Short answer: the Topping A90 Discrete. It ranks #4 of 19 headphone amplifiers by measured performance, rated 4.8/5, at $599; the Rupert Neve Designs RNHP ranks #15, rated 3.2/5, and costs $699, so there is not much of a tradeoff to weigh.
The Topping A90 Discrete is the better-sounding pick. Audio Science Review measured a SINAD of 119 dB, so its noise and distortion are inaudible. Watch for: It is a headphone amp only, so it needs a separate DAC.
What the Rupert Neve Designs RNHP does well: Audio Science Review measured a SINAD of 101 dB, clean enough for nearly all listening. Watch for: Rupert Neve Designs does not publish a power figure into 32 ohms, so its ability to drive demanding headphones is unknown.
Buy the Topping A90 Discrete. It is rated higher than the Rupert Neve Designs RNHP and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphone Amps and DACs rankings.
Specifications Side By Side
| Topping A90 Discrete | Rupert Neve Designs RNHP | |
|---|---|---|
| Price | $599.00 | $699.00 |
| Ranked | #4 of 19 in Headphone Amplifiers | #15 of 19 in Headphone Amplifiers |
| Device Type | Headphone amp | Headphone amp |
| SINAD | 119 dB (measured by Audio Science Review) | 101 dB (measured by Audio Science Review) |
| Output Power (32 ohms) | 6,700 mW (manufacturer rated, balanced) | - |
| Output Power (300 ohms) | 1,000 mW (manufacturer rated, balanced) | - |
| Headphone Outputs | 6.35 mm, 4.4 mm balanced, 4-pin XLR balanced | - |
| Balanced Output | Yes (4.4 mm, 4-pin XLR) | - |
| Inputs | RCA, XLR | XLR/TRS combo, RCA, 3.5 mm |
| Outputs | RCA, XLR (preamp) | - |
| Volume Control | Hardware knob (relay R2R) and remote | Hardware knob |
| Dimensions | 8.7” x 1.8” x 6.3” (222 x 45 x 160 mm) | 6.5” x 1.9” x 4.6” (165 x 48 x 117 mm) |
| Weight | - | 2 lbs (900 g) |
Related Amp and DAC Comparisons
More top alternatives to Topping A90 Discrete:
- Topping A30 Pro vs Topping A90 Discrete
- Topping A70 Pro vs Topping A90 Discrete
- Schiit Midgard vs Topping A90 Discrete
- SMSL VMV P2 vs Topping A90 Discrete
- Topping A90 Discrete vs Tom Christiansen Audio HPA-1
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 A90 Discrete: $599.00 Amazon eBay
Pros: Audio Science Review measured a SINAD of 119 dB, so its noise and distortion are inaudible. A rated 6,700 mW into 32 ohms and 1,000 mW into 300 ohms from the balanced outputs is enough for nearly any headphone. It offers 6.35 mm, 4.4 mm and 4-pin XLR outputs, a relay volume control with remote, and RCA and XLR preamp outputs for powered speakers.
Cons: It is a headphone amp only, so it needs a separate DAC. The Topping A50 III rates the same and measures slightly cleaner at 121 dB for far less. The Topping A70 Pro rates the same with more rated power for less.
Full Topping A90 Discrete review and specifications →
| Balanced Output | Yes (4.4 mm, 4-pin XLR) |
|---|---|
| Device Type | Headphone amp |
| Dimensions | 8.7” x 1.8” x 6.3” (222 x 45 x 160 mm) |
| Headphone Outputs | 6.35 mm, 4.4 mm balanced, 4-pin XLR balanced |
| Inputs | RCA, XLR |
| Output Power (300 ohms) | 1,000 mW (manufacturer rated, balanced) |
| Output Power (32 ohms) | 6,700 mW (manufacturer rated, balanced) |
| Outputs | RCA, XLR (preamp) |
| SINAD | 119 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob (relay R2R) and remote |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Topping A90 Discrete vs Schiit Midgard
- Topping A90 Discrete vs Topping A70 Pro
- Topping A90 Discrete vs SMSL VMV P2
- Topping A90 Discrete vs Topping A30 Pro
- Topping A90 Discrete vs Tom Christiansen Audio HPA-1
- Topping A90 Discrete vs Violectric HPA V550 PRO
- Topping A90 Discrete vs Soncoz SGA1
- Topping A90 Discrete vs Little Labs Monotor
- See all 9 comparisons
Rupert Neve Designs RNHP: $699.00 Amazon eBay
Pros: Audio Science Review measured a SINAD of 101 dB, clean enough for nearly all listening. It accepts an XLR/TRS combo input, RCA and 3.5 mm sources, making it easy to connect studio or home gear.
Cons: Rupert Neve Designs does not publish a power figure into 32 ohms, so its ability to drive demanding headphones is unknown. There is no balanced headphone output listed. The Topping L50 rates much higher, measures cleaner and is rated for 2,800 mW into 32 ohms for far less.
Full Rupert Neve Designs RNHP review and specifications →
| Device Type | Headphone amp |
|---|---|
| Dimensions | 6.5” x 1.9” x 4.6” (165 x 48 x 117 mm) |
| Inputs | XLR/TRS combo, RCA, 3.5 mm |
| SINAD | 101 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob |
| Weight | 2 lbs (900 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Rupert Neve Designs RNHP vs Chord Alto
- Rupert Neve Designs RNHP vs Little Labs Monotor
- Rupert Neve Designs RNHP vs Fosi Audio SK01
- Rupert Neve Designs RNHP vs HeadAmp Gilmore Lite Mk2
- Rupert Neve Designs RNHP vs Soncoz SGA1
- Rupert Neve Designs RNHP vs Tom Christiansen Audio HPA-1
- Rupert Neve Designs RNHP vs Topping A70 Pro