What to Consider Before Buying a REL Acoustics Subwoofer

Updated

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:

Series REL's stated positioning Best fit
Reference Series "Pinnacle in subwoofer design and engineering," maximum power, finesse, and beauty High-end systems, buyers who want the top of the range
Serie S Higher performance than REL has delivered in its mid-level range; can elevate higher-end systems Medium to large rooms
Planar Redefines how bass lives in a room; balances flexibility and performance Rooms where a traditional subwoofer is impractical
HT/1205 MKII (home theater) Used by artists to unlock deeper bass and a more immersive experience Home theater and music systems

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.