JBL GTO628 6.5-Inch 2-Way Loudspeaker

JBL GTO628 6.5-Inch 2-Way Loudspeaker Review

JBL GTO628 6.5-Inch 2-Way Loudspeaker Feature

• 6-1/2- Inch two-way loudspeaker
• Plus One woofer cone with rubber surround
• Adjustable one-inch mylar-titanium tweeter with level control
• 180 Watts peak power handling; 2 ohm impedance
• 2-1/16- Inch mounting depth

This speaker includes some of JBL's top tech. It has a cone with more surface area than that found on competing models of the same size. Its My-Ti (Mylar/titanium composite) tweeters offer increased power handling, reduced distortion and increased efficiency. Its Unipoint rotating tweeter pod allows the tweeter to rotate 350 degrees so it can be directed for optimal imaging. The speaker also includes a tweeter-level control for easy adjustment of tweeter output, even after installation. Finally, it incorporates the Intermount III proprietary mounting system, which facilitates easy installation into all four 6-inch-hole variations.

The GTO tweeter is both strong and light weight while being adjustable

Why JBL Sound?

For more than 60 years, JBL products have been bringing home the impact and excitement of the world's best recording studios, movie theaters and concert venues. Now, JBL engineers are creating these world-class listening experiences in the car. Thanks to advanced technology developed in the professional arena, JBL mobile products simply sound better than the competition. High output, superb bass response, long life and smooth response are all things you can expect from any speaker that wears the JBL badge. So join enthusiasts who know audio, and don't settle for anything but JBL in your vehicle. Bring the sound of the show on the road.

Listen Loud
The last thing you want to worry about is the quality of your speakers. We understand. All new JBL mobile products have to go through nearly 500 hours of environmental testing. We put them under temperatures fluctuating between -35° C and +90° C with up to 90 percent air humidity for more than 200 hours. We expose speakers to UV light for more than 150 hours to simulate a mounting location on a car's rear deck. We even shake things up, as all of our new mobile audio products have to pass extensive vibration testing before we release them for production. We've made unparalleled efforts to ensure the best possible quality so that you can listen long and loud when you crank up a JBL speaker.

Edge-Driven, Mylar-Titanium Tweeter
The JBL GTO628 uses a 1-inch (25-millimeter) Mylar-titanium (My-Ti) tweeter with a large voice coil--much like a voice coil found in high-end home audio speakers. The benefit of the Mylar and titanium blend in making a tweeter is that it is lightweight and has remarkable strength. At the same time, its large voice coil increases power handling and reduces distortion at high output levels. This tweeter design also helps create more seamless integration with the woofer. The GTO628's tweeter is even adjustable, so you can modify it to optimize the sound. The result? True, high-end, audiophile-quality performance.

UniPivot Tweeter Pod
We all know that our ears are not down by our ankles. Unfortunately, most factory-installed speakers are usually down somewhere in the door, far from our ears. This placement can really affect the imaging of your music, making it sound unnatural. To ensure proper imaging, the GTO628's utilize a patented rotating tweeter. So even if the speaker is mounted down low, the soundstage can be brought up and optimized for the listening location.

Built-in Crossover Networks
Typical entry level mobile loudspeakers use low performance bass blockers to keep bass from going to the tweeter. Well, the JBL GTO628 is not your typical entry-level loudspeaker. By using a built-in crossover network with advanced high and low pass filters, the GTO628 creates a smooth transition between the woofer and tweeter. The result? Midrange vocals that sound so natural and lifelike you think you the artist were right in the car with you.

The Plus One woofer cone increases bass output and efficiency

Look for the True 4 ohm logo for the best real world performance

Intermount III makes installation into any factory location simple Click to Enlarge

Bass that Booms

Plus One Cone
The JBL GTO628 uses a 6-1/2-inch (160-millimeter) woofer with the patent-pending JBL Plus One cone technology. Plus One technology gives the GTO628 more cone surface than competing models of the same size--up to 30 percent more in many cases. With a larger cone area, the GTO628 speakers provide higher efficiency and better bass response. Add a low-Q woofer design for higher bass output from the typical mounting location and 180-watt peak power handling, and the GTO628 will really get your car booming.

Powerful Performance

True 4-Ohm Topology
Low-impedance speaker voice coils extract more power from your amp for more powerful performance than high-impedance coils do. JBL GTO628 speakers use a lower-impedance voice coil than a typical 4-ohm speaker to extract the most power possible from all amplifiers engineered to drive loads of 4 ohms or less. And the GTO628's are compatible with both aftermarket head units and factory-installed systems. Since many factory-installed systems incorporate 2-ohm speakers and include amplifiers designed to drive 2-ohm loads, replacing those reduced-impedance speakers with a typical 4-ohm model will reduce the power output from the amplifier. For the most powerful performance, the GTO628's make the best use of any amplifier by providing an optimum 2-ohm load.

An Easy Install

Intermount III (Patent Number 6,505,705) Mounting System
Doing it yourself? Installing GTO628 speakers in nearly any factory-built location is a breeze. Designed as replacements for factory-installed OEM speakers, they easily install into nearly any factory-built 6-1/2-inch location without requiring any special tools or modifications. To make installation even easier, the GTO628s use JBL's patented Intermount III mounting system. Depending on the vehicle, the factory-built 6-1/2-inch location can actually vary in size from 6 inches all the way up to 6-3/4 inches, thanks to the GTO628's included installation rings. Even if you are upgrading an older set of aftermarket speakers, the GTO628 makes replacing them easy.

