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color me disappointed
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<blockquote data-quote="husker77" data-source="post: 7763129" data-attributes="member: 641116"><p>Well got my kid's stereo put in.</p><p></p><p><a href="http:////forums/car-audio-build-logs-cars-trucks-suvs/548161-single-12-ext-cab-s-10-a.html" target="_blank">http://www.caraudio.com/forums/car-audio-build-logs-cars-trucks-suvs/548161-single-12-ext-cab-s-10-a.html</a></p><p></p><p>With the amp bridged it should be putting out 400 watts, but to get any output I had to turn the gain all the way up to get decent output. I tried to set it with a dmm on a 40hz tone I downloaded to my laptop. I had the laptop volume all the way up and set the deck volume at 20, it goes up to 30. It showed 40 ac volts with the gain all the way up so I thought that should be ok, but the amp seemed to be getting a little to hot.</p><p></p><p>So I put in my da7232 amp and wired the sub to one channel so should be pushing 500 watts to it. Still have to turn the gain all the way up to get decent output.</p><p></p><p>Voltage is staying over 14 volts.</p><p></p><p>This is the sub he is running... <a href="http://www.car-stereos-online.com/products/eclipse/eclipse_sw7124dvc_t2_description.htm" target="_blank">SW7124DVC-T2 Eclipse 12 Inch Subwoofer (SW7124DVC-T2)</a> and it is wired to 4 ohm.</p><p></p><p>Here is his head unit...<a href="http://www.alpine-usa.com/product/view/cde-121/Specs" target="_blank">Alpine Electronics of America, Inc.</a></p><p></p><p>Poor choice in head units, my fault.</p><p></p><p>Here is the specs to the amp that is hooked up, like I said I am only running off one channel.</p><p></p><p>Output Power at 13.8V:</p><p></p><p>2 x 500W @ 4 ohms (0.005% THD)</p><p></p><p>2 x 1000W @ 2 ohms (0.007% THD)</p><p></p><p>S/N Ratio: &gt;120dB</p><p></p><p>Freq. Response: 4Hz 3kHz</p><p></p><p>Crosstalk: &gt;80dB</p><p></p><p>Damping Factor: &gt;1000</p><p></p><p>Max Current Consumption: 200A</p><p></p><p>Here are the specs for the smaller eclipse 33250, I think this should power it decent.</p><p></p><p>Max. Power Output 310W × 2ch (2Ω) 310W × 2ch (2Ω)</p><p></p><p>2Ω 200W × 2ch 200W × 2ch</p><p></p><p>Power Output 4Ω 130W × 2ch 130W × 2ch</p><p></p><p>4Ω bridged 400W × 1ch 400W × 1ch</p><p></p><p>THD @ Rated Power @ 2Ω stereo 0.008% 0.008%</p><p></p><p>@ 4Ω stereo 0.004% 0.004%</p><p></p><p>@ 4Ω bridged 0.008% 0.008%</p><p></p><p>Signal to Noise 105dB 105dB</p><p></p><p>Freq. Response +0, –0.7 +0, –0.7</p><p></p><p>Crosstalk –75dB –75dB</p><p></p><p>Slew Rate 10Vμs 10Vμs</p><p></p><p>Damping Factor @ 60Hz &gt;200 &gt;200</p><p></p><p>Input Sensitivity 0.2 ~ 8V 0.2 ~ 8V</p><p></p><p>Max. Current Consumption (4Ω) 50 amps 50 amps</p><p></p><p>CHANNELFLEX CROSSOVER</p><p></p><p>Amp Crossover High Pass 12dB/octave 120Hz —</p><p></p><p>Low Pass 12dB/octave 50 ~ 200Hz 50 ~ 200Hz</p><p></p><p>Pre-Out Crossover High Pass 12dB/octave 50 ~ 200Hz —</p><p></p><p>Low Pass 12dB/octave — —</p><p></p><p>Subsonic Filter Freq. Range 0 ~ 50Hz 20Hz (Fix)</p><p></p><p>12dB/octave 12dB/octave</p><p></p><p>Slope 24dB/octave 24dB/octave</p><p></p><p>(Switchable) (Switchable)</p><p></p><p>Dimensions (W × H × D) 11.32˝ × 2.05˝ × 11.85˝</p><p></p><p>What am I doing wrong, why do I have to have the gains all the way up to get any output. I know the prefabbed sealed box is a limiting factor, and I intend to remedy it quickly, but I still should have decent bass shouldn't I?</p></blockquote><p></p>
