DIY Hi-Fi: Class a Hybrid Headphone Amp

DIY Hi-Fi: Class a Hybrid Headphone Amp

Installing Multiple Amplifiers There seems to be some confusion when it comes to installing more than one amplifier. Should you use one power wire or multiple wires? Do you ground everything to the same point? How do you split the low level signal? Let me share my thoughts on the topic of installing multiple amplifiers. Power Wire With more amplifiers you’re going to need either more wire or larger wire.

How to hook up a car sub in a home theater

If not, click the link to take a peek, or visit our YouTube channel to find it and other great videos. These days, most people will utilize an auto-calibration of some sort, i. However, some entry level and older equipment will require manual setup. Audyssey’s standard auto-setup microphone. For best results, the microphone should be placed on a tripod in the main seating location, away from any surfaces, and you should step out of the room while the system is running.

There are SPL meter applications that you can download for a smartphone, and these will work, but they will likely be much less accurate than consumer-level SPL meter, like the Galaxy Audio CM , especially with subwoofers.

Stereo 3/4 way Crossover The example shows a 6-channel amplifier for simplicity, but you can also use three stereo amplifiers, one for each pair of drivers (tweeter, midrange, woofer). Once everything is set up to measure well, the parametric EQ blocks on the input channels can be used to fine-tune the final in-room response. You can.

A crossover is essential to split the audio signal into separate frequency bands and feed the correct driver. Crossovers use a single input signal and create two or three output signals consisting of separated frequencies that will be individually directed to the correct speaker — highs to tweeters, mids to woofers and lows to subwoofers. The basic types of crossovers are active and passive. Active crossovers are wired between the receiver and amplifier.

It will also cut out unwanted frequencies before the amp will try to boost them, so the amp will be fully concentrated on only boosting the right frequencies without wasting precious energy. This gives a huge boost in available power, dynamic range and provides complete control over the tones across the entire frequency range. The volume controls of an active crossover on each channel or pair of channels allow you to keep all notes put out by every speaker driver in balance.

For music maniacs obsessed with an idea to build an outrageously hardcore competition car audio system that will reimagine the sound quality and performance, adding a high-end active crossover is right what the doctor ordered. Active systems will let you play your music, your way. After a full-range signal from an amp goes into the crossover, it splits it into high notes which are directed to the tweeter while mid and low notes go to the woofer, respectively. When using a passive crossover, speakers change their impedances which causes inconsistent vocal sound definition.

In-line passive crossovers hook up before the amp and come set to a specific frequency without possibility to adjust them. This type of passive crossover is a perfect way to sharpen sounds in a component speaker system.

How to Hook Up a Crossover in a PA

They filter the audio signal by frequency and direct it to the best amp and speaker in the system for maximum audio clarity. While passive crossovers are installed between the speaker and amp, and may lead to volume loss and be hard to adjust, active crossovers filter the line signal from the stereo, allowing for a better-quality sound and ease of adjustment. A typical application for a three-way active crossover is in a car audio system, but they can also be found in professional public announcement rigs and home theater systems.

If you do not plan to adjust it much after initial install, keeping the crossover behind the dash panels is a good option. If you wish to have easier access to the crossover’s controls, install the unit near your amplifiers under a seat or in your trunk. Connect the outputs for each crossover band to the appropriate amplifier, i.

You are powering your bass shakers with an amp that has a built in crossover, like this one. You have a simple setup and your receiver crossover is doing it’s job OK. You are powering your bass shaker with a .

While some systems recommend 80Hz the standard THX setting for Select and Ultra2-based systems this is not always the best setting for all theater systems. Many times its easy to forget what a subwoofer is meant to do. It is meant to act like a subwoofer, not a woofer. The purpose of a subwoofer is to reproduce very low frequencies that most loudspeakers cannot reproduce with authority on their own.

Selecting the Right Crossover for Your System Selecting the right crossover for your system is a process that involves much listening and experimentation. Sometimes it can be easy such as when a loudspeaker manufacturer tells you where to set it and sometimes it can be more difficult. On systems that offer a flexible bass management system, shoot for setting the crossover frequency for at least 10Hz above the lowest frequency your main speakers can reproduce cleanly.

There are a whole host of caveats we have to mention here, and we recommend looking at our other articles dealing with loudspeaker setup and configuration. In essence, you are trying to attain a smooth transition from the lower capabilities of your main speakers to the subwoofer.

Subwoofer Crossover

Rev – 26 Dec Basics What exactly does the term “bi-amplification” and “tri-amplification” mean? It means that there are separate amplifiers to drive individual woofers, tweeters, and in the case of tri-amplification, midrange speakers. Why would anyone want to do this? There are lots of attractive advantages: Better overall sound quality.

