koss.com
Koss Stereophones
Last scanned Aug 24, 2026, 1:22 PM · 1 view
Overall score
Great
Summary
Experience some of the most celebrated Koss Headphones around the world like A/550, Pro/4AA, Porta Pro® Wireless and KPH40. This website uses Shopify hosted on Cloudflare behind Cloudflare CDN. SEO is good (75/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.
Experience some of the most celebrated Koss Headphones around the world like A/550, Pro/4AA, Porta Pro® Wireless and KPH40. Find your perfect pair today!
- Canada
- Hosted on Cloudflare
Top issues to fix
7 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
+1 more issue — details in the sections below.
SEO
4 issue(s) found
Performance
8 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Experience some of the most celebrated Koss Headphones around the world like A/550, Pro/4AA, Porta Pro® Wireless and KPH40. Find your perfect pair today!
Meta tags
- Title
- Koss Stereophones
- Description
- Experience some of the most celebrated Koss Headphones around the world like A/550, Pro/4AA, Porta Pro® Wireless and KPH40. Find your perfect pair today!
- Canonical
- https://koss.com/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 23.227.38.65
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- koss.com
- Valid from
- Aug 2, 2026
- Valid to
- Oct 31, 2026
- Days until expiry
- 67
- SAN domains
- koss.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyEnabled
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 2 · H2 0 · H3 0
Links
64 internal · 9 external · 20 broken
Images
18 total · 0 missing alt
Scripts / Styles
76 scripts · 7 stylesheets
JS / CSS size
864 KB · 20.8 KB
Page size
9.0 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Multiple H1 headings found
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://koss.com
- Final URL
- https://koss.com
- HTTP status
- 429
- HTTP version
- HTTP/2
- Response time
- 8 ms
- HTML size
- 9.0 KB
- Redirect chain
- https://koss.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does koss.com use?
- koss.com is built with Shopify, Google Analytics, Meta Pixel.
- Is koss.com secure (HTTPS)?
- Yes. koss.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 31, 2026.
- Who hosts koss.com?
- koss.com is hosted on Cloudflare, behind Cloudflare CDN.
- What is koss.com's SEO score?
- koss.com scored 75/100 for SEO in the latest analysis (fair).
- What is koss.com's overall website score?
- koss.com has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card