Install Highlight: 21 Bumpstreet

Install Highlight | WRITTEN BY LEWIS JACKSON | JULY 2018

As we have travelled across the nation attending shows with the DD Kong project, we have been privileged to see multitudes of DD Audio builds, ranging from simple “deck and four” setups utilizing our entry level coaxial midranges, to all out, no holds barred, seating-comfort-be-damned, dedicated bass only machines of war! Few of them have the right to belong to both groups, but there always exists an exception to the rule. If you have spent any time around the car audio community, I would bet you have heard the long-standing adage of “loud ain’t pretty”. Some good folks like Fabian Nichols, owner of this Silverado, have been able to prove that is not always the case!

Dotted throughout the interior and covering a significant portion of the exterior of this truck is every DD Audio sticker imaginable. The lavish adornment of DD Audio gear and goodies inside is very much the same way. The obvious standouts are the beastly pair of 9921 subwoofers dominating the cabin and the expertly trimmed M5 amplifiers that bookend them. As Fabian had just a smidge of free space above the wall, the obvious move was to stealthily sneak a set of EX4 coaxials up top to help fill the cab with enough vocals to rise to the challenge put forth by the low end transducers. Not to be outdone, the rest of the cab gets filled with that sweet DD Audio sound from a set of EX5.25 mids, a pair of DX6.5 mids, a complementary set of  VO-B1 tweeters, and even a set of DX6x9 mids in a custom center console, powered by our venerable C5d (discontinued – current model is C4.100 amplifier).

Affectionately referred to as “21 Bumpstreet”, this build shows that just because a build is loud, one shouldn’t simply forego the aesthetics. It also shows that having the beauty work finished shouldn’t always prevent one from improving on a build’s performance. It is possible to enhance your setup without sacrificing the sharp look you’ve already achieved. For those who saw this build at Scraping The Coast, you may notice the modifications to the port that are new, yet very neatly employed. Fabian beams that the setup now plays with authority down to the mid 20’s (frequency wise) and with all that available power, we bet it is something to witness! This will be a build to look for, potentially at a show near you this season!

 

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Out of the Oven and into the Frying Pan, DD Audio Heads to the Texas Heat Wave show in Austin

PRESS RELEASE Oklahoma City, OK, July 3, 2018 — Following the massively successful showing at Scrapin the Coast 2018 in Biloxi, MS late last month, DD Audio is now preparing to represent and demo at The Custom Sounds Texas Heat Wave show, July 20-22nd at the Travis County Expo Center in Austin, Texas. Here are some highlights from the Scrapin trip as well as some previews for Heat Wave.

Scrapin the Coast

Scrapin the Coast made good on it’s “Wildest Show on the Coast” promise this year for tens of thousands of visitors. As one team member noted, from a high vantage point the pavement disappeared under the sea of people that flowed from one amazing custom vehicle to the next. One such custom vehicle to get a great deal of attention at this show was none other than the beastly DDKong! It was made abundantly clear from the interest and the comments that word has spread since the uncaging at Slamology: “DDKong is the must see, must hear build” for DD fans. Speaking of fans, congratulations to Terry Wendell Vickers Jr. who won a Limited DDKong T-Shirt and Camillia Lecuyer who won a pair of DXB 1.1 Wood Earbuds for their participation in the #DDKONG social media photo contest.

The Custom Sound Texas Heat Wave

Texas Heat Wave is the demo team’s third show this year and the third stop on the DDKong Tour, but this “Custom Truck, Car, and Audio Event with incorporated Tattoo Expo” is promising to be the hottest show of the summer – and not just in Fahrenheit. Stunt shows, burnout and hydraulic contests, monster trucks, and much more make this a must visit for DD Audio. Of course, you don’t have to twist anyone’s arm to get the DD demo team to visit Austin. It goes without saying it’s great town known for its eclectic community of artists which makes it an ideal hub for customizers and audio enthusiasts in the southwest. These guys will gladly make the relatively short 400 mile drive down I-35 with DDKong to provide system demos all weekend. NOTE! Regardless of what DD team member Aaron Trimble tells visitors, demos do not cost 4 spareribs from Franklin’s BBQ, they are in fact FREE. Attendees, don’t forget to upload a photo or video on social media of the DDKONG, with the hashtag #DDKONG, for chances to win a limited edition DDKONG/SHTNONM shirt and DD Audio Lifestyle gear!

