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    Dual Bank Charger

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    Dual Bank Charger

    On most any contemporary chargers (but always check with your manufacturer to be safe) you would not need to disconnect one bank at a time. Yes, if the two batteries are fixed in parallel as one, the dual bank charger isolation is circumvented, the batteries are viewed as a single battery, and...
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    242 stereo upgrade coming soon!

    Input selector?
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    Subwoofer size and location

    Sure, for the 'Sd' (radiating surface area) you start with the speaker diameter which is the center peak of the surround to the center peak of the surround....and not the cone edge to cone edge. Then the surface area is (radius X radius) X Pi (3.14). But then that covers just one issue when the...
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    Can (should) I place a speaker parallel to a high level (speaker output) to line level converter?

    A little (or a lot of) speculation here on my part. The SNI internal coupling transformers would apply to the output side. To satisfy the source unit output circuit there might first be a lower input resistance. Check with PAC to get this number or measure the input resistance across the PAC SNI...
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    Speaker pop

    Normally I would say this is a simple easy-to-remedy wiring issue. Nothing should 'Pop' if the stereo source is turned off prior (by several seconds) to the battery switch being turned off. What gives me pause is that the 'Pop' is on one of four channels only. I would switch speaker wires at the...
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    Subwoofer size and location

    Guy doesn't even know the basics, like how to correctly calculate Sd. So much misinformation. So sad.
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    SMD DD-1 Distortion tool, Anyone used one?

    Actually the HU is included in the JL Audio method. The HU is at 75% gain which ensures no significant clipping from just about any HU. Then the HU supplies the test tone signal whether by a CD or file.
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    Subwoofer size and location

    It is actually pretty simple. If the ultimate output is your goal, then follow this basic prescription. First, determine the maximum sub enclosure that you and your boat space will permit. From the enclosure size, determine the maximum size of sub driver that will work in an optimum manner in a...
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    Subwoofer size and location

    Most of the on-line references to a Sundown loaded T-line enclosure are a complete misunderstanding of what a true transmission line really is. As an example of a true transmission line, look at an IMF TLS-80, which uses a T-line to mostly attenuate the rear wave via a highly damped path before...
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    Subwoofer size and location

    By a "T-Line" box do you mean a quarter-wave transmission line?
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    Line driver?

    The PAC unit would work if you just want to increase the line voltage before splitting it to multiple inputs. The Kicker ZXMRLC dual-zone line-driver/level-controller provides an increase in line voltage while providing dual zone controls, whether that is used as a fader, or transom to in-boat...
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    Line driver?

    I know for a fact that the radio openings are chewed out by beavers. Hope this helps.
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    Bypass capacitor and or resistor in bow light (Flip style on vortex)

    Resistors are rated in resistance (ohms) and wattage. No reason for a resistor to have a voltage rating. Capacitors (the round black thing) will not pass DC so you can't test a capacitor without an AC source. A capacitor is typically rated in microfarads (or some increment of farad) and voltage...
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    Subwoofer size and location

    I've heard some great 13.5 and 15-inch subs. If you have not, then you haven't experienced a good one or you haven't experienced good execution. Yes, the greatest surface area, no matter how you achieve it, determines the peak output level. But a quantity of ten 8" subs won't go any lower than a...
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    Bad radio signal after amp installed.

    Loss of FM signal is not uncommon in boats and even some cars when adding an amplifier. The DC to AC to DC high-speed switching power supplies can emit a great deal of high frequency interference. Class G amplifiers are especially bad. A few decades ago, amplifiers could even interfere with...
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    242X Stereo - How to Exploit Free Unused Watts

    That might be a good conversation for another time and another thread. Good subwoofer performance is much like matching the vehicle weight, coil springs, and shock absorbers. Not every combination works well. Nor is everyone going to appreciate the fine tuning. Getting past that issue, you've...
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    Bad radio signal after amp installed.

    Which brand and model of amplifier?
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    242X Stereo - How to Exploit Free Unused Watts

    About .6 to .65 net sealed for a 10-inch sub. To use the air trapped in the enclosure to correctly damp and control the cone movement, the enclosure must be perfectly airtight. Isolation inside the gunnel would be a huge task and very hard to get right. I wouldn't bother with it. The Polks are...
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    242X Stereo - How to Exploit Free Unused Watts

    Modern quality amplifiers run safely at a 2-ohm load. A little more distortion. A little less efficiently. More power. Less headroom. No reason at all not to do it. My only concern is the extreme, when you have a multi-channel amplifier (like a 6-channel) that is loaded down to the minimum...
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