Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email email@example.com
for a prompt reply.
Velleman Microphone Preamp Kit
Does this provide the 48V phantom power for the microphone?
Does this provide the 48V phantom power for an XLR microphone? Or is that something separate I have to get for the mic?
Using this will require a separate phantom power supply for your mic as this does not output phantom power. In fact, this requires it's own 10-30 volt power supply that is not provided with the kit. There are some microphone preamps here on PE that are reasonably priced and provide phantom power. The first one I list below is a small low cost single channel one that provides 21-30 volts of phantom power (this is usually plenty). The second one is a nice 2 mic set up that provides a full 48 volts of phantom power.Or, if you want to use this Velleman kit, you can find some DIY schematics for building your own phantom power supply with a little Googling.
Date published: 2013-03-19
The mic has batteries and is plugged into correct jack. . .any ideas???
I bought this type for use in my computer which does have a stereo input jack. The mic is powered by batteries instead of a mic jack power source. I contacted Tascam and they suggested a mic pre-amp. This surprised me since cheaper mics have better gain while this Tascam has to be yelled into. My question is. . .could this plate pre-amp work if I used two to maintain the stereo recording.Thanx in advance if you have a clue. I have also tried USB mics but I'm running Window XP Professional so it requires a driver and will not 'sense' a driver when a hardware device is plugged in.
This pre-amp should work fine as a pair. First, though, check the volume settings on your computer. If a cheaper, higher-gain microphone has been plugged in, the computer may have turned its own volume down to compensate.
Date published: 2013-02-16
Boosting electret microphone
would this product be suitable for boosting an electret microphone signal (3 ohms) to line level (10 ohms)? The speaker amp I am using is line level input only..
Yes this preamp will work for this application.
Date published: 2012-10-12
My Tascam TM ST1 Lacks Gain. . .
It is a stereo microphone I bought to use on my PC but I have to yell into it for it to pick up anything. Would this preamp work for such purposes and would I need 2?
first of all, you should be getting plenty of gain with your Tascam microphone. Make sure you have it plugged into the mic input of your computer (not the line input)...second of all, this mic requires a powered mic jack. It's possible you need to update your driver for the sound card in your computer. Try these fixes first.
Date published: 2013-02-14
Reccomed Power supply?
Hello.Can you recommend a power supply from Parts Express for this little guy? Thanks!
This amplifier requires a clean DC supply between 10 and 30V. The current draw is little enough that almost any DC supply that PE sells will work.
Date published: 2012-06-09
i have cell phone with week audio output would this work to get a stronger audio output
Do you mean to increase the volume of the audio line out before connecting it to an external amplifier or receiver, like using your phone to play MP3s on you home or car stereo? Maybe, but the stated maximum input voltage is 40 mV, and I am sure any phone with a headphone jack is putting out at least 1.5V. That's almost 40 times the maximum input voltage this says it can handle! However, it looks like one of the raters used it to boost the line out of his TV, and I would have the same expectations of that. It's also important to note that this will only handle one channel of audio, so to use it in the application that I think you are looking to use it for, you would need to buy two of these. If you did this, you would need to build both kits, make some custom interface cables, find an adequate power supply, wire that up, and then balance the two channels at an acceptable volume. Then you can use your stereo to change the volume, and not have to fuss with turning the pots on each board to change the volume.Also, remember these are not pre-built, they are kits that you will have to solder together. It sounds like for your purposes you may be better off just getting something like a Fiio headphone amp or Boostaroo.
Date published: 2012-10-23