JBL GTR-7535

Am­pli­fier Re­view

Pasmag (Canada) - - Test Report -

You've read the re­views, an­dan fol­lowed ev­ery­one' ev­ery­one's ad­vice on up­grad­ing your sys­tem. You have new speak­ers front and back, and a well-de­signed sub­woofer sys­tem. Now you need power to drive ev­ery­thing, but space and bud­get are both look­ing tight. If you fit into that cat­e­gory, and par­tic­u­larly if you lis­ten to a lot of com­pressed au­dio, the folks at JBL have a solution for you. With the GTR-7535 am­pli­fier, you can drive five chan­nels of au­dio, im­prove your sys­tem's sound qual­ity, and al­low hands-free re­ceiv­ing of phone calls, all with one com­pact amp. Priced right around $549 in the U.S., the GTR-7535 is rated at 4x75 watts per chan­nel into four ohms, and the sub chan­nel is rated for up to 350 watts into two ohms. But this is an am­pli­fier that brings a lot more than just power to the ta­ble.

The JBL GTR series of am­pli­fiers are built on rugged cast alu­minum chas­sis, de­signed to be easy to in­stall and fit in tight spa­ces. Gen­er­ously-sized power and speaker con­nec­tions are found along the length of one side of the amp, and the sig­nal in­put and ad­just­ment con­trols are lo­cated on the op­po­site side. There are cross­over con­trols for front rear and sub chan­nels, with the front and rears hav­ing ad­justa­bil­ity from 32 to 320 Hz in high- or low-pass con­fig­u­ra­tions. The sub­woofer chan­nel has the same fre­quency range in low­pass. The sig­nal for the sub­woofer in­put can be de­liv­ered separately, which is handy if you have a sub­level con­trol on your source unit, or it can be de­rived in­ter­nally from the main four-chan­nel in­puts. A 0/180-de­gree phase switch is also in­cluded for the sub chan­nel, as well as an ad­justable bass boost with up to 9 dB of boost avail­able.

If you plan to drive the am­pli­fier with speaker-level in­put sig­nals, there are handy adapters in­cluded. Sim­ply con­nect the speaker wires to these volt­age di­vid­ing adap­tors and plug them into the ap­pro­pri­ate RCA in­put, then se­lect the high­level po­si­tion on the amp's gain range switch.

What makes the GTR-7535 quite dif­fer­ent from other five-chan­nel am­pli­fiers, how­ever, is JBL's pro­pri­etary Clari-Fi DSP tech­nol­ogy. This cir­cuitry is specif­i­cally de­signed for peo­ple who lis­ten to com­pressed dig­i­tal mu­sic. The Clari-Fi is based on a pre­dic­tive al­go­rithm that re­stores au­dio con­tent that is lost in the com­pres­sion process. JBL claims that the Clari-Fi cir­cuitry re­stores the nat­u­ral warmth of vo­cals and ex­tends the high fre­quency band­width, restor­ing your mu­sic to its orig­i­nal qual­ity. You can learn more about Clar­ifi and hear a demo at Clar­i­fiSound.com.

Another fea­ture that sep­a­rates the GTR-7535 from most other am­pli­fiers is the re­mote-mounted con­trol panel with Blue­tooth. This in­cluded ac­ces­sory al­lows you to eas­ily stream au­dio from your smart­phone or other Blue­tooth de­vice di­rectly to the am­pli­fier. You can even re­ceive phone calls through the au­dio sys­tem sim­ply by press­ing a but­ton on the con­trol panel. If your car is al­ready equipped with some sort of ADAS (Ad­vanced Driver As­sis­tance Sys­tem), the GTR am­pli­fier can in­form you with safety and nav­i­ga­tion prompts via Blue­tooth. A switch on the am­pli­fier al­lows you to se­lect which speaker is used for ADAS alerts. When an ADAS sys­tem is con­nected to the am­pli­fier, the amp will au­to­mat­i­cally mute your mu­sic, broad­cast the ADAS mes­sage, and then re­turn to your tunes. And thanks to the unit's Party Mode, any­one in the car can con­nect via Blue­tooth and play road trip DJ! When in Party Mode, up to three de­vices can stream au­dio con­tent with­out a per­ma­nent Blue­tooth pair­ing.

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