Earthquake speakers that sit inside a wall or ceiling look simple on the shelf and are unforgiving on site. Each one needs a cut-out of a known size and a cavity of a known depth, and the cavity is only open once. This post lists the mounting figures from the Earthquake Sound brochure, how the in-wall subwoofer is meant to be fitted, and what to settle before the ceiling closes.
Why does hidden audio need planning earlier than most things?
A freestanding speaker can be moved if the room sounds wrong. A speaker in a wall or ceiling cannot, so its position, its depth and its cable all have to be right before the plaster or the false ceiling goes up. Cable is the cheap part, and it is the part people skip.
Three questions decide most of it: is there enough depth above the ceiling, where does the subwoofer go, and which amplifier will drive it. The brochure answers the first two in numbers. The third you should settle with us for your room.
How deep does an in-ceiling speaker need to be?
The brochure lists a cut-out and a mounting depth for each model. The mounting depth is the space the speaker needs behind the ceiling surface. A false ceiling of a few centimetres can take the smallest models and not the largest.
| Model | Type | Cut-out | Mounting depth |
|---|---|---|---|
| ECS3.0 | 3-inch edgeless ceiling speaker | 65 mm diameter | 58.8 mm |
| ECS4.0 v2 | 4-inch edgeless ceiling speaker | 99 mm diameter | 75 mm |
| IQ6D | 6.5-inch edgeless IQ ceiling speaker | 200 mm diameter | 95.5 mm |
| IQ8D | 8-inch edgeless IQ ceiling speaker | 240 mm diameter | 121 mm |
Figures are from the Earthquake Sound brochure, pages 16 and 17. The brochure lists other ceiling series with their own depths, so ask us for the one you are considering. Allow for more than the listed depth in a real ceiling, because the speaker is not the only thing above the board: pipes, cable trays, air-conditioning ducts and joists all take room.
What about the LCR speakers in the wall?
LCR means left, centre and right: the three front speakers of a home theatre. The brochure lists the Cinénova Clarté LCR speakers both in-wall and on-wall. The IW-C5 in-wall model lists a mounting depth of 100 mm and a cut-out of 156 mm by 1,017 mm, which makes it a long, low opening. On-wall versions need no cut-out and no depth, but they do stand out from the surface, so decide this with your interior designer before the wall is finished.
An in-wall LCR also has to sit where the screen will be. Settle the screen size and position first, then the speaker openings. The reverse order tends to leave a centre speaker behind the picture.
How is the in-wall subwoofer fitted?
The IW-SUB10 is the in-wall subwoofer in the brochure. Per the brochure it has a 10-inch active driver and a 10-inch passive radiator, a paintable grille, and it is designed for walls where the studs are 16 inches on centre, which is about 406 mm. It is listed as 711 mm tall, 473 mm wide and 95 mm deep, with a cut-out of 610 mm by 349 mm. Its maximum power handling is 400 W at 4 ohms.
That list tells you what to check on site. The wall needs studs at a spacing the subwoofer was designed for, enough depth for the 95 mm body, and a clear opening of the cut-out size. Many Indian homes have brick or concrete walls, where the arrangement does not apply and the fitting is different. If your wall is masonry, ask us before you choose a model. We would rather say so now than after the wall is built.
The brochure names an Earthquake XJ300ST amplifier as the recommended partner for the IW-SUB10. We suggest confirming the amplifier for your room with us rather than choosing one by wattage alone, since the right match depends on the speaker, the room and the rest of the system.
Smaller in-ceiling and in-wall subwoofers are also listed: the SUB-6 and SUB-8, each with a built-in crossover and a round or square grille. They need cut-outs of about 197 mm and 240 mm and depths of 86 mm and 92 mm. They are an option where there is no room for the larger unit.
What should you do before the ceiling closes?
- Fix the room layout. Where the seating, the screen and the doors are decides every speaker position.
- Pull the speaker cable now. Run a cable to each planned speaker position and to the subwoofer. The brochure recommends 12 gauge for its edgeless LCR line, so check the wire gauge for each model you choose.
- Label both ends. Mark the room and the speaker position at the cable end and at the amplifier or rack.
- Choose the equipment room. Amplifiers and sources need ventilation and a network point. A long cable run to a hidden rack is easier to add now.
- Write down the ceiling build-up. Board thickness, void depth and what runs through it. Send this to us with the room size and we can say which models fit.
- Leave access. Plan one removable panel or a service point close to any subwoofer.
None of this needs a final speaker choice. It needs only a cable to each position and a record of what is above and behind the surface.
What should you send us to get advice?
Send the room dimensions, the ceiling build-up, the wall material, the planned seating and the amplifier or rack position. With those five items we can narrow the list to models that physically fit, then talk about sound. Without them, the answer is generic.
Questions people ask
Can an in-wall subwoofer go in a brick wall?
The IW-SUB10 is designed for walls where the studs are 16 inches on centre. A brick or concrete wall is a different case and needs a different approach. Ask us with the wall details before you choose.
Which Earthquake ceiling speaker needs the least depth?
In the brochure, the ECS3.0 lists the shallowest mounting depth at 58.8 mm, followed by the ECS4.0 v2 at 75 mm. Both are small edgeless models, so check that their size suits the room.
Do I need to decide the amplifier now?
No. You need the cable to each position now. The amplifier can follow once the room and speakers are final, and we can help with the match.
Planning hidden speakers or a home theatre? See the Earthquake Sound range or send us your room details: talk to our team.
Sources checked on 7 November 2026
- Earthquake Sound, product brochure supplied to Morion, pages 5, 14, 16 and 17, for cut-outs, mounting depths and the IW-SUB10 stud spacing.
- Morion Automation, Earthquake Sound, for the range and its categories.
