Infinity Reference REF-275tx
3/4″ textile dome tweeters
3/4″ textile dome tweeters (pair)
flush- and surface-mount hardware included
Starfish™ bracket for mounting in factory tweeter locations
2,500 Hz passive in-line crossovers included
handles up to 45 watts RMS (135 watts peak power)
frequency response: 2,500-21,000 Hz
sensitivity: 93 dB
top-mount depth: 7/8″
Features & specs
Tweeter Design 3/4″ Edge-Driven Dome
Impedance (Ohms) 3
Tweeter Composition Textile
Woofer Composition —
Woofer Surround —
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 93
Frequency Response 2500 – 21k Hz
Minimum RMS Wattage —
Maximum RMS Wattage 45
Peak Power Handling (Watts) 135
Top-mount Depth (Inches) 0 7/8
Bottom-mount Depth (Inches) 0 15/16
Cutout Diameter or Length (inches) 1 5/8
Tweeter Material: Each tweeter features a 3/4″ edge-driven textile dome for smooth, accurate highs.
Tweeter Mounting: The I-Mount tweeter mounting system and Starfish mounting brackets give you several different ways to mount the tweeters:
I-Mount: The tweeters can be surface- or flush-mounted with Infinity’s innovative I-Mount system:
Surface Mount: Surface mounting the tweeters involves screwing the surface-mount cup to the mounting location, then inserting and locking the tweeter into the cup.
Flush Mount: Flush mounting is made easy through the use of the threaded flush-mount housing and plastic locking nut. Once a cutout is made, the tweeter is installed in the flush-mount adapter, then into the flush mount housing and inserted into the hole. The large plastic locking nut is threaded onto the adapter (from behind the mounting surface) to hold the complete assembly securely in place. When flush mounted, the tweeters may be angled for optimum response and imaging.
Starfish Mounting Brackets: The Starfish mounting brackets allow the tweeters to be installed in factory locations behind the grilles:
Bottom Mount: Once the Starfish bracket is trimmed, it is secured to the underside of the grille panel. The tweeter must be inserted into the bracket and locked into place before the bracket is mounted.
Surface Mount: Once the Starfish bracket is trimmed, it is screwed to the top of the mounting surface behind the grille panel. Then, the tweeter is inserted into the bracket and locked into place.
Flush Mount: There are two sets of tabs to flush mount the tweeter in the Starfish bracket, yielding different mounting dimensions. The upper tabs mount the tweeter completely below the opening and are glued in place. The lower mounting tabs are screwed in place and result in a mounting height just under a half inch. Once the bracket is mounted, the tweeter is inserted into the bracket and locked into place.
Tweeter Mounting Dimensions:
I-Mount Surface Mount I-Mount Flush Mount Starfish Bottom Mount Starfish Surface Mount Starfish Flush Mount Starfish Flush Mount (below mounting surface)
Mounting Height 0.862″ 0.654″ 0.0″ 0.857″ 0.386″ 0.286″
Depth screw depth 0.820″ 0.930″ screw depth 0.471″ 0.571″
Frame Diameter 1.478″ 1.840″ 3.036″ 2.440″ 2.330″ 2.330″
Cutout Diameter N/A 1.580″ N/A N/A 1.504″ 1.257″
Crossover Connections: Each crossover has 23″ input leads and 33″ output leads. The output leads are terminated with female quick-slides (that mate to the male quick-slides on the wire attached to the tweeters) and the input leads have bare wire.