LOUDSPEAKERSELAC2026-08-1112 min

ELAC Concentro S 507: scale, directivity control and the discipline of placement

ELAC’s slim Concentro S 507 hides four side-firing woofers behind an unusually composed front. The source consensus is powerful: huge spatial precision and deep bass, provided the room and system are chosen with equal care.

ModelConcentro S 507

AuthorHiFi Grail Editorial

TagsFloorstanding speakers, JET tweeter, High-end, Used hi-fi, Directivity control

ELAC Concentro S 507 — scale, directivity control and the discipline of placement

The ELAC Concentro S 507 was introduced at roughly €11,998 per pair and is now discontinued, but it remains an unusually ambitious four-way floorstander: four side-firing woofers, a dedicated low-mid unit and ELAC’s concentric JET/high-mid assembly in a cabinet only 27 cm wide. This is a source-based analysis, not a personal listening report. The material points to a consistent proposition: the S 507 can produce bass scale, image specificity and fine detail normally associated with larger statements, provided its room and amplifier are treated as part of the product.

Device DNA

The defining trait is not simply “detail”. It is the combination of a concentrated high-frequency image with a surprisingly physical low end. The JET 5c and aluminium high-mid module are intended to keep timing and spatial cues coherent, while four 150 mm woofers put real air movement into a slim enclosure. Directivity Control Rings make the high-mid radiation pattern tunable in small steps. That is a rare admission that the interface between loudspeaker and room matters as much as the driver count.

The result, in the language shared by the reviews, is a large but disciplined presentation. The S 507 is not designed to add a warm blanket to a system; it shows recording texture and source quality, yet reviewers do not generally describe its resolution as abrasive. Its essential tension is therefore attractive and practical: wide bandwidth and very high information retrieval, with a need for intelligent placement rather than decorative placement.

Quick decision profile

Strengths: unusually deep, quick bass for the frontal footprint; expansive, precisely organised imaging; serious build and a useful directivity adjustment. Reservations: 88 dB sensitivity and a 3 Ω impedance minimum invite a stable amplifier; the bass can overfill a small or poorly prepared room; the DCR rings refine a setup but do not fix it.

It fits listeners building a committed two-channel room, especially those who value orchestral scale, electronic bass and a sharply focused centre image. It is a less natural fit for a 16–20 m² room with limited placement freedom or for a low-current integrated chosen mostly for convenience.

Construction, specification and real requirements

ELAC specifies a 4-way bass-reflex system, 24 Hz–50 kHz bandwidth, 4 Ω nominal impedance, 3 Ω minimum at 360 Hz, 88 dB sensitivity and recommended amplification from 60 to 500 W per channel. Each speaker measures 1220 × 270 × 380 mm including spikes and weighs 37 kg. The published crossover points are 120, 400 and 2600 Hz. The system uses four 150 mm aluminium-sandwich woofers, a 180 mm AS-XR low-midrange driver, a 50/130 mm aluminium high-mid system and a JET 5c folded-ribbon tweeter. These are primary specifications from ELAC.

The unusual part is the architecture. The low frequencies are distributed over side-mounted woofers rather than announced by a broad front baffle. Above them, the highly localisable bands are concentrated on the front. That division helps explain why listeners can hear both mass and an unusually precise soundstage, but it also explains why proximity to side boundaries deserves attention. A 24 Hz published extension is not a promise that every room will be better with more bass; it is a warning that room modes are now part of the audition.

Directivity Control Rings sit around the high-mid section. ELAC presents them as a way to adapt radiation to the room; Testberichte’s summary of Stereoplay and Lite-Magazin likewise treats the rings as a subtle, useful adjustment rather than an effect switch. Start with the neutral ring, establish speaker and seat geometry, then make one change at a time. It is more repeatable than moving a 37 kg cabinet by millimetres, but it should follow—not replace—basic setup.

Parameter	Published value
System	4-way bass reflex
Drivers	4 × 150 mm woofer; 180 mm low-mid; 50/130 mm high-mid; JET 5c
Frequency range	24 Hz–50 kHz
Sensitivity / impedance	88 dB / 2.83 V/m; 4 Ω nominal, 3 Ω minimum
Power recommendation	60–500 W per channel
Size / mass per speaker	1220 × 270 × 380 mm; 37 kg

What reviewers say

The strongest professional consensus concerns space, bass and the absence of obvious strain. Stereoplay, reported by Testberichte, called the spatial presentation wide and holographic, with unusually precise voices, while also noting that placement needs work. Lite-Magazin’s summary identifies precision, detail and a deep, forceful bottom end. Neither claim should be read as a universal room result; together, they establish the ambition of the design.

HiFi.nl frames the S 507 as a balanced, full and powerful all-rounder with a pleasant but not dominant character. That matters because it moderates a simplistic “hyper-detailed ribbon speaker” stereotype. Bonsaimachos similarly describes a speaker that does not initially call attention to itself, then reveals low-level details and scale; the author also reports that low-bitrate material was not automatically made unpleasant. These are individual listening reports, but their overlap with the Dutch review suggests resolution that serves organisation rather than spectacle.

HomeTheaterHiFi adds useful measurement context. Its near-field plots showed strong 40–70 Hz energy, consistent with the listening impression of powerful extended bass. The reviewer found the off-axis response smoother with less toe-in than usual and measured low distortion around 0.64% at 100 dB for both 1 kHz and 5 kHz tests. This is not a complete spinorama and should not be treated as one, but it supports two practical conclusions: the speaker has clean level capability, and toe-in is an actual tuning control. HiFi Voice independently notes the 4 Ω nominal load, 3 Ω dip and 88 dB sensitivity—numbers which make amplifier stability more relevant than headline wattage alone.