So you’ve taken the leap and opted for separates, and now you’re wondering how to set up the power amp properly with you’re A/V preamp/processor. Relax, it’s not difficult at all. There are two types of connections on any power amp inputs that accept line-level signals from the preamp/processor and outputs that send the amplified signal to the speakers.

Woofer Horn tweeter Hooking up a crossover in a PA system requires all components to be separate. In a component system, crossovers are “active” rack mounted components, used to split sound frequencies for efficient and adjustable distribution to separate amplifiers and speakers. The use of dedicated amps and speakers for each frequency is called “bi-amping” or “tri-amping,” for two or three-way systems respectively.

In a simple bi-amped system run in mono, a single stereo power amp can be used by assigning one channel for low frequencies, and the other for high frequencies. Plug one end of a shielded input cable into the mixer’s main output, and the other end into the crossover’s input. Consult the owner’s manual of all components for specific details and recommendations.

Plug another shielded input cable into the crossover “high” frequency output, and the other into the crossover’s “low” frequency output.

Setting the Subwoofer / LFE Crossover for Best Performance

The input stage is biased so that the supply voltage is divided equally across the two complimentary output transistors which are slightly biased in conduction by the diodes between the bases. As the bias current increases, the voltage between the emitter and base decreases, thus reducing the conduction. Input impedance is about ohms and voltage gain is about 5 with an 8 ohm speaker attached.

Dec 28,  · REL subwoofer crossover question. I was told to hook up the left and right cable from the REL to the left and right 8ohm tap of the amp and the ground cable to the 4ohm tap. (and might actually be wrong) but somebody at a “boutique” hifi place told me that when hooking up the REL to a Class D amp you connect the 3rd wire to ground on.

Overall, I feel very confident in this purchase. Having played through many amps through the years, I’ve gotten to the point where hauling around a rig heavy enough to produce lots of sound Read complete review Overall, I feel very confident in this purchase. Having played through many amps through the years, I’ve gotten to the point where hauling around a rig heavy enough to produce lots of sound just doesn’t make sense anymore. The quality of the amplifier, combined with the extreme portability of the combo unit made this an easy, if not expensive, choice.

Given my limited experience with the amp, I’d venture that any situation outside of a small-to-medium sized venue would require the use of an extention cab.

Hooking up a passive sub woofer

Crap somewhere else, we have heard your opinion. This thread is about what people have found to be true. If you think wire matters, but disagree with another poster’s preference or findings, politely say that your experience was different, and state what YOU found to be true. This thread has no right or wrong. That goes two ways. I’m gathering data on some upcoming modification projects, many of which involve upgrading the internal wire of some of my components and speakers.

Well trying to hook up an aftermarket amp and subwoofer but I’m having problems. I originally spliced into my rear speaker wires to hookup to my converter and then from the converter to the amp. The problem is I think the rear speakers have crossovers so my sub isn’t playing bass.

In a perfect world, you could enjoy great sound by installing just four full-range speakers — one in each corner of your car. In the real world, things arent quite that easy. Full-ranges simply arent up to the task of accurately reproducing the entire music spectrum. Thats why top-notch systems employ two or more component speakers — like a woofer and tweeter — per channel. Each component is designed to reproduce a specific range of frequencies, and together they can cover the entire music spectrum accurately.

A complication arises, however, since source components such as CD players deliver all of these frequencies — low, high, and in between — as a single music signal. This is where crossovers come in. A crossover divides the music signal into frequency bands that are compatible with the different types of component speakers. Crossover Basics The crossover is a fairly complex creature, and it is imperative that you understand what it is and how it works before you make any decisions about how youll divide the signal in a high-end system.

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Class AB amps combine the good points of class A and B amps. They have the improved efficiency of class B amps and distortion performance that is a lot closer to that of a class A amp. With such amplifiers, distortion is worst when the signal is low, and generally lowest when the signal is just reaching the point of clipping. Class AB amps like class B use pairs of transistors, both of them being biased slightly ON so that the crossover distortion associated with Class B amps is largely eliminated.

Class C amps are never used for audio circuits.

you got a amplifier, 5 channels powered and a subwoofer signal(no amp) i bet you got a crossover in the sobwoofer signal path, just fiddle around in the menus of your amp and look.

I have a much better understanding of ohm cooking. I have two combo amps. One is a Fender Superchamp X2. The one speaker out jack that the internal speaker is connected to says Minimum 8 ohms. The other amp is a Vox AC10 with a speaker out jack of 16 ohm. I found the Bugera TS On the back it has a 4ohm mono jack and a 16ohm mono jack.

I know the Vox will work best through the 16 ohm mono jack. I think the Fender would work fine going to one of the jacks with the stereo switch engaged knowing that the output would only come through one of the speakers. I think… Could I reasonably connect the Minimum 8 ohm out from the Fender to one of the mono 4 or 16 ohm jacks.

How Do You Set Up an Active Crossover vs. a Passive?


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