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Topic: Preamp

In the News (Fri 17 Feb 12)

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Iran

ANALYSIS

Pakistan

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	Preamp Productions
		Preamp Productions is an event planning company specializing in large scale events of all kinds.
		From community events open to the public, to trade events targeting a specific audience, we've got you covered.
		Choose Preamp Productions to plan your wedding, anniversary party, open house, or other private function.
	www.preamprod.com (129 words)

	Preamp: Buying Guide
		Originally, the mic and instrument preamps used in recording were built into the mix console; it was basically an "all in one" environment in which recording engineers placed their trust in the console builders.
		This often means a tube preamp with a "warm" midrange (caused by slight harmonic distortion that's a normal part of tube operation) and "smooth" high frequencies (a result of mild low pass filtering caused again by the tubes' performance).
		The reasons why one preamp would be more expensive than another are pretty much the same reasons one automobile is more costly than another; better parts, hand made, and sometimes, its desirability born of myth and legend.
	www.sweetwater.com /shop/studio/preamps/buying-guide.php (4482 words)

	T-Preamp TCC TC754 - 3 inputs preamp with MM phono stage - [English]
		I've discovered this little gem, a stereo preamp the size of a T-Amp, with 3 line level inputs and (hear hear!) a phono MM input, which can share the very same external power supply with the T-Amp!...all at a cost that won't disappoint you (90$ or 80 € if you prefer).
		It can be used as a minimalist preamp with a traditional power amp or partnered to a T-Amp, once you put the volume of the latter to its maximum.
		Indeed, the TC-754 is a very nice line-level preamp: perhaps not as refined as high-end gear, certainly harsher and less transparent but still on a par with basic preamps of audiophile fame.
	www.tnt-audio.com /ampli/t-preamp_e.html (2685 words)

	FET Preamp Cable
		A Preamp Cable is a phantom powered discrete FET (Field Effect Transistor) preamp built into the plug of a guitar cable.
		The Preamp Cable is "phantom powered", meaning that the power to drive the preamp circuitry shares the same wire (the same piece of copper) as the audio signal.
		Phantom powered preamps have been around for a very long time so the basic technology is not new, and this application is pretty much exactly what phantom power was designed for in the first place, but this specific implementation has some innovative details.
	www.till.com /articles/PreampCable (2439 words)

	LNK Receiver Preamp
		Unlike other FET preamps on the market, this one uses one of the new-generation, very-low-noise, dual-gate MOS FET's which are designed exclusively for use in the vhf and uhf bands.
		The preamp is connected in series between the antenna and the receiver to effectively lower the noise figure of the receiver front end, allowing weaker signals to be received.
		A preamp can help overcome a deficiency in receiver sensitivity only if the noise figure is poor, either due to the design or because a lossy filter or cable adds to the noise figure.
	www.hamtronics.com /lnk.htm (682 words)

	Bob's Vacuum Tube Phono Preamp (Site not responding. Last check: )
		This preamp design started out as a conventional three stage cascade with feedback RIAA equalization.
		The only problem I had now was a 6 x 8 void between the power transformers and the preamp tubes.
		The preamp tube filaments are fed with regulated DC.
	www.geocities.com /TimesSquare/1965/phono.html (1067 words)

	Preamp \| phono pre-amp \| stero preamps \| guitar tube preamps
		We stock phono preamps, mic preamps, tube preamps, stereo preamps, guitar preamps and many more!
		We, at Preamp, are continually adding new products.
		We have THE most complete lineup of Preamps available anywhere, as well as all other categories of music-related products.
	www.preamp.com (274 words)

	Re: My preamp coming out...
		I will try to install the preamp directly at the feed point and at the junction point of the 2 coax in a way to keep the preamp away of the vhf beam radiation.
		I just added this at 450 there is a TV station control studio link at 70KM.Without the preamp their signal was just barely audible when i switched the preamp the signal rise near S9.
		But as a "casual" satellite user the preamp in the shack do the job as on many low pass it was impossible to work SO-50.
	www.amsat.org /amsat/archive/amsat-bb/200603/msg00411.html (644 words)

	Preamp
		The Fodera Active Preamp Circuit is made from the finest components available. It was conceived by all the great players who are part of the Fodera family and designed by bassist Mike Pope.
		The preamp will, however,continue to draw a small current from the batteries, so it is best to unplug the bass when it not being played for a period of time.
		The preamp is powered by two nine volt batteries to give a total supply voltage of 18VDC. Current drain is extremely low allowing unusually long battery life. We have had reports of 6 months if the bass is not left plugged in when not being played.
	www.fodera.com /preamp.html (293 words)

