Hi and welcome. Today we’ll have a ‘First look’ at the Purifi Audio EVAL5 Mono 1ET9040BA Deluxe Eval Kit. Stay tuned!
Kind of product?
The Purifi Audio EVAL5 Mono 1ET9040BA Deluxe Eval Kit is a high-performance audio evaluation kit designed for DIY audio enthusiasts and professionals. It is centered around the Purifi 1ET9040BA, a state-of-the-art Class D amplifier module from Purifi’s second-generation Eigentakt technology.
Brand?
Purifi Audio is a Danish company founded by audio engineering experts, specializing in cutting-edge Class D amplifier modules and transducer technology for high-fidelity audio systems. Their products, like the Eigentakt amplifiers and high-performance drivers, are renowned for ultra-low distortion, exceptional efficiency, and transparent sound reproduction.
Current price?
The Purifi Audio EVAL5 Mono Deluxe kit is currently available in the online Purifi Audio shop for 835 EUR per kit, VAT excluded.
What’s in the box?
The Purifi Audio EVAL5 is an evaluation kit consisting of one amplifier module (1ET9040BA), a enhanced mono front-end board (FE05) and a cable set. Purifi delivered 2 finished sets, completed with Hypex SMPS1200A180 power boards and aluminum housing with heatsinks, ready to use as a pair of class-D mono power amplifiers.
Features?
The 1ET9040BA is a mono, Bridge-Tied-Load (BTL) Class D amplifier module that delivers high power output: 375 Watts at 8 Ohm, 750 Watts at 4 Ohm and up to 1.400 Watts at 2 Ohm. It features ultra-low distortion (THD+N of 0.00006%) and a signal-to-noise ratio (SNR) of 140dB. What about a flat frequency response independent of load, ensuring transparent and accurate sound reproduction across the audio spectrum.
The FE05 is an enhanced Mono Front-End Board. It includes a discrete, ultra-low-noise pre-gain stage with selectable gain options of 13.5dB, 20dB, 23dB, 26dB and 27dB, with a bypass option for flexibility in system integration. It also provides signal processing and control, simplifying connectivity for power supply and speaker outputs.
The cable set includes all necessary cables for connecting the amplifier module, front-end board, power supply and speakers, making it user-friendly for DIY applications.
Closer look?
The sleek aluminum amplifier housing has a red LED on the front panel that indicates operation. The engraved P is a nice hint to the Purifi brand. The rear panel holds all the connections: power mains, fuse, XLR and RCA analog input and Neutrik speakon speaker connection. Now, look inside at that beautiful amplifier module, Front-End board, power board and cable set…
For whom is this product?
The Purifi Audio EVAL5 kit is tailored for DIY audio projects, such as building custom amplifiers for home audio systems, studio monitors, or audiophile-grade setups. It allows users to evaluate the performance of the module and integrate it into their designs with minimal setup complexity. The kit’s flexibility makes it suitable for both prototyping and final installations. It’s ideal for high-fidelity audio systems, capable of driving demanding speakers, including those with low impedance or high sensitivity, without introducing noise or distortion.
First impression?
The 1ET9040BA module provides exceptional clarity, low noise, and minimal distortion, delivering a detailed and transparent soundstage with deep bass, smooth mids, and clear highs. The goal was to get every last detail out of every music track. Boy did the guys from Purifi succeed!? Not only is this mono power amp extremely powerful, it presents a pitch-black background and breathes every musical nuance into the room.
Conclusion?
Not for nothing that they call this product the 2nd generation Eigentakt. The first generation already was an ear opener. Purifi kicks it up a notch and offers us the best kit they can produce at this time. A true delight for us audiophiles !
Frequently asked questions
How much power does the 1ET9040BA module deliver, and does it change with speaker impedance?
Yes — output scales with load: 375 W at 8 ohms, 750 W at 4 ohms, and up to 1,400 W at 2 ohms, so the amount of power available depends on what speakers you connect it to.
Can the input sensitivity be adjusted to match different source components?
Yes — the FE05 front-end board offers five selectable gain settings (13.5dB, 20dB, 23dB, 26dB and 27dB) plus a bypass option, letting you match the kit’s input sensitivity to whatever preamp or source you’re pairing it with.
Do you need to assemble the EVAL5 kit yourself, or does it come pre-built?
The kit itself is meant for DIY assembly, but the units used for this First Look arrived as two finished, ready-to-use mono power amps — complete with Hypex SMPS1200A180 power boards and an aluminum housing with heatsinks already fitted.
How low is the distortion and noise floor on the 1ET9040BA module?
Very low by any standard: THD+N of just 0.00006%, with a signal-to-noise ratio of 140dB — figures Purifi ties to its second-generation Eigentakt technology.
Does the module’s frequency response change with the speaker load?
No — the 1ET9040BA is specified with a flat frequency response independent of load, which is what allows it to stay transparent and accurate across the audio spectrum regardless of the speaker connected.
