![]() At 1/3 power levels, the amplifier efficiency dropped to 25%. Current draw varied between 59 to 76 amps of current with efficiencies ranging from 49% to 60%. The efficiency is on par with what you might expect from a class A/B amplifier. That puts the total power of the amplifier well over the rated claims with nearly 650 watts of total system power. With all channels driven, the amplifier produced an impressive 72.8 watts x 6 into 4 ohms per channel, 107.7 watts x 6 into 2 ohms per channel and 215.5 watts x 3 into 4 ohms bridged. This is where the amplifier really shines. The owner’s manual is also available for download. It even documents the frequencies for each crossover detent.ĭetailed information is also available on JL Audio’s Web site, The site is easy to navigate and provided excellent information about the e6450. The manual goes into extra detail on adjusting the amplifier settings to obtain maximum performance. The manual for the e6450 is straightforward and easy to understand. As an added bonus, professionally installing the e6450 increases the factory warranty from 90 days to two years. Due to the high power capability of the amplifier, I would recommend having it installed by an authorized dealer. Once I folded over the wire, it worked just fine.įor an amplifier in this price range, the connections and adjustments felt extremely solid. Special care needs to be taken when using smaller gauge wire — I noticed it was possible to completely tighten the allen set screws without making a solid connection with 16-gauge wire. The speaker connections are optimized for 12-gauge speaker wire. Placed at the four corners of the amplifier, the mounting feet are solid. Installation of the JL Audio e6450 went smoothly. The bass boost is engaged via a switch and produces a 6 dB boost centered at 48 Hz, but with the addition of the optional RBC-1 remote bass control, the bass boost is fully variable from 0 to +12 dB from the front of the car — Ed.) (JL Audio adds that in addition to the typical EQ boost circuit, the e6450’s bass boost system simultaneously engages a 12 dB-per-octave high pass filter at 30 Hz. ![]() The guys at JL Audio have done something a little different. On most amplifiers, the bass boost is set to increase the output of the subwoofer in a particular frequency band. One of the more interesting features of the amplifier is the bass boost. ![]() There’s also a multi-pin connector that accepts four channels of high-level inputs. Channels 5 and 6 have the option of a discrete set of RCA inputs or take a summed output of the RCA used in channels 1 through 4. Channels 1 and 2 and 3 and 4 have their separate RCA inputs. The RCA and controls are located on the other side of the amplifier. The connectors are solid and well protected with plastic. At the power and speaker connections side of the amplifier, the e6450 is capable of accepting 4-gauge power cable and 8-gauge speaker wire. The JL Audio e6450 incorporates some well thought out features. Given the price of this amplifier, you’re getting a bargain in style. The amplifier is wrapped in a stylishly clean, clear aluminum heatsink with black powder coated, cast aluminum end caps. The overall fit and finish of the JL Audio e6450 amplifier is refined. (JL Audio reports that the bass boost becomes variable with the addition of the optional RBC-1 remote bass control ($29.95) - Ed.) Channels 5 and 6 are designed to be used for subwoofer channels, but can also be operated full-range or high-passed as well, and include a selectable bass boost of 6 dB at 48 Hz. ![]() ![]() Each pair of channels has a 12 dB-per-octave high-pass or low-pass crossover that’s fully variable from 50 Hz to 200Hz. The e6450 is an extremely flexible amplifier capable of running in five-, four-, or three-channel operation. All six channels are rated for the same power output. The JL Audio e6450 is a six-channel, class A/B amplifier. The JL Audio e6450 is a fine example of this multichannel configuration. Being in one chassis, this multichannel amplifier would be able to take the whole system power, balance the power, and save you money in the process. A multichannel amplifier with a common power supply could take power from the higher frequency speakers, when it’s not needed, and divert it to the subwoofer channels. In most car audio systems, amplifiers that drive subwoofers are taxed significantly harder than amplifiers driving midranges and tweeters. Multichannel amplifiers can have advantages. I found this article while surfin around.thought it would be nice to share it with fellow tuners. ![]()
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