IOTAVX SA40

The IOTAVX SA40 amplifier stands out as a remarkable solution in today’s audiophile landscape. Offering a substantial power output of 2×300 watts at 4 ohms and a comprehensive array of analog and digital connections, this class AB integrated stereo amplifier delivers exceptional performance. Its approach favors efficiency over ostentation, with a rigorous technical design that has already won over several specialist publications. The versatility of the SA40 makes it a centerpiece capable of centralizing all your audio sources, from vinyl records to streaming services, including your television.

Generous Power for All Types of Speakers

The SA40 first impresses with its substantial amplification capacity. Delivering 2×150 watts at 8 ohms and doubling that power to 2×300 watts at 4 ohms, this amplifier has ample reserves to efficiently drive most speakers on the market. This generosity is largely due to the presence of an oversized toroidal transformer, ensuring stable power delivery even during the most demanding musical passages.

Even more impressive, the SA40 can operate in bridged mono mode when paired with the PA40 power amplifier from the same brand. This configuration achieves a colossal 600 watts at 4 ohms per channel, providing remarkable control over even the most difficult-to-drive speakers. An American user reports that this setup finally allowed his KEF LS50 Meta speakers to reach their full potential after four years of use, with a notable improvement in dynamics, control, and sound depth.

Exceptionally Comprehensive Connectivity

The SA40 stands out with particularly rich connectivity, making it a true nerve center for your audio system. On the analog side, there are 5 RCA line inputs, a professional-grade balanced XLR input, and a phono input compatible with both moving magnet (MM) and moving coil (MC) cartridges. This last feature is worth highlighting, as MC-compatible phono preamps are generally reserved for more expensive devices.

The digital section is equally well-equipped, with 2 optical inputs, 2 coaxial inputs, an HDMI ARC connection for easy integration with a modern TV, and Bluetooth 5.0 reception for wireless streaming from your mobile devices. The Cirrus Logic CS4398 digital-to-analog converter ensures precise conversion up to 24 bits/192 kHz, guaranteeing faithful reproduction of high-resolution digital sources.

Output options include a preamplifier output, a recorder output, a mono subwoofer output for integrating a subwoofer, and a front-panel headphone jack. The two pairs of speaker terminals allow you to power a second pair of speakers in another room.

Advanced Features for Demanding Audiophiles

The “Amp In” input is one of the most interesting features of the SA40, allowing you to either integrate an external signal processor to customize the sound or use the device as a simple power amplifier. This flexibility is valuable for audiophiles who want to experiment with different configurations or integrate the SA40 into a complex system.

The tone control offers precise adjustment of bass and treble in 1 dB steps up to ±10 dB, allowing you to tailor the sound to the acoustic characteristics of your listening room. The balance control, also finely adjustable with 10 steps in each direction, ensures optimal stereo balance.

In a home theater context, the SA40 can connect to your TV via HDMI ARC to significantly enhance the sound of your movies and TV shows. It can also serve as an amplifier for the front channels in a surround setup, thanks to its bypass input.

Technical Specifications

General Information

• Type: Stereo integrated amplifier (Class AB)
• Dimensions (W x H x D): 435 x 113 x 315 mm (height including feet)
• Weight: 9.7 kg

Performance

• Output power (RMS):
  • 150 W (8 Ω, 2 channels)
  • 300 W (8 Ω, 1 channel in bridged mode)
  • 300 W (4 Ω, 2 channels)
  • 600 W (4 Ω, 1 channel in bridged mode)
• Distortion (THD+N): <0.003% (100 W, 1 kHz)
• Signal-to-noise ratio: >110 dB (100 W, A-weighted)
• Frequency response (+/-0.5 dB): 20 Hz - 80 kHz

Connectivity

• Analog inputs:
  • 5 x RCA
  • 1 x XLR
  • 1 x phono (MM / MC)
  • 1 x amplifier input
• Digital inputs:
  • 2 x coaxial
  • 2 x toslink (optical)
  • 1 x HDMI ARC
  • 1 x Bluetooth 5.0
• Other connections:
  • Variable output
  • Trigger output

Technical Specifications

• DAC: CS4398 (24-bit, 192 kHz)
• Phono input:
  • MM: 47 kΩ, 390 pF
  • MC: 470 Ω, 470 pF

Power Supply

• Power supply: 115 VAC or 230 VAC automatic, @ 50/60 Hz
• Standby power consumption: <0.5 W