Performance Benefits and Why it Was Designed
Perhaps we start with why we created BassLine Blue in the first place. Frankly, we were fed up with what most of what the cable companies were doing. Still do, for the most part. Most grab any piece of wire they make, stick a Speakon connector on it and call it a REL cable. It’s thoughtless, lazy and smacks of terrible engineering. Band wagoning on REL’s success without even trying to understand what we’re doing. Worse, most are terrible value. And a few are downright dangerous.
On one occasion, we know of a poor customer’s main amplifier that was blown up shortly after correctly connecting a new cable. He successfully argued that his amplifier and REL had been working just fine together for 5 years running and that he had checked the connections several times to make sure he had connected them exactly as his original real REL cable and his amp went up in smoke within 30 seconds of connecting and turning everything back on.
Something clearly had to be done, you see we’re not one of those head-in-the-sand audio companies that doesn’t believe that cables make no difference. We’ve known for almost 40 years that for speaker cables, interconnects, HDMI and digital—not to mention a/c–we can hear the benefits when they get it right and the downside when it’s poorly executed. Like it or not, cables matter and the flat earth audio types can complain all they want but they’re simply in denial. But connecting to our impedance environment is unique and this is where conventional cable companies get it wrong.
Start with speaker cables, these are often where most cable companies go off the rails. Presumably, their thinking extends no further than “Hey, a REL’s a subwoofer. A sub is a kind of speaker. Ergo, we’ll throw a Speakon onto our Cro-Magnon speaker cable ( Not a real product name folks ). I believe the thinking runs something along the lines of “It’s gotta be better, after all, our cable is 20 times thicker than the wimpy little wires REL uses.”
And that might be vaguely useful if REL’s High Level Input didn’t use an input impedance well above 100,000 ohms. Let me say again s-l-o-w-l-y. 100,000+ ohms of input impedance. Which means the concept of big Cro-Magnon cables has exactly zero usefulness because the REL cable carries virtually zero current. And why do many speaker cables resort to larger gauge wire in part? Because thicker wire carries more current, which, in this case matters not at all. It’s like using a high-pressure firehose to rinse your mouth after brushing your teeth. You could do it, but that doesn’t make it a smart idea.
Your main amplifier, your typical 100 watt/ch. stereo amp, is designed to deliver a very low output impedance. This is because loudspeakers typically produce a fairly low impedance themselves and it’s critical for the amplifier’s output impedance to get way down low, almost to zero, in order for the speaker to have as little negative impact on sound as possible. But REL doesn’t build passive loudspeakers, we build amplified, powered subwoofers that simply sound their best when fed a signal that includes the whole audio system, including the main interconnecting cables ( see, there we go again, affirming that cables DO make a beneficial difference ) AND the power amplifier that is feeding your speakers. As such, we need a very high input impedance to knock the gain back down so that our big amplifiers, typically far more powerful than your main amp, can go about their business of making incredible sounding and incredibly deep bass. So, scratch the idea of big fat cables.
The next thing we run into that frankly scares the hell out of us, is networked cables that have multiple components like resistors, capacitors and coils used within a serious looking box, usually placed about 3’ ( 1 meter ) from the end of the cable. Again, these are speaker cable designs so there’s that issue ( read the paragraphs above as to why speaker cables themselves are a big problem when used as REL cables ), but these components are generally placed between hot and ground. Now, that’s actually a good idea for those low impedance speakers because the idea behind networked speaker cables is that they can lower something called the complex impedance of a cable. Stay with me, none of this stuff is as complicated as many want you to believe.
Bottom line? Any speaker cable that doesn’t run a network or doesn’t have some seriously carefully-made insulation becomes much higher impedance as you get down into the bass frequencies. What scares us about networked speaker cables when used as REL cables is that absolutely no one has studied the effects of these networks ( designed to be used between a power amp and a low impedance speaker ) when connecting the same power amp to a super high input impedance. We have seen over the years a couple instances of a networked cable resulting in damage. Let’s call the networked REL cable approach two bad ideas rolled into one package.
So what does work? Simple, narrow-gauge cable geometry, using very high-quality copper resulting in wide bandwidth that goes out to somewhere around Channel 7 in video. This is important because anything that doesn’t allow for effortless high frequency performance will beat its way back down into the bass regions and undo all our hard work in our subwoofers.
We hand assemble our cables using pure silver solder and simple spade connectors because they sound far and away better than anything else we listened to. More importantly, its geometry works for that very high input impedance we use in our High Level input. That’s it. No mumbo jumbo. Just basic, sound engineering techniques put into practice by the same team that designs the very filter boards employed in every REL over the past two decades or so. And then we priced it as fairly as we could afford to, so that more people could have access to it. Because, let’s be clear, we stand to benefit far more from a cable, properly designed at an affordable price that results in RELs sounding better, than can cable companies who must rely entirely on the sale of their cable.
The Ultimate Upgrade
Bassline Blue™ is a sensibly-dimensioned cable, well-constructed so that it will improve the overall sound of every aspect of the host system’s performance. As with any REL product—the improvement extends well beyond the obvious bass region. The greatest area of improvement lies in the manner in which the entire soundstage is illuminated. This is a quality quite different from brightness. Illumination acts to bring light into the stage and renders contrast and clarity as well as dynamic shadings much more evident.
Natural Drawn Copper
Beyond optimizing the geometry of the internal lay of the cable, we also employ copper that exceeds industry practices and is of a quality and type generally specified for military use and high speed telecommunications. Bassline Blue is constructed of slow-drawn, high purity copper, drawn in a nitrogen bath to minimize impurities on the surface of the wire. Each individual conductor is coated in a Teflon film immediately upon leaving the extrusion die to ensure that impurities cannot impinge on the cable while awaiting further processing. This technique produces a sound that is exceptionally pure and natural which we term Natural DrawnTM wire.
Bassline Blue is hand constructed at our California facility using cable produced exclusively to REL’s specification by a North American OEM wire and cable house. Construction is quite labor intensive and can require up to one hour per cable. We use pure silver solder for all connections which ensures not just high quality sound, but also as the cable ages and oxidation sets in sonic degradation should be nil due to the conductive properties of pure silver.
Connect Like Never Before
High level = High Performance
REL employ Swiss-made Neutrik SpeakOn connectors at the input to the REL sub bass system. In over 100,000 RELs in use the world over, this connector has proven itself reliable, neutral and a mechanically ideal connector for REL’s renowned High Level Input circuitry. BLUETM also features high quality spade lugs coated in gold to minimize oxidation. Should your amplifier require a bare wire connection, this is easily accommodated by manually re-terminating the individual red, black and yellow leads.
The standard high-level hookup procedure is: attach the red wire to the amplifier’s right positive speaker output terminal; attach the yellow wire to the amplifier’s left positive speaker output terminal; attach the black wire to whichever of the amplifier’s ground output terminals is convenient; plug the Speakon connector into the Sub-Bass system’s high-level input.
DH Labs Thunder Premium Subwoofer Cable
REL Acoustics Line Array Connectors
REL Acoustics 212 / SX Subwoofer, Piano Black
REL Acoustics S/812 Subwoofer
REL Acoustics S/510 Subwoofer
REL Acoustics T/x Series Subwoofer
REL Acoustics T/9i Subwoofer