September 2004: We have introduced our new flagship BP-3.5 Signature PLUS. This model represents our latest assault on what superior noise-free AC delivery should be. Did we go all out? Yes - and then some. Never before has any power conditioning device brought you closer to signal truth than our BP-3.5 Signature PLUS. It will change everything you hear and feel [the emotion of the performance] in your favorite audio discs, be they vinyl or digital. You will finally hear what the artist and recording engineers really captured in those fleeting moments during the original performance. Perhaps for the first time ever you will hear just how good your present equipment really is, without the common veiling introduced by RFI/EMI pollution and a host of AC distortions. Reviewers Srajan Ebaen, Jules Coleman, John Potis, Ken Micallef and Stephaen Harrell all own and use our older Signature versions in their reference systems.

6moons.com's publisher and senior editor awarded the older Signature unit his Best We've Heard Yet Blue Moon Award in the AC line conditioner category [photo used by permission].

This unit represents a breakthrough in power line conditioning technology. It is the first of its kinds to use the patented Plitron NBT* transformer in a balanced, LoNo* configuration. This Narrow Bandwidth Technology combined with our Low Noise technology provides ultra-clean, ultra low-noise power for your high-end audio and video equipment. The LoNo technology assures whisper-quiet performance, superior low in-rush current and rock-solid AC line voltage. The NBT technology provides both common and random noise filtering starting at 1000 Hz on your AC line.

You will be rewarded with the purest, sweetest midrange and treble and the most solid, subterranean bass ever. You will no longer merely discuss instrument placement, but which way the player's head is turned, the actual distance, in feet, of how far away the performers are situated, how much spittle is in the mouth piece and whether or not the artist has a smile on his face. The silence between, around and behind the notes is as evident as never before. Singling out individual voices in a mass chorus becomes child's play, as in Mapleshade's stupendous Walk With Me by the Harlem Arc Choir.

Realizing the size of the recording venue and placement of the microphones becomes as transparent as looking at a piece of art in your living room - you know how big it is, how high up on the wall, how far away from you, in how large a space, and surrounded by what. Uniquely, our BP-3.5 Signature will show low-level details in the bass/midbass band that were previously smeared and hidden by AC noise, making stand-up bass on Jazz recordings extremely palpable and realistic.

The BP-3.5 Signature PLUS retain the same design philosophy and quality as our other BP Ultra units but add these special features:

BP-3.5 Signature PLUS features:
Faceplate: 1/4" machined aluminum with clear silver or black coating
Hardware: brass/bronze 
Transformer: 2400VA NBT* [Narrow Bandwidth Technology] with LoNo* [Low Noise] and additional magnetic shielding around the transformer
Outlets: Oyaide R-1, the very finest 20A duplex receptacle available
Wiring: your choice of 12 AWG stranded Oxygen Free Copper wire, 12 AWG stranded Oxygen Free Copper Litz wire, 10 AWG solid 4N 99.99% pure silver wire or 6N 99.9999% pure UP-OCC single crystal copper wire.
GFCI Outlet: The best in the industry, Hubbell industrial grade
EP-2000: Environmental Potentials state of the art surge suppression and line filtering
ERS Cloth: Heavy use of ERS cloth on chassis interior and on transformer. This unique product diffuses RFI/EMI and reduces its negative effects.
L-10 power cord: 6 foot 10-gauge Oxygen Free Copper Litz wire cord with Oyaide IEC and AC plug.                         Iso-Cones: set of 4 of our custom stainless steel isolation cones and protector discs.                                               Individual filtering on each duplex outlet that includes our advanced spread-spectrum, low impedance design.

    
Options: Bybee Quantum Purifiers [$200]

The graph from the Plitron archives shows the 70dB noise reduction of their exclusive NBT* technology [black graph]. Paraphrased from the BP-3.5 Signature review, "NBT* reduces line distortion within isolation or power transformers by restricting electromagnetic energy to a very narrow frequency pass band. This effectively attenuates higher harmonic and spike distortions which fall outside the narrow range of the transformer's low-pass filter. NBT* is based on an increase of internal series inductance, reduction in primary to secondary capacitance and phase cancellation, the latter obtained by connecting a bifilar control winding in contraposition through a capacitor.

At low frequencies, the capacitor acts as an open switch to allow the 50/60Hz power frequency to freely cross the transformer. At high frequencies, the capacitor behaves as a closed switch, with the magnetic flux of the two windings canceling each other for full deletion of high frequency signals. Series inductance and capacitor values fix the corner frequency of the transformer's passing bandwidth.

Harmonic artifacts of 50/ 60Hz sine wave distortion are common up to 10kHz, above which switching transients from rectifiers and motor drives enter the picture. At frequencies above 50kHz, strong HF signals from radio, TV and computers are superimposed on the line to appear across the primary winding of a transformer. At frequencies above 1MHz, noise is mostly common mode which refers to both hot and neutral containing an equal amount of amplitude and phase distortion. For frequencies below 1MHz, the major component of the noise is typically differential mode where the noise on both legs' amplitudes is equal but their phase is reversed. Differential mode noise generates a real noise voltage difference between line and neutral. NBT* resolves both differential and common mode noise most effectively."

* "LoNo and NBT are trademarks of Plitron Manufacturing Inc."