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Thank you for providing this manual and at low cost.
The Philips scope is of excellent quality, longevity and build and had a couple of faults
when it was passed to me. Having the CCT diagrams is a blessing.
I have fixed the problems and also modded the scope to my requirements.
I have built a 24v Li-Ion pack for portable use from old but good laptop batts.
it is working beautifully and I am well pleased. Keep up the good work Guys.
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manual was very helpful in learning how to propery use my washer. I could not find this manual anywhere else.
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Awesome quality manual. You really saved my bacon with this one. Was looking for some specific information with regards to my "new" vintage VCR that didn't come with the owners manual. This site is truely a goldmine of available manuals. The quality of the scans are top notch.
Thank-you so much for this awesome manual. If you're looking for this Sony SL-HF400 owners manual, this is the one you NEED to buy. Definitely worth the money.
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The manual was made available promptly. I is a clean scan of the original. I had no problem downloading it. The scan was well centered and cleanly formatted. It is as good a product as can be had without being the original document.
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Received downlink in less then 8 hours, Item was in good copy condition, and told me how to program the clock timer. The price was very resonable, and the process was very automated and was GREAT to work with.
POWER-HANDLING LIMITATIONS
The power-handling capability of any woofer is related to both its ability to dissipate heat and the maximum excursion limits of its cone. Once the speaker�s voice coil moves outside the magnetic gap, power can no longer be converted into motion and all the amplifier�s power is converted into heat in the voice coil. This voice-coil heating is the largest detriment to speaker longevity, so overexcursion should be avoided. Since speakercone excursion is different for each type of enclosure, power handling is different for each enclosure. Sealed enclosures exert the most control over the motion of a subwoofer because the air inside the box acts like a spring against the motion of the woofer cone. Larger boxes allow for more excursion, thus providing more low-frequency output for the amount of power used. When placed in a sealed box much larger than the Vas of the subwoofer, it will perform as if it were in an infinite-baffle installation. Vented and bandpass enclosures have the lowest amount of excursion for the amount of sound output. This is a result of port output reinforcing the sound output from the woofer. The mass of the air contained in the port provides an acoustic load on the woofer�s cone at the tuning frequency, and this added mass decreases woofer-cone excursion. Vented boxes do not provide adequate woofer control when driven below the tuned frequency (Fb), so proper design is important. A vented bandpass box will have the lowest overall cone excursion provided a subsonic filter is used. � Voice-coil overheating and burning due to overexcursion are often caused by overdriving an amplifier into �clipping. A severely clipped � signal, or square wave, contains nearly twice the power of a clean sine wave at the same level. Bass that sounds broken up and distorted at higher volumes is usually indicative of an amplifier that is clipping and being asked to deliver power beyond its ability. � Infinite-baffle or �free-air� mounting applications allow for greater cone excursion than subwoofers mounted in an enclosure. In order to compensate, the power handling of the subwoofer will likely be half its rated power in this application. � Study the excursion curves on the enclosed Reference Series data sheet and note the differences for different enclosure applications. The type and size of box used will produce different excursion demands on the enclosed subwoofer and, consequently, different levels of power handling. As long as the recommended enclosure parameters are used, the subwoofer will perform properly in its enclosed environment. However, any design deviation may result in less than optimum performance, and may also subject the subwoofer to overexcursion (i.e., where the voice coil leaves the gap) that can eventually damage the speaker. For additional help with this issue, please contact your authorized Infinity dealer.
SPECIFICATIONS
Reference 1020w Configuration: Nominal Impedance: Power Handling: Sensitivity @ 2.83V/1m: Frequency Response: Mounting Depth: Cutout Diameter: Reference 1220w Configuration: Nominal Impedance: Power Handling: Sensitivity @ 2.83V/1m: Frequency Response: Mounting Depth: Cutout Diameter: 10" subwoofer 4 ohms 250W RMS/1000W peak 90dB 22Hz � 800Hz 5-1/2" (140mm) 9-1/4" (235mm)
12" subwoofer 4 ohms 300W RMS/1200W peak 92dB 20Hz � 800Hz 6-1/8" (156mm) 11-1/8" (283mm)
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