{"id":21459,"date":"2026-08-22T11:10:33","date_gmt":"2026-08-22T09:10:33","guid":{"rendered":"https:\/\/audio-2g.com\/?p=21459"},"modified":"2026-08-19T11:33:12","modified_gmt":"2026-08-19T09:33:12","slug":"iotavx-sa3-integrated-amplifier-and-pa3-power-amplifier","status":"publish","type":"post","link":"https:\/\/audio-2g.com\/en\/iotavx-sa3-integrated-amplifier-and-pa3-power-amplifier\/","title":{"rendered":"IOTAVX SA3 Integrated Amplifier and PA3 Power Amplifier"},"content":{"rendered":"\t\t
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When I test a product, I tend to do the opposite of what many people do: my priority list starts with listening to the product, then I look up technical information about it, and only at the very end do I check its price list. <\/em>At the very least, this approach\u2014which may not necessarily make the test any easier\u2014allows you to listen to the object with as little interference as possible.<\/em>Sometimes, when trying to assess the value relative to the purchase price, there are surprises\u2014both positive and negative\u2014and it\u2019s not uncommon to be disappointed by a price that\u2019s truly exorbitant compared to what the product has to offer. I have to say that, in recent years, this has unfortunately happened quite often, especially when it comes to products from Western brands. <\/em>Well, in the case of the IOTAVX SA3 integrated amplifier and the PA3 power amplifier, I can confidently say that this was not the case, given their meticulous build quality and listening room performance that is anything but ordinary\u2014especially considering a price point I would describe as top-tier.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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The design of the IOTAVX SA3 integrated amplifier is largely dominated by its large alphanumeric display.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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WHO IS IOTAVX?<\/h2>

It is a British brand founded by Ian Vermeulen, who in 2023 handed the company over entirely to two German engineers. In fact, the IOTAVX<\/a> team is still based in England, but over the years it has become increasingly integrated with the German distributor HifiPilot, whose directors, Berthold Daubner and Jens H\u00f6rmann, are now directly involved in the conception and design of IOTAVX products. Development, however, remains primarily the responsibility of the team in England, while the products are assembled in Germany. In short, it is still possible to design and manufacture high-quality, affordable Hi-Fi electronics in Europe without having to turn to the Land of the Dragon. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The construction of the SA3 does not feature any innovative solutions, but it is nonetheless well-made and neat. <\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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IOTAVX SA3 Integrated Amplifier and PA3 Power Amplifier: Technical Analysis<\/h2>

The IOTAVX amplifiers utilize proven Class AB circuits, with well-sized linear power supplies\u2014in the case of the two products under review, delivering about 50 watts into an 8-ohm load. However, the stroke of genius, in my opinion, is the complete integration of the two electronic units, which\u2014for essentially double the cost\u2014allows you to double the available power, since the IOTAVX SA3 integrated amplifier features a preamp output capable of driving the power amplifier, which, of course, is identical to the power stage of the integrated amplifier. The two units can be set up in mono, with each driving a separate channel, or alternatively, they can be set to stereo mode for passive bi-amping (or active bi-amping if, of course, you have an electronic crossover). Personally, I recommend using them in mono mode; this will give you a substantial doubling of power and a tangible improvement in sound quality, which we\u2019ll discuss shortly. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The IOTAVX PA3 power amplifier is\u2014essentially\u2014the power amplification section of the SA3 housed in a separate enclosure. Obviously, it lacks a volume control. <\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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It\u2019s worth noting the inclusion of an MM phono stage and a coaxial digital input, as the SA3 features a Wolfson DAC; unfortunately, it lacks a USB input, though the tone controls are a welcome addition. Finally, an optional Bluetooth module can be added, allowing for wireless playback from a smartphone or tablet. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Close-up of the SA3's rear panel showing the input\/output section. In the foreground is the MM phono input. <\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The craftsmanship struck me as well above the asking price, reflecting a certain attention to detail that is based\u2014above all\u2014on substance. In fact, at first glance, the two items seem to be priced at least twice as much. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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LISTENING (IOTAVX SA3)<\/h2>

The listening test began with the integrated amplifier, followed by the power amplifier. Initially, it drove my Triangle Stella ES speakers, a delightful, high-quality two-way French speaker, and was then tested with the Klipsch La Scala 2s, which, while not requiring massive power to perform at their best, do demand a high-performance amplifier and are utterly unforgiving of any shortcomings in the upstream components. The sound of the IOTAVX reminded me\u2014and I mean this as a compliment\u2014of certain Naim amplifiers, a brand I think everyone knows for embodying a neutral sound that\u2019s never over the top: the classic English sound, coupled with excellent dynamic range. In fact, from the very first notes, there\u2019s an air of composure\u2014one of restraint and elegance\u2014without any fanfare or sonic pandering. <\/p>

