MartinLogan Depth 215
Free Shipping On All Orders, No Minimums.
We offer free 2-day shipping on most products within the continental US.
Weekdays - Orders placed by 2pm EST ship same day. Orders placed after 2pm EST will ship the following business day.
Weekends - Orders placed on Saturday and Sunday will ship Monday.
Orders requiring motor freight delivery may take more than two business days. Once your order has shipped, you'll receive a shipping confirmation email with a tracking number for easy tracking.
Orders for Open Box products ship with free ground shipping within the continental United States.
Orders that contain items that are currently backordered, special order, or out of stock will ship complete once all items are in-stock unless otherwise requested.
If you need it faster, you will have the option of choosing a quicker shipping option when you checkout on the website.
At this time, we do not ship internationally and orders to Hawaii and Alaska may incur an additional shipping charge. Please contact us at 888.899.8776 or email support@audioadvice.com to confirm.
Rerouting and Address Changes
We cannot make ANY address changes once an order is placed. If you are unable to accept delivery of your package as ordered, we will need to cancel your order, return the package to sender and have you replace your order through our website.
Keep the Box
We suggest you keep the shipping box or boxes for at least 30 days. It is actually a great idea to keep boxes for audio products for the life of the product. Having the box and all packing will increase the trade-in value should you decide to move up and they are handy to have should you ever need to send the unit in for repair.
How To Receive a Motor Freight Order
The trucking company will contact you to schedule a convenient time to deliver the order. Please note that you must be present for delivery.
Visually inspect the box to make sure you see no signs of damage. If you notice any damage at all, take some pictures with your phone and make a note of them on the delivery receipt the driver will ask you to sign. If it is obvious that the product is damaged, please refuse the order and contact us immediately at 888.899.8776 or email support@audioadvice.com.
Open your box as soon as possible and inspect the product for damage and contact us if you find anything wrong.
FedEx Freight Service Comparison
| Feature / Service | Scheduled Curbside Delivery | White Glove Delivery |
|---|---|---|
| Scheduled delivery appointment | ✔ | ✔ |
| Delivery location | Ground level only (garage, front door, loading dock) | Room of choice, any floor |
| Delivery team | 1 person | 2 people |
| Placement inside home/business | ✘ | ✔ |
| Upstairs / downstairs delivery | ✘ | ✔ |
| Unpacking | ✘ | ✔ (upon request) |
| Packaging removal | ✘ | ✔ (upon request) |
| Assembly / installation | ✘ | ✘ |
| Old item removal | ✘ | ✘ |
At Audio Advice, we pride ourselves on customer satisfaction. We'll bend over backward to make sure you're 100% satisfied and we won't accept anything less. We offer 30-day hassle-free returns and personalized service from real, live people.
If an item doesn't meet your expectations, you may return or exchange it in its original condition and packaging within 30 days for a full refund, minus shipping fees. Items shipped back in like new condition through standard shipping carriers will incur a minimum $15 return shipping fee. If the items were initially shipped through free scheduled delivery via motor freight (commonly referred to as LTL), returning them will result in return shipping fees starting at $150. These items include but are not limited to, oversized items such as TVs, certain subwoofers, floorstanding speakers, furniture, and most items weighing over 75 pounds. Return fees will also apply for exchanges. We want to treat your system as if it is our own and want you to be completely satisfied with your purchase.
Please see the instructions below. We only accept returns for any product purchased directly from our website. If merchandise is not returned in its original condition or is missing packaging, manuals, accessories or other parts, or the resale value of the product has been impaired, a partial refund will be given and calculated on a case-by-case basis.
Non-Returnable Items
The following items cannot be returned or cancelled:
- Special/Custom Order Items
- Gift Cards
- In-ear headphones cannot be returned once the packaging has been opened due to personal hygiene reasons. Please contact our customer care team if you'd like help choosing.
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Turntables With a Broken Stylus: All turntables ship out with the stylus intact. If you return a turntable or phono cartridge with a broken or missing stylus you will be subject to a return fee. Please be careful when setting up your turntable and contact us with any questions.
