Palmer PWUPPER Passive Line Isolation Box
SKU: 77304701751

Palmer PWUPPER Passive Line Isolation Box

Sale price$156.59 Regular price$173.99
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Description

Palmer PWUPPER Passive Line Isolation Boxhe more complex the setup, the higher the chance of ground loops. With the Palmer wupper Line Isolation Box, everything is quiet again so you can enjoy your audio without humming and buzzing. The Palmer wupper is an isolation transformer in a robust aluminium and steel housing. It separates the ground potentials of two devices so that equalising currents are prevented and only your sound is transmitted clean and without interference. The Palmer wupper

he more complex the setup, the higher the chance of ground loops. With the Palmer wupper Line Isolation Box, everything is quiet again so you can enjoy your audio without humming and buzzing.

The Palmer wupper is an isolation transformer in a robust aluminium and steel housing. It separates the ground potentials of two devices so that equalising currents are prevented and only your sound is transmitted - clean and without interference.

The Palmer wupper was developed for guitar and bass applications, but its brilliant, unaltered sound is just as suitable for keyboards and hi-fi equipment. The inputs and outputs with jack connections can be balanced or unbalanced. This means that the Palmer wupper can also be used to balance unbalanced signals, which allows longer cable runs without affecting the sound. Due to its passive design, the wupper requires neither batteries nor phantom power. This makes it extremely failure-proof.

The Palmer wupper is a simple, efficient humming killer: Connect it between two devices and the interference is gone. Sometimes it can be that simple!

Features

  • Line isolation for guitar/bass/keyboard; also suitable for HiFis and car stereos
  • Single channel: Jack input and -output
  • Reliably eliminates ground loop hum and interfering signals
  • Galvanic transformer isolation
  • Can be used to balance signals
  • Pure and unaltered sound
  • Passive operation: simple and failure-proof
  • Distortion-free up to +6 dBu
  • Solid casing made of aluminium and steel
  • Incl. rewritable tour label for attachment onto the back of the wupper

Specifications

General
Product type line isolator
Channels 1
Type passive
Transformer isolated Yes
Inputs 1
input type balanced/ unbalanced
Input connectors 6.3 mm jack
Outputs 1
Output type balanced/ unbalanced
Output connectors 6.3 mm jack
Ground lift switch no
Housing Aluminium continuous casting
Dimension (H/W/D) 110 x 50 x 50 mm
Weight 0,3 kg
Ambient temperature during operation -20 - 70 °C
Relative Humidity < 80 %, not condensing
Accessories (included) Inscription label (tour label), rubber feet
Audio
Max. input level (< 1% THD, 20 Hz) + 10 dBu
Max. input level (< 1% THD, 1 kHz) + 32 dBu
Frequency response (±0,2dB, relative 1kHz) 20 Hz - 20 kHz
Input impedance (1 kHz) 17 kOhm
Output impedance (1 kHz) 500 Ohm(s)
THD (30 Hz, +4 dBu, unity, unweighted) < 0,09 %
THD (1 kHz, +4 dBu, unity, unweighted) < 0,002 %
IMD (SMPTE) (60 Hz / 7 kHz, 4:1, +4 dBu) < 0,002 %
Transformer ratio 1 : 1
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 77304701751

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4.1 ★★★★★
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Verified Purchase
Kenneth J. Goodman Sr.
Massapequa, US
★★★★★ 4
Its good to have for electronics and kitchen items
I get the Insurance for certain Electronics and kitchen items.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
A
Verified Purchase
Annabanana
Omaha, US
★★★★★ 5
Worth the money.
Quick and easy claim process. My refund was processed the same day that I shipped back the product.
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Reviewed in the United States on April 13, 2026
L
Verified Purchase
LadyG
Grantham, US
★★★★★ 1
All Gotchas, Gimmicks, and Grief
My husband broke the item in question, which was a Chemex coffee maker made of nothing but glass. It shattered full of coffee, so like a normal human he cleaned up the dangerous mess and threw it away. I put in a claim, and it said that I had to ship back the product. Believing that the Asurion process was as simple as stated, and reading the agreement that does mention that sometimes they'll require shipment of the item, but that they will review cases and use reasonable judgment, I contacted their chat, explaining that the requirement that I mail them a wet pile of shards of glass soaked in coffee (and a little bit of blood) was unsafe and unreasonable. I don't even know how I could do that in a way that would be safe for the people opening the packaging, or even to take it to the store. The shards of glass might puncture any plastic, and the wetness would soak through, plus there's the biohazard issue. Seems silly for a $47 product replacement to me. I figured any human would understand. First chat associate closed my case without even responding to me. I had to reopen it. The second one told me, "Yes, that is how your warranty works" as an answer to my "Hello, the last chat closed without me talking to anyone." I tried to explain the situation, and was told "If you call the hotline, maybe they'll help you." I call the hotline. The first person tells me tough, I have to mail it. I say it was thrown away. He says "AHA then it's lost! Your warranty doesn't cover lost things!" I say no, it's not lost, it was disposed of properly as shards of glass should be. I finally ask can I speak to someone else or a supervisor. He lies and says yes. I sit on hold for 20 minutes, never any wait time or any sort of indicator of when someone will talk to me. The phone call quality finally gets very horribly staticky, so I hang up and try again. Hallelujah, I get a decent human being who immediately says, "Oh, no, that's not reasonable! That is an unsafe thing to have to mail. I'll send it to the override department who should approve this because it's obvious that's not a normal thing to expect." Today I get an email that says: We can't approve your claim. We reviewed your NO SUPPORTING MANUFACTURER COFFEE MAKER claim. The product in your claim is not covered by your plan. As a result, we're unable to approve your claim. Nothing about the requirement to mail a biohazard, just the item isn't covered even though the item is absolutely covered. While I understand that loss prevention is important, this is a very small potatoes return and it isn't like I made this up. It would be easy to make me happy. I'm sure it has cost them more money to deny it than they would have lost covering the Chemex. I've bought multiple of their product replacement policies before. I never will again. They didn't offer for me to send a picture or anything. They just wasted hours of my time and sent a clearly AI-based answer, rather than treating me like a valuable customer.
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Reviewed in the United States on February 28, 2024
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Verified Purchase
Lisa R.
Draper, US
★★★★★ 5
Fast!
Process was easy. Quickly issued a gift card for my refund.
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Reviewed in the United States on May 14, 2026
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Verified Purchase
vicki
Draper, US
★★★★★ 5
Great price great plans
Anyways a pleasure to work with asurion. Great plans
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026

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