Alto HPA6 6-Channel Headphone Amplifier

The HPA6 delivers six fully independent, high-power headphone amps in a compact 1U rack format, making it ideal for studios, rehearsal spaces, and live setups. Each channel offers its own stereo aux input with level control: perfect for adding click tracks, loops, or any other source.

Key features include:
• Six discrete mixes, powering up to 18 headphone pairs
• Front-panel ¼” direct input for instantly blending an extra source into all channels
• Per-channel mono switch and left/right mutes for flexible monitoring setups
• Four-segment LED meters on every channel for quick visual level checks
• Rugged build with servo-balanced, gold-plated XLR and ¼” TRS connectors

On the front panel, each channel has a ¼” headphone output with dedicated level and balance controls. A master section features an eight-segment LED meter, master volume, and the direct-in jack for fast source integration, giving you complete control over cue mixes right where you need it.

PSU works on 90-240V, depending on the fuse installed. Currently set up for 240V operation. EU power cord included.

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.