Gotham Audio BWPA-4 Power Amp Review: the polite beast that bites hard
Testing out the new Gotham Audio BWPA-4 power amplifier, running in bridge mode into Polk Legend L800s. Front end: Yamaha RX-A2060 (not my first pick for stereo, but for a living-room theatre it does the job) in Pure Direct, with an Xbox One X as the media player. This thing has the goods. First session: detail, control, and “wait… that was always in the recording?” I’ve had the L800s on Luxman, NAD, and others over the years, and not much has made them stand up and demand attention like this. The amount of detail coming through is wild. Even at low volume the bass stayed tight and controlled. With twin 10" drivers you usually need more grunt before they wake up, but here it was already fast, responsive, and properly gripped. Tracks early on: Tool – 10,000 Days / The Pot / Rosetta Stoned. On “10,000 Days” that thunderstorm intro felt 20 metres wide — real atmosphere and space. It just went on forever, the kind of ambience that makes you forget you’re in a lounge room. “Rosetta Stoned” is often a glorious mess, but here it had layers: deep, wide soundstage, super engaging — the only time I’ve heard it better was live. Then Röyksopp – “Running to the Sea”… instant “turn it up and get lost” energy 😄 I told myself I’d stop there. I didn’t. The Weeknd & Swedish House Mafia – “Moth To A Flame”… oh my. His voice was delicate and powerful at once, floating in the mix but still anchored. One of those tracks that makes you grin because you know it’s going to thump tomorrow night. Ok… I have to stop now! (Spoiler: I didn’t.) New Year’s Eve: the “find the limit” torture test. Playlist chaos (five music lovers): Gaga to Tool, Avicii to Snoop, Röyksopp to Limp Bizkit. Three neurodivergent music lovers in the room, throwing tracks like artillery shells. The playlist was dialled in and the volume level was high — the dB meter right up where I usually call it. Playlist here: https://open.spotify.com/playlist/3fMHfrMKFhesB72kPT8MnK?si=56ae1ad79a2b4af0
The sound was huge, controlled, and powerful. The funny part: it didn’t feel harsh or shouty. It wasn’t “loud”… it was just big. SPL was right where I’d normally tap out, but it stayed clean and composed, so your brain registers scale and impact more than fatigue. We went four hours straight at “party war” levels before the final straw: Tool – “Forty Six & 2”. That last build-up was too much. The speakers wanted to give more than the amp’s thermal load could sustain in that configuration. We found the limit. Perspective: the standard AVR that normally runs these Polks wouldn’t have lasted a track at that level, let alone four hours. I’m extremely lucky my neighbours are tolerant. (If you live next door and you’re reading this: thank you, and I’m sorry.) As a cinema designer (and lifelong music tragic), part of the job is knowing where the limit is when I’m specifying gear — not just how it sounds at polite levels, but how it behaves when you lean on it. And bridging into a 2.8-ohm speaker is brutal. It demands serious current, and heat becomes the boss fight. Also—almost definitely not what the manufacturer had in mind 😄 This was a deliberate stress test to find the limit, not a “do this at home forever” recommendation. I found its limit, had backup ready, and the party continued… just not quite as loud and dynamic. The takeaway wasn’t that it has a limit (everything does). It was how glorious the climb to that limit was. The Polks showed a life and punch they’d never had before, and the BWPA-4 kept its grip right up until the moment physics tapped it on the shoulder. Living with it: ten days of “wow”. I’ve left it on the Polks for about 10 days and it keeps delivering moments where you just laugh and go “yep… that’s why power and control matter”: Minecraft sounds genuinely immersive (yes, Minecraft… and yes, it matters). I watched Guillermo del Toro’s Frankenstein and some of the creature yells were spine-tingling — the BWPA-4 gave them that “in the room” snap. Creature vocals and effects have that “reach out and grab you” realism when a system has proper control and headroom. The Witcher Season 4, Episode 3 had some of the most dynamic TV soundtrack work I’ve heard in ages, and this amp made the swings feel effortless.
Verdict: Would I specify this amp? Absolutely — it’ll feature in a cinema spec soon. Would I buy it? Yep. Should you? If you want a high-powered beast with real control, without tearing your wallet in half, the BWPA-4 deserves a serious look. If you’ve got hungry speakers, this feeds them without drama. No drama, just drive. The team at Gotham have clearly put serious time into this. An Australian company bringing a power amp to market at a price point that challenges the big players? Brave. Bravo.
Links: BWPA-4: https://gothamaudio.com.au/.../gotham-audio-bwpa-4-power.../
| Polk Legend L800: https://www.polkaudio.com/.../legend-l800-right/125059.html
— Mark Callenberg
The Audi...
