2U
• Power Supply: Internal, 100-240V~, 50/60Hz
• Circuitry: Class A, Transformer-balanced I/O
• Design Inspiration: Pultec EQP-1A

Tips

To get the most out of your EQP, experiment with the classic Pultec trick: boost and cut the same low frequency simultaneously to create a unique EQ curve that tightens the low end while adding depth. For vocals, a gentle boost at 12 kHz can add air and presence, while a slight cut at 100 Hz reduces muddiness. Always allow the tubes to warm up for a few minutes before critical listening to ensure stable operation.