Is It Easy To Return An Item?
Yes, simply give us a call at 888.899.8776 or you can email our support team at support@audioadvice.com. Many times our team of experts can help figure out why the product might not be working like you expected and get things fixed over the phone, so don’t be surprised if we ask a few questions, we love troubleshooting!
If our tech help can not make you happy, we will email over a return shipping label with a Return Number.
Hopefully, you saved all of the original item’s box and packaging inserts. You will want to pack back up your return or exchange in the same way it came out of the original box. Once you have everything packaged correctly, tape the box on the top and bottom to assure it stays together. If Audio Advice shipped the item to you inside a second box, it's a good idea to use that same extra box to help prevent damage on its way back to us. To avoid it accidentally coming back to you, use a magic marker to cross out the old shipping label or just tear it off.
The return shipping label we send you will have our address on it, just make sure you take the box to the right shipper (UPS, FEDEX, or USPS) as per the label.
If you are close to one of our stores, please let us know if it is more convenient for you to return it to us directly. You will still need to get a return number by contacting us and shipping and/or restocking charges may apply.
When Will I See My Refund?
It usually takes around 7-14 days for the refund to show up on the payment method you used. We do inspect all returns for damage and accuracy of the item inside the box before issuing a refund. Some items may be subject to shipping and restocking fees.
Can I Exchange My Purchase For Something Different?
Sometimes those big speakers just don’t fit in the room or you might have bought a small subwoofer and later found out you’d love a bigger one. If you would like to make an exchange within 30 days of receiving your item, just give us a call at 888.899.8776 or email support@audioadvice.com and we will help work out the details. Additional shipping charges and return costs may apply.
How Do I Cancel An Order?
If the item has already shipped out or is a special order item, it is not possible to cancel the order. Please contact us at 888.899.8776 or email support@audioadvice.com to start the return process.
What If I Find Shipping Damage?
We need to know right away about any shipping damage. Please contact us at 888.899.8776 or email support@audioadvice.com within 48 hours of your delivery so we can get the ball rolling on making things right. It’s very helpful to take some pictures and email them to us if possible.
Can I Refuse A Shipment?
You can, but unless the item is damaged, shipping and restocking fees will be deducted from your refund. If your item arrives damaged and you are lucky enough to be there, snap some quick pics and refuse the order. Then contact us so we can get a replacement on the way.
What Happens If My Order Is Defective?
This is actually pretty rare, most consumer electronics work fine out of the box 99.9% of the time. We’d like for you to contact us first by calling 888.899.8776 or email support@audioadvice.com so we can help get to the bottom of things. If your item is indeed defective during the first 30 days, we can usually exchange it for a new, replacement unit.
What About Service After 30 Days?
Audio Advice has a great relationship with all of our brands and can help you with warranty service by the brand after our 30-day guarantee period. Even after the warranty expires, we can arrange for service by the brand on products purchased from Audio Advice. Just call 888.899.8776 or email support@audioadvice.com.
How Do You Determine A Restocking Fee?
You may not believe it, but sometimes we receive items back that were put in the box with zero packaging and are completely destroyed or are missing many of the pieces that came with the item. We also track serial numbers and will get back different serial numbers. We’ve even seen different items than what we shipped out be returned. However, it’s very important to package your return properly so that nothing goes missing or gets damaged in shipping, which will result in a restocking fee or even no refund at all. If a product is opened and the market value of the product is reduced, then a restocking fee may be applied to the cost of restocking and the reduced market value of the product. The bottom line is if you treat us fairly, we will do the same.
Audio Advice strives to provide industry-leading support and service while also maintaining the lowest prices available on products for our customers. We work hard with our vendors to bring our customers the best products at each price point. As a part of that process, we work with our vendors to provide the lowest pricing in our stores and on our website.
Our prices should always be the same as any other authorized dealer, including big-box retailers and major online retailers.
If you believe that you have found a lower advertised price from a legitimate authorized seller, call us and let us know so we can make sure we can correct any inadvertent error on our side. As a matter of policy, we update our prices automatically if a vendor changes its authorized pricing policies, so we generally have the best prices all the time. Increasingly, there are knock-off copies of products online, usually sold by non-authorized dealers.
