Reply to thread

Message

<blockquote data-quote="kev7706" data-source="post: 3065047" data-attributes="member: 557805">I&#039;m trying to set the gains on a Sony ES XM-3546 (<a href="http://ampguts.realmofexcursion.com/Sony_XM-3546/" target="_blank">http://ampguts.realmofexcursion.com/Sony_XM-3546/</a>). The rear channels are bridged to give a TC-1000 130 watts at 4 ohms. Following JL&#039;s website, I determined a peak voltage of ~23 (sqrt(130*4)). I set the Eclipse radio&#039;s volume to 65/80, disconnected sub leads, and put in a 50 Hz (0 db) sine tone. I tapped voltmeter leads to the + left and - right terminals (the ones used for bridging), and turned the gain until reaching the 23 volts previously calculated.The problem is that my sub is now very quiet, even with the volume knob at 65. I realize the sub is well underpowered - 400 watts RMS - but I&#039;ve cranked it up FAR louder in the past without clipping. I&#039;ve also powered other subs with similar wattage and had better results. Did I do something wrong? Does this sub really need 300-400 watts to get moving? I&#039;m not looking for earth-shattering bass, but right now this sub doesn&#039;t even keep up the fronts, which are only getting 35 watts. I can&#039;t turn the front channel gain knob far enough down to compensate for the sub&#039;s lack of output.</blockquote>

[QUOTE="kev7706, post: 3065047, member: 557805"] I'm trying to set the gains on a Sony ES XM-3546 ([URL="http://ampguts.realmofexcursion.com/Sony_XM-3546/"]http://ampguts.realmofexcursion.com/Sony_XM-3546/[/URL]). The rear channels are bridged to give a TC-1000 130 watts at 4 ohms. Following JL's website, I determined a peak voltage of ~23 (sqrt(130*4)). I set the Eclipse radio's volume to 65/80, disconnected sub leads, and put in a 50 Hz (0 db) sine tone. I tapped voltmeter leads to the + left and - right terminals (the ones used for bridging), and turned the gain until reaching the 23 volts previously calculated. The problem is that my sub is now very quiet, even with the volume knob at 65. I realize the sub is well underpowered - 400 watts RMS - but I've cranked it up FAR louder in the past without clipping. I've also powered other subs with similar wattage and had better results. Did I do something wrong? Does this sub really need 300-400 watts to get moving? I'm not looking for earth-shattering bass, but right now this sub doesn't even keep up the fronts, which are only getting 35 watts. I can't turn the front channel gain knob far enough down to compensate for the sub's lack of output. [/QUOTE]

Verification