Updated October 2026 · prices checked Oct 10, 2026.
Short answer: the FiiO K11 R2R (~$170) is the best amp under $200 for most people because it’s also a DAC. If you already have a DAC, the Schiit Magni (Unity) at $119 gives you more voltage for less. The Schiit Asgard 3 and Drop + THX AAA 789 that topped this list before are discontinued.
DAC + amp with a 4.4mm balanced output: about 1.3 W into 32Ω and 220 mW (8 V) into 300Ω balanced, FiiO spec. One box drives HD 600s and budget planars.
Best amp-only value: 2.5 W into 32Ω, 415 mW (11 V) into 300Ω and under 0.1Ω output impedance. $199 with the internal DAC card.
The Atom Amp+ replacement. JDS rates it at over 2.6 W per channel; functionally a Magni alternative with a different look and gain options.
The picks, with the math
The yardsticks: an HD 600 needs 2.45 V for 110 dB peaks, an HE400SE needs 80 mW (mostly current), and a Sundara about 40 mW. “Headroom” below is how far the amp’s rated output sits above that.
| Amp | Price | Type | Into 32Ω | Into 300Ω | HD 600 headroom |
|---|---|---|---|---|---|
| FiiO K11 R2R | ~$170 | DAC + amp | ~1.3 W bal. / ~0.5 W SE | ~220 mW bal. / ~50 mW SE | +10 dB bal. / +4 dB SE |
| Schiit Magni (Unity) | $119 | Amp (DAC card optional) | 2.5 W | 415 mW | +13 dB |
| JDS Labs Atom Amp 2 | ~$129 | Amp only | 2.6 W+ (JDS) | n/p | n/p |
| Schiit Vali 3 | $149 | Tube hybrid amp | 1.5 W | 400 mW | +13 dB |
| FiiO K7 (stretch) | ~$220 | DAC + amp | 2 W bal. | ~220 mW SE | +10 dB SE |
| Schiit Midgard (stretch) | $219 | Amp only | 4.8 W | 750 mW | +16 dB |
Manufacturer specs; FiiO K11 R2R figures vary slightly between FiiO’s retailer listings. n/p = not published. Schiit prices from schiit.com, Oct 10, 2026.
1. FiiO K11 R2R: best overall
The K11 R2R is the cheapest current box that does everything: an R2R DAC, a 6.35mm single-ended jack and a 4.4mm balanced jack. Use the balanced output for 300Ω headphones if you can. Single-ended, the K11 R2R is rated around 50 mW into 300Ω (about 3.9 V), which still clears the HD 600 by about 4 dB. Balanced, it’s about 8 V and 10 dB of headroom.
Who it’s for: anyone without a DAC, anyone who wants one box, and HD 600/650 owners willing to buy a $30–50 balanced cable. Who should skip it: owners of a good DAC or audio interface; an amp-only unit is cheaper per volt.
2. Schiit Magni (Unity): best amp-only
Schiit now sells a single Magni, replacing the Heresy and Heretic. At $119 it has the most voltage per dollar on this list and a preamp output for powered speakers. Schiit also offers it with a DAC card; Schiit’s site quotes $199 for that version, which makes it a direct rival to the K11 R2R. It has no balanced headphone output, and for a Magni that’s fine: 11 V single-ended is already more than most headphones will ever use.
3. JDS Labs Atom Amp 2
The Atom Amp 2 replaced the Atom Amp+ and sells mostly direct from JDS Labs at about $129. JDS rates it at over 2.6 W per channel. For any headphone on this site it’s interchangeable with the Magni, so buy whichever is in stock or whose front panel you prefer.
4. Schiit Vali 3: the tube-flavoured option
A tube-hybrid amp at $149 (Vali 3 at schiit.com ): a tube gain stage with a solid-state output, rated 1.5 W into 32Ω and 400 mW into 300Ω, with output impedance of 0.5–1.8Ω. Unlike an OTL tube amp, the low output impedance means it works with planars and low-impedance headphones too. Buy it if you want to hear what tube coloration does without committing to a $499 Valhalla 3. See tube vs solid state .
Stretch picks just over $200
- FiiO K7 (~$220). No longer on FiiO’s site but still sold new. AKM DAC, 4.4mm balanced, 2 W into 32Ω balanced. It costs about $50 more than the K11 R2R and has no clear advantage over it for most headphones; buy it only if you find it discounted. See today's price for the FiiO K7 on Amazon ↗
- Schiit Midgard ($219). Amp only, 4.8 W into 32Ω and 750 mW into 300Ω (Schiit spec) through either a ¼-inch or a 4-pin XLR jack. The most power in this guide, and the pick if you own a hungry planar and already have a DAC. Sold direct at schiit.com’s Midgard page .
What happened to the Asgard 3 and THX 789?
The Schiit Asgard 3 is discontinued. Schiit replaced it with the Asgard X at $399, which Schiit calls a big departure from the Asgard 3. If you want Schiit Class A warmth under $200 now, the Vali 3 is the closest thing, though it’s a different design.
The Drop + THX AAA 789 was sold by Drop, which closed on March 31, 2026, so it’s used-market only. The current balanced-power alternatives are the Topping DX5 II (~$299) and the Schiit Jotunheim 3 ($499); see the best balanced headphone amps .
Both old reviews stay up for owners: Asgard 3 and THX 789 .
Need a DAC for an amp-only pick?
| DAC | Price | Notes |
|---|---|---|
| Schiit Modi 5 | $149 | USB, optical, coax; 2 V out with the optional wall wart |
| Topping E30 II | check price | Dual AK4493S, USB/optical/coax, RCA out |
| SMSL SU-1 | check price | AK4493S, USB/optical/coax, RCA out |
More in the best DAC under $200 guide. A Modi 5 + Magni (Unity) stack is $268 at Schiit’s list prices.
Who should not buy an amp at this price
- ATH-M50x, HD 560S and IEM owners. They need about 1 V or less, so a phone or the $9 Apple dongle already reaches loud levels. See do I need a headphone amp?
- Anyone shopping for an HD 600 or HD 650 on a tight budget. The $119 Magni drives them as well as anything here; put the difference toward the headphone.