Please be sure that the item meets the following conditions:
- The item is brand new, in stock, and available for purchase
- The item has the identical model number, color, etc as the item on our site.
- The seller is an authorized dealer
As always, our goal is to provide a terrific customer experience, including industry low prices. We appreciate your support.
Overview
High-Resolution Subwoofer System
Depth Series subwoofers are designed to blend uncompromising low frequency performance with timeless, luxury design. Starting with a massively overbuilt cabinet, expertly sculpted to achieve a sleek and elegant look, every aspect of the Depth Series has been carefully crafted into a perfect fusion of both form and function.
The force-canceling dual woofer layout all but eliminates performance-robbing cabinet resonances, allowing the custom 12" (Depth 212) or 15" (Depth 215) Carbon Aerocore woofers to deliver pure bass energy without coloration. The system is backed by high-power, ultra-precise amplification controlled by a class leading 64-bit Vojtko DSP engine. All of this helps Depth achieve massive dynamic output, low distortion, and exceptional musicality.
It’s not only about what you can see and hear though, it’s also about what you can’t. Take the amplifier for example, which is completely concealed within the sleek back of the cabinet. Not only does it look clean, but it also allowed MartinLogan's engineers to design a convection cooling system to help keep the amplifier running at optimal levels. The aluminum trim pieces on the back edge of the sub not only add a touch of design flair, but they are both functional heatsinks and air intakes for the cooling system. Depth subwoofers prove that high performance and high style do not have to be mutually exclusive.
Power and Precision Delivered with Elegance
Because of the high levels of force necessary to produce bass frequencies, the subwoofer cabinet itself can vibrate or resonate, which can blur or color the sound. This is why speaker cabinets must be strong and rigid to counteract these forces for the best sound quality. Depth subwoofers take this concept to the next level by featuring MartinLogan's signature distortion-reducing BalancedForce woofer topology. The dual active 12" woofers on Depth 212 and dual active 15" woofers on Depth 215 are arranged so they operate in exact opposition from one another. The equal and opposite forces of the woofers effectively cancel out the energy that would typically be transferred into the cabinet. This design cuts out the blur, smearing, and distortion caused by cabinet resonance, leaving only pure, articulate bass energy. Not only does this sound noticeably better, but the lower distortion means Depth subwoofers are easier to listen to at all volumes. With such low distortion, Depth subwoofers are an ideal choice to pair with reference grade loudspeakers for the ultimate audio experience.
Carbon Aerocore Woofers
To achieve such detailed and articulate bass, MartinLogan's engineers designed a very special cone material. To prevent unwanted cone resonances and ringing, the tri-layer Carbon Aerocore woofers on Depth series uses layers of dissimilar materials to dampen and strengthen the cone for maximum fidelity. The outer layer is made of ultra-rigid carbon fiber, known for its extreme strength and light weight. The middle layer is a PMI foam core, an extremely lightweight cross-linked rigid structural foam material chosen for its impressive strength and incredible light weight. The back layer is composed of fiberglass, further dampening the cone without adding appreciable weight. The result is a cone that is both incredibly strong and stable, yet extremely lightweight and articulate. Able to play the most nuanced passages with precision and authority. Afterall, what good is power without control? To further enhance both performance and reliability, Depth’s Carbon Aerocore woofers are triple vented with under spider frame venting, vented voice coils, and vented pole pieces. These high performance woofers also use dual copper shorting rings for vanishingly low distortion.
OurUp To 4,400W Of Reference Grade Amplification
Depth 212 features a 2,200W Dynamic Peak (1,100W RMS) Class-D amplifier while Depth 215 features dual amplifiers for a staggering total of 4,400W Dynamic Peak (2,200W RMS) power. Don’t make assumptions based on power, Depth subwoofers are not only about playing loud. These massive power reserves not only allow Depth subwoofers to achieve high output capability with low distortion, but also the precise delivery of bass, exactly when you need it, regardless of the volume level. Power and precision delivered with elegance, this is the MartinLogan way.
