How to set pre-amp to avoid noise?



Asked by: Brandon Dunnigan

Does a preamp reduce noise?





Preamp Noise



Well, in most cases less than you’d expect. Usual studio grade preamps add around 3–6 dB of noise. But there are some ultra low noise preamps that contribute less than 1 dB of additional noise. Preamp data sheets rarely specify the noise figure (i.e. the amount of noise added).

Does preamp increase noise?

Conclusion. The sound contribution of preamps is not so much in its frequency response but in the texture it imparts on the sound. However, a preamp shapes the sound to a much lesser degree than one would think. Usually, its sound character only becomes obvious at high gain settings or when you drive it into distortion

How do you set a preamp?

Turn down the gain control on your preamp. If you still hear distortion, make sure your preamp doesn’t clip. Engage your preamp’s pad switch to attenuate the signal before it hits the preamp’s input stage. If you’re sure neither your converters nor your preamp distorts, engage the pad switch on your microphone.

How do you set the gain on a preamp?

Well it's easy you simply set your gain. So that your recording level peaks around -18 to -12 dbfs. With this rule of thumb you ensure that you record a strong signal.

How do you use a preamp on an amp?





Steps for Connecting a Preamp to a Receiver

  1. Turn Everything Off. …
  2. Plug Your Audio Device(s) into Your Preamp. …
  3. Plug Your Preamp into the Receiver. …
  4. Turn Your Preamp On and Lower the Volume All the Way Down. …
  5. Turn on the Receiver and Adjust the Preamp’s Volume. …
  6. Adjust the Preamp’s Gain.


Do preamps really make a difference?

A high quality microphone preamp, however, will do much more than just make your mic level louder. It will deliver a cleaner, more accurate signal, with higher gain, lower noise, less distortion, and more headroom.

What makes a good preamplifier?

High-end preamps typically have more headroom than budget designs, which often translates into less distortion and a more ‘open’, ‘effortless’ sound character. A high-end preamp might have a maximum output capability of +32 or even +36 dBu, whereas a budget one might manage only +16dBu.

What is the purpose of a pre amp?

In a home theatre system, the pre-amplifier performs two main functions: it handles switching between different line level sources and boosts the signal before sending it to the amplifier. A weak electrical signal becomes strong enough for additional processing, preventing noise and offering cleaner output.



What is a good SNR for preamp?

It is generally considered that a good signal to noise ratio is 60 dB or more for a phono turntable, 90 dB or more for an amplifier or CD player, 100 dB or more for a preamp.

What should my preamp be set at?

A setting of 60-80 Hz is a good setting for the male voice and 100-120 Hz is good for the female voice. A fully featured mic preamp has pad and polarity switches as well as variable input impedance. This switch does not affect the sound, it only inverts the signal polarity.

Should my gain be high or low?

From the Total Bithead website: “Use the low gain setting (the position where the volume is lower) unless it won’t get loud enough for you.” And slightly increased volume will always sound better; a slight, even 0.1dB, volume increase will be perceived not as being louder but as having more clarity, detail, etc.



What should my gain be set at?

Turn the stereo up to 2/3 the max volume.



This is the best range to use when setting gain because you avoid overworking the stereo head. If you overwork the stereo head you could end up sending distorted sounds to your amplifier.

How do I match my amp and preamp?

So the one you want to look at is what's it take on the input to produce a full output wattage on your power amplifier.

Do you need both preamp and amp?

Yes, you need both.



A preamp doesn’t have the power to drive a speaker; a power amp is needed for that. A power amp expects a signal at line level; a preamp is needed for that. You could technically go from a preamp, straight to active speakers without an external dedicated power amp.

How do you use a preamp with a receiver?

And use the amplifier. Board in the marantz. You're now going to use the same colors on the marantz but you're going into pre-out to use the amplifier.



Do I need a preamp if I have a receiver?

You do not need a phono preamp if your receiver has a phono input. The same goes if your record player has an internal preamp. But that does not mean you shouldn’t get one. In most cases, the phono preamplifiers included in receivers or turntables are low quality.

What does a preamp do for home audio?

(PREAMPlifier) Meaning “before the amp,” the preamp is the primary control unit in a stereo or home theater system. It switches low-level signals from audio and video sources to the audio amplifiers, which boost the preamp output sufficiently to drive the speakers. The preamp always includes the volume control.

Is tape out the same as preamp out?

In principle, the Tape-out is just looped from the input signal, while the pre-out goes through the whole pre-amp stage of the amplifier, so you would be dependent on the quality of the pre-amp.

How do you use pre out?

Pre-out is where you connect an external power amplifier in the place of the built-in one integrated in the receiver.



How do you test a preamp output?

You can use one of the online sine wave generators or an mp3 sine wave sample of 400Hz. Just play it through your pre-amp and measure the output level with the multimeter set to measure AC voltage. This should give you an accurate measure of the output levels of both channels.