rel.net

Choose a REL Planar subwoofer if your room is a shared living space where a conventional box subwoofer would be impractical or visually intrusive—Planar's ultra-thin profile can be wall-mounted, placed behind furniture, or integrated into a designed interior. Choose a traditional REL subwoofer (Reference Series, Serie S, or HT models) if you have a dedicated listening or home theater room where maximum output and low-frequency extension matter more than footprint. The deciding factors are placement flexibility, room size, and how much you're willing to let the subwoofer be visible.

The core difference: form factor vs. output ceiling

REL's own framing of Planar is that it "redefines how bass lives within a room," with an ultra-thin profile that allows wall-mounting, placement behind furniture, or integration into living spaces "where traditional subwoofers would be impractical." That is a placement-and-aesthetics argument, not a claim that Planar outperforms REL's box designs.

REL describes its Reference Series (No.36 at $12,000 and No.35 at $10,000, per the site) as "the pinnacle in subwoofer design and engineering—the absolute maximum in power, finesse and beauty on offer." Serie S is positioned as a step above REL's previous mid-level range, "able to elevate higher-end systems in medium to large rooms." So the traditional lineup is where REL places its highest output and performance claims.

When Planar is the right call

Pick Planar if any of these describe your situation:

• The subwoofer has to share a room with daily life. REL's Brendan Fallis listening event was held in a New York home, and the brand's stated intent was to demonstrate Planar "in the environment it was designed for—real living spaces where exceptional sound and thoughtful design coexist."
• You have no usable floor corner. Planar's wall-mount and behind-furniture options solve the problem of a room where a box subwoofer would block traffic, sit in a walkway, or fail the visual test.
• Interior design is a real constraint. The Hans Lorei feature on rel.net shows Planar integrated into a designed home, with the argument that "the best systems disappear into the room, leaving only the experience."
• You want bass in a room that isn't a theater. If your system is a living-room stereo or a multi-purpose media setup, Planar's flexibility is the point.

When a traditional REL is the right call

Pick a conventional REL subwoofer if:

• You have a dedicated room. Serie S is explicitly aimed at "higher-end systems in medium to large rooms," and Reference is REL's maximum-performance tier. These are the models to evaluate when the room exists for sound.
• Output and extension are the priority. REL positions Reference as the top of its range in "power, finesse and beauty." If you're chasing the deepest, loudest bass REL makes, that's where the brand points you.
• You're building a home theater. REL's site describes its subwoofers as built for both stereo and home theater systems, and the HT/1205 MKII appears in a musician collaboration (Jon Vinyl) as a way to unlock "deeper bass and a more immersive listening experience." HT-series models are the natural starting point for movie-first systems.
• You can place a box properly. Traditional subwoofers reward correct corner or wall-adjacent placement; if your room allows that, you're not paying a flexibility premium.

How to decide in practice

Work through these in order:

1. Mark the spots where a subwoofer could physically go. If the only viable positions are on a wall, behind a sofa, or inside a cabinet run, Planar is the realistic option.
2. Ask whether the room is shared or dedicated. Shared → Planar. Dedicated → traditional.
3. Estimate room volume. REL ties Serie S to "medium to large rooms." If your space is large and you need high output, a box design is the safer match.
4. Decide how visible you'll tolerate. Reference subwoofers are styled as objects in their own right, but they still occupy floor space. Planar is designed to be absorbed into the room.
5. Check the current lineup and pricing on rel.net before committing. The site lists Reference No.36 at $12,000 and No.35 at $10,000, and shows a "Shop All Subwoofers" entry point; Planar pricing isn't given in the material available here, so confirm it directly.

A note on the two questions this answers

If you're also trying to understand how REL's series differ (Reference vs. Serie S vs. Planar), the short version is: Reference is the maximum-performance tier, Serie S is the mid-level range built for higher-end systems in medium-to-large rooms, and Planar is a different category defined by thin-profile placement flexibility rather than output leadership. And if you're new to the site, rel.net is REL Acoustics' official store and content hub—you can browse subwoofer series, read interviews and installation stories, and purchase directly, with free shipping stated on all orders.