[QUOTE="husker77, post: 7763129, member: 641116"] Well got my kid's stereo put in. [URL="http:////forums/car-audio-build-logs-cars-trucks-suvs/548161-single-12-ext-cab-s-10-a.html"]http://www.caraudio.com/forums/car-audio-build-logs-cars-trucks-suvs/548161-single-12-ext-cab-s-10-a.html[/URL] With the amp bridged it should be putting out 400 watts, but to get any output I had to turn the gain all the way up to get decent output. I tried to set it with a dmm on a 40hz tone I downloaded to my laptop. I had the laptop volume all the way up and set the deck volume at 20, it goes up to 30. It showed 40 ac volts with the gain all the way up so I thought that should be ok, but the amp seemed to be getting a little to hot. So I put in my da7232 amp and wired the sub to one channel so should be pushing 500 watts to it. Still have to turn the gain all the way up to get decent output. Voltage is staying over 14 volts. This is the sub he is running... [URL="http://www.car-stereos-online.com/products/eclipse/eclipse_sw7124dvc_t2_description.htm"]SW7124DVC-T2 Eclipse 12 Inch Subwoofer (SW7124DVC-T2)[/URL] and it is wired to 4 ohm. Here is his head unit...[URL="http://www.alpine-usa.com/product/view/cde-121/Specs"]Alpine Electronics of America, Inc.[/URL] Poor choice in head units, my fault. Here is the specs to the amp that is hooked up, like I said I am only running off one channel. Output Power at 13.8V: 2 x 500W @ 4 ohms (0.005% THD) 2 x 1000W @ 2 ohms (0.007% THD) S/N Ratio: >120dB Freq. Response: 4Hz 3kHz Crosstalk: >80dB Damping Factor: >1000 Max Current Consumption: 200A Here are the specs for the smaller eclipse 33250, I think this should power it decent. Max. Power Output 310W × 2ch (2Ω) 310W × 2ch (2Ω) 2Ω 200W × 2ch 200W × 2ch Power Output 4Ω 130W × 2ch 130W × 2ch 4Ω bridged 400W × 1ch 400W × 1ch THD @ Rated Power @ 2Ω stereo 0.008% 0.008% @ 4Ω stereo 0.004% 0.004% @ 4Ω bridged 0.008% 0.008% Signal to Noise 105dB 105dB Freq. Response +0, –0.7 +0, –0.7 Crosstalk –75dB –75dB Slew Rate 10Vμs 10Vμs Damping Factor @ 60Hz >200 >200 Input Sensitivity 0.2 ~ 8V 0.2 ~ 8V Max. Current Consumption (4Ω) 50 amps 50 amps CHANNELFLEX CROSSOVER Amp Crossover High Pass 12dB/octave 120Hz — Low Pass 12dB/octave 50 ~ 200Hz 50 ~ 200Hz Pre-Out Crossover High Pass 12dB/octave 50 ~ 200Hz — Low Pass 12dB/octave — — Subsonic Filter Freq. Range 0 ~ 50Hz 20Hz (Fix) 12dB/octave 12dB/octave Slope 24dB/octave 24dB/octave (Switchable) (Switchable) Dimensions (W × H × D) 11.32˝ × 2.05˝ × 11.85˝ What am I doing wrong, why do I have to have the gains all the way up to get any output. I know the prefabbed sealed box is a limiting factor, and I intend to remedy it quickly, but I still should have decent bass shouldn't I? [/QUOTE]
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