RF BLOCKER
A wide-band radio frequency filter that increases audio fidelity.
The connected-fidelity™ “RF Blocker” is a simple to fit radio frequency (RF) filter array. It is supplied in pairs and there are three connection options – banana and spade terminals, or bare wires. They simply fit across the loudspeaker + and - input terminals (or amplifier loudspeaker outputs).
RF Noise
RF ‘noise’ (WiFi and all other radio signals) is picked up by all cables, electronics and loudspeaker coils unless perfectly screened against RF. RF does ‘interfere’ with the audio signal so filtering out RF noise is an effective way of improving audio fidelity.
The RF Blocker is entirely passive, has no effect on impedance or any other amplifier/speaker characteristics other than eliminating a broad spectrum of radio frequencies, both going into the loudspeaker from the amplifier and RF re-entering the amplifier's circuit via the loudspeaker cable.
The resulting increase in audible fidelity is usually clear to hear as an increase in musical coherence, the high frequencies are clearer, mids cleaner, the bass tighter and less ‘boxy’, the sound stage improved. The overall effect is of less 'confused' musical details, getting you closer to the musical event.
As amplifiers and speakers are designed and built differently, the effect is slightly different in each amplifier / loudspeaker / loudspeaker cable combination, but there is almost always an audible improvement.
Suitable for use with all types of amplifiers (Class A, A/B, and D) and all types of loudspeakers and cables. They are not compatible with active loudspeakers.
The connected-fidelity™ RF Blocker is based on sound electronics principles. There is no 'Angel Dust' used in this product!
The RF Blocker is designed to audiophile standards
High quality electrical components are housed in a die-cast aluminium box acting as a Faraday cage ensuring no further RF interference is picked up to enter the audio chain. The short attaching cables are multi-strand OFC copper, connectors are gold plated.
Your audio system
The RF Blocker’s will work to a lesser or greater degree with all audio systems and the benefits will carry through to any further upgrades of amplifier or speakers or cables you may make in the future.
If you are bi-wiring, you can use two pairs of RF Blockers to maximize the benefits but one pair will also make an improvement. Experiment fitted to the bass terminals, then on the mid/treble and decide which option sounds best to your ears. We normally find it’s the critical 1,000-20.000Hz range (mid to high frequency range) that makes the most audible difference, but it is worth experimenting. It is possible to fit at the amplifier end of course.
Fitting instructions
Fit and forget – then enjoy the music.
RF Blocker Specifications
Wide band radio interference filtering for clearer audio
Designed and made to audiophile standards
Die-cast metal body
Choice of three connection options
IMPORTANT NOTE
This is not a mains or electrical power product. DO NOT CONNECT TO MAINS POWER.
Enjoy
Better resolved micro-details
Clearer musical sound staging
Deeper darker silence
User Feedback
“Michael this is pretty astonishing. Connected to my valve amplifier I always heard what almost sounded like a 'quiet pulsing H.F. hum' through my speakers when nothing was playing. They're now absolutely DEAD QUIET. RF blockers are a win! I'm really taken aback. I wouldn't say I was sceptical because I trust your skills and knowledge, but I did wonder if I personally would hear anything. There is a definite uplift across the board sonically. Everything is just sparkling and gorgeous.”
Greg, VAL Hi-Fi, Jan 2022
