REL HT/1205 MKII 500W Subwoofer – White 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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 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 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. What's in the Box? REL HT/1205 MKII Subwoofer, White 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 White Composite Cabinet, 15mm Top Plate, finished in 5 coats of Hand rubbed High Gloss White Lacquer Product code HT/1205-MKII-WHITE EAN 0857316005744 REL HT 1205 MKII 500 Watt Subwoofer - White, REL, HT, 1205, MKII, 500, Watt, Subwoofer, -, White, HT1205MKII-WH, REL HT1205MKII-WH, HT-1205, REL ACOUSTICS HT1205, ht1205 II, ht/1205, rel ht/1205