


See Options
1 Year
$15.99
2 Year
$23.99
3 Year
$35.99
Need help? Ask our experts.
Review Summary
Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500
Browse our FAQ
30 watts (EIA 426B)
87.8dB SPL (avg) measured 2.83V at 1m
Max SPL 102.6dB (calculated value based on power rating and measured sensitivity)
8 ohms (nominal), minimum 6.4 ohms at 508Hz
81Hz-20kHz (+6dB); 50Hz-20kHz (+8.1dB)
5000Hz, 1st order high-pass filter
135 degrees at 2000Hz octave (-6dB)
Polypropylene with rubber half-roll (up) surround
10 oz (283.49g)
Material: Ferrite ceramic
1" (2.54cm)
Material: Copper wire over aluminum former
Quick connect type - two 0.187" spade lugs (push terminals)
1.75" (4.45cm) housing with 1" (26mm) Dia. balanced-drive dome
0.06 oz (1.70g)
Material: neodymium magnet
0.5" (1.27cm)
Material: liquid cooled copper wire
20-gauge stamped steel with black enamel paint
5.03" (12.78cm)
4.69" (11.91cm) with 4 obround holes spaced at 90 degrees and 4 round holes spaced at 90 degrees
4.13" (10.49cm)
2.25" (5.72cm)
70V
8W
1, 2, 4, 8W
8, 4 ohms
50Hz-15kHz (+/-1dB)
8" (20.32cm)
Color-coded
Torsion
20-gauge steel outer ring with punched center, contoured edge
White
7.25" (18.42cm) diameter
0.25" (0.64cm)
Torsion bracket spring devices accommodate a variety of ceiling depths, welded studs with nuts
Transformer: 2.38 x 2.88 x 1.68" (6.05 x 7.32 x 4.27cm)
Driver: 1.75 lbs (0.79kg)
Bring superior sound quality to your space with the WB4T-4A30-T870 Speaker/Grille Assembly. This high-quality audio equipment, crafted by the reputable Lowell Manufacturing, includes a 4" 30W coaxial driver, an 8W transformer, and a stylish white torsion grille.
Designed for in-ceiling installation, this speaker assembly offers a discreet and aesthetically pleasing solution for your audio needs. It's perfect for enhancing the ambiance in hotel lobbies, retail stores, transportation terminals, and other similar venues with its high-quality paging and background music reproduction capabilities.
The 4" 30W coaxial driver delivers a wide 135-degree sound dispersion, ensuring large coverage areas with uniform response and clear audibility. It features a ten oz. magnet and a 1" copper voice coil driving a polypropylene cone with a half-roll rubber surround, ensuring long cone travel and excellent edge damping. The post-mounted, liquid-cooled tweeter is a 1" dia. balanced drive dome with a first-order highpass filter, providing a frequency response of 70Hz-20kHz (+6dB) and 50Hz-20kHz (+8.8dB) with a crossover at 5kHz.
The 8W transformer, with primary taps at 8, 4, 2, 1 watt, offers a frequency response of 50Hz-15kHz (+1dB). It's ideal for high-quality audio systems and general-purpose paging applications where wide frequency response, low insertion loss, and high power handling are critical. The transformer features an industry-standard open-housing design and color-coded leads for quick and easy installation.
The white torsion grille, designed for use with a 4-inch speaker, adds a sleek touch to your space. It's made from durable steel with a low projection and contoured edge, ensuring a seamless fit with your ceiling.
This speaker/grille assembly is made in the U.S.A. with global components and is UL1480 listed for general signaling and UL2043 rated for use in plenum space when used with an approved backbox. Choose the WB4T-4A30-T870 Speaker/Grille Assembly for a reliable, efficient, and stylish audio solution.
https://www.lowellmfg.com/limited-warranty
800-325-9660