Monoprice Introduces Monolith THX In-Wall Speakers

Monoprice has been very active in the speaker and subwoofer categories over the past year with a number of new product introductions under their Mononlith brand (see links at the end of this article). Their latest entries are the THX Certified THX-275IW and THX-465IW in-wall speakers. 

Tip: These speakers should be a great complement to Monoprice’s recently announced M-IWSUB8 and M-IWSUB82 In-Wall Subwoofers.

Features Shared by Both Speakers

• THX Certification: This speaker line has been submitted and passed THX standards for application and performance. The THX-275IW is THX Select Certified (Suitable for rooms up to 2,000 cubic feet in size) while the THX-465IW  is THX Ultra Certified (Suitable for rooms up to 3,000 cubic feet in size).

• Speaker Design: Both speakers incorporate a 3-way design (tweeter, midrange, woofer).

• Impedance: Both speakers have a 4-ohm impedance. Make sure your amplifier or receiver can double its power output into 4 ohms.

• Connections: Each speaker has a set of spring‑loaded binding posts.

• Easy Install: The heavy‑duty dog-ear mounting system makes for a fast and problem-free installation. The magnetically detachable grille is powder coated in white and can be painted to match any decor

Tip: Monolith™ THX® Certified in‑wall and in‑room speakers use the same driver and crossover components. This means you can mix and match Monolith THX-certified speakers to suit any room. Using Monolith THX in‑wall and in-room speakers for the left, center, right, and, rear channels in a home theater will still be timbre matched.

Monolith THX-275IW

• Product Number: 42830
• Tweeter: 1x 25mm silk dome with neodymium magnet
• Mid-range: 1x 50mm silk dome
• Woofer:  1 x 6.5″ long fiber pulp cones with NBR surrounds
• Grill Color: White
• Frequency Response: 43Hz to 20kHz ±3dB
• Sensitivity: 87.6dB (2.83V/1m)
• Low-Frequency Crossover: 550Hz @6dB/oct
• Midrange Crossover: 550Hz to 3.1kHz @12dB/oct
• High-Frequency Crossover: 3.1kHz @12dB/oct
• Amplifier Power Range: 50 to 300 watts
• Dimensions (HxWxD): 16.5″ x 11.1″ x 3.7″ (419 x 281 x 94 mm)
• Weight: 11 lbs. (5.0 kg)

Monolith THX-465IW 

• Product Number: 42829
• Tweeter: 1x 25mm silk dome with neodymium magnet
• Mid-range: 1x 50mm silk dome
• Woofer:  4x 6.5″ long fiber pulp cones with NBR surrounds
• Grill Color: White
• Frequency Response: 37Hz to 20kHz ±3dB
• Sensitivity: 88.0dB (2.83V/1m)
• Low-Frequency Crossover: 750Hz @6dB/oct
• Midrange Crossover: 750Hz to 3.4kHz @12dB/oct
• High-Frequency Crossover: 3.4kHz @18dB/oct
• Amplifier Power Range: 50 to 450 watts
• Dimensions:  Dimensions (HxWxD) 36.3″ x 11.1″ x 3.7″ (921 x 281 x 94 mm)
• Weight: 26.9 lbs. (12.2 kg)

Price & Availability

• THX-275IW  (Product Number: 42830) – $349.99 at Monoprice.com

• THX-465IW (Product Number: 42829) – $699.99 at Monoprice.com

Tip: If you don’t have experience installing in-wall speakers, you should consult a home theater installer. 

Related Reading:

• Monoprice Monolith In-Wall Subwoofers

• Monoprice Monolith THX LCR & Satellite Speakers

• Monoprice Monolith Dual Driver THX Ultra M-210 And M-212 Subwoofers

• Monoprice Monolith Encore Home Theater Speakers Are Very Affordable

• Monoprice Monolith THX Subwoofers Shake The Foundation

• Monoprice Shakes Things Up With Two New Massive THX Subwoofers [Updated]

Tip: If you need an amplifier(s) to go with your speakers, check out:

• Monoprice Monolith Class D Power Amplifiers Unveiled