Negative loudspeaker terminal grounding is what we consider to be one of the most important first steps in Entreq system grounding. The Macro Twin Kit is designed to make it as straightforward as possible. The kit includes two Macro Box ground units and two 1.1m Eartha ground cablesproviding everything needed to ground both channels of your amplifier’s negative speaker terminals. No additional purchases required, no guesswork. Simply connect, settle down, and listen.

There are many ways Entreq grounding products can improve an audio system, but grounding the negative speaker terminals at your amplifier is considered an essential first step. It addresses noise at the point where it has the most influence over everything you hear, and the results are not subtle. The Macro Twin Kit exists to make this fundamental step accessible. A complete, ready-to-use solution that brings Entreq’s core philosophy into any system.

Each Macro Box is a hand-finished oak enclosure, sealed with beeswax, containing Entreq’s proprietary mineral mix. The cables are terminated with a spade connector at one end and a 4mm banana plug at the other, and are non-directional, making connection to your amplifier’s speaker terminals simple regardless of your termination preference.

The effect of grounding the negative terminals is immediate and unmistakable. The noise floor drops, revealing detail and texture that was always in the recording but previously masked. The soundstage opens. Not artificially widened, but freed from the compression that electromagnetic and radio frequency interference impose on the signal path. Vocals gain presence and nuance. Transients decay more naturally. And perhaps most notably, bass takes on a solidity and authority that makes the entire system feel more grounded – in every sense.

These are not small, marginal gains. Reviewers and owners consistently describe the improvement as comparable to upgrading a power supply or adding a high-quality clock to a digital source. The difference is that the Macro Twin Kit achieves this across the entire system, from a single point of connection.

The Macro Twin Kit is deliberately positioned as an entry point into Entreq grounding. It demonstrates what becomes possible when the magnetic fields around your signal ground are properly managed and it does so at a level of performance that often surprises those expecting diminishing returns at this price point. Many listeners find that once the negative terminals are grounded, the improvements elsewhere in the system become more apparent, naturally guiding the next steps in their Entreq journey.

As with all Entreq products, system matching matters. Your local dealer can advise on the ideal configuration for your setup, and Entreq actively encourages auditioning before committing, because the right combination always sounds better than the most expensive one.

Connect one Eartha ground cable from the negative speaker terminal on each channel of your amplifier to its own Macro Box. Each box grounds one channel independently — never connect both channels to the same ground box. The cables are non-directional, so either end can connect to the amplifier or the box. Once connected, allow the system a few hours to settle before critical listening. For full connection guidance, including alternative configurations, see our Connection Guides