Since we\u2019re in the middle of the European Track and Field Championships as I write this, I\u2019d compare this amplifier to an excellent decathlete\u2014one who, as such, can do everything well without excelling in any single event. Whether you put a javelin in his hand, a shot put, or have him run the 1.5-kilometer race on the track, he does it all\u2014obviously without matching the performance of true specialists, but we\u2019re still talking about a podium-caliber athlete. So the sound produced by this IOTAVX SA3 is well-rounded but doesn\u2019t excel in any particular area, which results in a musical performance without any obvious flaws\u2014and I\u2019d say it\u2019s very mature. In essence, it\u2019s an amp you can listen to for hours on end without any annoyance. The detail and transparency aren\u2019t mind-blowing, but they\u2019re sufficient to let you hear everything contained in the track, without artificial embellishments, and the musical texture is smoothed out just enough to give you a true sense of the instrument, complete with its harmonics. We\u2019re definitely a far cry from certain Chinese amplifiers that make detail their strong suit, though often at the expense of musicality and sonic realism, resulting in a somewhat artificial sound. <\/p>

Thus, the IOTAVX SA3 stands as a direct descendant of that very British sonic philosophy, which makes fluidity and neutrality its hallmarks, maintaining a balance that is never compromised by any exaggeration\u2014a quality that always makes listening a pleasure. I won\u2019t dwell on individual tonal characteristics\u2014all frequency ranges offer clean, undistorted sound\u2014but discussing them would distract from the uniformity of this amplifier\u2019s sound, which is its greatest strength. I\u2019d just like to note that the bass is sufficiently deep and powerful, but above all, well-articulated and dynamic. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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View of the rear panel of the IOTAVX SA3 integrated amplifier. The unit features a built-in DAC with optical and coaxial inputs. <\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The phono input, as well as the built-in DAC, turned out to be rather basic, and we should view them primarily as an initial option available to the customer; later on, if interested in better performance, the customer can opt for separate components. Now, if it cost 1,000 euros, I\u2019d say it\u2019s an excellent choice and absolutely in line with what we can expect from an amplifier in this price range, but since it costs 500, I\u2019d definitely say it has very few competitors\u2014and of those I\u2019ve heard, none boasts such a convincing balance. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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LISTENING SESSION 2: IOTAVX SA3 and PA3<\/h2>

If you dig out another 400\u20ac or so from your wallet\u2014bringing your total spending well below 1,000\u20ac\u2014you can pair the integrated amp with the IOTAVX PA3 power amp. Well, make a few sacrifices, set aside a little something each month, but\u2026 do it. This combination proves to be an absolute winner and thoroughly convincing in every respect. <\/p>

When set to mono mode, the two electronic components take the sound to a whole new level and elevate the system\u2019s performance to a much higher class. The sound gains depth and dynamics, and the measured pace of the music we heard with just the integrated amplifier gives way to a more nuanced and focused reproduction. Everything\u2014and I mean everything\u2014improves significantly, and the tracks initially listened to with just the ITAVX SA3 come to life in a different way\u2014certainly more fully realized\u2014with a tangible and easily perceptible leap in quality. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The PA3's input section is limited to the Amp In and Pre Out connections.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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It is not just the increase in available power that matters in this case, even though it allows the amplifier to drive the speaker at medium-to-high levels with a certain margin without any difficulty\u2014as might have been the case with the integrated amplifier alone\u2014 but the quality of the reproduction benefits above all in terms of dynamic contrast, while respecting the tonal character, which remains very consistent; above all, there is a greater impact from the lower frequencies, which are certainly more powerful but also more extended. The soundstage, which tended to collapse at high listening levels, now remains solid and convincing\u2014proof that the extra watts really do make a difference, even with the Klipsch speakers. <\/p>

Essentially, the sound of the integrated amplifier alone is significantly \u201cenriched,\u201d though its distinctive characteristics remain intact and unaltered; it is the same sound, but expressed in a more assertive and vibrant manner. The leap in class achieved by pairing the two components makes the price-to-performance ratio even more striking, placing this combination among mid-range amplifiers while maintaining a very affordable price. In short, we\u2019re now dealing with a decathlete who wins the gold medal; while unable to compete with the top specialists, he\u2019s capable of performing excellently in every discipline, with no obvious weaknesses. <\/p>

I must say that I\u2019m delighted to see products that offer users such high-quality sound at a price that\u2019s absolutely within most people\u2019s reach, especially in an era like the present one, where pricing \u201ccommon sense\u201d seems to have gone off the rails. The integrated amp alone can be an excellent starting point, one that might attract buyers disappointed by the latest \u201cChinese knockoff of the month,\u201d (of course, I greatly appreciate certain Asian products that can introduce many enthusiasts to true Hi-Fi at a fraction of the cost) by providing them with a solid starting point, because the SA3 sounds exactly as an amplifier should. <\/p>

With the adoption of the PA3, it will be possible\u2014even at a later stage\u2014to make that leap in quality that we all feel the need for sooner or later, reaching a level that, for some enthusiasts, may be the ultimate one\u2014and to go beyond that, one will have to dig deep into their wallet.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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IOTAVX SA3 and PA3: Conclusions<\/h2>