 

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Dealer Spotlight: AV Tech of Gillette, Wyoming

Shop Name: AV Tech
Shop Location: Gillette, Wyoming
Owner’s Name: Michael Kelly

DD: How long have you been in business?
Michael: Since June 15th, 2018.

DD: How did you get started in car audio?
Michael: I’ve always been after a better sound and more bass.

DD: What made you decide to do car audio for a living?
Michael: I have been in car audio most of my life. I met my right hand man Carlos Escalante in 2014 and hired him to work with me at another shop here in Gillette. We decided we would like a shop of our own to pursue our passion of good, clean sound and custom installations. A shop that isn’t just out to make a quick dollar. Carlos, my wife Lacey and I run the store and handle all of our installs.

DD: Does your shop specialize in anything specific?
Michael: Home audio and theatre, commercial audio video and of course car audio and video.  We pride ourselves in giving our clients the best quality and best install and not pushing them into something they don’t need. Together we offer everything from the complete blow your mind custom installs to basic budget minded installs — always keeping the client in mind and adding personal touches.

DD: How long have you been a DD Audio dealer?
Michael: I myself am new to DD and am totally blown away by the sound and quality of it.

DD: Where did you first hear about DD Audio, and why did you decide to become a DD Audio Dealer?
Michael: I was skeptical when Carlos first brought DD up to me. So, we brought in some entry and mid level products, and after the first few installs I was completely satisfied from an installer point and business standpoint. We haven’t built any big systems yet, but I am excited to see what the higher end product lines offer. The fact that DD Audio does so much to protect their lines is amazing in this time of online shopping. It shows me the love DD has for brick and mortar stores and that they’re also not just in it for a quick dollar.

We are just starting out here and are happy to begin our journey with DD on our side.

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If the Shoe Fits: Matching the Enclosure to the Vehicle

DD Audio Tech Talk | WRITTEN BY AARON TRIMBLE | Published May 25, 2017

Given the volume of questions that our technical department receives on this topic, we are again publishing this Tech Talk. If you’ve ever wondered how many 18s should you put in your 99 Camaro, this is a must read! SPOILER, the answer is ZERO. 

We’ve all seen the DD Box system right? Work within the 1.5:1 and 3:1 ratios for port size based on the cone area of the woofer then divide it by 16 to find your net airspace… No?  Well those of you who’re not DD Techies, check out last December’s Tech Talk, “Does Size Really Matter“, first! No, no it’s fine, we’ll wait.

Did you read it?  Ok, great!

So, we all know that the DD Box system is a great way to get a massive performance boost over the conventional prefabricated enclosure, but did you know that you can take it a step further? That’s right, we can manipulate the system to fine tune your enclosure for just the right kind of heart pounding bass you’re looking for.

Let’s say you’re a looking for a well rounded musical set-up. You know, something that can smash on the lows, but doesn’t sacrifice performance in the top end. The 808 sounds just as good as the kick drums. Well let’s take a look at your vehicle. A Ford Focus sedan and a Chevy Tahoe are very different vehicles, not just in the way they drive, how many people they can seat or their MPG, but also the way they sound, and I’m not talking about the exhaust either. What we’re concerned about is the vehicle’s internal acoustics. Generally speaking, larger and/or longer vehicles will have a lower natural resonance, whereas smaller vehicles, and in a lot of cases, older vehicles, will tend to have higher natural resonances. Knowing this we can plan ahead. If we’re in a smaller vehicle that reinforces high frequencies well we can tune our enclosure lower. Additionally, if we have the space to sacrifice, we can also use a larger cabinet for the sub to play in to really accentuate the low bass response in the vehicle that would otherwise be lacking. Conversely, if we’re in a larger vehicle, like the Tahoe, that naturally reinforces low frequency play we can get away with tuning the enclosure higher to give the vehicle a more well rounded performance. Smaller enclosures can also be helpful in this application to provide a more responsive top end play.

