SKU: 42183628998

Hollyland Cascade 2/4 Wire Converter. Bi-directional Convertion

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Description

Hollyland Cascade 2/4 Wire Converter. Bi-directional ConvertionThe Hollyland 2 4 Wire Converter (Model: HL WC01) is a rugged, compact system utility designed to bridge legacy wired party line intercom hardware with modern 4 wire digital communications. In broad television, theatre, and industrial event grids, matching different audio standards can cause level drops or feedback loops. This bidirectional converter handles the cross translation automatically, maintaining pristine wideband audio quality in both

The Hollyland 2/4 Wire Converter (Model: HL-WC01) is a rugged, compact system utility designed to bridge legacy wired party-line intercom hardware with modern 4-wire digital communications.

In broad television, theatre, and industrial event grids, matching different audio standards can cause level drops or feedback loops. This bidirectional converter handles the cross-translation automatically, maintaining pristine wideband audio quality in both directions.

Understanding the Conversion

Wired intercom infrastructures generally fall into two categories. This converter acts as an active, real-time translator between them:

  • 2-Wire Systems (Party-Line): Used by brands like Clear-Com, RTS, or Altair. They transmit power and bidirectional (two-way) talk/listen audio down a single pair of wires within a standard 3-pin XLR line.

  • 4-Wire Systems (Matrix/Digital): Used by high-end digital matrix platforms, broadcast consoles, and wireless hubs (like the Hollyland Solidcom C1 / C1 Pro Hub or Syscom 1000T). These split incoming and outgoing audio lines onto entirely independent pairs of pins (one path exclusively for input, one exclusively for output).

Core Performance Features

  • Intelligent Auto-Nulling Circuitry: The biggest hurdle in 2-to-4 wire conversion is line echo caused by impedance mismatches. The converter features a dedicated, front-panel AUTO NULL button. With one click, the device generates an internal test tone, analyzes the connected line impedance, and drops echo levels out of the track automatically.

  • Power-Free Party-Line Drawing: The converter can extract its operational power directly from an active 12V to 36V DC 2-wire intercom line. You do not need to hunt for an external wall outlet on a busy production floor. (Note: If the 2-wire side doesn't provide power, it can also run off standard USB-C bus power).

  • Distance Wire-Length Compensation: Built with internal DIP switches on the chassis to account for high-frequency signal roll-off over long cable runs. Users can toggle distance compensation steps to optimize audio performance for cable lengths spanning up to 656 feet (200 meters).

  • Independent ±6 dB Gain Trimming: Features independent physical gain adjustment switches for both the 4-Wire Input and 4-Wire Output stages. This allows technical directors to balance varying audio volumes between different manufacturer systems.

  • 6-Segment Real-Time LED Level Meters: Dual LED level strips provide instant, scannable visual feedback for signal inputs and outputs, flashing green for optimal paths and shifting to red to warn of audio clipping.

Hardware Technical Specifications Matrix

Feature Component Hollyland 2/4 Wire Converter (HL-WC01) Specifications
Bidirectional Connectivity 2-Wire (3-pin XLR Male & Female) | 4-Wire (3-pin XLR Male & Female)
Audio Frequency Response 100 Hz to 5 kHz (Optimized for crystal-clear vocal range)
Total Harmonic Distortion Less than 1% at 1 kHz
Signal-to-Noise Ratio (SNR) >55 dB (at 0 dBu baseline input)
Maximum Audio Input Level 2-Wire: >6 dBu | 4-Wire: >18 dBu
Termination Resistor Grid Integrated Switchable 220Ω Internal Termination Resistor
Chassis Form Factor Space 1/4 RU Size (Up to 4 units can be mounted in a standard 1U rack tray)
Total Unit Weight Approx. 520 grams (18.3 oz)

The Auto-Nulling Status Indicator

When initializing a system, click the physical AUTO-NULL button on the front face. The integrated LED color ring provides real-time diagnostic feedback:

  • Cyan (Blue-Green): Idle state / calibration has not been performed yet.

  • Green: Calibration successful. Echo paths have been calculated and suppressed.

  • Red: Calibration failed. The device detected active crosstalk, a terminal short, or open open-ended cables. Check your XLR connectors and re-run.

Ecosystem Integration Best Practice: If you are hooking this up to cascade a Hollyland Solidcom C1 / C1 Pro Hub with an existing wired Clear-Com setup, wire the 4-wire ports of this converter to the 4W RJ45/XLR terminal on the Solidcom Hub, and the 2-wire side to your party-line. Turn off all microphones on the beltpacks before hitting AUTO-NULL, as background room ambient noise bleed can distort the accuracy of the acoustic echo measurement.

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SKU: 42183628998

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R. Albin
Carnegie, US
★★★★★ 5
Superb
Format: Hardcover
A superb selection of Williams' poetry in a handsome and durable small volume. The editor, Robert Pinsky, selected an appropriate spectrum of Williams' verse across his long career, including all his most famous poems. Reading and rereading these poems is always rewarding because of Williams' ability to capture arresting images, experiences, and states of mind. As with all anthologies, some choices may be arguable. I would like to see all of his great, late poem Asphodel included but Pinsky's choices make sense and reflect his sure knowledge of Williams' work. This book is a great addition to the worthy American Poets Project.
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Reviewed in the United States on February 5, 2014
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David Miller
Pawtucket, US
★★★★★ 5
Another excellent volume from the American Poets Project
Format: Hardcover
As stated in another one of my reviews, every single Library of America volume I've ever purchased (including volumes from the American Poets Project) have been of the highest quality, superbly executed and just plain beautiful. Already possessing several volumes of William Carlos Williams work, I purchased this compact, delightful volume as a gift for my oldest son (who shares my appreciation for both great literature generally, and poetry specifically). Upon its arrival (delayed, once again, by amazon's ridiculously slow delivery) I was more than pleased, and felt proud to be presenting my son with such a first rate representation of W.C.W.'s work.
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Reviewed in the United States on January 11, 2009
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Anthony
Fort Morgan, US
★★★★★ 4
they are still as good as they were when they were first written
Format: Kindle
I've been reading William Carlos Williams since the seventies. His poetry was ground breaking at the time of there release, and to me, they are still as good as they were when they were first written. His portrayals of every day people and pastoral scenes are still worth reading. His rhythms in his short poems are worth studying for any poet. I recommend reading his selected Poems.
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Reviewed in the United States on December 15, 2014
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Johnny
San Leandro, US
★★★★★ 5
Enjoyable
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William Carlos Williams is a wonderful poet who incorporates the mundane and interesting things happening around him in his poetry. One word will suffice: enjoyable.
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cmckenzie
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★★★★★ 3
So much depends...on hype
Format: Paperback
There's more to doc WCW than Little Red Wheelbarrow... But not much
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