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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryArts, Culture & RecreationOrchestras & MusiciansZurichPromusig professional E. Kahn & A. Engi
Promusig professional E. Kahn & A. Engi Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Promusig professional E. Kahn & A. Engi operates a music retail store and an online shop selling musical instruments, accessories and electronic music equipment. Services include instrument sales, music lessons, repair and service work, and offerings of used instruments and trade-ins.

AI-generated
Offering

Products & services

Industry:Orchestras & Musicians
✓ Offered3
Online shop
Online shop for musical instruments and music accessories, selling synthesizers, keyboards, guitars, effects, microphones, studio monitors and other equipment.
Music lessons
Music lessons for guitar and bass, with one-to-one instruction, individual lesson planning, fundamentals for beginners, licks, riffs and hands-on training.
Instrument advice and sales
Advice and sales of instruments and accessories, including in-store try-outs, trade-in options, used equipment and replacement instruments or repair service.
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4.5/5

Promusig professional E. Kahn & A. Engi

Trust & reputation

ranQ Trust Score of Promusig professional E. Kahn & A. Engi: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Promusig professional E. Kahn & A. Engi scores 91.2 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.84.624%
  • 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%
Promusig professional E. Kahn & A. Engi scores 81.0 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%
Promusig professional E. Kahn & A. Engi 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%
Promusig professional E. Kahn & A. Engi scores 71.4 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 35.71.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Promusig professional E. Kahn & A. Engi reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.7 out of 5 stars from 506 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
4.7
of 5

Aggregated from 506 reviews across all connected sources

Sources
GGoogle4.7506
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Sihlfeldstrasse 138
8004 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 - 16:00
Sun
Closed

At a glance

Legal form
General Partnership
UID
CHE-107.957.721
Founded
1992 · 34 years
Last commercial register change
July 6, 2004
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.79.06%
  • 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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