Big Sub, Bigger Sound: Hands On with the OSD Audio TREVOCE 15 EQ DSP

The OSD Audio TREVOCE 15 EQ DSP is a little beast. There is plenty of competition at its price point, but there are few subs in this echelon that will deliver such clean, impactful bass as OSD’s “triple 15.” Let’s take a more in-depth look:

Integrator-Friendly Features

TREVOCE 15 sub incorporates a 15-inch woofer and a pair of passive radiatorsThe sub is driven by a digital amplifier capable of producing up to 1,500 wattsOSD Audio says the 15-inc sub is capable of playing down to 16Hz at +/-3dBThe TREVOCE 15 sub is supported by the companion DSP EQ app to fine tune frequency responseThe sub measures just 20 inches x 20 inches x 20 inchesMSRP is $999.99

Pros and Cons for Integrators

Pros:

The TREVOCE 15-inch sub is well designed to produce nice levels of bassConsidering it is a multi-driver 15-inch sub, it takes up a relatively small footprintThe DSP EQ app provides integrators with some installation flexibility to help the sub integrate into a range of rooms

Cons:

Even though the sub offers a relatively small footprint, it is still somewhat heavy, and ideally, two people should carry it into home spacesThe free version of the app is limited to the features it offers. The step-up version of the app can be downloaded for $4.99

A few years ago, OSD Audio launched its TREVOCE line of powered subwoofers. The company has recently introduced a new flagship model to the line: TREVOCE 15 EQ DSP subwoofer.

The new subwoofer was developed to meet the needs of larger home theater systems or homeowners that simply wanted more bass in their surround sound or 2.1 stereo systems.

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When the company went about designing the new 15-inch sub, it had several points to meet that included a high-output sub that didn’t take up a lot of floor space, and a sub that is attainable to a variety of users. 

I tested the subwoofer by itself and in combination with other subwoofers in my immersive audio system. 

TREVOCE 15 EQ DSP Subwoofer Setup

For a pretty reasonable amount of money, the new OSD Audio sub incorporates a host of features. The sub’s main active driver utilizes a graphite and paper composite cone and a pair of passive radiators that are made with a glass-fiber material. 

Powering the active 15-inch woofer is an amplifier that’s capable of producing up to 1,500 watts of peak power. OSD Audio emphasizes the “triple 15” provides users with 150-square inches of driver surface. 

According to the Calif.-based manufacturer, this subwoofer is capable of playing down to 16Hz at +/-3dB, and can play down to 14Hz at +/-10dB. 

On the sub’s rear panel are XLR, LFE and RCA inputs, along with speaker-level binding posts, phase, crossover and volume controls. To further support the capabilities of the TREVOCE 15 EQ DSP sub is augmented by the iWoofer app, which is available to iOS and Android users. 

The TREVOCE 15 EQ DSP Sub’s rear panel includes a choice of inputs and other controls to help integrators use the sub in a variety of home AV systems.

Arriving at my house during a blizzard, the sub in the box required the help of my 17-year-old daughter to get it into my house (I did not want to drag it through the snow). 

Once inside, I was able to unbox the sub and place it on an Auralex SubDude decoupling base that I use and I ran an RCA cable to its LFE input. From there I set the volume, and I downloaded the iWoofer app, which I would use later. 

Getting to the point I used the app, I ran some measurements to see how the sub fit into my 12 x 23-foot room, which took a few minutes and that was pretty much it. I wouldn’t say the TREVOCE 15 EQ DSP sub is plug-and-play—it could be installed as a “set and forget” sub—but the app is easy enough to use. 

Performance and Final Thoughts 

The numbers surrounding this product don’t tell the whole story. When I measured before and after, inserting the sub into my system, there was only a few dB difference. The key thing to remember is the dB scale is not a linear measurement scale, and the difference of a few dB can be quite dramatic.

Another thing that I should point out is that low frequencies in home environments can be very tricky, so the results in my room may be completely different than the results someone else may achieve in other home spaces. 

In my room, I was able to get the sub to play down to 25Hz with good, solid output. I will point out the sub did play down to 20Hz, but the difference in the output between 20 and 25Hz was noticeable.

The impactful bass was strong down to 25Hz. Adding my other subs didn’t increase the low-end extension, but it did add a couple dB of output to frequencies as low as 20Hz.

Using the companion iWoofer app, I was also able to see how the sub integrated into my home space. Seeing where I had a few areas of need, I was able to address a couple of “soft spots” or suckouts that were leveled out through equalization. 

I used the sub with streaming content such as Netflix’s Vikings: Vahalla. I also watched broadcast content, and disc-based content, including the Saving Private Ryan and Jurassic Park Blu-ray discs, and the UltraHD 4K disc version of Bohemian Rhapsody

On Vikings: Vahalla, the TREVOCE 15 EQ DSP added weight and immersiveness to scenes such as when the main characters sailed into Norway during a brutal storm on the Atlantic Ocean. Moving onto the Blu-ray discs, I used chapter two of Saving Private Ryan, the iconic invasion of Normandy recreation as my reference for seeing what the sub was capable of doing in a home theater environment.

Listening to the action, which was highlighted by bomb explosions and machine gun fire, I thought the sub did an excellent job of delivering deep, impactful low frequencies with good transients. The bass was not bloated and the sub responded well to the dynamics of this 20-minute movie sequence. 

Jurassic Park’s chapter 11 Tyrannosaurus Rex presents a bit of as different type of bass. It’s more about the depth and impact of the low frequencies in this movie, and the OSD sub stepped up to deliver this content with deep bass that was impactful.

Wanting to hear some Dolby Atmos and music, I played the recreation of Queen’s Live Aid performance, which is part of the 4K Bohemian Rhapsody disc’s bonus content. 

I think the mix in the Live Aid performance is awesome and it is highlighted by what I would call an extremely hot kick drum. Listening to Roger Taylor’s kick drum in this mix, it is extremely prominent and a real test for subwoofers.

The TREVOCE 15 EQ DSP was able to keep up with the transients of Taylor’s kick drum, as well as his floor toms, which are also quite prominent. 

Between the measured results and the subjective results I was able to produce through my listening sessions, I am really impressed with the new OSD sub.

I will say I didn’t find the app as refined or as easy to use as other EQ solutions, but after a few sessions of trying it, I think integrators will get the hang of it well enough. 

As I said earlier: For a pretty competitive price, the TREVOCE 15 EQ DSP offers homeowners a multi-driver, 1,500-watt solution that’s capable of maintaining its musicality while producing high levels of impactful bass. 

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