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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryRetail & CommerceRetail - Electronic DevicesZurichK55 GmbH
K55 GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of K55 GmbH is the sale of audio devices, particularly headphones, earphones, audio players and related accessories, both online and in their store in Zurich, where customers have the opportunity to test the devices before purchasing.

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Offering

Products & services

Industry:Retail - Electronic Devices
✓ Offered
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4.6/5

K55 GmbH

7
Ear-/Headphones
Headphones and earphones, including in-ear, over-ear and on-ear models; demo units in-store, on-site comparisons, advice and suitable accessories such as cases, cables, stands and pads.
DAP / Player
Audio players, streamers, radios and other digital music players; portable and stationary devices as well as the associated accessories and demo units in-store.
DAC / Headphone Amplifier
Digital-to-analogue converters and headphone amplifiers, portable or stationary; standalone DACs, combined units and demo devices for testing and comparison.
Accessories
Audio accessories for headphones, players and DACs, including cables, adapters, cases, bags, ear pads, head pads, stands, power supplies and storage media.
Repairs and Warranty Claims
Repair intake for devices purchased at K55, submission by post or drop-off in-store, warranty handling and paid cost estimates for non-warranty cases.
Demo@Home
Loan of selected products for testing at home, by appointment, with shipping or pickup, a trial period of three days and return or purchase afterwards.
Second-hand Offers
Buying and selling second-hand headphones, players, DACs and amplifiers; inspection, item descriptions, photos, online listings as well as processing of payment and shipping.
Trust & reputation

ranQ Trust Score of K55 GmbH: 4.6 out of 5.0

Trust Score4.6/ 5.0

Excellent

x

Data basis 96% · As of October 2026

K55 GmbH scores 96.5 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.93.824%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.100.010%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.100.08%
K55 GmbH scores 83.0 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
K55 GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
K55 GmbH scores 82.9 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.82.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

K55 GmbH reaches a ranQ Trust Score of 4.6 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.9 out of 5 stars from 239 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.9
of 5

Aggregated from 239 reviews across all connected sources

Sources
GGoogle4.9239
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Knowledge

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Location

Universitätstrasse 13
8006 Zurich
Opening hours
Mon
10:00 - 18:30
Tue
10:00 - 18:30
Wed
10:00 - 18:30
Thu
10:00 - 18:30
Fri
10:00 - 18:30
Sat
10:00 - 17:00
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-104.442.857
Founded
2001 · 25 years
Last commercial register change
March 11, 2015
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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