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D-fend SA300 User Manual

Manual is about: Loudspeaker Protection stand alone unit

Summary of SA300

  • Page 1

    User manual compliance ..........................................................2 warranty information .........................................2 introduction d-fend™ overview .........................................3 typical applications ........................................3 what not to do wi...

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    2 d-fend™ sa300 user manual compliance please note there is a shock hazard and there are no serviceable parts inside this device. D-fend is fcc class a certified, ce certified, and rohs/weee compliant. Please read the manual before using this product. Warranty information the eminence/d-fend technol...

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    3 d-fend™ sa300 user manual introduction the patent pending d-fend technology utilized within your sa300 makes use of advanced, high-efficiency power conversion techniques to provide an unprecedented level of protection for your loudspeaker system. Due to the architecture of the d-fend technology, t...

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    4 d-fend™ sa300 user manual use your ears! The d-fend sa300 is in the output signal chain. Monitor the quality of the sound as you make adjustments. If you have lost significant overall level, low frequency, or high frequency information then further adjustments to the settings are needed. Proper se...

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    5 d-fend™ sa300 user manual c. Lf peak – this led indicator illuminates in the event that the user-defined low frequency peak voltage thresholds have been matched or exceeded. A red light here signifies peak voltages in the low frequency band have triggered attenuation. A green light here in conjunc...

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    6 d-fend™ sa300 user manual thermal limits d-fend incorporates built-in thermal protection circuitry which will temporarily disable the unit in the event that the thermal limit has been reached or exceeded. Failure to mount the device in the recommended orientation will increase the likelihood of re...

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    7 d-fend™ sa300 user manual fb –the frequency at which the tuned ports minimize the cone excursion. Below that frequency, the cone excursion increases as the enclosure starts to behave as an open box without proper restoring force for the cone. For this reason, many cabinet design programs such as e...

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    8 d-fend™ sa300 user manual slope – the angle at which a filter is applied, expressed in db/octave. Higher numbers represent steeper slopes and provide greater protection at frequencies below the filter knee. 200 500 300 400 1k 2k 5k dbr -6 -9 -12 -15 -3 0 3 ratio vs. Frequency 6db per octave 12db p...

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    9 d-fend™ sa300 user manual voltage/watts table power 25 50 75 100 150 200 250 300 400 500 600 700 800 900 1000 2000 3000 4000 nom z v v v v v v v v v v v v v v v v v v 2 Ω 7.1 10.0 12.2 14.1 17.3 20.0 22.4 24.5 28.3 31.6 34.6 37.4 40.0 42.4 44.7 63.2 77.5 89.4 4 Ω 10.0 14.1 17.3 20.0 24.5 28.3 31.6...

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    10 d-fend™ sa300 user manual each cabinet being an 8 ohm load rated at 800 watts. Note the output of the amplifier used to drive the subs, in this case a bridged mono amplifier rated at 2000 watts into a 4 ohm load, is connected to the input of the sa300. The output of the sa300 is connected to the ...

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    11 d-fend™ sa300 user manual to protect them will see a 4 ohm, 1000 watt load connected to its output. The amplifier used to power the top boxes, a bridged mono 1600 @ 4 ohm unit, is connected to the sa300’s input. Actual programming of the sa300 will be covered in the advanced programming section o...

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    12 d-fend™ sa300 user manual tweeter protection in figure 2.3, we have an example of a planar ribbon tweeter typically found in a high end studio monitor. Often these tweeters are powered by their own dedicated amplifier as shown in our example. Here the output of the amplifier, a 300 watt per chann...

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    13 d-fend™ sa300 user manual if you are using a normal pa type of amplifier that is designed to drive 4 or 8 ohm speaker systems and want to use it in a distributed 70 volt system, you may need to use a step up transformer to get the high voltage/low current required. If you do have to use a step up...

