Because mono amps tend to be Class D amplifiers, they are a good choice for powering subwoofers — Class D amplifiers have a high power-to-heat ratio and excellent efficiency, which are exactly what you want when dealing with power-hungry low frequency signals. Most mono amplifiers are designed to run at 2 ohms; some are even 1-ohm stable. Multichannel amplifiers, on the other hand, are typically designed to work with a 4-ohm load.

No, you can not bridge a mono amp because there is nothing to "bridge" to — whatever impedance load you present to amplifier is the actual load that it sees. This differs from a multichannel amp in that when you bridge two channels together, you halve the load presented to them (for example, 2 4-ohm woofers wired in parallel and bridged to a stereo amplifier is "seen" as a 1-ohm load to that amp).

Impedance is the amount of resistance speakers provide to the current flowing from the amplifier. Every time you halve the speakers' impedance — switching from a 4-ohm to a 2-ohm sub, for instance — you effectively ask the amplifier to double its output. Some amps can handle this lower impedance, some cannot. The key thing to know about impedance, then, is how to match your speakers to the capabilities of your amp.

Connect the speaker leads across the two red binding posts, using channel one binding post as the + (hot) connection or on CE's with Speakons across pins 1+ and 2+ on the channel one output.

Note: For those amplifiers with IOC (Input-Output Comparator) the channel two IOC indicator will illuminate when the unit is operated in Parallel-Mono. Note: CE Contractor Series (CH/CL Series) CP660, D Series and K Series amplifiers cannot operate in a Parallel-Mono mode.

In general the amplifier power should not be greater than the power range we recommend in our specifications. Please note though, our specifications are ratings based on the amplifier specifications being honest, this means that the amplifier manufacturer should be quoting the power as continuous RMS power 20Hz ? 20KHz.

The benefits of hooking up two subs to a mono amplifier are the same as hooking up any other number of subs to a mono amp: you can push the subs with more power at lower impedances. Because lower frequencies are less directional (i.e. it's more difficult for your ears to determine where low frequencies come from than highs), bass is often transmitted in mono. Mono here refers to a single channel (as opposed to stereo, or two channels), not one speaker.

Generally, the deciding factor to this dilemma is the total speaker load impedance you wish to drive. With Micro-Tech and Macro-Tech amplifiers you would want to use Bridge Mono to get the most power available when driving 8 or 4-ohm loads (one or two 8 ohm speakers). With a Power-Tech or Com-Tech amplifier you need to stay at 8 ohms or greater. Parallel Mono can be used when driving lower impedance loads. A one-ohm load can be driven Parallel Mono with a Micro-Tech or Macro-Tech.

Bridge/Mono mode allows a higher load (usually around 2ohms) to be handled more effectively by the amp. It puts the amplifier into a "push, pull" configuration, utilizing both sides of the amp into one single output. Our real answer here is that you should only run in bridged mode when you simply have no other choice. You should always choose the right amp for the load being placed on it.

Output power specifications are provided in the specifications area for each Crown amplifier model. If you can't find your model of Crown amplifier try the Legacy amps page.

It is important to realize that the power requirements of a fully active and open baffle loudspeaker, like the ORION, are quite different from those of a conventional box speaker. Woofer, midrange and tweeter drivers each have their own power amplifier assigned to them. The amplifier need not have any more output power than what is needed to push the driver to its full cone excursion. Any more power than that can lead to damage of the driver.

Using thicker power and ground cables will allow your amplifier to draw the juice it needs from the battery more easily. You'll find all the power and ground cable you need available in our online Installation Store. Before you can decide on the appropriate gauge wire for your installation needs, you need to figure out the current demand of your system. To do that, you must ascertain the approximate current draw (in amperes) of your amplifier (or amplifiers).

Yes you certainly can. Some users say that the use of a pre-amp increases dynamics - especially transformer coupled designs like our Line-Only Pre-Amplifier. A pre-amp can also be useful if you need to use long signal cables. Click here to read an article where Andy Grove of Audio Note UK discusses some of the technical issues and benefits of 1x oversampling.

