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Professional Seismic Isolation

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Vibration-Free Audio Brilliance

Elevate your audio experience with the Townshend Audio Seismic Professional Range, masterfully engineered to solve vibration issues you know—and those you don’t. From bespoke isolation for massive subwoofers at Odeon Leicester Square, ensuring flawless cinematic sound, to the curated sonic purity of the Virgin Hotel Shoreditch audio bar and the neighbor-friendly bass control at Halcyon Club in San Francisco, our solutions deliver unmatched clarity and intimacy, crafted with our expert partner, Jason Bacon of Project Audio London, to transform any music space into a vibration-free haven.
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Superior Vibration Isolation

 
The Seismic Professional leverages Townshend Audio’s proven technology, utilizing air-damped springs for exceptional vibration isolation. Unlike viscoelastic materials, our precision-engineered springs excel at handling fast transients, ensuring rapid response and unmatched clarity. This design isolates audio equipment from vibrations across all frequencies, from structural tremors to acoustic feedback, for flawless sound reproduction.
 

Why Seismic Professional?

 
Vibrations degrade sound quality, mask details, and disrupt listening environments. The Seismic Professional’s air-damped spring technology eliminates these issues with precision and speed, revealing your audio’s actual depth and emotion. With a track record of solving complex challenges in world-class venues, Townshend Audio guarantees a solution that meets your specifications.
 
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Checkout Those Videos

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HI FI PIG at the XFI 2019 uw hi fi Choice A_B test Townshend Seismic isolation

Max's Lecture on How to Combat Vibration in Audio

What our customers says about us?

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The Townshend Seismic Isolation was the easiest part of the installation. The settings were spot-on, fitting the Tannoy Westminsters like a glove, and the sound was incredible!

The Custom Podiums arrived at the installation perfectly calibrated for the Megolith speakers. It was the easiest part of a challenging day.

Kayle, Head Sound Engineer at Project Audio,

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EXPLORE INSIGHTS AND EXPERTISE

Townshend Audio Allegri Reference: A Preamplifier That Redefines Sonic Excellence

Ultrafide townshend Seismic Podium

BRISTOL HIFI SHOW 2025

HiFi+ top 100 products 20th Anniversary

Allegri+ Preamplifier Celebrated in Hi-Fi+ 20th Anniversary Top 100 Products

Attack of the Pods – Positive Feedback

The Broken Record: The Seismic Platform is the key to Classical music

HiFi Critic – Paul Messenger trys Seismic Corners

Main Stream - Master Class Dynamic Parallel AC Line Conditioner
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Main Stream – Master Class Dynamic Parallel AC Line Conditioner

£324.00

Master Class Dynamic Parallel AC Line Conditioner (MainStream)
Eliminate AC mains noise with MainStream, a parallel line conditioner designed for high-end audio and video systems. Plug it near your gear to filter interference from appliances and RF sources—no current restriction, just cleaner power. Enjoy reduced hum, hiss, and video distortion with its tuned, multi-band filters. Housed in sleek aluminum with a blue glow, it’s lab-proven, affordable, and built to last. Perfect for any setup—add multiple for larger systems. Elevate your experience today!
Category:

Description

Master Class Dynamic Parallel AC Line Conditioner (MainStream)
Elevate your high-end audio or video system with MainStream, a cutting-edge parallel AC line conditioner designed to banish interference from your home’s power lines. Everyday appliances—refrigerators, air conditioners, washers, dryers—and even external sources flood your AC mains with disruptive RF noise and energy pulses. MainStream tackles this head-on, delivering cleaner power to your components without ever restricting current flow.
Unlike traditional “series” conditioners, MainStream works in parallel—simply plug it into the mains socket nearest your equipment. It filters out interference across multiple frequency bands using a streamlined topology with minimal, high-quality components. No current passes through it, so there’s no limit to how many you can use—perfect for large systems. Say goodbye to hum, hiss, buzzing, or vibrations in your speakers, turntables, or chassis, and banish fuzzy images or moving bars from video displays.
MainStream’s tuned reactive filters target noise known to degrade audio and video performance, reducing system background noise to near-silent levels. Encased in a sleek, milled aluminum housing with a subtle blue glow to signal operation, it’s built for a lifetime of reliable service. Laboratory-proven via Fast Fourier Transform graphs, MainStream offers premium performance at a reasonable price—no resonant transformers, just pure interference elimination.
Key Features:
  • Reduces AC mains noise across multiple frequency bands
  • Enhances audio clarity and video quality
  • Parallel design: no current restriction, scalable for any system
  • Durable milled aluminium case with blue operational glow
  • Affordable, long-lasting, and lab-tested for effectiveness
Transform your listening and viewing experience with MainStream—clean power, made simple.
For global compatibility, each Main Stream  includes a high-quality British Standard 3-pin adapter. Experience cleaner power, enhanced equipment performance, and peace of mind with Main-Stream™—where disruptive noise meets its match.
V.A.T will be added at the checkout

