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Showing posts with label audio streaming cables. Show all posts
Showing posts with label audio streaming cables. Show all posts

Sunday

AUDIOQUEST COLUMBIA



THOSE marketing audio cables and interconnects would have you believe there’s much more to a bit of connecting wire than inductance, capacitance and resistance.It’s all a bit confusing for the layman, and the further you delve into this topic, the more complex and, often, less enlightening it gets. So, snake oil or credible science? The answer is never quite so straightforward – which is why I like to keep it simple when it comes to wiring up my system – nothing too fancy.

Which was why I was wary of the one-metre single-ended pair of AudioQuest Columbia interconnects passed to me. What on earth were those cylindrical packs affixed to the input end of the wires, I wondered? It didn’t help that there was a tiny button on each of these things which, when pressed, activated a small green LED.

Then again, AudioQuest is a cable company of some repute and surely, there had to be an explanation?

The extra bits are what the company calls its patented dielectric-bias system (DBS). In theory, any insulation on the cable slows down the passage of the signal through the conductor inside.

DBS “creates a strong and stable electrostatic field which saturates and polarises the molecules of the insulation.”

This, in turn, supposedly minimises energy storage in the insulator and non-linear time delays. The results, claim AudioQuest, are a quieter cable with improved detail and dynamic contrasts. There are batteries in the pack, which should last for years – the LED indicates battery status.

The conductor is solid and extreme-purity copper, and the dielectric is an air tube, and it takes about two weeks of use for the sonic effects of the Teflon shield to be eliminated.

The Columbia is available with RCA or XLR connectors – the review unit was the former.

The interconnects were used between an upgrade Bluenote Stibbert CD player and Krell KAV-400xi integrated amp, driving Audio Physics Tempo speakers via Stereovox Firebird cables.

For comparison, I had a pair of JPS Labs Superconductor Q and DH Labs Air Matrix interconnects. The usual running in was conducted over a few weeks.

What’s very obvious about the Columbia was how clean and focused it sounded across the frequency spectrum. Initially, I found the treble a touch grainy and etched, but this smoothened out with use, and eventually, the Columbia settled down to sound spacious and well-paced, if a tad more relaxed than the JPS (which also had more grunt) and Air Matrix.

It was a bit lean towards the bass end of things, but tight and well-controlled, so if your system has too enthusiastic lows and sounds a bit too syrupy, the Columbia is a good bet to put things back on even keel.

These are remarkably well-behaved interconnects, never accentuating on any particular area but instead, allowing the music to flow freely, as any good pair of wires should, and very light of feet when it comes to dynamics.

If you have a mid-to-high-end system that requires a bit of fine-tuning, and you need interconnects that don’t get in the way, the AudioQuest Columbia warrants an audition.

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DH LABS SILVER SONIC / Q10 / POWER PLUS



THEY have been touted as high-end cables at budget prices, and after testing them, I can assure you reviewers are not wrong in their observations of DH Labs’ Silver Sonic wires. I tried three products – interconnects, internally bi-wired speaker cable and power cord – and all featured “family” traits of big soundstage, great detail and punchy sound, while leaning towards a neutral balance and a mild touch of brightness.

The Matrix


The Silver Sonic Air Matrix interconnect is unique in that it uses DH Labs’ proprietary Air Matrix dielectric – a mixture of PTFE Teflon and 60% air. The dielectric constant is 1.4 and its propagation velocity is 84%. Going by the charts, Air Matrix outperforms Teflon.

It appears it is this dielectric that gives these interconnects their speed and zap. The sound created is truly big, bold and powerful.

Using a Rega Apollo CD player, Audiolab 8000S and Epos 15.2 speakers, I compared this with a pair of home-made silver interconnects.

The Air Matrix, which uses silver-plated copper, sounded as detailed as silver and surprisingly more upfront and “faster”. It also had a much better and “rounded” bottom end. The bass notes sounded richer with more solidity.

Another reviewer tested these and they held their own against interconnects that cost three grand.

Q’s the word


Considering that the Q10 are internally bi-wire speaker cables, they are rather thin (about 8mm diameter) and quite flexible. This is most welcome, as many speaker cables can be as thick as snakes and stiff.

Unlike other bi-wired cables, these have wires of different gauges – they feature 14 AWG wires for the treble and 12 AWG wires for the bass/mid.

I compared them with AudioQuest GBC single bi-wire cables. This may not be a fair comparison because the GBCs are not exactly the best that AudioQuest can offer, but the GBC is a 12AWG aggregate size cable featuring six conductors using pretty good copper – AudioQuest’s Long Grain Copper.

Again, the DH Labs cables created a large soundstage with a good bass rendition. Details were aplenty and the images were stable. One comment must be made – the soundstage created by the Q10 and also the Air Matrix seems to be spherical whereas other cables such as the AudioQuest GBC tend to place the musicians in a row between or slightly behind the speakers with one more row at the back.

In terms of tonal balance, the Q10 was pretty neutral whilst the GBC displayed some upper-mid hardness.

Power factor


The thick (15mm diameter) Power Plus power cable uses three 12 AWG high-purity copper conductors to achieve very low series resistance and inductance, and features noise-cancelling geometries to cut RFI noise. It comes with a good quality US plug and IEC connector. Though it is quite thick, it is very flexible.

I compared this with a Kimber Power Kord and a Supra LoRad. The Kimber was bass heavy while the Supra and Silver Sonic Power Plus were close sonically, with the latter being a tad richer sounding.

The Power Plus was tonally on the neutral side and created a big soundstage, but it had the tendency to push the midrange and, especially, the vocalist forward while there was a slight hint of brightness on the high notes.

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