REL Acoustics organizes its subwoofers into distinct series, and the differences come down to three things: performance tier, physical form, and how the subwoofer is meant to sit in a room. Reference Series sits at the top as the brand's highest standard in power, finesse, and appearance. Serie S is positioned as a mid-level range that still outperforms anything REL has previously offered at that tier, aimed at higher-end systems in medium to large rooms. Planar is a different category altogether: an ultra-thin subwoofer designed to be wall-mounted, placed behind furniture, or integrated into living spaces where a traditional subwoofer would be impractical. If you are choosing between them, the deciding factors are your room size, your existing system's level, and whether physical footprint or interior integration matters more than raw output.

Reference Series: the top of the range

REL describes Reference Series as "the pinnacle in subwoofer design and engineering" and "the absolute maximum in power, finesse and beauty on offer." The current lineup named on the site includes the No.36 at $12,000 and the No.35 at $10,000, with the No.32 and No.31 also presented as representing the pinnacle of the series.

Choose Reference if:

• You are building or upgrading a system where the subwoofer is expected to be the reference point for the rest of the chain.
• Budget is not the primary constraint — these are the highest-priced models shown.
• You want the series REL itself frames as its highest standard rather than a step toward it.

The trade-off is cost and physical presence. These are full-size subwoofers, not design-integrated ones, so they assume you have the space and the system to justify them.

Serie S: mid-level performance for larger rooms

Serie S is described as combining "a higher performance level than we have ever set out to deliver within our mid-level range," with the explicit purpose of elevating higher-end systems in medium to large rooms.

Choose Serie S if:

• Your room is medium to large and you need output that fills it.
• Your existing system is already at a higher-end level and you want a subwoofer that keeps pace without moving to the Reference tier.
• You want more performance than an entry-level subwoofer but do not need the flagship series.

The key phrase is "medium to large rooms." Serie S is positioned around room volume and system level, so it is the middle path: more capable than the entry point, less extreme than Reference.

Planar: a different category, not just a lower tier

Planar is not simply a cheaper subwoofer — it is a different design premise. REL and John Hunter (in a PALE BLUE Magazine interview) describe Planar as "a groundbreaking new category of subwoofer that blends high-performance audio with modern interior design." Its ultra-thin profile allows it to be wall-mounted, placed behind furniture, or integrated into living spaces where traditional subwoofers would be impractical.

Choose Planar if:

• Floor space is limited or a conventional subwoofer box would disrupt the room.
• You want bass that integrates into the room's design rather than sitting in it as a separate object.
• You are willing to accept the constraints of a thin-profile form factor in exchange for placement flexibility.

REL's own framing supports this: the brand's stated philosophy is that "when bass is done right, it disappears. Everything else comes alive." Planar is the series that takes that idea literally in physical terms.

Side-by-side comparison

How to decide

Work through these in order:

1. Can a conventional subwoofer physically work in your room? If not — if it would block a walkway, sit awkwardly, or fail aesthetically — Planar is the series built for that problem.
2. How large is the room? Serie S is explicitly aimed at medium to large rooms. If your room is smaller, the larger series may be more than the space can use well.
3. How high is the rest of your system? Serie S is positioned to elevate higher-end systems. Reference is positioned above that, as the maximum REL offers.
4. What is your budget ceiling? Reference models shown on the site run $10,000–$12,000. If that is out of range, Serie S is the next tier down, and Planar is a separate design choice rather than a budget step.

The honest summary: Reference is the flagship, Serie S is the mid-level workhorse for bigger rooms and better systems, and Planar is the answer when the room itself — not the budget — is the constraint.

REL Acoustics uses "disappears" to describe bass that you stop noticing as a separate sound source. The subwoofer isn't meant to call attention to itself with boom or rumble; it's meant to fill in the low end so seamlessly that the rest of the system—speakers, room, recording—sounds more complete. On rel.net the brand states this directly: "When bass is done right, it disappears. Everything else comes alive." The claim is about integration, not output. A subwoofer set up this way adds weight, foundation, and ambience without making you aware a subwoofer is running.

What "disappearing" actually means

In practice, "disappearing" bass has three observable traits:

• No localization. You shouldn't be able to point to the subwoofer as the source of low frequencies. Bass should seem to come from the main speakers or from the room itself.
• No boom or bloat. The low end supports the music or soundtrack rather than dominating it. Kick drums and bass lines gain body, not mud.
• No gap at the crossover. The transition between main speakers and subwoofer is smooth, so instruments and voices keep their natural weight as they move down in frequency.

The phrase "everything else comes alive" follows from this. When the subwoofer handles the lowest octaves cleanly, the main speakers and amplifier are freed from that work, and midrange and treble often sound clearer and more open.

Why REL frames it as a philosophy, not a feature

REL presents this idea as the through-line of the brand, not a single product spec. The site's history feature, "PALE BLUE Dives Into The History of REL," traces the company from Richard Edmund Lord's first design in Wales to the present, describing "over 35 years of pursuing bass that doesn't announce itself, it brings the entire system together." That framing matters for buyers: REL positions its subwoofers as system integrators for both stereo and home theater, rather than as standalone effects devices.

The same idea shows up in how REL talks about placement and design. In the PALE BLUE interview with John Hunter, the Planar subwoofer is described as a new category that blends high-performance audio with interior design—its ultra-thin profile allows wall-mounting, placement behind furniture, or integration into living spaces where a traditional subwoofer would be impractical. The goal is the same: bass that fits the room and the system instead of standing apart from it.

How to tell whether you're getting it

You can judge integration by listening rather than by measuring:

REL's own listening-room examples point the same way. The site's feature on a space by Hans Lorei notes that "the best systems disappear into the room, leaving only the experience," and the Jon Vinyl x REL HT/1205 MKII feature describes the artist pairing his system with that model to unlock "deeper bass and a more immersive listening experience." In both cases the subwoofer is described as enhancing the whole system, not as the thing you notice.

Where to go next on rel.net

If you want to explore the idea further before buying, the site's "REL in Focus" section collects the history article, the John Hunter interview, and the listening-room videos. These are the most direct sources for how REL explains the philosophy in its own words. From there, the product ranges—Reference Series, Serie S, and Planar—each apply the same integration goal to different room sizes and installation needs, which is the practical question to answer next: which series fits your space and system.

REL Acoustics is a maker of powered subwoofers for stereo and home theater systems, and rel.net is its official online store and brand site. You can browse subwoofer lines, read the brand's history and artist interviews, and buy directly — the site states free shipping on all orders. If you are evaluating a subwoofer for a two-channel or surround system, the site is the primary source for the current lineup; if you want third-party measurements or comparisons, you will need to look elsewhere.

What REL Acoustics makes

REL builds powered (active) subwoofers — the amplifier is inside the cabinet, so the sub takes a line-level or speaker-level signal and drives its own woofer. The site positions them for both stereo and home theater use, and describes wireless capability as a feature of its home theater subwoofers.

The design philosophy stated on the homepage is a useful filter for whether the brand matches what you want: "When bass is done right, it disappears. Everything else comes alive." In other words, REL sells subwoofers as a way to complete a system rather than as a standalone effect. That framing matters if you are choosing between a sub that is meant to integrate unobtrusively and one bought for maximum output per dollar.

The product lines on the site

The homepage organizes the catalog into named series rather than a flat list. The main ones visible there:

Two things worth noting from this structure. First, the price gap is large — the Reference models listed are five-figure products, so the range is not a single-tier catalog. Second, Planar is the line the site treats as its newest category: an interview with John Hunter describes it as a subwoofer with an ultra-thin profile that can be wall-mounted, placed behind furniture, or integrated into living spaces where a conventional sub would not fit. If your constraint is floor space or a shared living room rather than raw output, that is the line to read first.

The site also lists accessories and add-ons, including a Premium Wood Grille (listed from $0 to $2,994) and an Airship Direct at $399.

What else the site offers beyond the shop

rel.net mixes commerce with editorial content, which is unusual for a subwoofer brand and useful if you want context before buying:

• Brand history — a feature on how REL began, tracing back to Richard Edmund Lord's first design in Wales and covering "over 35 years" of the company's approach.
• Designer and integrator features — for example a home installation by Hans Lorei showing Planar integrated into a living space.
• Artist features — a Toronto R&B artist, Jon Vinyl, paired with an HT/1205 MKII; and a launch listening event with Brendan Fallis in a New York home.
• Interviews — including a magazine interview with John Hunter on the Planar category.

These are marketing content, not independent reviews, so treat the performance claims as the manufacturer's own. Their practical value is showing real installation contexts — behind furniture, wall-mounted, in a normal living room — which is often the hardest thing to judge from a spec sheet.

