BMW M6 Rear Deck Lid Speaker Size
The BMW M6 rear deck lid accommodates 1 inch speakers, supports 4 inch units, and accepts a 6.5 inch speaker size across the years covered. Compatible audio types for these locations include tweeters, midrange units, midbass, and full-range system components. The specifications span a range of years from 1987 to 2017.
| Year | Type | Size (inch) |
|---|---|---|
| 2017 | Tweeter | 1 |
| 2017 | Midrange | 4 |
| 2016 | Tweeter | 1 |
| 2016 | Midrange | 4 |
| 2015 | Tweeter | 1 |
| 2015 | Midrange | 4 |
| 2014 | Tweeter | 1 |
| 2014 | Midrange | 4 |
| 2013 | Tweeter | 1 |
| 2013 | Midrange | 4 |
| 2010 | Midrange | 4 |
| 2009 | Midrange | 4 |
| 2008 | Midrange | 4 |
| 2007 | Midrange | 4 |
| 2006 | Midrange | 4 |
| 1988 | Midbass / Full-Range | 6.5 |
| 1987 | Midbass / Full-Range | 6.5 |
Speaker Types
| Type | Description |
|---|---|
| Tweeter | A small driver built for high frequencies, typically from about 2,000 Hz to 20,000 Hz. It adds treble detail and clarity and is usually mounted near ear level or aimed at the listener. |
| Midrange | A driver for the middle of the audible range, typically from about 300 Hz to 5,000 Hz, where vocals and most instruments sit. It is often paired with a tweeter and a woofer. |
| Midbass | A driver tuned for upper bass and lower midrange, roughly from 80 Hz to 500 Hz. It has longer cone travel than a full-range unit, which supports stronger bass in doors and panels. |
| Full-Range | A single driver that reproduces bass through treble without a separate crossover network. It is the simplest replacement option and is common in factory audio systems. |
Additional Notes
- The rear deck lid of the BMW M6 is a horizontal surface positioned at the rear of the cabin, behind the rear seats and below the rear windshield, a location that radiates sound upward and forward into the cabin interior.
- A 1-inch tweeter handles high-frequency content, typically from around 2,000 Hz up to 20,000 Hz or beyond, and its small diaphragm allows rapid excursion at high frequencies, which is suited to the rear deck lid's reflective, rearward-facing acoustic environment where high-frequency dispersion benefits from the windshield's angled surface.
- The 1-inch tweeter position in the rear deck lid of the BMW M6 places high-frequency reproduction at the far end of the cabin, a placement that contributes to a distributed stereo soundstage when paired with front-channel components.
- A 4-inch midrange driver reproduces the mid-frequency band, generally spanning from approximately 300 Hz to 5,000 Hz, covering vocal fundamentals, upper harmonics, and the presence region of most instruments.
- The 4-inch cone diameter limits low-frequency extension relative to larger drivers, keeping the driver's output focused in the midrange band rather than extending into bass frequencies, which is consistent with a rear deck lid location where enclosure depth and volume are constrained by the deck structure.
- The pairing of 1-inch tweeters and 4-inch midrange drivers in the rear deck lid of the BMW M6 across the 2013-2017 model years indicates a 2-way speaker arrangement at that location, with each driver handling a distinct portion of the frequency spectrum.
- A 6.5-inch midbass or full-range driver covers a broader frequency span than a dedicated 4-inch midrange unit, with midbass operation typically beginning around 80 Hz and extending through the midrange, while full-range operation further extends coverage toward the high-frequency limit of the driver's capability.
- The 6.5-inch cone diameter moves a greater volume of air than a 4-inch cone, which contributes to lower-frequency reproduction and higher output levels at bass and midbass frequencies from the rear deck lid position.
- A full-range designation on the 6.5-inch driver indicates the driver is designed to reproduce the widest possible frequency spectrum without a dedicated crossover network, spanning from lower bass through treble within a single driver.
- The rear deck lid location in a vehicle like the BMW M6 typically provides a flat, rigid mounting surface, which reduces resonance and cabinet flex that could otherwise color the driver's output.
- The absence of a tweeter entry for the 2006-2010 and 1987-1988 model years indicates the rear deck lid in those configurations was populated with a single driver per channel rather than a multi-driver arrangement.
- The transition from a 6.5-inch midbass/full-range driver in the 1987-1988 models to a 4-inch midrange driver in the later models reflects a change in rear deck lid speaker sizing across the BMW M6's production span as documented in the specifications.