Short answer: the JDS Labs Atom Amp 2. Both are rated 4.7/5 (#9 and #8 of 19 headphone amplifiers), and the JDS Labs Atom Amp 2 costs $129 against $169 for the Topping L50, and with measured performance even, the cheaper one is the better buy.
Why pick the JDS Labs Atom Amp 2: Audio Science Review measured a SINAD of 120 dB, so its noise and distortion are inaudible. The catch: It has no DAC, so you need a separate source.
The case for the Topping L50: Audio Science Review measured a SINAD of 121 dB, so the amp adds no audible noise or distortion. Watch for: It has no DAC, so it needs a separate source with line outputs.
Buy the JDS Labs Atom Amp 2. Both are rated the same, and it costs $40 less than the Topping L50.
Looking for alternatives? See the complete Headphone Amps and DACs rankings.
Specifications Side By Side
| JDS Labs Atom Amp 2 | Topping L50 | |
|---|---|---|
| Price | $129 | $169.00 |
| Ranked | #9 of 19 in Headphone Amplifiers | #8 of 19 in Headphone Amplifiers |
| Device Type | Headphone amp | Headphone amp |
| SINAD | 120 dB (measured by Audio Science Review) | 121 dB (measured by Audio Science Review) |
| Output Power (32 ohms) | 2,650 mW (manufacturer rated) | 2,800 mW (manufacturer rated) |
| Output Power (300 ohms) | 286 mW (manufacturer rated) | 540 mW (manufacturer rated) |
| Headphone Outputs | 6.35 mm, 4.4 mm | 6.35 mm, 4-pin XLR |
| Inputs | RCA, 3.5 mm | RCA, 6.35 mm TRS balanced |
| Outputs | RCA | RCA, 6.35 mm TRS (input passthrough, active only when the amp is off) |
| Volume Control | Hardware knob | Hardware knob |
| Dimensions | 5.7” x 1.3” x 5.2” (145 x 34 x 131 mm) | 6.5” x 1.6” x 5.1” (166 x 41 x 129 mm) |
| Weight | 1 lbs (454 g) | 1.2 lbs (545 g) |
Related Amp and DAC Comparisons
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- Topping A30 Pro vs Topping L50
- Topping A50 III vs Topping L50
- Topping A70 Pro vs Topping L50
- Schiit Midgard vs Topping L50
- Topping L30 vs Topping L50
Prices on this page were last checked October 11, 2026 at 4:59 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Amps and DACs In Full
JDS Labs Atom Amp 2: $129 JDS Labs eBay
Pros: Audio Science Review measured a SINAD of 120 dB, so its noise and distortion are inaudible. A rated 2,650 mW into 32 ohms and 286 mW into 300 ohms drives nearly any headphone, and it offers both 6.35 mm and 4.4 mm outputs. It matches the rating of the Topping L50 for less and adds RCA preamp outputs for powered speakers.
Cons: It has no DAC, so you need a separate source. Its inputs are RCA and 3.5 mm only, with no balanced XLR input, and the Topping A50 III rates slightly higher for a bit more.
Full JDS Labs Atom Amp 2 review and specifications →
| Device Type | Headphone amp |
|---|---|
| Dimensions | 5.7” x 1.3” x 5.2” (145 x 34 x 131 mm) |
| Headphone Outputs | 6.35 mm, 4.4 mm |
| Inputs | RCA, 3.5 mm |
| Output Power (300 ohms) | 286 mW (manufacturer rated) |
| Output Power (32 ohms) | 2,650 mW (manufacturer rated) |
| Outputs | RCA |
| SINAD | 120 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob |
| Weight | 1 lbs (454 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Topping L50: $169.00 Amazon eBay
Pros: Audio Science Review measured a SINAD of 121 dB, so the amp adds no audible noise or distortion. A rated 2,800 mW into 32 ohms and 540 mW into 300 ohms is enough for nearly any headphone, including demanding planar magnetic and high impedance models. It offers a 4-pin XLR balanced headphone output and accepts balanced 6.35 mm TRS or RCA inputs.
Cons: It has no DAC, so it needs a separate source with line outputs. The Topping A50 III rates slightly higher with more rated power for a little more, and the passthrough outputs only work while the amp is switched off.
Full Topping L50 review and specifications →
| Device Type | Headphone amp |
|---|---|
| Dimensions | 6.5” x 1.6” x 5.1” (166 x 41 x 129 mm) |
| Headphone Outputs | 6.35 mm, 4-pin XLR |
| Inputs | RCA, 6.35 mm TRS balanced |
| Output Power (300 ohms) | 540 mW (manufacturer rated) |
| Output Power (32 ohms) | 2,800 mW (manufacturer rated) |
| Outputs | RCA, 6.35 mm TRS (input passthrough, active only when the amp is off) |
| SINAD | 121 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob |
| Weight | 1.2 lbs (545 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons