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Item #:
2899090
ISOBLOX Transformer Isolation 1:1 BLOX Device
87% of respondents would recommend this to a friend
Item #:
2899090
BSD 68
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ISOBLOX offers 600 ohm, 1 to 1 inline isolation, retaining load and source impedance, while providing signal and ground isolation.
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What Stands Out
Transformer Isolation
The ISOBLOX provides superior transformer isolation, effectively eliminating ground loops and unwanted noise, ensuring clean audio signals and optimal performance in professional audio setups.
Compact Design
Designed for portability, the BLOX device is compact and lightweight, making it easy to transport for live performances without compromising on quality or functionality.
1:1 Ratio
The 1:1 transformer ratio guarantees accurate signal transmission with minimal distortion, delivering high fidelity audio that meets the demands of sound engineers and musicians alike.
Product Details
- Provides 600 ohm, 1:1 inline isolation
- Enables signal and ground isolation
- Maintains 600 ohm load and source impedance
- Features XLR female input and XLR male output
- Constructed with black powdercoated aluminum chassis
- Equipped with hand-soldered connectors
| Item Weight | 4 ounces (113.4 grams) |
| Product Dimensions (L x W x H) | 1 x 3.5 x 1.25 inches (2.5 x 8.9 x 3.2 cm) |
| Item model number | ISOBLOX |
| Date First Available | July 16, 2004 |
| Material Type | Stainless Steel |
Who Should Buy?
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Audio Professionals
Ideal for sound engineers needing to eliminate ground loops and ensure clean audio signal transmission during recordings.
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Live Event Setup
Perfect for live sound setups where isolation of audio sources is crucial for professional-quality performance and clarity.
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Home Studio Users
Beneficial for amateur musicians in home studios to improve sound quality by reducing interference and hum in recordings.
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Casual Listeners
Not suitable for casual users who primarily listen to music without concern for signal quality or interference problems.
Product Description
ISOBLOX Transformer Isolation 1:1 BLOX Device
About This Item
Introducing the Rapco Horizon ISOBLOX Transformer Isolation 1:1 BLOX Device Experience superior audio quality with the Rapco Horizon ISOBLOX Transformer Isolation 1:1 BLOX Device. This innovative device offers 600-ohm, 1 to 1 inline isolation, allowing for both signal and ground isolation. Designed with convenience in mind, the ISOBLOX retains a 600-ohm load and source impedance, ensuring a seamless audio experience.
The XLR female input and XLR male output make it easy to connect to your audio equipment, providing a stable and reliable connection. Built to last, the ISOBLOX features a black powder-coated aluminum chassis and hand-soldered connectors, guaranteeing durability and longevity. Its compact size makes it convenient for on-the-go use, perfect for audio professionals and musicians alike. Not only does the Rapco Horizon ISOBLOX deliver impeccable audio performance, but it also offers great compatibility. Pair it with your favorite audio devices and experience enhanced sound quality in any setting. Whether you're a sound engineer, musician, or audiophile, the Rapco Horizon ISOBLOX Transformer Isolation 1:1 BLOX Device is a must-have for your audio toolkit.
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Customer Questions & Answers
-
Question:
What are the input and output connectors for ISOBLOX?
Answer: XLR female input and XLR male output. -
Question:
What load and source impedance does ISOBLOX retain?
Answer: ISOBLOX retains a 600 ohm load and source impedance. -
Question:
What is the chassis material of ISOBLOX?
Answer: The chassis is made of black powdercoated aluminum.
Rapco Horizon Direct Boxes ISOBLOX Editorial Review
The Rapco Horizon ISOBLOX Transformer Isolation 1:1 BLOX Device is a high-quality device that eliminates ground loop problems. It contains a transformer that does not alter the sound. The device can be used as a volume control for band floor monitor speakers or for controlling microphone volume. It can also be used for balancing audio from a cable TV box to an XLR mic plug in the wall for a PA system. However, there are some issues with the device. Some customers reported a hum in the signal when the device is turned down, making it unusable. Pressing the button causes a loud "POP" in the signal, which is not desirable. Some customers also reported that the device did not work properly or had a shortage in it. Overall, the device is effective in eliminating ground loop problems and providing volume control, but potential users should be aware of the possible issues.
Customer Reviews & Ratings
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Pros
- High-quality device that eliminates ground loop problems
- Contains a transformer that does not alter the sound
- Can be used as a volume control for band floor monitor speakers or for controlling microphone volume
- Can be used for balancing audio from a cable TV box to an XLR mic plug in the wall for a PA system
Cons
- Some customers reported a hum in the signal when the device is turned down, making it unusable
Platform Trust & Buyer Confidence
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Jazz
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“Easy to use and always helpful and sorts any issues I've had past and present”
1 September 2026 · via Trustpilot
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Features & Benefits
- 600 ohm, 1 to 1 inline isolation
- Retains 600 ohm load and source impedance
- Provides signal and ground isolation
- XLR female input and XLR male output
- Black powdercoated aluminum chassis
- Hand soldered connectors
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