IOTAVX B:ound: 200 Essential Watts, Compact Amplifier

IOTAVX B:ound squeezes a genuine class-B stereo power amplifier into one of the smallest chassis the brand has built, measuring just 164 x 75 x 238mm yet rated at 200W into 4 ohms per channel. IOTAVX pitches B:ound as proof that compact and high-end are not mutually exclusive, aimed at listeners who want serious power without a full-size amplifier taking over the rack — a different route to compactness than CANOR’s recently launched Crius H5S.

IOTAVX B:ound Fits 200 Watts Into a Shoebox-Sized Chassis

Where many compact amplifiers trade away power or linearity to hit a small footprint, IOTAVX says IOTAVX B:ound’s class-B output stage holds distortion to 0.0002% at 100W into 8 ohms, with a bandwidth of 700kHz and a slew rate of 40V/µs. A fast switching power supply and an onboard microcontroller monitor the amplifier’s operating conditions continuously, letting IOTAVX keep the enclosure small without sacrificing the stability a linear design would normally need more chassis volume to guarantee.

IOTAVX B:ound stereo power amplifier rear panel with RCA inputs and binding posts — B:ound keeps connections simple: RCA inputs, binding post outputs, and a trigger input alongside the auto-on switch.

Automatic Power-On and a Sub-0.5W Standby Draw

IOTAVX B:ound switches itself on as soon as it senses an audio signal at its RCA inputs, with a 12V trigger input available as an alternative for systems that start everything together. Left idle, IOTAVX B:ound settles into a standby mode drawing less than 0.5W, and a flashing power LED warns of excess heat before an automatic thermal cutoff protects the circuit if the warning goes unheeded. IOTAVX positions B:ound equally as a standalone stereo amplifier and as a way to relieve an AV receiver’s internal amplification when driving a pair of front speakers.

IOTAVX B:ound internal circuit board and power supply components — Inside the compact chassis: a dedicated power supply board and class-B amplifier modules.

At 2.4kg and rated for both 115V and 230V operation, IOTAVX B:ound is built to travel between systems as easily as it sits permanently in one, with RCA-only inputs keeping the connection scheme as uncomplicated as the chassis itself. IOTAVX frames the amplifier’s size as a deliberate design constraint rather than a limitation, arguing that the compactness opens up living rooms, home offices, and studio spaces that would otherwise rule out a dedicated power amplifier.

Pricing and availability

IOTAVX B:ound is listed at €549 (down from a €699 launch price), available for pre-order now through IOTAVX’s official product page at German retailer HifiPilot, with delivery expected from 2 November 2026.