Hot answers tagged amplifiers
7
I would try cleaning it first with a non-residue, non-conductive contact cleaner. DeOxIt is the most widely recommended spray.
Here's a good read (with pics!) by someone with a similar problem.
6
Teneff,
tl;dr you can run your 6Ohm speakers fine with the receiver with out any concerns. You won't damage the speaker or the amp. If you drive the amp too hard for too long, it will simply shut down to protect itself and cool off.
Technical details:
Loudspeakers impedance rating are nominal, i.e. they pick a single number for the impedance that is ...
4
I'm going to suggest you take these units in to a proper electronics service center and have them checked out by someone who troubleshoots this sort of stuff on a day-to-day basis. Normally I'd be all for going it DIY but you're dealing with high powered electronics. There is no room for error here. If you screw this up the result could very well be death.
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4
The gain pot does itself (more or less) exactly the same thing as a volume pot, with one important difference: it's located at the very front-end of the circuitry. So it does not only control the output level, but more so the level the signal will have in the circuit. This may not seem necessary as most amplifier circuits are (more or less) designed to work ...
4
The best bang for your buck will be to make it yourself: buy a good brand of plugs (neutrik, switchcraft, etc) from Markertek or equivalent and use plain old 2-conductor AC extension cord for the cabling. Banana plugs or Speakon are preferable to 1/4" but not terribly common in guitar rigs.
Make the cable as short as possible, but not too short!
3
Do you mean you want to edit each file to increase it's volume, or you just want to play them all back at high volume?
If the latter, just set the volume in your playback tool of choice to its maximum and play the entire list.
If however you want to increase the volume of each file you can use Audacity's normalisation function:
Go to File > Edit Chains
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3
If the equipment is grounded, this could be a ground loop. (If you're using AC power and three-prong plugs, the third prong is the ground.) Try plugging the amp into a different outlet, one that's on a different circuit. They make ground loop isolators, but I don't know if they work or not; it might be worth investigating.
(I've used three-to-two-prong ...
3
According to the Amazon link you provided for the Decibel Meter, the inputs are line level. This means that you will need to hook up the meter directly to the Mixer as in your first and second diagrams. If you hook up the meter between the amp and the speakers bad things are likely to happen.
Since the mixer only has unbalanced output, hooking the decibel ...
3
Your question contains part of the answer: eliminate the speakers as a factor by trying headphones, or by connecting the current right speaker to the left channel and so on to see if the imbalance follows the speakers. If they're not the problem, do all inputs to the amp show the same effect? If so, it's very likely the amp.
If there's only one input and ...
2
If you have a multimeter finding out the resistance value of the potentiometer is trivial. Simply hook one lead to the left, or input lug, and another lead to the middle, or sweeper lug. Set your meter to ohms (resistance) and measure it out. I'm guessing it's likely a 10k like @jlebre mentions.
Once you know the resistance value for the potentiometer, next ...
2
Chances are it'll be something like A10k, or A14. That means it's a log pot, 10k resistance, or 1+4(zeros) resistance, or something similar. On older equipment, A will be linear though, and C would be log. Also some pots do say Lin or Log.
You would be looking for a single gang, single turn rotary potentiometer.
If you live in the uk, and use places like ...
2
We use EML on our SSL parts. In addition to cleaning contacts, it also lubes the whole mechanism. I use DeOxit mainly to clean faders and then apply the deoxit lube on the fader rail (for instance, your D-Command Penny-Gilles).
Never tried DeOxit on knobs before maybe because of the lack of self built lube, and the fact that the spray actually helps the ...
2
The ART SLA4 should meet your needs. Not the cheapest amp around, but it fits in one rack unit and is of high quality.
If that is too expensive for you, just plug in whatever amps you like that aren't. You don't need to run all four channels in one amp.
2
This is not a good idea. It may not blow up your system, but it certainly isn't the optimal setup, and I'm sure it voids the warranty (if you admit to doing it).