Output Analysis based on enclosure size

In the graph above you can see some very interesting things. This vehicle is a 1986 Isuzu Trooper with our favorite 3510 in it in a variety of differently sized enclosures. Each enclosure is tuned at 35 Hz. This vehicle is great at showing exactly how a vehicle with a high natural resonance can affect the performance of a system. Be mindful that this car is quite large, but it’s also fairly old and has a lot of windows and flat panels. This vehicle reinforces a lot of high frequencies, and its peak in this case is at 60 Hz. Because of this, enclosures that are larger than normal for their respective woofers and enclosures that are tuned lower will round out the performance of this vehicle without the use of equalization better than smaller or more highly tuned enclosures.

Output Analysis based on enclosure size

If we compare the Trooper to a 2016 Porsche Macan that we used in the December article, using the same test boxes, you can see there is less deviation in output across the sub range than there was in the Isuzu. The Porsche, being newer, with more well dampened interior panels, despite being smaller, has a much lower acoustic resonance. Since the Macan’s peak is closer to the 40 Hz range, if we used an enclosure tuned lower than our 35 Hz test enclosures it would yield a wider bandwidth.

Now, if rules of thumb aren’t your thing, and you’re looking to be more accurate in determining how your vehicle responds to bass, you can take it to the next level. You’ll need a sealed enclosure and a woofer that fits in that sealed enclosure. Additionally you’ll need your smart phone with a dB meter on it (or a Termlab if you’re lucky enough to have access to one) and a handful of test tones. Load the woofer into the sealed enclosure and place it in the future location of your new subwoofer set-up. From the driver’s seat with your dB meter handy, play the lowest frequency you want your new system to play at a moderate volume and measure how loud it is. Next go up a couple of frequencies and play the system again, be sure to measure the output again. It’s best to record these numbers as you continue your testing.  Continue testing and recording frequency outputs until you reach the top frequency that you’re interested in playing. It’s important that you don’t change any settings on the amp or the radio like volume or EQ while you’re testing. Once you’re done you can see where your vehicle’s peak frequency is at, and how your vehicle reacts with the given sub and enclosure set-up. The reason we use a sealed enclosure for this test is because the sealed enclosure is going to have a naturally flatter response than a ported or even a bandpass enclosure without knowing the environment that the sub is playing in. Once you have this data, you can more accurately determine how to approach your real enclosure.

So, when you get ready to build your next enclosure, keep your vehicle in mind. Is it large? How new is it? Does it have well dampened paneling or is it mostly card stock like a classic vehicle? All these things can affect the performance of your new sub system, and a well designed enclosure that matches the car can turn a system from something that is loud into something that’s loud, and sounds amazing.

 

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Product Spotlight: The Concealed Strength of the SS4b Multi-Channel Amplifier

The Ninja are discrete, versatile, precise and reliable. They crawl, soar, strike and vanish. Hidden in plain sight among DD Audio’s amplifier line-up is one such covert killer. Often overlooked, never overwrought, this sharp and powerful little shinobi has earned respect from all who employ its skills. For that reason, we have chosen the SS4b for this month’s product spotlight.

Loaded into the compact SS chassis, this amplifier is ideal for stealth installations. Its discrete class D circuitry delivers tremendous power without sacrificing fidelity or thermal load handling. The highly durable screw block terminals support clean and lasting connections. With individually selectable high pass and low pass crossovers, the SS4b effortlessly bends frequency bands to its will.

Subtle, versatile, powerful, exact, and unrelenting. The SS4b is your system’s shadow veiled assassin — channeling powerful and efficient blows that reverberate through the domain of its shogun.

SS4b full range class D amplifier

Features:
6.875″ x 11.81″ SS Chassis
350 Watts per Channel at 2-ohm stereo
Less than 1% THD+N
Heavy Duty Set Screw Blocks for Speaker and Power Terminals
Frequency Response from 10Hz-35kHz

Specs:
Test Voltage: 14.4
Channels: 4
Cont Wattage @ 4ohm: 250 x 4 / 700 x 2
Cont Wattage @ 2ohm: 350 x 4
Max Current Draw: 110 Amps
S/N Ratio: >105dB
Input Voltage Sensitivity: 8 – 0.2
Pass-Through Output: No
Remote Subwoofer Control: Yes
Power Wire Gauge In: 4
Speaker Wire Gauge Out: 10
Dimensions: 11.81in x 6.88in x 2.14in
Dimensions: 300mm x 175mm x 54.5mm
Shipping Weight 11 Lbs.

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