REL HT 1205 MKII 500 Watt Subwoofer - Black

REL HT/1205 MKII 500W Subwoofer – Black

The REL HT/1205 MKII Subwoofer is built for people who want proper home cinema bass — the kind you feel as much as hear. Designed specifically for .1/LFE channel use, it focuses on delivering fast, deep and controlled low frequencies without the slow, boomy character that cheaper subwoofers often produce.

This is a subwoofer that prioritises precision just as much as power.

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Purpose-Built for Home Cinema

Unlike many subs that try to balance music and movies, the HT/1205 MKII is tuned specifically for home theatre. That means it’s engineered to handle sudden dynamic shifts — explosions, impacts, deep rumbles — without losing control.

REL uses dedicated home theatre input filters to keep bass flat and consistent, even at very low frequencies. This ensures effects sound natural and extended, rather than exaggerated or muddy.

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500W Class D Amplifier – High Current, Real Control

The 500-watt Class D amplifier isn’t just about volume — it’s about delivering sustained power with stability.

• High current design keeps the driver under control at all times
• Maintains clarity even during demanding scenes
• Efficient operation reduces heat and energy waste

This allows the subwoofer to play louder for longer without strain, which is especially important in action-heavy films or gaming.

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12” CarbonGlas™ Driver – Why It Matters

The newly developed 12-inch CarbonGlas™ driver is a key upgrade.

CarbonGlas combines lightweight materials with stiffness, which means:

• The cone moves quickly (fast transient response)
• It stops just as quickly (no overhang or “boom”)
• Bass notes remain distinct instead of blending together

In real use, this translates to:

• Punchy kick drums
• Clear bass lines in music
• Sharp, impactful movie effects

You’re not just hearing bass — you’re hearing detail within bass.

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Reaches Deep – Clean Output Into the 20Hz Range

This subwoofer comfortably extends into the low 20Hz region, which is where you start to feel bass rather than just hear it.

REL’s internal filtering (including subsonic filtering) helps:

• Remove unwanted infra-noise from soundtracks
• Reduce distortion at extreme low frequencies
• Allow the driver to perform more efficiently

The result is deep, usable bass, not just theoretical low-end numbers.

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PerfectFilters™ – Controlling the Details

REL’s PerfectFilters™ system plays a big role in sound quality.

Instead of boosting bass artificially, it:

• Shapes frequency response for accuracy
• Keeps distortion levels low
• Ensures bass integrates naturally with your speakers

This is why instruments like bass guitar or drums sound realistic, rather than like a generic low-frequency thump.

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Up to 50% More Output Than Previous Generation

Compared to its predecessor, the HT/1205 MKII delivers significantly more output.

This isn’t just louder — it means:

• Greater headroom (less distortion at high volumes)
• More authority in large rooms
• Better performance during demanding scenes

Even at lower listening levels, that extra headroom improves clarity and control.

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Cabinet Design – Built for Stability

The cabinet isn’t just about looks — it’s engineered to minimise unwanted resonance.

• Line-grained composite construction adds rigidity
• Reduces vibration and cabinet flex
• Keeps bass tight and controlled

The design also includes:

• Rounded edges to reduce visual bulk
• Aluminium-style finish with gloss top panel

So it looks clean and modern while doing serious acoustic work behind the scenes.

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Optional HT-Air Wireless System

If cable routing is difficult, REL’s HT-Air wireless system offers a high-performance alternative (sold separately).

Key advantages over typical wireless solutions:

• Zero compression signal (no audio quality loss)
• Very low latency (around 16–20ms)
• Far more accurate timing than Bluetooth

This ensures bass stays perfectly in sync with your speakers and on-screen action.

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Full Control for Room Integration

Getting bass right depends heavily on placement and room acoustics. REL makes adjustment straightforward:

• Level Control – Sets overall bass volume
• Crossover Control – Matches the sub with your speakers
• Phase Switch – Aligns timing if placement is behind or off-axis
• Auto Power On – Turns on when signal is detected

All controls are clearly labelled and positioned for easy access.

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Seamless System Integration

If you already use REL subwoofers from their Reference, Serie S or T/x ranges, the HT/1205 MKII works perfectly as a dedicated LFE (.1) channel sub.

This allows you to:

• Keep musical bass separate and clean
• Add cinematic impact without affecting your main system balance

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Key Features

• 500W high-current Class D amplifier
• 12” CarbonGlas™ driver for fast, accurate response
• Designed specifically for home theatre (.1/LFE use)
• Deep bass extension into the 20Hz range
• PerfectFilters™ for low distortion and realism
• Up to 50% more output than previous model
• Rigid, vibration-resistant cabinet design
• Optional HT-Air wireless connectivity
• Adjustable crossover, phase and level controls

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A More Refined Kind of Power

The REL HT/1205 MKII doesn’t rely on brute force alone. It combines speed, control and depth, delivering bass that feels cinematic but remains precise and composed.

If you want a subwoofer that adds real impact without sacrificing clarity, this is where it stands out.

• REL HT/1205 MKII Subwoofer Specs Sheet
• REL HT/1205 MKII Subwoofer User Manual

What's in the Box?

• REL HT/1205 MKII Subwoofer, Black
• Mains lead
• User manual

Technical Specifications

Type	Closed box, front-firing driver
Active driver size and material	12 in., 300mm long-throw, CarbonGlas™ cone structure, inverted carbon fibre dust cap, steel chassis
Passive radiator size and material	N/A
Low frequency extension	-6dB at 22 Hz
Input connectors	Dual-purpose low-Level stereo RCA or LFE RCA
Output connectors	Daisy Chain low-Level stereo RCA or LFE RCA
Power output	500 watts (RMS)
Amplifier type	NextGen5 Class D
Wireless capability	HT Air Wireless (Optional), Zero Compression Single Large Scale Integrated Chip
Dual parametric filter	N/A

Protection System

Fully electronic set safe	Yes
D.C. fault	Yes
Output short	Yes
Mains input voltage	220-240 volts, 110-120 volts for certain markets
Fuses	4 Amp semi delay 230b, 4 Amp semi delay 115b operation

Appearance

Dimensions (W x H x D)	16.25 x 15.25 x 17.25 (413mm x 387mm x 438mm)
Net weight	43.2 lbs. (19.6kg)
Finish	Horizontally Oriented Lined Grained Black Composite Cabinet, 15mm Top Plate, finished in 5 coats of Hand rubbed High Gloss Black Lacquer
Product code	HT/1205 MKII
EAN	857316005638

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