Macro paper-cut illustration of the white S 507’s JET tweeter and faceted high-midrange module

Voice of the community

Community evidence is much thinner than the professional review record, so it should carry less weight. Still, it is directionally useful. An owner on Aktives Hören chose the S 507 after a dealer comparison involving Dynaudio Contour 60i, Monitor Audio PL 200 II, DALI Epicon 6 and Bowers & Wilkins 804 D4, driven by an AVM Ovation CS 6.3. That does not prove superiority; it confirms that buyers genuinely cross-shop the S 507 with serious, similarly positioned passive floorstanders.

The same owner later opened an S 507 thread at Sonus Apparatus as a very satisfied owner. On the Polish Audiostereo discussion, contributors explicitly caution that the model may be problematic in 16 m². This aligns with the professional warnings and is the more useful long-term takeaway than blanket praise: ownership satisfaction appears strong when the room is adequate, but scale does not erase acoustics.

The two radars

The Tonal balance axis is slightly on the vivid, controlled side rather than warm; Bass is a major part of the design, deep and quick but room-sensitive. Midrange benefits from the concentrated front architecture, while Treble has the speed and extension expected of JET without a strong consensus of harshness. Dynamics and Soundstage are central strengths; the latter deserves its high placement because multiple reviews describe stable, expansive imaging. Resolution is also high, but it is framed as retrieval rather than forensic aggression. Timbre is generally natural, albeit not deliberately lush. Value is lower only because the original price was premium and the model now needs a careful used-market comparison.

On the acoustic radar, Quiet listening is strong because the design retains scale and information at modest level in the available reports. Loud listening is stronger still, supported by driver area and the published distortion results. Transparency is high. Lack of fatigue is good but conditional on room, toe-in and recording. System demand is significant: 3 Ω, substantial bass and side woofers call for thought. Tolerance of weak recordings is better than one might predict from the resolution, though poor sources are not hidden.

Who it especially fits

For the listener with a 25–45 m² dedicated room and a high-current integrated or power amplifier, the S 507’s proposition is unusually coherent: it gives physical low end without a visually huge front baffle. It also suits the listener who enjoys changing placement and then hearing that work pay off in image focus.

For orchestral, acoustic and vocal material, the appeal is the simultaneous scale and localisation described by Stereoplay. For electronic, rock and large-scale cinema music, the four-woofer system offers grip and impact. In both cases, the sensible approach is to audition at the intended distance from side and rear walls.

It is a qualified match for a flexible living room rather than a dedicated room. An owner can certainly use it there, but the smallest room should not be chosen on cabinet width alone. A smaller loudspeaker plus carefully integrated subwoofer can be the more controllable route.

Market positioning and real alternatives

The S 507 was positioned beneath ELAC’s much larger Concentro statements but above the Vela line, effectively offering Concentro driver technology and styling in a domestically narrower form. Its true alternatives are not defined by a score but by priorities. The Aktives Hören owner comparison makes Dynaudio Contour 60i, Monitor Audio PL 200 II, DALI Epicon 6 and B&W 804 D4 credible audition candidates.

Choose the Dynaudio direction when a listener values a more conventional front-radiating layout and a different balance of cabinet volume versus bass integration. Choose Monitor Audio Platinum when its own ribbon/MPD presentation and finish appeal, not because it is a numerical substitute. DALI Epicon 6 offers a route for listeners prioritising its distinctive midrange approach and less unusual bass distribution. B&W 804 D4 is attractive for those who prefer its compact, familiar premium form factor and available dealer network. The S 507’s differentiator remains the combination of DCR tuning, concentrated image and four side woofers.

Paper-cut three-quarter illustration of a white Concentro S 507 with stylised side woofers

Version line

Model	Position
Concentro S 507	Original model analysed here; JET 5c, discontinued
Concentro S 507.2	Later revision; do not assume direct part-for-part equivalence

The S 507 should be purchased on its own evidence, not as a discounted proxy for the later S 507.2. Confirm the exact model, finish, rings, spikes and packaging. The predecessor’s potential value lies in a mature design with a known setup profile; its risk is that it needs a room and amplification budget commensurate with its original class.

System synergy and room fit

Begin with a stable amplifier comfortable into 4 Ω and able to remain composed near the 3 Ω region. ELAC’s 60–500 W recommendation is deliberately broad, so watts alone are not a buying rule. The useful question is whether the amplifier has current delivery and control at real listening levels. The AVM pairing in the Aktives Hören owner report is a meaningful example of a premium, capable integrated, not a universal prescription.

Give the speakers lateral breathing room, then experiment with toe-in. HomeTheaterHiFi’s off-axis finding and Stereoplay’s placement warning make this more than ritual. Avoid treating the rearward base and narrow frontal width as permission to push the cabinet into a corner. In a smaller room, start with conservative bass expectations, modest playback levels and gradual movements; if the 40–70 Hz region dominates, improve placement and treatment before changing rings.

At low level, the reports suggest the S 507 does not collapse into a thin outline. At high level, its driver area and measured distortion behaviour make it credible for realistic peaks. The compromise is not loudness but freedom: a good system needs enough space to let the speaker’s bass and stage become separate virtues rather than one oversized effect.