	Preamp
		Speaker inputs are simpler to hook up, the speaker wires are cut and routed to the amp, which increases the signal and sends it back to the speaker through different wires.
		Preamp inputs are the best method when installing an amp, a pure un-amplified signal is sent from the head unit to the amp.
		Once removed several sets of wires are visible, the preamp wire is the only one on the side of the head unit.
	www.lehigh.edu /~cak7/Audio/Preamp.html (822 words)

	K&K Sound Preamplifiers - plus more Upright Bass, Guitar, Acoustic Musical Instrument Pickups, Preamps, Amplifiers, ...
		Designed as an all-purpose preamp for piezo and magnetic pickups, it can be used for many pre-amplification purposes.
		Designed as a preamp for piezo and magnetic pickups, it also can be used for any other pre-amplification purposes.
		Designed as a guitar preamp for the UltraPure Guitar piezo-based pickup system, it can be used for many other pre-amplification purposes including magnetic pickups, and virtually any instrument.
	www.urbbob.com /preamps.html (1751 words)

	SoundStage! Equipment Review - Blue Circle Audio CS Preamplifier (10/2002)
		Entry-level solid-state preamp with three inputs, tape loop, and one set of outputs -- all single ended; knobs are available in a number of finishes.
		The CS preamp has Blue Circle's distinctive backlit circular logo in the center of the faceplate and a toggle switch on the far right for turning the logo on and off.
		Not having a way to ground extraneous signals when the preamp and amp are on but not in use, short of unplugging the preamp, is somewhat worrisome.
	www.soundstage.com /revequip/bluecircle_cs_preamp.htm (1811 words)

	12AU7 Preamp
		The digital section of the preamp is an amalgamation of Basic Stamp projects (IR decoder, LCD display driver, relay control driver, etc..) pulled together from different sources on the internet.
		I need this because I use the preamp to drive two different amplifiers with different input sensitivities and it gives a wider control range for the main volume.
		In my preamp, they have plenty of detail but, are too bright for my system.
	mywebpages.comcast.net /gillespie147/12AU7-Preamp.html (1156 words)

	Preamp EQ Curves
		In these cases it may be useful to you to know the gain and frequency response of the preamp you are replacing or the one you are going to use in order to help you set up your system to preserve your previous tone or to improve specific aspects of that tone.
		The preamps measured are the Fishman Acoustic Matrix Natural preamp (the model previous to the current model, with a rectangular box rather than a tubular one), the LR Baggs iBeam active preamp, the B-Band Core99 preamp for their UST undersaddle pickup, and the B-Band 2150 preamp for their AST soundboard accelerometer pickup.
		The purpose of the buffer stage in onboard preamps is to eliminate the effects of this frequency dependence from the signal.
	www.museweb.com /ag/amp/pickups/preamp_eq.html (907 words)

	Selecting Mic Preamps
		You need to determine whether the microphone under worst-case conditions is going to overload the preamp input stage and whether the preamp is going to materially degrade the noise performance of the microphone.
		Final selection details involve checking that the preamp's gain range is enough for your use, that there are overload indicators or metering to help in set up, that the plumbing is compatible with your wiring needs, and that the color doesn't clash with your tour jacket.
		For example, if the mic's output noise translates into -120 dBu, and the preamp you are interested in has an EIN of -127 dBu, then the difference between the mic and the preamp is -7 dB, that is, the preamp is 7 dB quieter than the microphone.
	www.rane.com /note148.html (2844 words)

	Mesa/Boogie Quad Preamp
		The preamp is divided over two channels, the above one is modelled after a Mesa/Boogie Mark IIC and the lower channel is based on a Mark III.
		The tone pots control the sound prior to the distortion path, the 5 band graphics EQ is situated after the distortion path, enabling you to both change the character and the tone of the distortion.
		Besides the amazing quality of the preamp and the tubes used, lowering the gain to the minimum I need gives me more clarity, punch, less noise, etc. I just don't understand my people turn the gain all the way up, listen to the pro's and you'll notice that less is more.
	www.tubefreak.com /quad.htm (2340 words)

	High Quality Audio Preamp
		The original preamp (Project 02) shown on these project pages is basically a good design, but in the interests of improved quality and reduced "frills" this new version will fill or exceed most expectations.
		The second gain stage is almost identical to the first, with the main differences being the output capacitors, and the lack of an RF interference suppression cap and resistor.
		If the preamp is being used to drive an electronic crossover or power amps that already have an input cap, then the output caps may be omitted and replaced with a wire link.
	sound.westhost.com /project88.htm (2102 words)

