Speaker

Speakers are lawn obstacles spawned in the boss battle with Zombot Multi-stage Masher on Neon Mixtape Tour - Day 32. Speakers thump out a powerful beat every few seconds to damage two plants in front of them, but they cannot damage Phat Beet and Celery Stalker (when hiding). They also have the ability to generate an extremely powerful shockwave empowered by bass that topples down all plants and zombies in its vicinity, sending them flying left of the screen. However, this ability is disabled during rap and 8-bit jams. Aside from that, speakers also act as obstacles that is similar to tombstones, surfboards, frozen blocks, and backpacks.

Trivia

 * Speakers can also instantly kill Zombot Multi-stage Masher as shown here at 3:08. To do this, have a Breakdancer Zombie toss the Zombot on rap stage twice. Toss the Breakdancer Zombie at two-second interval so it will not get tossed away from the lawn. If done right, use Power Snow more frequently until it reaches the metal phase (or you can wait to use it's speaker attack). It will then be killed instantly if one of the five speakers adjacent to the Zombot's original position is still present.
 * Shockwaves generated by the speaker and Hair Metal Gargantuar are different from each other. The shockwave generated by the speaker can send all plants and zombies it hits flying to the left of the screen while the shockwave generated by Hair Metal Gargantuar's guitar can only hit one plant (two if he slams a plant that is extremely close to him, i.e. the player places a plant in front of him) and does not harm zombies.
 * During the fifth and last phase, speakers launch shockwaves the most often.
 * Additionally, in the first and second phases, speakers fall and launch shockwaves at a steady rate.
 * Out of all lawn obstacles, then this is the only lawn obstacle where having most ability.