Short answer: the Topping A70 Pro. It ranks #3 of 19 headphone amplifiers by measured performance, rated 4.8/5, at $499; the Soncoz SGA1 ranks #12, rated 4.5/5, and costs $649.99, so there is little reason to consider the other one.
The case for the Topping A70 Pro: Audio Science Review measured 121 dB SINAD, so its noise and distortion are transparent. The tradeoff: It is a headphone amp only, so it needs 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 A70 Pro. It is rated higher than the Soncoz SGA1 and costs less, so only choose the other one for a particular feature it does better.
Still deciding? The full Headphone Amps and DACs rankings cover every ranked option.
Specifications Side By Side
| Topping A70 Pro | Soncoz SGA1 | |
|---|---|---|
| Price | $499.00 | $649.99 |
| Ranked | #3 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) | 12,600 mW (manufacturer rated, balanced) | 420 mW (manufacturer rated at 33 ohms, balanced) |
| Output Power (300 ohms) | 1,370 mW (manufacturer rated, balanced) | 840 mW (manufacturer rated, balanced) |
| Headphone Outputs | 6.35 mm, 4.4 mm balanced, 4-pin XLR balanced | 6.35 mm, 4-pin XLR balanced, 4.4 mm balanced |
| Balanced Output | Yes (4.4 mm, 4-pin XLR, XLR line out) | Yes (4-pin XLR, 4.4 mm, XLR line out) |
| Inputs | RCA, XLR/6.35 mm TRS combo | RCA, XLR |
| Outputs | RCA, XLR | RCA, XLR |
| Volume Control | Hardware knob | Electronic stepped volume (MUSES72320) |
| Dimensions | 8.7” x 1.9” x 6.9” (222 x 48 x 176 mm) | 9.8” x 2.2” x 8.9” (250 x 55 x 225 mm) |
| Weight | 2.8 lbs (1,270 g) | 4.4 lbs (2,000 g) |
Related Amp and DAC Comparisons
More top alternatives to Topping A70 Pro:
- Topping A30 Pro vs Topping A70 Pro
- Topping A50 III vs Topping A70 Pro
- Topping A70 Pro vs Topping A90 Discrete
- Schiit Midgard vs Topping A70 Pro
- SMSL VMV P2 vs Topping A70 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 A70 Pro: $499.00 Amazon eBay
Pros: Audio Science Review measured 121 dB SINAD, so its noise and distortion are transparent. A rated 12.6 W balanced into 32 ohms and 1.37 W into 300 ohms is enough for nearly any headphone, through 6.35 mm, 4.4 mm and 4-pin XLR outputs, and it has XLR and RCA preamp outputs for powered speakers.
Cons: It is a headphone amp only, so it needs a separate DAC. The Topping A50 III matches its rating and SINAD for far less, with power that is still plenty for planar magnetics.
Full Topping A70 Pro review and specifications →
| Released | May 2023 (3 years ago) |
|---|---|
| Balanced Output | Yes (4.4 mm, 4-pin XLR, XLR line out) |
| Device Type | Headphone amp |
| Dimensions | 8.7” x 1.9” x 6.9” (222 x 48 x 176 mm) |
| Headphone Outputs | 6.35 mm, 4.4 mm balanced, 4-pin XLR balanced |
| Inputs | RCA, XLR/6.35 mm TRS combo |
| Output Power (300 ohms) | 1,370 mW (manufacturer rated, balanced) |
| Output Power (32 ohms) | 12,600 mW (manufacturer rated, balanced) |
| Outputs | RCA, XLR |
| SINAD | 121 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob |
| Weight | 2.8 lbs (1,270 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
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- 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