A very down-to-earth amplification. It may not impress you at first, but it certainly won\u2019t wear you out, and it will add a touch of pleasure to your music, making every listening experience enjoyable. In this sense, the IOTAVX SA3 and PA3 are, metaphorically speaking, among the most accessible amplifiers available today, while still representing a serious approach to true \u201cHi-Fi for everyone.\u201d <\/p>

Paolo Di Marcoberardino<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Specified Technical Data<\/h2>

SA3 Amplifier<\/strong><\/p>

Continuous Power Output (Stereo):<\/strong> 45 Watts x 2CH (20 Hz \u2013 20 kHz, <0.07%, 8 \u03a9): 90 Watts x 2CH (20 Hz \u2013 20 kHz, <0.07%, 4 \u03a9)
Continuous Power Output (Mono\/Bridged): <\/strong>100 Watts x 1CH (20 Hz \u2013 20 kHz, <0.07%, 8 \u03a9) 180 Watts x 1CH (20 Hz \u2013 20 kHz, <0.07%, 4 \u03a9)
Total Harmonic Distortion:<\/strong> < 0.02% @ 1 kHz
Frequency Response:<\/strong> 20 Hz \u2013 100 kHz
Input Sensitivity – Line Inputs:<\/strong> 200 mV
Input Sensitivity \u2013 Phono Input:<\/strong> 2.5 mV
Input Overload – Line Inputs:<\/strong> 4V
Signal-to-Noise Ratio (IHF \u201cA\u201d):<\/strong> > 100 dB
Channel Separation – Line Inputs:<\/strong> > 80 dB
Standby Power Consumption:<\/strong> < 0.5W
Power Requirements – AC:<\/strong> AC 230 V \/ 50 Hz, AC 115 V \/ 60 Hz (SELECTABLE)
Power Consumption:<\/strong> 220 W Maximum
Dimensions – Main Unit:<\/strong> 432 mm x 240 mm x 59 mm (W x D x H)
Weight – Main Unit:<\/strong> 6.5 kg<\/p>

PA3 Power Amplifier<\/strong><\/p>

Continuous Power Output (Stereo):<\/strong> 45 Watts x 2CH (20 Hz \u2013 20 kHz, <0.07%, 8 \u03a9): 70 Watts x 2CH (20 Hz \u2013 20 kHz, <0.07%, 4 \u03a9)
Continuous Power Output (Mono\/Bridged): <\/strong>100 Watts x 1CH (20 Hz \u2013 20 kHz, <0.07%, 8 \u03a9) 140 Watts x 1CH (20 Hz \u2013 20 kHz, <0.07%, 4 \u03a9)
Total Harmonic Distortion:<\/strong> < 0.02% @ 1 kHz
Frequency Response:<\/strong> 20 Hz \u2013 100 kHz
Input Sensitivity – Line Inputs:<\/strong> 200 mV
Input Sensitivity \u2013 Phono Input:<\/strong> 2.5 mV
Input Overload – Line Inputs:<\/strong> 4V
Signal-to-Noise Ratio (IHF \u201cA\u201d):<\/strong> > 100 dB
Channel Separation – Line Inputs:<\/strong> > 80 dB
Standby Power Consumption:<\/strong> < 0.5W
Power Requirements – AC:<\/strong> AC 230 V \/ 50 Hz, AC 115 V \/ 60 Hz (SELECTABLE)
Power Consumption:<\/strong> 220 W Maximum
Dimensions – Main Unit:<\/strong> 432 mm x 240 mm x 59 mm (W x D x H)
Weight – Main Unit:<\/strong> 6.5 kg<\/p>

Distributor for Italy:<\/strong> Audio Video s.a.s.<\/a>, Largo Cesare Campana No. 2 (FFSS Station), Mondov\u00ec 12084 (CUNEO), ITALY, Tel. 0174 670100<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

https:\/\/youtu.be\/hqayRSljbUs When I test a product, I tend to do the opposite of what many people do: my priority list starts with listening to the product, then I look up technical information about it, and only at the very end do I check its price list. At the very least, this approach\u2014which may not necessarily […] More<\/a><\/p>\n","protected":false},"author":4,"featured_media":21460,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[2069,2161,255],"tags":[448,532,633,664,535,536,666,452,2162,665,545],"ppma_author":[2148],"class_list":["post-21459","post","type-post","status-publish","format-standard","has-post-thumbnail","category-integrated-amplifiers","category-preliminary-final","category-reviews","tag-amplificatore-integrato-en","tag-amplificatori-en","tag-audio-3-en","tag-audiohifi-en","tag-britishsound-en","tag-dac-en","tag-evidence","tag-integrated-amplifier-en","tag-iotavx","tag-review-en-2","tag-reviews-en"],"yoast_head":"\nIOTAVX SA3 Integrated Amplifier and PA3 Power Amplifier - Audio 2G<\/title>\n<meta name=\"description\" content=\"Learn more about the IOTAVX SA3 integrated amplifier and PA3 power amplifier. 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