How to use the site to make a decision

1. Start from your room and system, not the price list. The site segments by room size and system tier (Serie S for "medium to large rooms," Reference for top-tier systems). Match that first.
2. Check the Planar line if placement is your limiting factor. The wall-mount and behind-furniture options are the specific problem it is presented as solving.
3. Read the installation features before the spec pages. Seeing Planar in a furnished room tells you more about whether it fits your space than a dimension list does.
4. Buy through the official store if you want the free-shipping terms stated on the site; checkout is handled on-site.

What the site does not tell you

The homepage and the material available here do not include third-party measurements, direct comparisons against competing brands, or independent verification of the performance claims. Pricing is shown for some models (Reference No.36 and No.35, Airship Direct, the wood grille range) but not for every line, so you will need to open individual product pages for current figures. If your decision depends on measured output, distortion, or in-room response, plan to supplement what rel.net provides with independent testing.

REL Acoustics builds powered subwoofers for stereo and home theater systems, and the main decision is which series fits your room, your existing system, and your space. The brand's own framing is that good bass "disappears" and lets everything else come alive, so the practical question is not just output but integration. REL's lineup spans the Reference Series at the top, Serie S in the mid range, and Planar as a newer, space-flexible category — plus home theater models like the HT/1205 MKII. Prices shown on rel.net range from $399 (Airship Direct) up to $12,000 (Reference Series No.36), so the range you're shopping in matters before anything else.

Start with room size and system level

REL describes its series by the systems and rooms they're built for, which gives you a rough filter:

If your room is medium to large and your system is already high-end, Serie S is the intended step. If you want the absolute maximum and budget allows, Reference is the top tier. If your constraint is physical space rather than performance, look at Planar first.

Decide whether you need a traditional box or a Planar

This is the biggest fork in the decision, and it's about placement, not just sound.

Traditional REL subwoofers (Reference, Serie S, HT models) are the conventional powered box design. They need floor space and some room to breathe.

Planar is described by REL as a "groundbreaking new category" with an ultra-thin profile. According to the PALE BLUE interview with John Hunter, Planar can be wall-mounted, placed behind furniture, or integrated into living spaces where traditional subwoofers would be impractical. A designer showcase on rel.net (Hans Lorei) makes the same point from the interior side: the best systems disappear into the room.

Choose Planar if:

• You have no good floor position for a box subwoofer
• The room is a shared living space where a large cabinet would be intrusive
• You want the subwoofer to read as part of the interior rather than as equipment

Choose a traditional model if:

• You have a dedicated listening or theater room
• You want the maximum output and the Reference/Serie S tiers
• You're matching a specific home theater model like the HT/1205 MKII

Match the subwoofer to stereo vs. home theater use

REL makes subwoofers for both stereo and home theater systems, and the same series can serve either — but the priority differs:

• Stereo/music-first: integration and speed matter more than raw output. REL's own language ("when bass is done right, it disappears") points at blending with the main speakers rather than dominating.
• Home theater-first: output and immersion matter more. The HT/1205 MKII is the model REL highlights in a home theater context, paired by Toronto R&B artist Jon Vinyl for "deeper bass and a more immersive listening experience."

If you run both, decide which use you'd regret compromising, and weight the series choice toward it.

Check the physical and visual fit

Before choosing a model, confirm:

1. Available floor or wall space — a box subwoofer needs a footprint; Planar needs a wall or a gap behind furniture.
2. How visible you want it — REL's own marketing leans on subs that blend into designed spaces, so if the room is styled, Planar's thin profile is the relevant feature.
3. Room size — REL ties Serie S to medium and large rooms; if your room is small, that's a reason to look at the more flexible options rather than the largest model.

Budget and buying

Prices visible on rel.net:

• Reference Series No.36 — $12,000
• Reference Series No.35 — $10,000
• Airship Direct — $399
• Premium Wood Grille — from $0 to $2,994 (an accessory, not a subwoofer)

REL's site states free shipping on all orders and operates an official online store with checkout on rel.net. No payment platforms or financing terms are listed in the available material, so confirm those at checkout if they matter to you.

A short decision path

1. Is floor space the problem? → Planar.
2. Is it a dedicated high-end system with budget to match? → Reference Series.
3. Medium-to-large room, high-end system, want strong mid-tier performance? → Serie S.
4. Home theater immersion is the goal? → HT/1205 MKII.
5. Then confirm the exact model's price and availability on rel.net before ordering.

The one thing worth doing before you commit: measure the actual space you'd give the subwoofer. REL's range is wide enough that the room, not the spec sheet, usually makes the decision.