Choosing Your Amphion Floorstander
Amphion designs loudspeakers around a consistent set of ideas, and these three floorstanders share that same DNA. Every model here uses a 1 inch titanium dome tweeter set into Amphion's 5th generation U/D/D (Uniformly Directive Diffusion) waveguide, and each mates that tweeter to its bass drivers at a 1,600 Hz crossover point. The result across the lineup is a controlled, even dispersion pattern designed to reduce early reflections and keep the sound consistent whether you are seated in the sweet spot or moving around the room.
Specifications compared
| Specification | Argon 3LX | Argon 7LX | Krpyton 3X |
|---|---|---|---|
| Design | Two way, passive radiator floorstanding loudspeaker | Two way, passive radiator floorstanding loudspeaker | Three way, vented flagship floorstanding loudspeaker |
| Tweeter | 1 inch titanium dome tweeter in Amphion's 5th generation U/D/D (Uniformly Directive Diffusion) waveguide | 1 inch titanium dome tweeter in Amphion's 5th generation U/D/D (Uniformly Directive Diffusion) waveguide | 1 inch (25.4 mm) titanium dome tweeter in Amphion's 5th generation U/D/D (Uniformly Directive Diffusion) waveguide |
| Woofer | One 6.5 inch aluminum woofer augmented by a passive radiator | — | One 10 inch side firing aluminum cone woofer |
| Frequency Response | 30 to 55,000 Hz (-6 dB) | 28 to 55,000 Hz (-6 dB) | 21 to 55,000 Hz (-3 dB) |
| Sensitivity | 85 dB | 91 dB | 89 dB (2.83 V / 1 m) |
| Nominal Impedance | 8 ohms | 4 ohms | 4 ohms |
| Recommended Amplifier Power | 50 to 250 watts | 50 to 300 watts | 100 to 300 watts |
| Crossover Frequency | 1,600 Hz | 1,600 Hz | — |
| Enclosure | Two way, passive radiator loaded floorstanding cabinet | Two way, passive radiator loaded floorstanding cabinet | Three way, vented (rear ported) cabinet; midrange in cardioid loaded internal chambers |
| Dimensions | 995 x 234 x 344 mm (39.17 x 9.2 x 13.54 inches) with base plate; 967 x 190 x 305 mm without base plate | 1157 x 234 x 344 mm (45.55 x 9.2 x 13.54 inches) with base plate; 1120 x 190 x 305 mm without base plate | 1400 x 330 x 480 mm (55.12 x 13 x 18.9 inches) with base plate; 1370 x 240 x 470 mm without base plate |
| Weight | 21 kg (46.3 lbs) each | 27 kg (59.5 lbs) each | 70 kg (154.3 lbs) each |
| Finishes | Standard White, Full White, Black, Walnut | Full White, White with Black, Walnut, Full Black | Standard White, Full Black, Walnut |
| Woofers | — | Two 6.5 inch aluminum woofers augmented by passive radiator loading | — |
| Midrange | — | — | Two 8 inch ribbed papyrus cone midrange drivers in separate cardioid loaded chambers |
| Crossover Frequencies | — | — | 160 Hz and 1,600 Hz |
Where the models diverge is scale. The Argon 3LX, Argon 7LX, and Krypton 3X step up in driver count, bass extension, and cabinet size, so the right choice depends heavily on your room, your amplifier, and how you like to listen. This guide walks through each one and then matches them to real situations.
The Models Compared
Amphion Argon 3LX
The Argon 3LX is a two way, passive radiator floorstander built around a single 6.5 inch aluminum woofer augmented by a passive radiator. It is the most compact of the three at 995 x 234 x 344 mm (with base plate) and 21 kg (46.3 lbs) each, with a frequency response of 30 to 55,000 Hz (-6 dB). Rated at 85 dB sensitivity and an 8 ohm nominal impedance, it asks for 50 to 250 watts and slots in as the entry point to floorstanding Amphion here. It comes in Standard White, Full White, Black, and Walnut.
