SKU: 77304701751

Palmer PWUPPER Passive Line Isolation Box

Sale price$156.59 Regular price$173.99
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Ships within 48 hours · Estimated delivery Aug 20 - Aug 25

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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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4.4 ★★★★★
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K
Verified Purchase
Kelly
Dallas, US
★★★★★ 5
Very stylish
Size: 3.5 Big Kid, Color: Light Pink
My daughter was so excited to get these shoes. They are stylish and comfortable!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
H
Heather T.
Los Angeles, US
★★★★★ 1
Too tight at opening
Size: 13 Little Kid, Color: Light Pink
I bought a size larger for my child, and the foot won’t go in. Her other sketchers slides are great. But I do not recommend this model.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
L
Verified Purchase
Linda Wilson
Draper, US
★★★★★ 5
Her go to pair!
Size: 13 Little Kid, Color: Lavendar
Good quality shoes and she loves them! Slips her foot right in! Her go to pair !
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Reviewed in the United States on May 15, 2026
J
Verified Purchase
Janie L Bobst
Bozeman, US
★★★★★ 5
It’s a perfect shoe without the correct width it needed to be wider
Size: 5 Big Kid, Color: Lavendar
The app suggested a 6.5 but I needed it in wide and it was not an option. I had to send them back because they were too tight!
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Reviewed in the United States on April 11, 2026
S
Verified Purchase
Shirley Embree
Lexington, US
★★★★★ 5
That the shoes got here in time.
Size: 10.5 Little Kid, Color: Light Pink
The shoes a perfect.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026

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