Additional information

Weight 0.55 kg
Dimensions 10 × 10 × 5 cm

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frequently asked questions

The Seismic Professional is an advanced vibration isolation system designed to eliminate disruptive vibrations in professional audio environments and high-end home hi-fi setups. Using precision-engineered air-damped springs, it ensures rapid response to fast transients, delivering pristine sound clarity for speakers, turntables, amplifiers, and more.
Unlike viscoelastic materials, our air-damped springs provide superior isolation by efficiently absorbing and dissipating vibrations across all frequencies. The springs respond instantly to dynamic audio signals, preserving transient accuracy and preventing structural or acoustic interference from degrading sound quality.
 
The Seismic Professional is highly versatile and can be customized for:
  • Professional studios and cinemas, such as our Dolby Atmos subwoofer platform at Leicester Square.
  • Commercial venues, like the Hi-Fi bar at Virgin Hotel, Shoreditch.
  • Residential setups, including music rooms on sailboats.
  • Environments with bass leakage issues, as solved at the Hyalson Club in San Francisco, where neighbor complaints were eliminated.
 
Yes. Our custom platforms are designed to isolate low-frequency vibrations, preventing bass notes from transmitting to adjoining rooms or buildings. For example, we resolved bass leakage at the Hyalson Club, ensuring powerful audio without disturbing neighbors.
Absolutely. Our team designs bespoke platforms to suit your specific needs, whether for a single component, a large speaker array, or a unique setup like a music room on a sailboat. We tailor load capacities, dimensions, and configurations to match your equipment and environment.
 
The Seismic Professional supports a wide range of audio components, including:
  • Floor-standing and bookshelf speakers
  • Subwoofers
  • Turntables
  • Amplifiers and preamps
  • Digital sources like DACs and streamers Platforms are scalable to accommodate weights from lightweight electronics to heavy professional arrays.
Our air-damped spring technology outperforms viscoelastic systems by offering faster transient response and broader frequency isolation. This ensures dynamic audio signals remain crisp and undistorted, making the Seismic Professional ideal for high-fidelity and professional applications.
 
No. The Seismic Professional features a tool-free, intuitive setup process. Each platform includes adjustable components and clear instructions, allowing for quick integration into any space. Our team also offers consultation for complex installations.
We use aerospace-grade materials, including high-strength alloys and precision-machined components, to ensure durability, stability, and aesthetic elegance. The design complements high-end audio setups while withstanding rigorous use.
Visit Townshend Audio for detailed product information, or email sales@townshendaudio.com (mailto: mail@townshendaudio.com) to request a quote or schedule a consultation. We’re here to design the perfect isolation solution for your needs.
Yes, we ship worldwide. Contact our sales team for details on availability, shipping, and installation support in your region.

Townshend Audio’s mechanical low pass filter exemplifies true decoupling, offering a level of vibration isolation that far surpasses conventional attenuation methods. By effectively isolating components from vibrations down to below 3 Hz, Townshend ensures that high-fidelity audio systems perform at their best, free from the distortions caused by external vibrations.

Our team will work with you to assess your equipment, space, and audio goals. Contact us at sales@townshendaudio.com (mailto:sales@townshendaudio.com) or complete our online consultation form to receive personalized recommendations.

Townshend Audio’s mechanical low pass filter exemplifies true decoupling, offering a level of vibration isolation that far surpasses conventional attenuation methods. By effectively isolating components from vibrations down to below 3 Hz, Townshend ensures that high-fidelity audio systems perform at their best, free from the distortions caused by external vibrations.

Yes. Notable installations include:
  • A custom platform for the Dolby Atmos subwoofer array at Leicester Square, delivering immersive bass without structural interference.
  • A tailored solution for the Virgin Hotel’s Hi-Fi bar in Shoreditch, enhancing sound quality while maintaining a peaceful environment.
  • A vibration isolation platform for the Halcyon Club in San Francisco, resolving bass disturbances to satisfy neighbors.

