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Hall Research GLI-RCA Stereo Audio Ground-Loop Isolator/Filter w RCA Connectors

Stereo Audio Ground-Loop Isolator & Filter with RCA connectors. Eliminates ground loop noise between any audio source such as a notebook PC and audio equipment.
In stock (50 items available)
  • Brand
    Hall Research
  • SKU
  • Weight
    1.00 lbs
  • Warranty
    2 Years
  • Condition
  • Status
Product availability status
Hall Research

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  • $21.85
Market price: $23.00, you save $1.15
  • 5% less
  • Shipping info
    We offer free ground shipping on every purchase of $300 and more for US.
  • Payment Methods

  • Return Policy
    We Offer a 60-Day Money Back Guarantee
  • Weight
    1 lbs
  • SKU
  • Mnf#/Vendor#
    Hall Research

Stereo Audio Ground-Loop Isolator & Filter with RCA connectors. Eliminates ground loop noise between any audio source such as a notebook PC and audio equipment. Perfect frequency response of  + .03 db from 20 to 20,000Hz. Uses proprietary audio transformers and filters for total elimination of any spurious buzz and hum in the audio.

Have you ever connected a PC or notebook to an audio amp or a TV and gotten all kinds of ugly noise- Most people would answer yes, and that's because the audio output from these devices are not balanced. Professional equipment have balanced audio which uses a + and a - signal for each L/R side and therefore does not rely on ground. Any noise in the ground between the source of the Audio signal and the amplifier is automatically ignored. On the other hand unbalanced signals, such as the one coming out of your notebook, have no reference other than building/AC ground. In fact you may have noticed that if you disconnect your notebook power supply and ran on batteries the noise has gone away. This is because, by doing so you inadvertently eliminated the ground loop. Line-level audio is a very tiny low-level signal, so any noise in AC ground, even as little as 0.004v, will be quite audible - yuck!

The unit is simply inserted in series with the audio and it literally eliminates the ground connection between the two sides, passes all the audio while filtering out any noise using high performance audio transformers.

Everyone with a notebook should have one of these in their bag (along with an EDID emulator ), so the next time you do a presentation, you will have the purest sound along with sharp and trouble free video image.


  • Eliminates ground loop noise between the audio source and TV, or audio amp
  • Near perfect response of .03 db from 20 to 20,000 Hz
  • Perfect for AV presentations is classrooms or conference rooms
  • Compact size


  • Dimensions: 1.65 " x 1.25" x 1"
  • Material: ABS Plastic
  • Compliance: CE, FCC, RoHS
  • Freq Response: 20 to 20,000Hz
Free Ground Shipping
We offer free ground shipping on every purchase of $300 and more for US and US territory. Please choose "Free Ground Shipping (UPS/USPS)" option at checkout.

UPS Ground
UPS provides up-to-date tracking information. Ground service takes anywhere from 2-7 working days for delivery depending on destinations.UPS Ground does not deliver on Saturdays, Sundays or Holidays.

USPS Priority Mail/USPS Express Mail For all shipments shipped via USPS, we offer 'DELIVERY CONFIRMATION' number with each package. Difference between tracking number provided by UPS vs USPS Delivery Confirmation number is: Delivery Confirmation status is updated when the delivery has been made or when the package has made it through major USPS stations.

Air Shipment
Air shipments, Overnight, 2nd day and 3 day select methods offer guaranteed delivery time for your shipment. If you are in hurry or in need for the items on schedule, select one of these methods. Up-to-date tracking information is provided with each Air Shipment. BZB Express has the right to choose between Air shipments to meet or reduce delivery time. For guaranteed delivery of multiple items with expedited shipping, please contact our customer service representative for personalized assistance to get your items delivered to you when you need them.

International Customers
We offer shipping via USPS/UPS for our international customers. You can find different shipping options during checkout.

Most items ordered from BZB Express will be shipped out from our California Warehouse. Will-Calls are only allowed with Appointment Only - Please call Customer Service to set one up between the hours of 9am to 6pm PST.


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Money orders: and personal checks or company checks (may take up to 10 days to clear).
Wire Transfer: ( Bank Transfer ) only for the amount over $500. Contact us for the bank details.
Phone Orders: To place a phone order please call 1.888.660.2962 or 1.916.246.6263 and one of our Customer Service Representatives will take your order (8:00am - 6.00pm PST).

Purchase order: Fax purchase orders to 1.916.246.6258

We Offer A 60-Day Money Back Guarantee: 
Our main goal is to ensure your complete satisfaction with our service and products. If, for any reason, you are not 100% satisfied with your purchase, you can return it within 60 days of the purchase date for a full refund. Our 60-day money back guarantee applies to all of the products we sell, except for: TVs and monitors 20" and larger, Special Order merchandise, or any item indicated as non-returnable. Shipping is not refundable. Prior to returning your purchase, a Return Merchandise Authorization (RMA) number will be provided to you.

Refunds on returned items will be issued in the same payment form as received from the customer at the time of purchase. Once we receive the product and it passes inspection, we will credit your account. Please allow 3 - 6 business days for a credit to appear on your account.

If the item was sent back to us for an exchange, please allow 3 - 5 business days for the replacement to be processed.

No Returns/Exchanges on the following:

TVs and monitors 20" and larger
Special Order merchandise
Any item indicated on the website as non-returnable

For more information see our official Return Policy