Detail 01
Totally passive
No power supply, no adapter, nothing to fail and nothing adding its own noise. It also means level only goes down.
Product detailSKU #1273887987190
ArtT8 8-Channel Transformer Isolator
1/8
Independent shopping perspective
The Korena take
Eight channels of passive transformer isolation in one rack space. For racks and PA systems where connecting two grounded devices produces hum.
Strong match
Who this is for
- Racks that buzz once two powered devices share a signal path
- Feeding a house PA from a laptop or DJ rig
- Studios tying together gear on different grounds
Consider the trade-offs
When to look elsewhere
- Anyone needing gain — it's passive and only loses level
- Hum from dimmers, lighting or bad cables
- One-off single-channel jobs; eight channels is more than needed
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Insertion loss 0.4dB at 100k, 5.5dB at 600 ohms
Almost nothing into modern gear. Into a 600-ohm vintage input you drop over 5dB and make it up elsewhere.
Detail 03
60dB CMRR
How hard it rejects noise shared across both wires. Enough to handle the ground-loop buzz it's built for.
Detail 04
XLR, 1/4-inch TRS and RCA on every channel, both sides
Ties consumer RCA gear to balanced pro inputs with no adapters, converting unbalanced to balanced while it isolates.
Detail 05
10Hz–50kHz, +/-0.5dB
Flat well past what you can hear, so it isn't thinning the bass or dulling highs on the way through.
Detail 06
1U, 19 inches, 3.75 pounds
One rack space, light enough to mount anywhere in the rack without rear support rails.
Final check
Know before you order
- 01Cables not included; eight channels means eight pairs of runs
- 02Fixes ground-loop hum, not noisy preamps or dimmer buzz
- 03Expect a small level drop and add gain downstream
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will this fix my ground loop hum?
If the hum comes from two grounded devices sharing a signal path, yes — the transformers break that path. Buzz from dimmers, bad cables or noisy preamps will remain.
02Does it need power?
No. It's fully passive: no adapter, no power switch, and no circuitry that can add noise of its own.
03Can I connect RCA gear to a balanced mixer?
Yes. Every channel carries XLR, 1/4-inch TRS and RCA on input and output, so it converts unbalanced to balanced as it isolates.
04How much signal do I lose?
0.4dB into a normal 100k input, which you won't hear. Into a 600-ohm load it's 5.5dB, enough to need makeup gain.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
13 detailsOther
- Category Source
- detail
- Insertion Loss
- 0.4dB @ 100kOhm Load, 5.5dB @ 600 ohm Load
- Dimensions
- 1.75"H x 19"W x 3.75"D (44.5mm x 482.6mm x 95mm)
- Output Connection
- XLR male balanced, o" TRS balanced, and RCA type phono jacks
- Korena Special
- false
- Weight
- 3.75 lbs. (1.7kg)
- THD
- 0.01% Typical @ 1kHz, +18dBu, Channel Separation 90dB typical
- Power Requirements
- Totally Passive
- Tier
- new
- CMRR
- 60dB typical
- Source Id
- site51273887987190
- Frequency Response
- 10Hz”50kHz, +/-0.5dB @ +4dBu
- Input Connections
- XLR female balanced, o" TRS balanced, and RCA type phono jacks
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