And with such easy installation, you'll be listening to your new JBL speakers in no time at all.

The JBL GTO628s deliver high output, superb bass response, long life and smooth response.

Highlights

• Great JBL Sound Quality
• UniPivot Tweeter Pod for smooth highs and great imaging
• Plus One woofer cones for the high output and deep bass
• True 4-Ohm design pulls the most power out of your system
• Easy to install

What's in the Box
One pair of JBL GTO628 2-way loudspeakers, one set of installation hardware, one set of Intermount III rings

JBL 6-1/2" 2-Way Loudspeaker

Polk Audio DB651 6.5-Inch Coaxial Speakers

Polk Audio DB651 6.5-Inch Coaxial Speakers Review

Polk Audio DB651 6.5-Inch Coaxial Speakers Feature

• 6.5-inch high-performance marine-certified coaxial speakers, perfect for boats of all types
• 180 Watts power handling with 4-ohm impedance
• 0.75-inch liquid-cooled silk-polymer composite dome tweeter
• Polymer/Mica composite cone with butyl rubber surround for big sound and durability
• Swivel-mount tweeter allows precise aiming of sound
• Swivel-mount tweeter
• Polymer/Mica composite cone with butyl rubber surround
• 6.5-inch high-performance marine-certified coaxial speakers

Turn up your vehicle's audio performance with the db651, a 6-1/2-inch coax speaker designed to drop into a variety of applications in no time at all. Advanced materials reduce component weight while offering rock solid reliability, advanced looks and ultra high performance. Borrowing technology from Polk Audio's flagship SR Series, the db Series offers exceptional value for the price.

Turn up your vehicle's audio performance with the db651. Click to enlarge.

Durable Butyl Rubber Surround won't fall apart under the stress of extreme temperatures, sunlight or time, for years of great Polk sound.

Swivel Mount Tweeter allows precise aiming of sound.

db651 Features

• The db651 come with 6-3/4 inch adaptor rings for easy fit in VWs, Audis, BWMs and other European cars.
• Dynamic Balance Driver Technology for pure, distortion free sound.
• Polymer/Mica Composite Cones are stiff yet lightweight for big sound and little distortion.
• Klippel Optimized Components for consistent, distortion-free sound.
• Marine Certified means the db651 is built tough to withstand the harshest environments on the water.
• Low-mass 2-Layer Kapton Voice Coil Kapton has a high melting temperature, ensuring reliability and high power handling.
• Swivel Mount Tweeter allows precise aiming of sound.
• Wheel-inspired style combines with rugged durability in the db grille.

Polk Audio's db Series

Polk Audio's entire db line of coaxial and component speakers has been redesigned and re-engineered with superior looks and even better sound. Polk has added three new sizes to cover a broader range of vehicle applications. And they've done all that at prices that make high performance affordable to everyone! The db Series works well in OEM factory systems, as well as with high-powered aftermarket head units and component power amps. The db Series delivers classic Polk Audio performance and durability like never before.

This is how you turn up the style.
The look is about more than performance. It's about making every detail count, from the wiring harness under the hood to the fit and finish of your loudspeaker installs. Even before you fire them up, the db Series delivers. ABS wheel-inspired grilles make a muscular statement about your entire audio system and say you're ready to unleash some real sound. Hidden wire channels give your system a clean, professional look. Now if you'd prefer to be more subtle about your audio system (although why would you?), db makes a comfortable stealth installation and will mount easily behind factory grilles.

The db Series fits. Yes, it's just that simple.
The last thing Polk wants is to sell you a great speaker that doesn't fit. Our new multi-hole mounting pattern and shallow-depth magnet design have created our highest vehicle application ratio for easy drop-in installations in just about any car on the road (and probably some that should have been taken off the road years ago). Tweeters in the component models can be flush & surface-swivel mounted using the supplied hardware. With db, we've made sure you have maximum install flexibility.

High Efficiency Design
It means less amplifier power is needed for more audio output. Meaning better sound and more volume using less power. The bottom line is db Loudspeakers will definitely blow you and your friends away, whether they're driven by aftermarket head units or factory installed electronics.

Marine Certified
Marine Certified means your db loudspeakers will perform reliably on the water as well as they do on land. So Polk attacked every db speaker with a series of punishing real world and accelerated weathering lab tests to see if they could take what some pretty nasty marine and automotive environments could dish out. Polk exposed dbs to hundreds of hours of salt fog, intense ultraviolet light and extreme temperatures from -40 degrees to 185 degrees F (-40 degrees to 85 degrees C). They performed as well after the tests as before (they didn't look so good). No wonder Correct Craft builds Polk Audio speakers into their award-winning Nautiques ski and wakeboarding boats, and Bullet uses Polk db speakers in their marine "tower" speaker enclosures.

What's in the Box

db651 Speakers (pair), Grilles, Installation Hardware, Owner's Manual The Polk Audio DB651 features 6-3/4 inch adaptor rings and 180 Watts power handling with 4-ohm impedance.