Convection Cooled Concealed Amplifier Design
The back of a subwoofer is rarely seen, and for good reason, it’s typically the least attractive side since the amplifier and connections are usually located here. With Depth, MartinLogan wanted every side to be “the good side” and chased the wild notion of treating the back of the sub as an opportunity to improve both performance and aesthetics. MartinLogan's team came up with an elegant solution, a completely concealed amplifier design that uses convection cooling to keep things running optimally. The decorative trim pieces on the back edges of the cabinet are actually extruded aluminum heatsinks. These intake cool air from the room while exhausting the hot air generated by the amplifier, keeping the amp operating at optimal levels even during the most demanding content. At this point you may be wondering where you plug in your subwoofer if there are no connections on the back? In another fusion of form and function, the inputs are located on the rear bottom edge of the subwoofer, tucked away inside an extruded aluminum trim piece. This helps keep your cable management nice and neat by placing the cables closer to the floor for a tidy look. They made sure to provide ample clearance to accommodate a variety of power and signal cable options.
Concealed Touch Control Interface
While the MartinLogan Control app offers the most convenient way to adjust your subwoofer, Depth subwoofers also feature a concealed Touch Control Interface (TCI). When not in use, the TCI acts as the backlight for the signature MartinLogan “zig” on the front control cover. The backlit logo can be set to a variety of user selectable colors or disabled entirely for a more stealth look. If you wish to access the subwoofer settings without using the app, simply press underneath the “zig” and the front cover is easily removed to reveal the TCI. The TCI displays all the available settings and options on its LED screen, and uses 6 contextually backlit touch points to interact with the available on-screen options.
Details & Specs
| Model | Depth 215 |
|---|---|
| Application | Subwoofer |
| Frequency Response | 18–120 Hz ±3 dB (anechoic via LFE input) |
| Low Frequency Transducer | Dual active 15" cast-aluminum basket, high excursion, Carbon Aerocore cone woofers in a BalancedForce configuration with under spider, voice coil, and pole piece venting, plus dual copper shorting rings |
| Amplifier | Dual reference grade Class-D amplifiers: 4,400W Dynamic Peak (2,200W RMS) |
| Digital Signal Processing | Ultra high-resolution 500MHz Vojtko DSP engine with 64-bit processing |
| Cabinet | Extensively braced and reinforced variable thickness (1–3") cabinet |
| Inputs |
Line level: Left, Right, and LFE XLR: Left, Right or LFE (Right In) Speaker level: Left and Right (requires banana plugs) |
| Output | RCA Sub Out (outputs the sum of all connected inputs) |
| Wireless Input | Integrated wireless receiver, wireless transmitter included |
| Controls (via Bluetooth) |
Level: -40 to 12dB (Min–Max) Low-pass filter (frequency): 35–120Hz (1° increments) Low-pass filter (order): Bypass, Third, Fourth Phase: 0–180° (1° increments) Phase (polarity): Normal, Inverted Preset listening modes: Movie, Music, Night 20–30Hz level: ±10dB Anthem Room Correction (ARC Genesis): On, Off Tone sweep (120–20Hz): On, Off, Pause (frequency) |
| Controls (Touch Control Interface) |
Level adjustment Tone sweep Low-pass filter Phase/Polarity Listening mode 20–30Hz level ARC On/Off Wireless On/Off Passcode lock Logo color Information Factory reset Language selection Owner’s manual QR code Control app QR code |
| Feet | Integrated anti-vibration feet (carpet spikes included) |
| Power Draw |
Standby (wireless disabled): 0.5W Standby (wireless enabled): <2W *Transmitter and subwoofer combined |
| Dimensions (H x W x D) | 22.5" x 22.8" x 23.4" (57.2cm x 58cm x 59.5cm)* |
| Weight | 173 lbs (78.5kg) |
| Finish | Gloss Black |
| Notes | *Product height is without carpet spikes but includes the feet. Specifications are subject to change without notice. |