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    14 d-fend™ sa300 user manual set-up wizard step 1 – connect the d-fend sa300 unit to your computer via the usb cable provided. After launching the d-fend programming graphical user interface (gui) you will first be prompted to accept the terms and conditions (figure 3). After agreeing to the terms a...

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    15 d-fend™ sa300 user manual step 3 – once you have entered all of the required information into the wizard, click the calculate button. The wizard will then give you the recommended settings for your d-fend sa300. Please note: as a precautionary measure the wizard has automatically reduced your set...

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    16 d-fend™ sa300 user manual step 5 – now that you have the desired settings loaded into the main d-fend form, click the “connect” button at the top of the form. A warning box will appear asking, “overwrite current workspace settings?” when programming the d-fend unit using the wizard, you will want...

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    17 d-fend™ sa300 user manual mounting recommendation for maximum cooling potential, it is recommended to operate d-fend with the cooling fins positioned in a vertical orientation as illustrated in the drawing below. Failure to provide adequate exposure to ambient air may limit the performance or lif...

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    18 d-fend™ sa300 user manual please note: the software may not accept one of your entries exactly as entered, defaulting to the closest selection found in the microprocessor firmware. High frequency path configuration the first thing you will need to do is configure the hf’s high pass filter. This c...

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    19 d-fend™ sa300 user manual low frequency driver. Some trial and error will have to be used when determining the peak lf wattage or voltage. Always start off very conservative and slowly increase the peak power threshold and listen for sounds of woofer distress then back the threshold down till the...

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    20 d-fend™ sa300 user manual programming/tweaking the set-up examples dual sub setup in this example we are using a single sa300 to protect two subwoofer cabinets connected in parallel. To the sa300, it looks like one load that is 4 ohms and can handle 1600 watts. When setting up the sa300 for the f...

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    21 d-fend™ sa300 user manual this threshold down and/or adjust the lf filter parameters to better protect the system. Each time you make a change to the settings in the advanced programming gui you will need to send the new setting to the sa300. This setup process will be a judgment call on your par...

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    22 d-fend™ sa300 user manual send the settings to the sa300 used on the subwoofer system. Play some music that you are familiar with (either live or recorded), and watch the sa300 and listen to the music. Make any adjustments you feel are necessary and send the revised settings to the sa300. Once yo...

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    23 d-fend™ sa300 user manual lf set the lf filter to 85 hz and 2nd order slope. It could be argued that the lf path in this sa300 could be disabled since we know that they will see very little signal below 100 hz. They are electronically crossed over in the main system to the subwoofer, but in case ...

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    24 d-fend™ sa300 user manual hf set the wedges’ sa300 hf filter section to 2000 hz and a 2nd order slope. Set the rms wattage to 37 (or 10 volts) and the peak to 72 watts (or 14 volts). This is very conservative. You will have to see if you can raise these thresholds by trial and error. Ap set the a...

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    25 d-fend™ sa300 user manual if needed, and also allows for faster reaction times since the circuitry will be “powered up” all the time. It also affords the ultimate in audio purity since no audio power will be used to power the sa300 circuitry. In this example, our planar/ribbon driver is rated for...

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    26 d-fend™ sa300 user manual there are a couple of different 70v system architectures wherein you may consider using your sa300: 1. A 70v system utilizing a high-voltage amplifier directly driving a network of loudspeakers incorporating step-down transformers; 2. A standard 70v system wherein a step...

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    27 d-fend™ sa300 user manual 4. Verify that the calculated current is below the sa300 ratings: for direct drive scenarios without the use of step-up transformers, the previously determined current (i) will be the current flow propagated through the sa300; therefore: i = 3.53 arms, which is well belo...

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    28 d-fend™ sa300 user manual technical support following are the recommended steps to find the solutions to your technical issue: 1. Visit the faq page at http://www.D-fend.Net/support/faqs/ 2. Send an e-mail with “d-fend technical support” in the subject line to dfend@eminence.Com, and include a de...