Schiit Jotunheim 3 vs Drop THX AAA789 Review

There's a moment in every audio enthusiast's journey where the entry-level gear just doesn't cut it anymore. You've got great headphones, a decent DAC, and then you hit the wall — the amp. Two names come up constantly at this crossroads: the Schiit Jotunheim 3 and the Drop THX AAA 789. One is a seasoned upgrade path with a cult following, the other a beloved benchmark-setter that rewrote expectations for its price. Let's break down which one deserves your desk.

Schiit Jotunheim 3

What Makes It Stand Out

The Jotunheim 3 is Schiit's evolution of a design that's been refined over years of community feedback. It's a fully balanced solid-state headphone amplifier and preamp built in the USA, and it shows in the build quality — the chassis feels like it could survive being dropped off a desk, which is more than can be said for a lot of competitors at this price tier.

One Reddit user who upgraded directly from the Drop THX AAA 789 put it plainly: the Jotunheim 3 "joins my Modius DAC and Dark Voice to round off my system" alongside Focal Elex and HD6XX cans. That's a meaningful endorsement — this is an amp people are choosing after already owning the THX 789, not instead of. The modular design is a genuine differentiator: you can slot in a DAC or phono module directly into the unit, reducing cable clutter and desktop sprawl. For audiophiles running setups with multiple sources, this flexibility is genuinely useful.

The balanced output is fully implemented, not a half-measure, and it handles demanding low-impedance planars as well as high-impedance dynamics without breaking a sweat. The preamp outputs also make it useful as a system hub, not just a headphone amp.

Where It Falls Short

It's not cheap. The Jotunheim 3 sits at a significantly higher price point than the 789, and you need to factor in the optional DAC module cost if you want the all-in-one convenience. Some users also note that Schiit's house sound — while clean — has a very slight warmth compared to the near-clinical neutrality of the THX 789, which can be either a feature or a flaw depending on your preferences and headphones.

Drop THX AAA 789

The Benchmark That Changed the Game

When the THX 789 launched, it caused a legitimate stir. THX's Achromatic Audio Amplifier technology promised near-zero distortion at an accessible price point — and it delivered. For years, the 789 was the answer whenever someone asked "what amp should I buy for under $300?" Its measured performance genuinely rivals amps costing two or three times more.

The sound signature is textbook neutral. No coloration, no warmth, no treble sparkle added — just whatever signal you feed it, amplified faithfully. For analytical listening, mastering work, or pairing with warm headphones like the HD 6XX (a classic match), it's exceptional. The balanced XLR input and output mean it integrates cleanly into a proper balanced chain.

Where It Shows Its Age

The 789 has a known issue that's become almost a rite of passage in the community: channel imbalance at low volume on the potentiometer. For late-night quiet listening, you'll sometimes find one channel slightly louder than the other in the lower portion of the dial. It's a hardware limitation of the pot, not a defect per unit — but it's annoying.

The build, while solid, isn't quite as premium-feeling as Schiit's metal work. The front panel has that industrial, utilitarian look that some love and others find uninspiring. More importantly, it lacks any integrated DAC option or preamp flexibility — it's an amp, full stop. No modularity, no expansion path. What you buy is what you get.

Stock availability through Drop has also been inconsistent over the years, meaning prices fluctuate and you may wait for a restock window.

Side-by-Side Comparison

Feature	Schiit Jotunheim 3	Drop THX AAA 789
Price	~$399+ (without module)	~$219-$299
Amplifier Technology	Fully balanced solid-state	THX AAA (feed-forward)
Modularity	Yes — DAC/phono modules available	No
Preamp Outputs	Yes	No
Balanced I/O	Yes (XLR in/out)	Yes (XLR in/out)
Sound Character	Neutral, slight warmth	Clinical neutral, ruler-flat
Build Quality	Excellent (USA-built metal chassis)	Good, utilitarian
Known Issues	Minor: cost of optional modules adds up	Channel imbalance at low volume
Best For	System builders, upgraders	Pure measurement, value seekers
Our Rating	4.5 / 5	4.0 / 5

Frequently Asked Questions

Q: Is the Schiit Jotunheim 3 worth upgrading to from the Drop THX AAA 789?

A: If you want more system flexibility, preamp outputs, and modular DAC integration, yes — the Jotunheim 3 is a meaningful step up. Community members who made exactly this upgrade report using both in complementary roles rather than replacing the 789 outright.

Q: Does the Drop THX AAA 789 have channel imbalance issues?

A: Yes, this is a widely reported limitation of the volume potentiometer at very low listening levels. It's a hardware characteristic of the unit, not a defect. Most users find it a non-issue at moderate volumes.

Q: Which amp is better for planar magnetic headphones like Hifiman or Audeze?

A: Both handle planars well due to their high current output. The Jotunheim 3's fully balanced design gives it a slight edge for demanding low-impedance planars.

Q: Can the Drop THX AAA 789 be used as a preamp for speakers?

A: No — the 789 is a dedicated headphone amplifier without preamp outputs. The Jotunheim 3 includes preamp functionality, making it more versatile for speaker-based systems.

Q: Which is better for someone buying their first serious amplifier?

A: The Drop THX AAA 789 remains one of the best entry points into high-performance amplification for the money. If budget is a concern, start there. If you're planning to grow your system, the Jotunheim 3's modularity might save you money long-term.

Final Verdict

The Drop THX AAA 789 is still a remarkable amplifier for the price — technically competent, genuinely neutral, and a proven quantity. But the Schiit Jotunheim 3 wins this head-to-head as an overall package. The modularity, build quality, preamp outputs, and upgrade ceiling make it the smarter long-term investment. The fact that real users are upgrading from the 789 to the Jotunheim 3 — and often keeping both — tells you everything.

Buy the THX 789 if you want the best pure amplification performance per dollar spent and have a DAC already sorted. Buy the Jotunheim 3 if you're building a system, want a hub you won't need to replace, and can stomach spending more upfront for a unit that scales with you.

— Tech Lead Editor 1, CPrice