Amphion Argon 7LX
The Argon 7LX takes the same two way, passive radiator concept and doubles the bass drivers to two 6.5 inch aluminum woofers with passive radiator loading. At 1157 x 234 x 344 mm (with base plate) and 27 kg (59.5 lbs) each, it reaches slightly deeper to 28 to 55,000 Hz (-6 dB). Its 91 dB sensitivity and 4 ohm nominal impedance make it noticeably more efficient than the 3LX, and it accepts 50 to 300 watts. Finishes are Full White, White with Black, Walnut, and Full Black.
Amphion Krypton 3X
The Krypton 3X is the flagship of this trio, a three way, vented (rear ported) design that moves to a far larger scale. It pairs the same tweeter with two 8 inch ribbed papyrus cone midrange drivers in separate cardioid loaded chambers and a single 10 inch side firing aluminum cone woofer, using crossover points at 160 Hz and 1,600 Hz. It extends down to 21 to 55,000 Hz (-3 dB), carries an 89 dB sensitivity and 4 ohm nominal impedance, and wants 100 to 300 watts. At 1400 x 330 x 480 mm (with base plate) and 70 kg (154.3 lbs) each, it is a substantial statement piece available in Standard White, Full Black, and Walnut.
Which Should You Buy by Scenario
I have a small or medium room and want floorstanding sound that does not overwhelm
Choose the Argon 3LX, since its single 6.5 inch woofer, passive radiator, and compact 995 x 234 x 344 mm cabinet deliver full range presentation (30 to 55,000 Hz at -6 dB) without demanding the space or output of the larger models.
I have a larger room or listen at higher levels and want more bass authority
Step up to the Argon 7LX, whose two 6.5 inch woofers and deeper 28 Hz low end (-6 dB) give it more effortless output in bigger spaces, while its 91 dB sensitivity means it plays louder for a given amount of power than the 3LX.
I want a reference, no compromise system and have the room for it
The Krypton 3X is the answer here, as its three way layout with dual 8 inch cardioid loaded midranges and a 10 inch side firing woofer reaches down to 21 Hz (-3 dB) and is engineered as the flagship of this lineup for dedicated, larger listening rooms.
My amplifier is on the modest side
The Argon 7LX is the friendliest of the three for lower powered amplifiers thanks to its 91 dB sensitivity, though note it presents a 4 ohm nominal impedance, while the Argon 3LX at 85 dB and 8 ohms is an easier load but less efficient, and the Krypton 3X asks for at least 100 watts.
I want isolated midrange detail and the most resolving presentation in the range
The Krypton 3X stands apart because it is the only three way here, placing its two 8 inch papyrus midranges in separate cardioid loaded chambers and adding a dedicated 160 Hz crossover point that hands bass duties to the 10 inch woofer.
A Note on Matching and the Rest of the System
Amplifier matching tracks closely with the specs. The Argon 3LX (85 dB, 8 ohms, 50 to 250 watts) is a straightforward load but benefits from a healthy amplifier to reach its potential, while the Argon 7LX (91 dB, 4 ohms, 50 to 300 watts) is more efficient yet prefers an amplifier comfortable driving 4 ohms. The Krypton 3X (89 dB, 4 ohms, 100 to 300 watts) both expects real power and rewards it. For placement, remember the Krypton 3X is rear ported and will want breathing room behind it, whereas the passive radiator Argon models are more flexible near a wall. Given the U/D/D waveguide on all three, taking care with toe in and listening distance pays off across the lineup.
Come Listen at AEA
The best way to understand how these three Amphion floorstanders differ is to hear them in person at the All Elite Audio showroom in Timonium, Maryland. Bring your favorite music and we will help you match a model to your room and system. Demo units rotate, so please reach out ahead of your visit to confirm which of these speakers are set up when you plan to come in.