Mackie CR4.5BT: Bigger Bass, Wireless Convenience, Studio Honesty

The Mackie CR4.5BT is a pair of 4.5-inch powered studio monitors that combine the CR series' larger, deeper-reaching woofer with built-in Bluetooth streaming, so you get more low-end authority and the freedom to play music wirelessly from any device. Fifty watts of bi-amplified Class A/B power drive a 4.5-inch woven woofer and a 1-inch silk-dome tweeter down to a -10 dB point of 55 Hz and up to 101 dB SPL, while a front-panel tone knob and TRS, RCA, and 3.5 mm inputs round out a genuinely do-everything speaker. For a larger desk or a small room that needs both accuracy and effortless wireless playback, it is the top of the compact CR lineup.

Bluetooth Streaming Without Losing the Wired Workflow

The CR4.5BT's built-in Bluetooth receiver pairs straight to a phone, tablet, or laptop and streams full-range stereo with no interface or adapter required. The wireless input runs alongside the wired connections instead of replacing them, so a DAW interface can stay patched into the TRS inputs for tracking and mixing while you stream reference tracks or a playlist over Bluetooth — one pair of speakers covering the whole session and the party afterward.

A 4.5-Inch Woofer That Moves Real Air

The 4.5-inch woven woofer is what sets this model apart: more cone area extends usable low frequencies to a -10 dB point of 55 Hz and lifts peak output to 101 dB SPL, giving electronic, hip-hop, and cinematic content the physical low-end that smaller monitors only hint at. A 1-inch silk-dome tweeter with protective grille carries the highs to 20 kHz, and a 3.0 kHz crossover joins the two for a seamless response — deep and detailed without a subwoofer, though a CR-series sub can extend the bottom octave when you want it.

The Tone Control: Flat Reference to Full-On Fun

The front-panel tone knob turns the CR4.5BT from a studio tool into an entertainment system and back. All the way left it is flat and transparent for tracking and mixing; all the way right it boosts bass and treble into an exciting "smiley face" curve for gaming, movies, and casual listening; at center it blends the two. The same control shapes wired and wireless sources alike, so the speaker always suits what you are doing.

50 Watts, Full Connectivity, Flexible Placement

Fifty watts RMS of bi-amplified Class A/B power drive the pair from a solid MDF cabinet with a custom-tuned rear port for tight, extended bass. Balanced/unbalanced 1/4-inch TRS, unbalanced RCA, and a 1/8-inch (3.5 mm) stereo input all stay live and sum together alongside Bluetooth, a front-panel headphone output mutes the speakers for private listening, and rear location and powered-speaker position switches tune the voicing and set the active monitor for desktop or bookshelf placement on either side.

Who the CR4.5BT Is For

Bass-forward producers, cinematic gamers, and creators who want the biggest, most flexible compact CR monitor choose the CR4.5BT for its deeper woofer and wireless streaming. Wire in an interface for serious work, stream from your phone for everything else, and lean on the tone knob and 4.5-inch woofer to make one pair of speakers handle the whole room — accurately when you need it, thrilling when you want it.