Each output is looking for an 8 ohm load; you should really avoid going under the minimum. Here's an article that may help:
http://www.prestonelectronics.com/audio/Impedance.htm
2
This could be a potential answer to you question.
I was told one of the major reasons for balanced cables (note most guitar cables are unbalanced), is to prevent interference. Most notable is that of radio transmissions being picked up. The length of the cable relates to the frequency it will pickup, though your amp, or pickups could also pick up the ...
2
The good thing is that style of music is not necessarily that important. Generally (and this is a generalisation) you want your PA to provide amplification without affecting the sound, with EQ to carry out tweaks to compensate for the frequency response of the venue. Any effects on instruments or vocals should be carried out using processors separate to ...
2
The most common use for a headphone amp is to feed multiple sets of headphones from a single headphone socket. They can also provide some amplification if your original headphone out signal is too weak.
See this Sound on Sound article from Martin Walker for a helpful explanation of when you might need a headphone amplifier. Also, check the Wikipedia ...
2
Yes, you can. Close-up from the 360° view:
Where you can see the switch between stereo (STE), parallel and bridged. The specifications in this mode are 380W @ 8Ω / 240W @ 16Ω. You can't operate it safely on 4Ω in that mode. (Probably, the shortcut protection would just shut it down.)
2
I've always found a contact cleaner, such as plastic-safe DeoxIT, works wonders for these types of connections. I normally spritz some on the plug itself, then work the plug in and out of the port a few times, spritz again, remove excess, plug in and go.
1
If you are just using the normal output of the computer system, then you are sending too much signal to the amplifier: the computer is adding gain to the audio signal and then the amplifier is re-amplifying it.
This is essentially how distortion pedals work for guitars: they add gain before the primary amplifier.
Adjust the volume downwards on the ...
1
There are a number of reports of the volume lock getting turned on on the iPod nano. This is a "feature" that limits the output volume to save little ears.
I don't know which nano you have, but somewhere in the neighborhood of Settings>>Playback>>Volume Limits
Alternatively, you can always try resetting your nano to factory. Method depends on your model.
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1
Here is a site with lots of different amps.
http://www.headphone.com/headphone-amps/amplifiers.php
I don't have any of these, but I have used the site before and they are quite particular about good sound. I'm guessing this could help you. As with anything, I recommend you read reviews and buy the best amp in your price range. This may not be the most ...
1
I see no reason why it shouldn't work fine. Modern amplifiers of that power range don't produce that much heat anymore, can work at pretty high temperatures and automatically switch off when it gets too hot, so you can definitely give it a try. But the enclosing should be a good thermal conductor, aluminium is a good bet.
If you'd like the encasing as small ...
1
While you should use a cable designed for the job, this is not because using an instrument cable will damage speakers or the amp, but because an instrument cable is designed for low noise and low current, a speaker cable may have significant current going through it so needs to be able to cope with high power.
(Actually, I guess if the cable does melt, a ...
1
I would guess it's because the internals of the TV don't link the audio input from the HDMI lead to the RCA output. This is because it would require another DAC which most people wouldn't use. As an example on my Samsung the RCA out will output TV, and any audio input on the scart sockets, but it won't give me audio from the HDMI input.
The easiest way to ...
1
If the extra noise is happening when you are playing the keyboard, make sure the Overdrive is turned off. Also, try plugging your guitar into the amp and see if it does the same thing.
If the extra noise is happening when you are not playing the keyboard, unplug the keyboard and see if it stops. Also, try adjusting all the knobs to see if anything ...
1
It's a dynamic mic, so you don't need the phantom power switch on your preamp, but it might be worth trying the 20dB boost button.
Are you sure the on/off switch on the microphone is on? (a common mistake)
Do you have anything else you can try plugging into your preamp (e.g. a guitar).
Was the preamp bought new? It contains a tube, which can break.
1
In my experience most mp3 players have a very low output to begin with. For the cable distances you are talking about you will definitely need some sort of preamp to drive the speakers at any reasonable volume.
As for distributing the signal to the different sets of speakers, you could simply get several headphone splitters, or possibly a headphone amp ...
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