hertz-audio.com

https://hertz-audio.com· First analyzed 04 Jun 2026· Updated 04 Jun 2026

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hertz-audio.com

Mobile

Sponsored

Hosting Provider

Google Cloud Platform

cloud.google.com

IP Address

35.207.151.200

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Frankfurt, Germany

ASN

AS15169

Organization

Google Cloud (europe-west3)

Server

Nginx

CDN

Proxy Cache

Nameservers

ns2.siteground.net.ns1.siteground.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

334 ms10%

Speed Index

434 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

25 KB

133 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

WordPressv7.0

Infrastructure

Hosting

Google Cloud Platform

CDN

Proxy Cache

Technology Stack

19 Technologies Detected

Libraries

Analytics

Plugins

CSS Frameworks

Frameworks

Other

Icon Libraries

Fonts

Tag Managers

Customer Support

Other

Web Servers

SEO Analysis

B78/100

Meta Tags14/15

Content12/12

Headings3/8

Technical19/21

E-E-A-T2/7

Images3/7

Links4/5

URL5/5

Social5/5

Freshness4/4

Mobile4/4

Indexability3/3

hertz-audio.comhertz-audio.com

Hertz car audio systems | The Sound Experience

Hertz produces high-performance car audio systems driven by research: V-cone®, Boundary Free Surround Tetolon Fibre, Rotary High Frequency Contour

Title Length46 chars

Recommended: 50-60 chars (~281px / 580px)

Description Length146 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (33/59) — critical for accessibility and SEO

6 issues found

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Local SEO

Local Search Readiness

18/100

Poor

5 12

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D49/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

8/25

Citation

12/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:3%

Words:759

Token eff.:Optimal

Sections/1K:15.8

Structured Data

5 JSON-LD

Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary377w

Descriptive Headingsavg 2w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

60/100

Passed

Critical

Warnings

Images & Alt Text

10/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

11/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

5/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

8/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

5 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

69/100

A+

3 mg

CO₂e / view

24.8 KB

Page Weight

95%

Cleaner Than

New Visitor

3 mg

Returning (cached)

1 mg

Annual (10K/mo)

300 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

2 mg

Resource Breakdown

HTML

24.8 KB

Green Hosting Verified

Google Cloud

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

78d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

23.05.2026

Valid Until

21.08.2026

Subject Alternative Names (2)

*.hertz-audio.comhertz-audio.com

SHA-256 Fingerprint

FF:AA:4E:22:1A:0A:EE:6F:59:F3:D3:90:09:68:E0:9E:14:20:10:8A...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Thu, 04 Jun 2026 19:17:15 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

host-header

6b7412fb82ca5edfd0917e3957f05d89

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

mx20.mailspamprotection.com

mx10.mailspamprotection.com

mx30.mailspamprotection.com

Domain Information

hertz-audio.com

Domain Age

5y 2m

Created

01.04.2021

Expires

01.04.2027

Last Updated

15.03.2026

Registrar

EuroDNS S.A.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

74/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1.0

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Times New Roman

WCAG Fail

55/100

Readability

/30

22/30

16px · LH --

Hierarchy

/20

8/20

WCAG

/25

12/25

1.09:1 min contrast

Performance

/25

13/25

1 font · 1 req

Heading Font

Times New Roman

Serif

Body Font

Times New Roman

Serif16px

Contrast Ratio

1.09:1

50 issues

Reading Comfort

~43 CPL

Narrow lines

24px

19px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

❌ Low contrast: 50 elements fail WCAG AA (min 1.1:1). Increase text/background contrast.

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

GGoogle Fonts Buy on MyFonts

Color Palette

6 unique colors

13.76:1 AAA Dark

#202123

Other· 65.7%

#ededed

Background· 10.6%

#171751

Primary· 3.2%

Business & Marketing Stack

6 Tools Detected

Enterprise

Customer Support

ZendeskEnterprise

Live chat and helpdesk tools

Behavior Analytics

Google Tag ManagerFree

HotjarMid-Market

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

GDPR Cookie ConsentFree

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

hertz-audio.com(12)capturly.com(1)connect.facebook.net(1)googletagmanager.com(1)static.hotjar.com(1)

Website Identity

Hertz Audio

Organization

Hertz produces high-performance car audio systems driven by research: V-cone®, Boundary Free Surround Tetolon Fibre, Rotary High Frequency Contour

hertz-audio.com/

5 years old

Location detected: 🇩🇪 Germanyvia ip

EuroDNS S.A.en-US

Social Profiles

Facebook Instagram YouTube

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Last analyzed: 04 Jun 2026 at 19:17

Historical Analysis & Change Tracking