Okay, I need to create a concise and detailed summary of the Nordost QKore and QKore Wire system grounding accessories. Let me start by reading through the provided text carefully.
First, the user is a longtime Nordost user who was impressed by the QKore products released at High End 2017. The main points are that QKores are passive grounding devices made of a proprietary alloy, which is more reliable than organic materials in soil that vary with temperature and humidity. The user mentions that the exact contents and other companies involved are kept secret, which might make some people skeptical.
Then there's a part where Marko explains the concept of grounding, comparing it to a watering can and imagining people in white coats trying to ground them. The QKore devices have different models: QKore1, QKore3, QKore6. Each has specific dimensions and weights. The QKore6 is the most cost-effective as it can handle a power product and five components. The user had to order the QKore1, QKore3, and QKore6, but didn't get the USB-A wire, which was a problem.
The specifications mention the QKore Wire uses 16 AWG, solid-core, OFC, silver-plated, with FEP insulation. The terminations include banana, spade, RCA, XLR, BNC, RJ45, USB. The QKore1 has a banana-to-banana wire and a gold-plated binding post. The QKore3 has an RCA-to-banana wire and three multi-use binding posts. The QKore6 combines both and has additional posts.
The technology involves Nordost's Mono-Filament, which is a silver-plated copper conductor with FEP insulation. The wire is solid to better conduct resonance. The explanation about resonance is similar to a wind chime: when wires are separated, they don't resonate, but when connected, they do. The QKores address both AC and DC ground noise. The QKore1 handles pre-transformer AC noise, while QKore3 deals with post-transformer DC noise in audio components.
The user had to use the QKore6 for three components and a power product, but found that the setup was equivalent to using separate QKore1 and QKore3. However, they couldn't compare single-ended vs balanced connectors because their components only had BNC and RCA. The setup was manageable with the QKores on diffusers designed by Resolution Acoustics.
I need to make sure the summary includes all these key points: the purpose of QKores, their models and specs, the technology (Mono-Filament, FEP insulation), the difference between AC and DC grounding, the setup details, and the pricing. Also, mention the user's experience and the challenges faced, like the missing USB wire. Avoid any markdown and keep it in English. Let me structure this logically, starting with the overview of the products, their features, technology, how they address ground noise, setup instructions, and the user's experience. Make sure it's concise but covers all the important aspects without getting too detailed. Check for any technical terms that need to be explained briefly. Also, note the manufacturer details and where to find them. Alright, that should cover the main points.
Nordost’s QKore and QKore Wire are passive grounding accessories designed to address electrical noise in high-end audio systems. The QKores use a proprietary alloy, avoiding variability in organic soil materials affected by temperature and humidity. They include a “low voltage attractor plate” (LVAP) and are connected via Nordost’s patented QKore Wire, which features 16 AWG solid-core, oxygen-free copper (OFC) with silver plating and fluorinated ethylene propylene (FEP) insulation. The wire’s terminations include banana, spade, RCA, XLR, BNC, RJ45, and USB-A/USB-B options, with pricing starting at $359.99 for 2m lengths.
The QKore1, QKore3, and QKore6 models cater to different system needs: QKore1 grounds the primary power unit, QKore3 handles audio circuits on the secondary side, and QKore6 combines both, supporting a power product and five components. The QKore6’s design allows for efficient noise reduction when used with separate binding posts for each component, though Nordost recommends using individual QKore1 and QKore3 for optimal performance.
The QKores’ LVAP technology aims to stabilize ground potential by minimizing resonance through precise, mechanically tuned connections. Nordost’s Mono-Filament copper conductor, insulated with FEP (Teflon), reduces physical vibration and resonance compared to traditional methods. The system’s grounding addresses two noise types: pre-transformer AC noise (handled by QKore1) and post-transformer DC noise (managed by QKore3 via open jacks like RCA or BNC).
In practice, the user tested the QKore6 with three components and a power unit, finding it equivalent to using separate QKore1 and QKore3. Challenges included limited rack space and the absence of a USB-A wire for their MacBook Pro. The devices are compact (10.6” x 3.2” x 7.9” for all models) and weigh 6–7.8kg. Nordost emphasizes that grounding rods’ effectiveness varies seasonally, and QKores offer a more consistent solution. The products are marketed by Nordost, with details available at www.nordost.com.