Earthquake speakers that sit inside a wall or ceiling look simple on the shelf and are unforgiving on site. Each one needs a cut-out of a known size and a cavity of a known depth, and the cavity is only open once. This post lists the mounting figures from the Earthquake Sound brochure, how the in-wall subwoofer is meant to be fitted, and what to settle before the ceiling closes.
Why does hidden audio need planning earlier than most things?
A freestanding speaker can be moved if the room sounds wrong. A speaker in a wall or ceiling cannot, so its position, its depth and its cable all have to be right before the plaster or the false ceiling goes up. Cable is the cheap part, and it is the part people skip.
Three questions decide most of it: is there enough depth above the ceiling, where does the subwoofer go, and which amplifier will drive it. The brochure answers the first two in numbers. The third you should settle with us for your room.
How deep does an in-ceiling speaker need to be?
The brochure lists a cut-out and a mounting depth for each model. The mounting depth is the space the speaker needs behind the ceiling surface. A false ceiling of a few centimetres can take the smallest models and not the largest.
| Model | Type | Cut-out | Mounting depth |
|---|---|---|---|
| ECS3.0 | 3-inch edgeless ceiling speaker | 65 mm diameter | 58.8 mm |
| ECS4.0 v2 | 4-inch edgeless ceiling speaker | 99 mm diameter | 75 mm |
| IQ6D | 6.5-inch edgeless IQ ceiling speaker | 200 mm diameter | 95.5 mm |
| IQ8D | 8-inch edgeless IQ ceiling speaker | 240 mm diameter | 121 mm |
Figures are from the Earthquake Sound brochure, pages 16 and 17. The brochure lists other ceiling series with their own depths, so ask us for the one you are considering. Allow for more than the listed depth in a real ceiling, because the speaker is not the only thing above the board: pipes, cable trays, air-conditioning ducts and joists all take room.
What about the LCR speakers in the wall?
LCR means left, centre and right: the three front speakers of a home theatre. The brochure lists the Cinénova Clarté LCR speakers both in-wall and on-wall. The IW-C5 in-wall model lists a mounting depth of 100 mm and a cut-out of 156 mm by 1,017 mm, which makes it a long, low opening. On-wall versions need no cut-out and no depth, but they do stand out from the surface, so decide this with your interior designer before the wall is finished.
An in-wall LCR also has to sit where the screen will be. Settle the screen size and position first, then the speaker openings. The reverse order tends to leave a centre speaker behind the picture.
How is the in-wall subwoofer fitted?
The IW-SUB10 is the in-wall subwoofer in the brochure. Per the brochure it has a 10-inch active driver and a 10-inch passive radiator, a paintable grille, and it is designed for walls where the studs are 16 inches on centre, which is about 406 mm. It is listed as 711 mm tall, 473 mm wide and 95 mm deep, with a cut-out of 610 mm by 349 mm. Its maximum power handling is 400 W at 4 ohms.
That list tells you what to check on site. The wall needs studs at a spacing the subwoofer was designed for, enough depth for the 95 mm body, and a clear opening of the cut-out size. Many Indian homes have brick or concrete walls, where the arrangement does not apply and the fitting is different. If your wall is masonry, ask us before you choose a model. We would rather say so now than after the wall is built.
The brochure names an Earthquake XJ300ST amplifier as the recommended partner for the IW-SUB10. We suggest confirming the amplifier for your room with us rather than choosing one by wattage alone, since the right match depends on the speaker, the room and the rest of the system.
Smaller in-ceiling and in-wall subwoofers are also listed: the SUB-6 and SUB-8, each with a built-in crossover and a round or square grille. They need cut-outs of about 197 mm and 240 mm and depths of 86 mm and 92 mm. They are an option where there is no room for the larger unit.
What should you do before the ceiling closes?
- Fix the room layout. Where the seating, the screen and the doors are decides every speaker position.
- Pull the speaker cable now. Run a cable to each planned speaker position and to the subwoofer. The brochure recommends 12 gauge for its edgeless LCR line, so check the wire gauge for each model you choose.
- Label both ends. Mark the room and the speaker position at the cable end and at the amplifier or rack.
- Choose the equipment room. Amplifiers and sources need ventilation and a network point. A long cable run to a hidden rack is easier to add now.
- Write down the ceiling build-up. Board thickness, void depth and what runs through it. Send this to us with the room size and we can say which models fit.
- Leave access. Plan one removable panel or a service point close to any subwoofer.
None of this needs a final speaker choice. It needs only a cable to each position and a record of what is above and behind the surface.
What should you send us to get advice?
Send the room dimensions, the ceiling build-up, the wall material, the planned seating and the amplifier or rack position. With those five items we can narrow the list to models that physically fit, then talk about sound. Without them, the answer is generic.
Questions people ask
Can an in-wall subwoofer go in a brick wall?
The IW-SUB10 is designed for walls where the studs are 16 inches on centre. A brick or concrete wall is a different case and needs a different approach. Ask us with the wall details before you choose.
Which Earthquake ceiling speaker needs the least depth?
In the brochure, the ECS3.0 lists the shallowest mounting depth at 58.8 mm, followed by the ECS4.0 v2 at 75 mm. Both are small edgeless models, so check that their size suits the room.
Do I need to decide the amplifier now?
No. You need the cable to each position now. The amplifier can follow once the room and speakers are final, and we can help with the match.
Planning hidden speakers or a home theatre? See the Earthquake Sound range or send us your room details: talk to our team.
Sources checked on 7 November 2026
- Earthquake Sound, product brochure supplied to Morion, pages 5, 14, 16 and 17, for cut-outs, mounting depths and the IW-SUB10 stud spacing.
- Morion Automation, Earthquake Sound, for the range and its categories.