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Unlock a world of pure, unadulterated happiness with our products—don’t lose touch with us now, and let us elevate your audio experience to blissful heights

Our Location

7 Bridge Road, East Molesey

Phone Number

0044 (0) 208 979 2155

Email Address

mail@townshendaudio.com

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Seismic Platform: How it works

The Townshend Seismic Isolation Platform uses patented Seismic Load Cell™ technology to shield your hi-fi equipment from vibrations that degrade audio quality. Sensitive components like turntables, DACs, and amplifiers are vulnerable to disturbances from footsteps, speaker feedback, or even global microtremors. By acting as a low-pass mechanical filter, the platform isolates vibrations as low as 3Hz across all planes. This ensures your music remains free from jitter, noise, and distortion, delivering a soundstage with exceptional clarity and precision.

Enhanced Audio Fidelity for Every Component

 
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Vibrations compromise the performance of critical hi-fi components,

such as a record player’s stylus tracking microscopic grooves or a DAC’s crystal oscillator maintaining timing accuracy. The Townshend platform stabilizes these devices, preserving their intended performance. The result is razor-sharp transients, deeper bass, and a level of detail that reveals nuances in your music you may never have noticed. Whether you’re an audiophile or a casual listener, this platform transforms your system’s output into a more immersive experience.
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Seismic Podium

Elevate your audio with the Townshend Podium and Seismic Range, where cutting-edge isolation banishes vibrations down to 3Hz.
These engineering marvels deliver a pristine, immersive soundstage, freeing your music from the distortions of the floor beneath.
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Why Choose Isolda Speaker Cables?


Most speaker cables in the audio industry overlook the science of transmission line theory, resulting in micro-reflections that smear and veil the purity of sound. These reflections bounce between the source and speaker, muddying the music you love. The Isolda DCT Speaker Cable eliminates this issue through its unique geometry, closely matching the impedance of your amplifier and speakers. The result? A crystal-clear soundstage, lifelike 3d imaging, and seismic bass that transforms your listening experience.

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Engineered for Audiophile Perfection

Crafted by hand in small batches, Townshend Isolda cables feature closely spaced, insulated flat copper conductors encased in a polyester braid sheath. This design makes them virtually immune to Radio Frequency Interference (RFI), ensuring a silent background that lets every note shine. Whether you’re listening to intricate classical compositions or powerful rock anthems, the Isolda delivers sound so natural, it feels like the artist is in the room.

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Pure, Uncolored Sound

 

The Isolda DCT’s impedance-matched design (8 ohms) eliminates signal reflections, delivering music exactly as recorded. The Ear praises it as “one of the best speaker cables money can buy” for its neutral, fatigue-free sound.
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Seismic Bass Power

Closely spaced EDCT copper ribbons produce deep, articulate bass with unrivaled solidity. townshendcable.com highlights “bass with a power that is truly seismic,” making every low note punchy and precise.
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Stunning 3D Imaging

he cable’s low-inductance geometry creates a holographic soundstage, placing instruments with pinpoint accuracy. 6 Moons notes it “can convey a huge and realistic soundstage,” immersing you in the music.

 

 

 
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Silent Backgrounds

 

Virtually immune to RFI due to its flat, closely spaced conductors, the Isolda DCT ensures pitch-black backgrounds.
 
With genuinely silent backgrounds,” letting subtle details shine.“
 
 
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Perfect Impedance Matching

With an 8-ohm impedance matching typical speakers, the Isolda DCT prevents distortion from mismatched cables. townshendcable.com explains this preserves square waves, ensuring “no ringing or distortion.”
 
 
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Unequal Lengths, Same Sound

Unlike other cables, Isolda DCT Speaker Cables perform flawlessly even in unequal lengths. Thanks to their advanced impedance-matching technology, the sound from each speaker remains identical, regardless of cable length. This flexibility makes them ideal for any audio setup, from compact home systems to sprawling high-end rigs.

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Explosive, Precise Dynamics

 

EDCT-treated conductors deliver lightning-fast transients and vast dynamics for thrilling playback. Every note snaps with energy from whispers to orchestral peaks, as HiFi Pig praises its “bass clarity and space,” emphasising high-current handling, ideal for dynamic genres like rock or classical. The Isolda DCT brings music to life with unmatched precision and power.
 
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Natural, Fatigue-Free Sound

We’ve engineered the Isolda DCT for a relaxed, natural sound, free from harshness or edge. Impedance matching and RFI immunity ensure effortless music flow, perfect for vocals or acoustics, and one astute audiophile’s tale of his relief from “Alice-in-Wonderland” cable woes. Enjoy hours of fatigue-free listening with emotional depth and clarity.
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Unleash Your Music’s True Potential

 The Townshend Isolda DCT Speaker Cable is your key to audiophile bliss.

 Transform your hi-fi into a sonic masterpiece. Don’t just listen—experience music with seismic power, stunning clarity, and soul-stirring emotion today.

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