What the REL Bassline Blue Line Array Connector Actually Does
Let us start with the most important point, because it saves confusion later. The REL Bassline Blue Line Array Connector is a cable, sold as a matched pair. It makes no sound on its own. Its single job is to link two REL subwoofers together in a stacked vertical line array so they behave as one larger, more capable sub-bass system. Think of it as the connective tissue that lets a second REL join the first without you running a separate high level cable back to the amplifier for each one.
When you build a REL line array, one subwoofer is fed the REL high level signal derived from your power amplifier's speaker terminals. The Line Array Connector then carries that same signal up to the second stacked REL, keeping both units working from the identical amplified reference. That shared signal path is why a properly built REL array sounds cohesive rather than like two separate subs fighting each other.
Why REL's High Level Philosophy Matters Here
REL is a British specialist that builds sub-bass systems designed to integrate with your main speakers, not just add rumble. The heart of that approach is the High Level connection, a signal taken from your power amplifier's speaker terminals so the subwoofer receives the same amplified character and tonal signature as your speakers. This is what gives a REL its reputation for seamless musical integration.
The Bassline Blue conductor family is REL's higher performance high level cabling, and the Line Array Connector applies that same conductor design to the task of joining two subs. Because both subwoofers in the stack draw from one shared high level feed, they stay perfectly in step with each other and with your speakers. The result of a well set up array is greater output, deeper effortless extension, and a noticeably larger, more three dimensional soundstage.
Which RELs It Connects
The Line Array Connector is intended for REL subwoofers equipped with a high level input. In practice that covers a wide swath of the current lineup, and stacking works best when you use two of the same model so their drivers, cabinets, and amplifiers behave identically.
Musical two channel arrays
If your goal is scale and refinement for music, matched pairs from the T/x and Classic families are natural candidates. Consider two REL T/5x, two REL T/7x, two REL T/9x, or the elevated REL T/9x SE. On the retro voiced Classic side, a stack of two REL Classic 98 or two REL Classic 99 brings that warm, music first character with the extra headroom a second cabinet provides.
Home theater arrays
For rooms that lean toward movies and slam, a pair of dedicated HT subwoofers such as two REL HT/1003 or two REL HT/1205 can be stacked for greater LFE authority. As always with any array, confirm the specific model's inputs and REL's stacking guidance before you build.
Where It Sits in the REL Cable Range
It helps to understand how the Line Array Connector relates to REL's other cables, since they serve different jobs.
- Line Array Connector (this product): joins two RELs in a stacked high level array. It is not the cable that connects your first sub to the amplifier; it is the link between subs.
- Bassline Blue High Level cable: the upgraded high level run from your amplifier's speaker terminals to a single REL, sharing the same Bassline Blue conductor family.
- REL Commander and REL Commodore: dedicated LFE cables for the .1 home theater connection when you are running a sub off a processor's subwoofer output.
In a typical two sub high level array you would feed the first REL with a high level cable and then use the Bassline Blue Line Array Connector between the two subs. If you are building a matched Bassline Blue signal path from source to stack, this is the connector that keeps that conductor family consistent all the way up.
Ideal System and Use Case
Reach for the Line Array Connector when a single subwoofer has done its job beautifully but you want more. More output for a larger room, deeper reach with less effort, and a wider, taller soundstage that fills the space. Two smaller RELs stacked often integrate more gracefully than one very large sub trying to pressurize a big room alone, and a vertical array can also help with room loading and even bass distribution.
Because both subs run from the same high level reference, a stacked musical array preserves the timing and tonal match that makes REL integration so convincing. You get scale without smearing the music.
Pairing Thoughts
Keep your array logical and matched. Pair the Line Array Connector with two identical subwoofers, and match your source cabling to the same intent. A Bassline Blue high level feed into a Bassline Blue Line Array is a tidy, consistent chain for a music focused stack, while an HT array built around matched HT subwoofers keeps the theater side purposeful. Whichever direction you go, the connector's role stays the same: two RELs, one shared signal, one unified sub-bass system.
Confirm the Match Before You Buy
This is a compatibility part, so the single most valuable step is verifying that your specific REL subwoofers are equipped with the high level input and are suited to a stacked line array. Model, generation, and input configuration all matter, and using two of the same model gives you the cleanest result.
Frequently Asked Questions
What does the REL Bassline Blue Line Array Connector do?
The REL Bassline Blue Line Array Connector is a cable, sold as a matched pair. It makes no sound on its own. Its single job is to link two REL subwoofers together in a stacked vertical line array so they behave as one larger, more capable sub-bass system. When you build a REL line array, one subwoofer is fed the REL high level signal derived from your power amplifier's speaker terminals. The Line Array Connector then carries that same signal up to the second stacked REL, keeping both units working from the identical amplified reference. That shared signal path is why a properly built REL array sounds cohesive rather than like two separate subs fighting each other.
Where does the REL Bassline Blue Line Array Connector sit in the range?
It helps to understand how the Line Array Connector relates to REL's other cables, since they serve different jobs.
Who is the REL Bassline Blue Line Array Connector best suited to?
Reach for the Line Array Connector when a single subwoofer has done its job beautifully but you want more. More output for a larger room, deeper reach with less effort, and a wider, taller soundstage that fills the space. Two smaller RELs stacked often integrate more gracefully than one very large sub trying to pressurize a big room alone, and a vertical array can also help with room loading and even bass distribution.
What should I pair with the REL Bassline Blue Line Array Connector?
Keep your array logical and matched. Pair the Line Array Connector with two identical subwoofers, and match your source cabling to the same intent. A Bassline Blue high level feed into a Bassline Blue Line Array is a tidy, consistent chain for a music focused stack, while an HT array built around matched HT subwoofers keeps the theater side purposeful.
How do I confirm the REL Bassline Blue Line Array Connector is the right match?
This is a compatibility part, so the single most valuable step is verifying that your specific REL subwoofers are equipped with the high level input and are suited to a stacked line array. Model, generation, and input configuration all matter, and using two of the same model gives you the cleanest result.
Come Listen in Timonium
All Elite Audio is an authorized REL Acoustics dealer with a showroom in Timonium, Maryland. Demo units rotate and not every model or array is always set up, so reach out before you visit if there is a particular pairing you want to hear. We are happy to help you confirm compatibility, plan a line array, and match the right REL subwoofers and cabling to your speakers and room. Contact us to arrange a listen or to build your stack the right way.