Short answer: the Topping A30 Pro. It ranks #1 of 19 headphone amplifiers by measured performance, rated 4.8/5, at $349.99; the Soncoz SGA1 ranks #12, rated 4.5/5, and costs $649.99, so there is not much of a tradeoff to weigh.
What the Topping A30 Pro does well: Audio Science Review measured 121 dB SINAD, so its noise and distortion are inaudible. Watch for: It is an analog only amp with no USB or other digital input, so you need a separate DAC.
What the Soncoz SGA1 does well: Audio Science Review measured 118 dB SINAD, so its noise and distortion are inaudible. The tradeoff: It is an analog only amp with no digital inputs, so you need a separate DAC.
Buy the Topping A30 Pro. It is rated higher than the Soncoz SGA1 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Headphone Amps and DACs rankings cover every ranked option.
Specifications Side By Side
| Topping A30 Pro | Soncoz SGA1 | |
|---|---|---|
| Price | $349.99 | $649.99 |
| Ranked | #1 of 19 in Headphone Amplifiers | #12 of 19 in Headphone Amplifiers |
| Device Type | Headphone amp | Headphone amp |
| SINAD | 121 dB (measured by Audio Science Review) | 118 dB (measured by Audio Science Review) |
| Output Power (32 ohms) | 5,500 mW (manufacturer rated) | 420 mW (manufacturer rated at 33 ohms, balanced) |
| Output Power (300 ohms) | 840 mW (manufacturer rated) | 840 mW (manufacturer rated, balanced) |
| Headphone Outputs | 6.35 mm, 4-pin XLR, 4.4 mm | 6.35 mm, 4-pin XLR balanced, 4.4 mm balanced |
| Balanced Output | Yes (4-pin XLR, 4.4 mm) | Yes (4-pin XLR, 4.4 mm, XLR line out) |
| Inputs | RCA, XLR | RCA, XLR |
| Outputs | RCA pass-through, 6.35 mm TRS pass-through | RCA, XLR |
| Volume Control | Hardware knob | Electronic stepped volume (MUSES72320) |
| Dimensions | 6.9” x 1.8” x 5.4” (174 x 45 x 138 mm) | 9.8” x 2.2” x 8.9” (250 x 55 x 225 mm) |
| Weight | 1.9 lbs (870 g) | 4.4 lbs (2,000 g) |
Related Amp and DAC Comparisons
More worthwhile head-to-heads for Topping A30 Pro:
- Topping A30 Pro vs Topping A50 III
- Topping A30 Pro vs Topping A70 Pro
- Topping A30 Pro vs Topping A90 Discrete
- Schiit Midgard vs Topping A30 Pro
- SMSL VMV P2 vs Topping A30 Pro
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
Topping A30 Pro: $349.99 HiFiGo eBay
Pros: Audio Science Review measured 121 dB SINAD, so its noise and distortion are inaudible. Topping rates it at 5,500 mW into 32 ohms and 840 mW into 300 ohms, enough power for nearly any headphone, with 6.35 mm, 4-pin XLR and 4.4 mm balanced outputs plus RCA and XLR inputs. Pass-through outputs let it sit in a chain ahead of speakers.
Cons: It is an analog only amp with no USB or other digital input, so you need a separate DAC. The Topping A50 III rates the same with the same measured SINAD for less.
Full Topping A30 Pro review and specifications →
| Balanced Output | Yes (4-pin XLR, 4.4 mm) |
|---|---|
| Device Type | Headphone amp |
| Dimensions | 6.9” x 1.8” x 5.4” (174 x 45 x 138 mm) |
| Headphone Outputs | 6.35 mm, 4-pin XLR, 4.4 mm |
| Inputs | RCA, XLR |
| Output Power (300 ohms) | 840 mW (manufacturer rated) |
| Output Power (32 ohms) | 5,500 mW (manufacturer rated) |
| Outputs | RCA pass-through, 6.35 mm TRS pass-through |
| SINAD | 121 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob |
| Weight | 1.9 lbs (870 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Soncoz SGA1: $649.99 HiFiGo eBay
Pros: Audio Science Review measured 118 dB SINAD, so its noise and distortion are inaudible. It offers 6.35 mm, 4-pin XLR and 4.4 mm balanced headphone outputs, RCA and XLR inputs and outputs, and a stepped electronic volume control, with 840 mW into 300 ohms for high impedance headphones.
Cons: It is an analog only amp with no digital inputs, so you need a separate DAC. Soncoz rates it at 420 mW balanced into 33 ohms rather than 32, which drives most headphones but is modest next to the Topping L30, a higher rated amp that costs far less.
Full Soncoz SGA1 review and specifications →
| Balanced Output | Yes (4-pin XLR, 4.4 mm, XLR line out) |
|---|---|
| Device Type | Headphone amp |
| Dimensions | 9.8” x 2.2” x 8.9” (250 x 55 x 225 mm) |
| Headphone Outputs | 6.35 mm, 4-pin XLR balanced, 4.4 mm balanced |
| Inputs | RCA, XLR |
| Output Power (300 ohms) | 840 mW (manufacturer rated, balanced) |
| Output Power (32 ohms) | 420 mW (manufacturer rated at 33 ohms, balanced) |
| Outputs | RCA, XLR |
| SINAD | 118 dB (measured by Audio Science Review) |
| Volume Control | Electronic stepped volume (MUSES72320) |
| Weight | 4.4 lbs (2,000 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Soncoz SGA1 vs Benchmark HPA4
- Soncoz SGA1 vs Violectric HPA V550 PRO
- Soncoz SGA1 vs Little Labs Monotor
- Soncoz SGA1 vs Tom Christiansen Audio HPA-1
- Soncoz SGA1 vs Rupert Neve Designs RNHP
- Soncoz SGA1 vs SMSL VMV P2
- Soncoz SGA1 vs HeadAmp Gilmore Lite Mk2
- Soncoz SGA1 vs Topping A90 Discrete
- See all 9 comparisons