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Car Audio Equipment
Subwoofers
Frankensub - a cheap Edge meets a marginally less cheap GT5
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<blockquote data-quote="bbeljefe" data-source="post: 8285761" data-attributes="member: 655960"><p>If your front stage is on head unit power you'll want to set the head unit volume control at 50-55% of full volume for gain setting. If that head unit goes to 45 then that setting would be 23-5. That setting is about where the head unit amplifier will begin to distort. After that, set bass/treble and or all EQs to flat, turn off any loudness or bass boost circuits and find yourself a 40Hz -5dB test tone. You can get the DD-1 test tracks <a href="http://www.damoreengineering.com/dd1.html" target="_blank">here</a> at the bottom of the page, then convert the .rar file and use track <a href="http:////forums/usertag.php?do=list&amp;action=hash&amp;hash=3" target="_blank">#3</a> .</p><p></p><p>Then, on your amp, set gain &amp; bass boost(if any) to their lowest setting and set the low pass filter to its highest setting. Set the meter to AC voltage on the 200 volt scale and with the sub disconnected, probe the speaker outputs from the amp while playing the 40Hz tone mentioned above. Then turn the gain up until your meter displays the target voltage.</p><p></p><p>Since I don't know if your amp is setup for 4Ω or 2Ω operation, there are two choices on the target voltage. If it's a 2Ω stable amp and we set the gain for 300 watts on your 4Ω sub it's likely to overdrive the amp but, if we set it to 150 watts we may be leaving some power on the table. With that in mind, set the amp to 25 volts of output first. The gain knob should end up somewhere around the 1 o'clock position. If so, it's not 2Ω stable. But if it's still at or around the 10 o'clock position, you have more power available safely. And in the latter case, go ahead and turn the gain up until the output voltage is 34 volts.</p></blockquote><p></p>
[QUOTE="bbeljefe, post: 8285761, member: 655960"] If your front stage is on head unit power you'll want to set the head unit volume control at 50-55% of full volume for gain setting. If that head unit goes to 45 then that setting would be 23-5. That setting is about where the head unit amplifier will begin to distort. After that, set bass/treble and or all EQs to flat, turn off any loudness or bass boost circuits and find yourself a 40Hz -5dB test tone. You can get the DD-1 test tracks [URL="http://www.damoreengineering.com/dd1.html"]here[/URL] at the bottom of the page, then convert the .rar file and use track [URL="http:////forums/usertag.php?do=list&action=hash&hash=3"]#3[/URL] . Then, on your amp, set gain & bass boost(if any) to their lowest setting and set the low pass filter to its highest setting. Set the meter to AC voltage on the 200 volt scale and with the sub disconnected, probe the speaker outputs from the amp while playing the 40Hz tone mentioned above. Then turn the gain up until your meter displays the target voltage. Since I don't know if your amp is setup for 4Ω or 2Ω operation, there are two choices on the target voltage. If it's a 2Ω stable amp and we set the gain for 300 watts on your 4Ω sub it's likely to overdrive the amp but, if we set it to 150 watts we may be leaving some power on the table. With that in mind, set the amp to 25 volts of output first. The gain knob should end up somewhere around the 1 o'clock position. If so, it's not 2Ω stable. But if it's still at or around the 10 o'clock position, you have more power available safely. And in the latter case, go ahead and turn the gain up until the output voltage is 34 volts. [/QUOTE]
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Frankensub - a cheap Edge meets a marginally less cheap GT5
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