# Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N: specs and price

**Price (US):** Not published (Humminbird's own product page for this exact unit states it is discontinued and shows no price; no US MSRP appears anywhere on humminbird.johnsonoutdoors.com for any HELIX SKU checked (Humminbird uses dealer/MAP pricing, not a published storefront price). The seeded name 'HELIX 9 CHIRP MEGA SI' is missing the '+' and 'G4N' that Humminbird's own site uses for the exact model; corrected here to match the manufacturer's naming, though this generation is no longer an active catalog item (the current 9" HELIX offering is sold only bundled, as the 'ICE HELIX 9 MSI+ GPS G4N MEGA 360 Bundle').), as of 2026-08-01.
**Brand:** Humminbird

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | Not published |
| Brand | Humminbird |
| Display size (in) | 9 |
| Resolution px | 1024x600 |
| Sonar builtin | MEGA CHIRP + MEGA Side Imaging+ + MEGA Down Imaging+ |
| Chirp frequencies (kHz) | MEGA CHIRP: full 150-220, narrow 180-240, wide 140-200, optional 28-250; MEGA SI+ 1050-1175; MEGA DI+ 1100-1200; also supports 50/83/200/455/800 |
| Gps type | Internal GPS receiver with trackplotting; Humminbird Basemap preloaded (10,000+ lakes plus US coastal) |
| Touchscreen | No |
| Networking | Ethernet (5-port switch compatible), NMEA 2000, Bluetooth, Wi-Fi, One-Boat Network |
| Preloaded charts | Humminbird Basemap (10,000+ lakes plus continental US coastal coverage); LakeMaster/CoastMaster/Navionics compatible but sold separately |

## Where it stands

On the spec sheet, its display size of 9 in is at the median of the 13.

## Frequently asked questions

**How much does the Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N cost?**

The Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N has no published US price as of 2026-08-01.

**What are the Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N's key specs?**

Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N (Humminbird): display size in 9, resolution px 1024x600, sonar builtin MEGA CHIRP + MEGA Side Imaging+ + MEGA Down Imaging+, chirp frequencies khz MEGA CHIRP: full 150-220, narrow 180-240, wide 140-200, optional 28-250; MEGA SI+ 1050-1175; MEGA DI+ 1100-1200; also supports 50/83/200/455/800, gps type Internal GPS receiver with trackplotting; Humminbird Basemap preloaded (10,000+ lakes plus US coastal). Full sourced spec sheet verified 2026-08-01.

Source: https://humminbird.johnsonoutdoors.com/us/shop/fish-finders/helix/helix-9-chirp-mega-si-gps-g4n (humminbird.johnsonoutdoors.com, accessed 2026-08-01)
Canonical: https://frontdeskreview.com/product/marine-chartplotters/humminbird-helix-9-chirp-mega-si-plus-gps-g4n/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl