ATI AT525NC vs Parasound Halo A 21+
The ATI AT525NC has more channels (5 vs 2) and costs less ($3,995 vs $5,000). The Parasound Halo A 21+ is rated for more power (300 W vs 200 W per channel) and handles lower speaker loads (2 Ω vs 4 Ω).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| AT525NC | Halo A 21+ | |
|---|---|---|
| Speakers it drives | 98 of 98 | 98 of 98 |
Specs side by side
Values that differ are bold. A dash means that model doesn't publish the spec.
| AT525NC | Halo A 21+ | |
|---|---|---|
| Channels | 5 | 2 |
| Power | 200 W at 8 Ω | 300 W at 8 Ω |
| Lowest impedance | 4 Ω | 2 Ω |
| Inputs | RCA, XLR | RCA, XLR |
| Size | 17×6×16 in | 18×8×20 in |
| Power at 4 Ω | 300 W | 500 W |
| MSRP | $3,995 each (MSRP, September 2026) | $5,000 each (MSRP, September 2026) |
| Weight | — | 32.2 kg (71 lb) |
Every spec and pairing: ATI AT525NC, Parasound Halo A 21+.
Try either one in your own room.
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References
- ATI AT525NC: Owner's manual, av-techsolutions.co.uk, retrieved September 15, 2026
- ATI AT525NC: Retailer listing, referenceaudiovideo.net, retrieved September 15, 2026
- Parasound Halo A 21+: Spec sheet, parasound.com, retrieved September 15, 2026
- Parasound Halo A 21+: Manufacturer product page, parasound.com, retrieved September 15, 2026
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