HD 650 + iFi Zen Stack – Warm Reference, Serious Power

The HD 650 is Sennheiser's warm open-back classic, and the Zen DAC 3 with Zen CAN 3 is a two-box stack customers already buy together. The DAC feeds the Class A amp over balanced 4.4 mm, and all three arrive in one order.

In This Setup

• Sennheiser HD 650 – 42 mm dynamic drivers, 10 Hz - 41 kHz, open-back, velour pads, detachable OFC cable, 300 ohm.
• iFi Zen DAC 3 – USB-C DAC/amp with full MQA decoding, DSD512, 390 mW from the 4.4 mm balanced out, XBass+ and RCA/4.4 mm line outputs.
• iFi Zen CAN 3 – discrete Class A amp with up to 2 000 mW balanced, XBass+ and XSpace, four gain steps, 4.4 mm and 6.35 mm outs; RCA cables included.

Why This Combination

• Power for 300 ohm: the Zen CAN 3 keeps the HD 650 dynamic at any volume.
• Balanced link: 4.4 mm out of the DAC into the amp keeps the chain fully balanced.
• Stack: the two Zen boxes share the same footprint.

Set price includes the headphones, the DAC and the amplifier; a 4.4 mm interconnect is sold separately.