Appendix Gain Level Jumpers | JBL 260 instruction

DriveRackAppendix A

Appendix

A.9 Gain Level Jumpers

CAUTION: These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. Refer all servicing to qualified service personnel. Disconnect mains power before servicing.

The DriveRack 260 gives you the option of changing the input gain level settings. There are 3 hardware configurable gain settings. They are: +14 dBu, +22 dBu and +30 dBu. For these cases, use the following procedure to change the gain level settings. Please be advised however, that once the gain level has been changed from the factory settings, the output meters will no longer be calibrated correctly.

To change the gain level, move the jumpers to the pins that are marked with the desired gain setting.

1.First, make sure that the unit has been shut off and unplugged prior to opening the unit.

2.Ground yourself prior to opening the DriveRack chassis to prevent ESD damage.

3.Open the chassis by removing five screws on each side of the chassis and the top two center screws on the rear panel, as well as the top center allen screw located on the front panel

4.Locate the jumper block shown in the illustration below:

Ch1

	Ch1		Ch2	+14dBu
+14dBu		+14dBu		+22dBu
+22dBu		+22dBu		+30dBu
+22dBu		+22dBu
+30dBu		+30dBu

Input Jumpers

Ch2

+14dBu +22dBu +30dBu

Ch3

+14dBu +22dBu +30dBu

	Ch4		Ch5		Ch6
+14dBu		+14dBu		+14dBu
+22dBu		+22dBu		+22dBu
+30dBu		+30dBu		+30dBu

Output Jumpers

A.10 System Setup and Gain Structure

The DriveRack 260 offers a wide range of tools for sound system design and setup. These tools can make your system more efficient and better sounding, but to get the best possible sound it is important to use these tools properly. In the DriveRack 260 we have included a Wizard setup tool to help in system setup. If you use the Wizard to set up your DriveRack 260 it will automatically set the limiters for some amplifier selections. If your amplifiers are not available in the Wizard, you should choose the Custom setting. The following section explains how to maximize system gain and how to use the limiters to protect your amplifiers from clipping.

In traditional system design, the output of your console would be routed to a system EQ, a compressor, and a crossover with output level control. From the crossover, there may be additional filters that are employed to improve the response of your speakers. There may also be limiters set up to keep your amplifiers from going into clipping and protect your speakers from the hazards of a clipped signal. Your amplifiers play a vital role in system setup, because they are last item in the chain before your speakers and offer the greatest amount of gain (that is their job after all). If your amplifiers are incorrectly setup you will not be using your system to its fullest potential and could be harming your speakers.

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260 specifications

The JBL 260 is a powerful and versatile loudspeaker that embodies the brand's renowned commitment to audio excellence. Known for its striking design and rich sound quality, the JBL 260 caters to both audiophiles and casual listeners alike, ensuring an immersive listening experience in any environment.

One of the standout features of the JBL 260 is its high-efficiency design, which allows it to deliver exceptional sound performance even in larger spaces. The speaker is equipped with a robust 6.5-inch woofer that provides deep, resonant bass, while a 1-inch soft dome tweeter ensures clear and detailed high frequencies. This combination results in a balanced sound signature that captures the subtle nuances of various music genres.

The JBL 260 employs advanced technologies such as Harman's proprietary Polished Surface Com Acoustic Design, which minimizes cabinet vibrations and resonances. This technology contributes to the overall clarity of the audio output, allowing for a more natural soundstage. Additionally, the Waveguide technology used in the speaker enhances the dispersion of sound throughout the room, ensuring that listeners can enjoy a consistent audio quality, regardless of their position.

Connectivity is another area where the JBL 260 excels. The speaker includes versatile connection options, such as Bluetooth, allowing users to stream music wirelessly from smartphones, tablets, or computers. This makes it incredibly easy to integrate the JBL 260 into modern home entertainment systems. With a range of inputs, including RCA and auxiliary ports, the speaker can accommodate various audio sources, making it a great choice for both casual listening and serious audio setups.

The design of the JBL 260 is both sleek and functional, with a modern aesthetic that fits seamlessly into any décor. Its sturdy construction not only contributes to its durability but also enhances sound quality by minimizing unwanted distortions. The speaker is available in various finishes, allowing users to choose a model that best suits their personal style.

In summary, the JBL 260 is a feature-rich loudspeaker that brings together advanced sound technologies, versatile connectivity options, and an attractive design. It stands out as an ideal choice for anyone seeking to elevate their audio experience, making it a solid investment for years to come.