Black Box HG-Q Stereo Tube Equalizer with Digital Control and Recall

The Black Box Analog Design HG-Q is a 3U boutique EQ and saturator
that combines true analog processing with plug-in control. With six fully independent bands, tube-driven boost stages, solid-state cut filters, and stereo, dual-mono, mono, and M/S operation, it goes far beyond traditional EQ duties.

Its unique topology allows simultaneous boost, cut, and saturation for complex, highly musical curves, while 2X mode expands the range for more dramatic tonal shaping. The result is an EQ that adds harmonic richness, density, depth, and clarity without sacrificing transients or detail.

Paired with the HG-Q Control Plugin, the hardware also offers preset recall, automation, and detailed curve visualization, making it a powerful hybrid tool for both creative enhancement and precise mix shaping.

Features
• Six independent bands per channel
• Separate boost and cut circuits with independent gain, Q, and frequency controls
• Tube saturation built into the boost stages
• Solid-state cut filters for clean, precise shaping
• Unique interactive analog topology with complex phase relationships
• 2X mode for extended boost and cut range with stronger saturation
• Stereo, dual-mono, mono, and M/S operation
• Series and parallel band configurations
• Plug-in control for preset recall, automation, and workflow integration
• Frequency curve display and expanded control view in the plug-in
• 3U rackmount format with boutique analog construction

US and EU parcels ship via UPS, ETA 1-7 working days from pickup day zero. That also applies to most locations worldwide.

All shipments are fully insured.

Bigger shipments requiring pallets or custom made crates ship to US, CA, JP, CN, AU and other outside of EU locations via DHL Air Freight, ETA is normally approx. 7-14 working days from pickup day zero.

Big shipments inside EU ship via different freight companies, recently mostly via ACE Logistics. Freight forwarders can use different courier companies for deliveries to final destinations.

Palletising and crating time can vary depending on the size of the shipment and packaging queue. We pack all our shipments with great care.

You are most welcome to pick your order up yourself from our Retrosonic Pro Audio showroom, studio and warehouse in Tallinn, Estonia.

We ship worldwide – contact us for a personal shipping quote or any other questions.

VAT (Value Added Tax) can be deducted if you have a company with a valid EU VAT number or if you're based outside of the EU. Non-EU buyers pay all and any import tax and duty as regulated by their local customs.