Question about Onkyo TX-SR505 Receiver

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My sub woofer (450 watts) is low. I would expect that with a 450 watt sub I would wake up the whole neighborhood. except it is just mediocre

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If the output seems low or it IS low, there can be several reasons for that. Have you verified with low frequency material or with a test tone that the driver is moving? One reason to watch it is because if the subwoofer is not properly placed, you will have cancellation of certain frequencies depending on the room it's in and you won't hear them.
Second, is the output level of the sub set on the device that it is connected to and matched in level to your other speakers?
Be aware however that many brands, even those that have extremely exotic and expensive loudspeakers, often make mediocre subwoofers in their product line.

Posted on Jun 24, 2009

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1 Answer

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Hello
The power rating for this amp is as follows.
Two channel: Sub woofer: Min 35Watts
Two channel: Other than sub woofer : 70Watts
One channel: sub woofer; 100Watts
One channel: other than sub woofer: 200Watts.
OK.

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1 Answer

How do you bridge the jl audio 450/4


Nice amplifier. However it is best suited for speakers and not for sub woofers. Connect the plus (+) from speaker output 1 and the minus (-) from speaker output 2. Connect the plus (+) from speaker output 3 and the minus (-) from speaker output 4. Now the amplifier is in bridge mode, which will give you 300 WATT RMS at 4 OHM load. If you are bridging the amplifier to run sub woofers then do not forget to set the X- Over to LPF on the channels that you are planning to bridge. Whatever you do, make sure that the load you are asking the amplifier to play is no lower than 4 OHM. Playing this amplifier in bridged mode lower than 4 OHM is a recipe for trouble.
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1 Answer

Car subwoofer just past half volume cuts off the amp


Assuming there is no short, or lose ground wire somewhere inside the box, diodes( in the amp) are fine, you might be overheating it by not allowing it to get good ventilation. This can be a big deal on some low end Chinese amps. Or the speakers are blown , or your Resistors (in the amp) are bad, but for arguments sake.
Most people don't use the proper size and or conductivity types of wiring, for pushing high amperage Think about it like this, Watts (power) =.Amps (energy) x Voltage (pressure) Resistance or Ohm's (amount) determines how much Wattage will go in or out, Ohms = Volts x2 / Watts.
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1 Answer

What speakers


Hello enot99,

The CC-2502 is a bridgeable 2-channel amp. If you want to drive normal speakers in stereo, the best would be a good set of components with separate woofers, tweeters, and crossovers. They are available in many sizes from most car audio manufacturers. I'd begin by finding out what speakers fit the location where you intend to mount them. Then I'd browse the speaker selections in that size at www.crutchfield.com. You can also use the "outfit my car" feature to browse only the products that fit. Then select a pair that has a power range and impedance to match the amp: 250 watts RMS at 4ohms or 450 watts RMS at 2ohms.

If you want to use the amp in bridged mono mode to drive a subwoofer, again Crutchfield has a large selection of subs and some enclosures already fitted with subs (loaded). The amp claims 850 watts RMS into 4ohms bridged, so look for a sub that has a power handling rating of at least 850 watts and it needs to be 4ohms.

Hope this helps.

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2 Answers

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Hello monkey_flea, Your subs will share the amp output. And if you are not careful, you'll end up blowing them. The amp puts out 1300 watts RMS at 2ohms, the subs have an RMS power range of from 75-350 watts, and you'll be driving them with 650 watts each. A better power match would be to series the subs to present an 8ohm final load. This will reduce the output power to a level the subs can handle. Or you could buy 2 more 12.1's and connect them series-parallel for a 4ohm load and each sub would still be getting 325 watts RMS, just about the maximum they are rated to handle. Hope this helps.

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1 Answer

Subwoofer to receiver hookup


In general, there are two ways to hook up your sub-woofer. First using the high level outputs from your receiver ( speaker output from the front R & L speaker terminals ) run a set of wires from the outputs to the speaker inputs on the sub-woofer, you do this in concert with the speaker wires going to the front R & L speakers which you then attach to the R & L speaker outputs on the sub woofer amp. Note that the sub woofer doesn't power your front speakers, the connections from the sub amp are just a pass through connection where the signal needed by the sub is parasitically taken from the inputs.
Second is via a low level output from your receiver / amp to the low level input on your sub amp. This is normally done via a RCA type of patch cable and connected to the sub woofer RCA jack on the rear of the source receiver or amp, Next run the patch cord to the sub amp an into the RCA jack input. IF you have a right and left input, use the Right input.

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1 Answer

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