The vast majority of people should use a mono cable (connect it to the SUBWOOFER or LFE output on your receiver). Use stereo cables only with 2-channel stereo preamps.

Yes. I have had one student who used regulated power supplies because the bargain transformer that he bought had too high a secondary voltage rating. He designed regulators to drop the voltage down to the required values. I have no recommendations on the design of the regulators. They must be able to pass the full amplifier current and the pass transistors in them must be heat sinked. In effect, each regulator is another power amplifier that supplies voltage and current to the amplifier.

Divide the peak power rating (Watts) of the speaker in half, which will give you the root-means-square (RMS) rating. Also note the speaker's listed Ohm load rating. The specs for your power amp list the RMS output power (in watts) for different speaker loads (8 Ohm, 4 Ohm, sometimes 2 Ohm). The general rule in selecting which amp to use with your speaker is to make sure that the amp's RMS power rating at your speaker's Ohm rating doesn't exceed the RMS power rating of the speaker.

You want to make sure to use the same size wire for power and ground no matter what the setup is. Generally, 4 gauge power and ground wires will work for smaller amplifiers such as used with 4 channel amplifiers for your high and mid-range. For larger subwoofer amplifiers, 2 gauge is suggested. This is not always the rule however. Depending on how long the power cable needs to be, and how much current the amplifiers in the system will draw, you might need to adjust your size of wire used.

Within one SMIL layout, you can arrange multiple media (e.g. videos) which are synchronously played. In case of playing a multichannel SMIL content, relatively high performance PC is required.

Yes, by only wiring one voice coil, you can cause damage to the subwoofer making it unplayable. You always need to wire both voice coils together.

Choose the product that fits your application. Determine your application by deciding if your primary need is voice communication (cell phone) or data communication (computer). If your primary need is data communication, a direct connect amplifier will provide the best, most reliable connection possible. Recommendations based upon achieving proper antenna separation when using an amplifier/repeater and outside signal strength of -70 to -90 dB.

We recommend when replacing power valves they need to be replaced with the same type and model and they are matched, the amplifier will also need to be re biased to match the new valves to the amplifier. All work of this nature must be carried out by a qualified engineer.

Most amplifiers used for Wireless ISP purposes (including 2.4Ghz flavors) are rated for output power. Therefore, input power and losses prior to the amplifier can be ignored. Typically, the amplifier is mounted very close to the external amplifier, without any extension cables or extra connectors.

Because it's a great way to increase musical detail, dynamic range, and volume, adding a power amplifier is an extremely popular factory system upgrade. And when the weather gets warm, even more people tell us they're looking for a system that can deliver roll-down-the-windows volume. But your factory radio poses a challenge. It usually doesn't offer preamp outputs.

Option 1 (dedicated wiring): The Touchscreen Amplifier (TA) power supply is often remotely located and connected via unused speaker wires from the basement to the TA j-box. Option 2 (CAT5e wiring): When wall mounting the TA, the practical approach is locating the power supply remotely and coupling it into the CAT5e near the Ethernet switch using the Power Coupler accessory (power is carried on unused pairs).

The output of a speaker (measured in decibels (dB)) for a given amount of amplifier power is termed its efficiency. Speakers with high efficiency will require less amplifier power to produce a given sound pressure level. Live music and movie soundtracks have peak levels as high as 120 dB. To attain just a 3 dB increase in volume, an amplifier's power must be doubled regardless what the speaker efficiency.

Most members pay through a standing order system. This covers subs, match fees (including teas) and training fees paid in five payments across the season. The total cost for the 2007/08 is ?310 (with a surcharge for members of the 1st and 2nd XIs). Alternatively members can pay a one-off subscriptions fee of ?185.00 plus ?10 per game, but if you are going to play more than 13 games a season it makes sense to pay by standing order.