Source comparison · 19 October 2026
SD and HD: keep the complete code attached
The current NV-SR100SD webpage table gives 12 V, 100/150/200 W wording, 8/4 Ω and 140(160) × 116 × 50 mm. The separately named NV-SR100HD PDF row gives 12/24 V, 100 W, 8/11 Ω and 180 × 177 × 82 mm. Its annotated photograph instead shows 62 mm height. Similar finned housings do not establish an alias, replacement or shared pinout.
Ask for a documented model mapping
Request a current complete code, labelled photograph, drawing and electrical sheet. Ask whether the references denote different assemblies, revisions or source errors. Keep the source-specific entries together until that question is resolved. No automatic alias, inventory, compatible connector or safe replacement claim is made. The original webpage data, image and purchase routes remain available above.
https://www.novavehicle.com/siren-amplifier.html
https://www.novavehicle.com/upload/6649/20251126091527313516.pdf
Official PDF pages 21–22, printed 39–42. Publication date unverified; supplier acoustic and approval entries are not independent test evidence.