About the Graham Audio Chartwell Sub 6

Designed by Derek Hughes and hand-built using Graham Audio’s signature thin-wall, damped cabinet construction, the Chartwell Sub 6 is sold in matched pairs to complement LS3/5 and LS3/5a loudspeakers. Available exclusively in black – a finish that blends effortlessly with any system – each enclosure is meticulously tuned to extend low-frequency performance without compromising the clarity and natural balance that these classic monitors are known for.

Front-facing reflex ports deliver tight, articulate bass that integrates seamlessly with your main speakers, adding scale, depth and authority to your music. With the Sub 6 handling the most demanding low-end content, your LS3/5 or LS3/5a can perform with greater ease and refinement across the rest of the frequency range.

Features

  • Passive design — no separate amp, clean aesthetic
  • Front-facing reflex port — seamless placement and easy integration
  • High-quality crossover components — air-core inductors and polypropylene caps preserve clarity and minimize distortion
  • Rear amplifier input and speaker output — simple, elegant signal pass-through
  • Adjustable feet or spikes — optimise placement and stability
  • Designed to match LS3/5 and LS3/5a — matches perfectly in tonal balance and sensitivity

Frequently Asked Questions

Does the sub require a separate amp?

No – it’s passive. You connect your existing amp to the subs, then feed your main speakers, keeping cabling clean and straightforward.

Where should I place the Sub 6?

Ideally directly under your LS3/5 or LS3/5a, using the included feet or optional spikes. The front port allows flexibility in tight setups.

Will the extra bass harm my nearfield listening?

The Sub 6 is designed for musical extension, not boom. If placement causes bass buildup, you can adjust toe-in or move them further away from the wall.

Does the Sub 6 allow me to play my LS3/5 or LS3/5A at higher volume levels?

Yes. By crossing over at 120 Hz, the Sub 6 takes the most demanding low-frequency work away from your LS3/5 or LS3/5A. This not only extends bass performance but also frees the midrange to sound cleaner and more dynamic, allowing higher playback levels without strain.

Specifications

Attributes Value
Brand

Graham Audio
Colour

Black Oak
Audio Inputs

Gold-plated speaker binding posts
Audio Outputs

Gold-plated speaker binding posts
Crossover

4th order bandpass, 120 Hz
Frequency Response

35 Hz – 100 Hz
Impedance

8 Ω
Sensitivity

84 dB
Recommended Amplifier Power

30 W – 80 W
Dimensions (W x D x H)

190 x 270 x 600 mm

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