Make that tried.
I have 3 QB4 Mk II’s - one for each circuit feeding my system. I use them in conjunction with power conditioners - not as power conditioners. Yet, I only use the ’Primary Earth’ outlet in each unit. None of the others. It provides a nice transparency to the SQ via their proprietary solid core wiring.
I took one apart. It’s well built - pretty simple inside. Star grounding - with a resistor on each outlet - except to the Primary Earth. The resistors slightly lift the ground - which ’softens’ or ’warms’ the SQ a tad bit. This could be a good thing to tame some HF harshness - if that's needed.
In order to convert the QBase to a power conditioner, the QRT plug-in enhancers would be needed. I didn’t go in that direction. Fortunately, the QB4’s play very nicely with my Transparent Audio conditioners. YMMV
I delayed it and regret not having it done earlier. It’s a really nice improvement. I no longer use a power conditioner. Good power cords and upgraded outlets on a dedicated circuit take care of clean power delivery. I highly recommend it. But it’s up to you. With the power conditioner you need the best power cord feeding it, or at least one that’s equal your best power cord. Cheap power conditioner is the cure that’s potentially worse than the disease.
OK I have a mk3 incoming and will test directly against the mk2.
Apparent changes are; the internal PCB's are redesigned, with the ground plane now on its own dedicated PCB with more of a focus on ground sink tech.
One thing I will mention, according to Roy Gregory, who has reviewed many Nordost QRT products (for decades literally) in the UK, the QB8 performs better than the QB4.
You think they would be identical except for outlet number, but that’s what the Brit’s claim. Something to keep in mind if you can stump up the extra cash.
Incorrect. Here’s a link to photos showing the innards of a Nordost QB4 MkII.
The wiring is solid core - aka monofilament. It looks like 14 awg (possibly 12awg). As you can see, they are not copper. The only wire that is stranded is the ground that goes from the pcb board to the base plate. Even then, it looks like 14awg with relatively thick stands - perhaps 5 stands.
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It pretty much is. It transitions from being a power distributor to a power conditioner by adding the assorted Nordost Plug-ins. It does offer a grounding method - which all of the major cable manufacturers providing.
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Thanks for the laugh!
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As per my earlier post, I have 3 QB4’s. They do provide improvement to my system’s SQ - even w/o the enhancers.
@cleeds He worked for Nordost for 3 years 2009-2011, after which he went back to audio journalism. It’s (par for the course) dishonesty to misinform people here by saying he works for Nordost. Is it possible to work in the industry for a time (12 years ago!) AND be a reviewer?
@steakster How would you know if all you have tried is the QB4? Although I agree it doesn’t make sense.
I had a QB8 mk2 where the fuse holder chassis insert broke and the wiring to/from the positive terminal inlet to the fuse terminal was stranded copper. Definitely not solid core monofilament. There could be production differences though, and your pics show solid core. But is it monofilament?
Reporting back.... the mk3 bass is much better and more defined, and the soundstage has opened up. The differences between the mk2 and mk3 are subtle, but IMO worth the money. I now have the mk2 for sale.
I will also try out the new WAVE and SINE devices. I used to have the Qv2 and while it did improve things in some areas, I thought it ultimately took away some transparency and naturalness. I ended up liking my system better without it in. But that was a while ago and many things have since changed...