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    242X Stereo - How to Exploit Free Unused Watts

    This is commonly done. I can only think of two multi-channel amplifier models that require symmetrical front and rear loads. So don't give it another thought.
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    242X Stereo - How to Exploit Free Unused Watts

    Not surprising because doubling the power PLUS doubling the sub surface area gives you a 6 dB increase. It would take a bit more than that (a 10 dB increase) to create the perception of twice as loud for fullrange, however, low bass requires a little less to give the perception of more. Our...
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    SMD DD-1 Distortion tool, Anyone used one?

    This method makes me nervous. If the voltmeter expresses AC voltage as peak then this could possibly work. However, most voltmeters express AC voltage as RMS, and you could get a much larger multiple of the non-clipped voltage before the voltage would stop increasing. Plus, once the wave form is...
  4. D

    Need Help with picking Speakers.

    You can bank on the fact that all JL Audio amplifiers exceed specs. It is a JL Audio cultural thing. In fact, JL Audio amplifiers, including the unregulated XD/M series, will typically meet their 14.4 volt rating even with a 12.6 volt supply. PASMAG did an independent review of the XD500/3 and...
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    Need Help with picking Speakers.

    I would say Exile is a good value at a lower cost than Wetsounds but not at all comparable to Wetsounds at the same cost.
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    SMD DD-1 Distortion tool, Anyone used one?

    No, that's not at all strange. Because you are measuring two very different paths. Some HU preouts clip @ 85% and some do not clip @ 100%. The flipside is that you could one day add a BT module with a 2 volt output that would cause your HU to clip or even saturate the Aux input. Again, the test...
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    SMD DD-1 Distortion tool, Anyone used one?

    That is an excellent tool as long as you don't use it as the final word. It will accurately show the max non-clipping voltage at every gain stage in the signal path except for the very final stage. Just keep a few things in mind. You can't use a sine wave at full power to speakers so the...
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    Need Help with picking Speakers.

    Here is a video about written/printed mobile electronics manufacturer specs. Everyone should watch this.
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    Need Help with picking Speakers.

    Ummm, Food labels? Yes, there's a governing body. Audio equipment? No governing body. Often just snake oil for the uninformed. Anyway, I totally get your point and from now on will be sure to direct you to Boss and Pyle equipment based on superior power to dollar specs.
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    battery calculator

    In any case, the circuit should be fused with the appropriate value. That ends the risk. Many Pros use a relay when amplifiers exceed two, and almost never use a relay with just one amplifier.
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    Need Help with picking Speakers.

    OMG. Those specs are absolutely/positively MEANINGLESS! One by one I can demonstrate how utterly useless every one of the specs are. Polk, originating from a home audio company before the car audio side was purchased by an Asian car alarm company, used a 2.83 voltage/ 1 meter standard based on...
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    battery calculator

    Most amplifier turn-on circuits will draw no more than 35 to 40 milliamps. The source unit circuits are generally rated for a minimum of a .4 amp draw, which is to say that you could safely run 3 to 4 amplifiers plus power a pre-level EQ and a BT module. However, I don't recommend it. The source...
  13. D

    Need Help with picking Speakers.

    Yes, the Polk is a very good sounding speaker, and a good value. No question. But they are NOT more sensitive than the MX JL or 650 Wetsounds. And the Polk MM/UM will not handle as much power as either the JL or Wetsounds. I've tested all these products side-by-side, quick AB, on big power, in...
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    Need Help with picking Speakers.

    For in the boat, if you have the space for a larger 7.7" speaker then definitely go that route. Greater surface area will be more of a factor than any of the other speaker design and construction elements. Add to that, the JL Audio is the top speaker in my book, engineered in the US, built in...
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    Need Help with picking Speakers.

    Yes, but the specs are meaningless when comparing brand to brand. There is no standardization. Frequency response? 40 dB down at 40 Hz? They don't qualify the response within a given decibel range or at a specific decibel level. Sensitivity? Voltage or wattage? Tested with what type noise...
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    Need Help with picking Speakers.

    There is no substitute for surface area. And a 770 is just plain larger. Pretty much ends the debate.
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    battery calculator

    How are 6V batteries different? Or better? Really depends on the application. First, they are made for a specific application. You can series 6 volt batteries and have a greater variety of increments than that of the 12 volt route. Golf carts come in different sizes. Aside from that issue, a 12...
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    Need Help with picking Speakers.

    Yes, but that review is well documented as the biggest scam EVER!!! Purch Labs? OMG. It's not a lab at all. The 'test' method is a complete joke. The author knows next to zero about audio. You pay to get the #1 rating. However, that doesn't mean the Polk isn't a good speaker. It is a good...
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    battery calculator

    An unavoidable truth in deep cycle batteries is that weight is the best indicator of capacity. And guess what. 6 volt batteries are heavy! I do believe that 6V golf cart batteries have performance and longevity on their side. The flipside is the ease of two AGM 31s. Either will start your...
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    battery calculator

    Forget the calculations. A DC equation doesn't translate to an AC (music) application. There are dozens of other variables too. System design. System tuning. EQ. Type of music. Amplifier efficiency at a) different volume levels, b) different impedances, c) different supply voltage levels, etc...
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