Audio Science Review (ASR) Measurement Thread Scraper

Scrapes measurement threads from the Audio Science Review (ASR) forum — the internet's leading independent audiophile measurement database. Extracts structured data including SINAD, THD+N, dynamic range, frequency response, and Amir's verdict from DAC, amplifier, headphone, and speaker review threads.

What does it scrape?

Audio Science Review is the authoritative source for objective audio equipment measurements. Amir Majidimehr's SINAD-led methodology has reshaped how DAC and amplifier quality is evaluated — brands now quote ASR scores in their marketing. The forum contains over 30,000 measurement threads across all major audio equipment categories.

This actor extracts:

• Thread metadata — title, thread ID, author, timestamps
• Measurement data — SINAD (dB), THD+N (%), dynamic range (dB), frequency response
• Amir's verdict — Recommended, Not Recommended, Highly Recommended, etc.
• Product info — product name and manufacturer parsed from the title
• Community stats — reply count, view count, last reply timestamp
• Measurement images — URLs to all measurement image attachments in the opening post
• Full opening post — complete plain-text body of the review post

Input configuration

Field	Type	Description	Default
maxItems	integer	Maximum number of threads to scrape	Required
forumUrls	array	ASR subforum URLs to crawl	DAC + headphone + headphone-amp subforums

Example input

{
  "maxItems": 500,
  "forumUrls": [
    "https://www.audiosciencereview.com/forum/index.php?forums/digital-to-analog-dac-reviews-and-discussion.10/",
    "https://www.audiosciencereview.com/forum/index.php?forums/headphone-iem-reviews-discussions.58/",
    "https://www.audiosciencereview.com/forum/index.php?forums/headphone-amplifier-reviews-discussion.50/"
  ]
}

Default subforum coverage

When forumUrls is omitted, the actor crawls these subforums:

• DAC Reviews and Discussion
• Headphone & IEM Reviews
• Headphone Amplifier Reviews
• Headphones and Headphone Amplifier Reviews
• Power Amplifier / DAC AIO Reviews

Output format

Each record corresponds to one thread:

{
  "thread_id": "62806",
  "thread_title": "SMSL D1 - ROHM DAC for everyone",
  "product_name": "SMSL D1 - ROHM DAC for everyone",
  "manufacturer": "SMSL",
  "category": "dac",
  "sinad_db": 117.4,
  "thd_n_percent": null,
  "dynamic_range_db": null,
  "frequency_response_hz": "20 Hz - 20 kHz",
  "amir_score": "Recommended",
  "opening_post_body": "This is a review and detailed measurements...",
  "measurement_image_urls": "https://www.audiosciencereview.com/forum/index.php?attachments/... | ...",
  "thread_url": "https://www.audiosciencereview.com/forum/index.php?threads/smsl-d1-rohm-dac-for-everyone.62806/",
  "author_username": "amirm",
  "posted_at": "2023-05-10T14:22:41+0100",
  "reply_count": 284,
  "view_count": 92000,
  "last_reply_at": "2026-04-15T09:18:05+0100",
  "scraped_at": "2026-05-27T11:45:01.567Z"
}

Notes on measurement fields

• sinad_db, thd_n_percent, dynamic_range_db — parsed from the opening post text via regex. Not all threads include explicit measurement values (especially discussion-only threads).
• amir_score — extracted when Amir's verdict phrase appears verbatim in the opening post. Typical values: Recommended, Highly Recommended, Not Recommended, Neutral.
• measurement_image_urls — pipe-separated list of attachment URLs for measurement charts (frequency response, distortion plots, etc.).
• opening_post_body — capped at 8,000 characters.

Use cases

• AI recommendation engines — power hi-fi gear recommendation tools with objective measurement data
• Retailer filtering — build "ASR-recommended" filter tags for e-commerce product catalogs
• Competitive intelligence — track how brands' products measure relative to competitors
• Research datasets — create training data correlating specifications with measured performance

Performance

• Crawls approximately 20 threads per forum listing page
• Polite concurrency (5 parallel requests) to avoid overloading the ASR community forum
• Pagination handled automatically — crawls all forum pages until maxItems is reached
• Rate-limit detection with automatic backoff

Limitations

• Measurement values (SINAD, THD+N, etc.) are extracted via text regex from opening posts — only available when Amir writes the value explicitly in text form. Image-only measurements are not OCR'd.
• The actor crawls all threads in target subforums, including discussion threads not authored by Amir. Filter by author_username: "amirm" to isolate Amir's measurement reviews.