	Studio Projects VTB-1 Tube Blend Mic Preamp and more Mic Pre-Amps at GuitarCenter.com.
		I did not find the preamp to be anything spectacular for any particular application but if you need a good all around preamp this may work for you.
		The preamp does provide a significant mount of noise free amplification but it did not seem to really make anything seem warm.
		On the bright side I found that the preamp did not seem to muddy up a mix after adding more than 12 tracks making this a handy tool to have in the studio.
	www.guitarcenter.com /shop/product/buy_studio_projects_vtb1_tube_blend_mic_preamp?full_sku=180360 (885 words)

	preamp
		Unlike the bulkier and expensive phono preamps of the past, these small devices allow you to move them easily and they fit in either a small space on your desktop or actually in your computer in a disk drive bay.
		Tracer has recently introduced a line of flat phono preamps that are affordable, offer excellent specs and deliver a perfectly flat signal to your sound card.
		This is a curve that compensates for the removal of certain frequencies during the pressing of records.
	www.enhancedaudio.com /preamp.htm (558 words)

	Low Noise Microphone Preamp
		One limitation is that it is not balanced, which is not a problem in a home recording environment, but will allow the mic lead (and case) to pick up noise with long cable runs or in a hostile environment.
		Figure 2 shows the resistor values needed to run the preamp from a 12V supply, but naturally the output voltage is dramatically reduced before clipping.
		It is also likely that although measurable distortion may be reduced, the preamp may lack musicality - that undefinable something that no-one has actually been able to quantify.
	sound.westhost.com /project13.htm (1135 words)

	Mic Preamp Insider
		Comparing preamps is no simple task, and Challenge Number 1 is simply assembling a number of units into the same time-space continuum.
		Choose a microphone, connect to the reference preamp and feed pink noise through a speaker -- placement between the two must be fixed and repeatable " and then measure the preamp with a digital meter such as the NTI Minilyzer using the Type-C response setting.
		EIN refers to the preamp's input circuit noise -- normally, the mic itself becomes part of the equation, but during the test, a 150-ohm resistor is typically substituted; its value must be published for this spec to be meaningful.
	mixonline.com /recording/applications/audio_mic_preamp_insider (2484 words)

	APHEX Systems 1788 Mic Preamp System
		While common mode signal can be present in a short line as well as a long line, there is a higher probability that there will be more common mode signal in the longer line, especially if that line is crossing power and lighting cables and a high RF field.
		While this provides some insurance against the preamp clipping, it causes a loss of noise performance and, in the case of digital, a loss of resolution.
		The main output on XLR is transformerless servo-balanced and the second output is tranformerless balanced on a DB25 multipin connector.
	www.aphex.com /1788.htm (1651 words)

	Mic Preamp Choices Under $300 - Web Audio Advisor
		A mic preamp is used to boost the signal level of your microphone so that you can record your voice.
		The Mobilepre mic preamp by M Audio (also known as Midiman), is a great addition to any home recording studio.
		Overall, the M Audio MobilePre mic preamp is a fine unit for anyone who needs to provide pre amplification to a professional microphone.
	www.webaudioadvisor.com /mic-preamp.html (1637 words)

	double bass pickup survey (Site not responding. Last check: )
		The DP has the preamp sepparate from the pickup, which can be mounted on the tailpiece of the bass, or sepparate from the instrument.
		The preamps is housed in a little bag of fl nylon, which mounts to the tailpiece.
		The preamp is attached to the strings between bridge and tailpiece, and runs with a small 3V cell battery.
	www.doublebassguide.com /4_pickups.html (3424 words)

	Preamp L10
		So the building of a further preamp will be a less complex work, because a lot of work is already done.
		When the preamp is split over different housings, there must be a cable with connectors between all the housings.
		There is a Linnenberg preamp which is nearly the same as I want to build.
	www.die-klaassens.de /Audio_und_Elektronik/Preamp_L10/preamp_l10.html (872 words)

	DIY Preamp (Site not responding. Last check: )
		You look over where the cabinet contains the preamp sitting three feet away and realize that jumpering that 8 pin preamp to power amp umbilical cord is going to be impossible and dangerous.
		What you need is a preamp sitting on your bench that can drive a power amp's phase inverter into clipping so that power amp stressing can be observed on your scope and that power can be measured at the on-set of clipping.
		A second function of this preamp design is that it can also be used to test preamp tubes.
	home.comcast.net /~priceamp/diypreamp.htm (535 words)

	Grado Phono Preamp, FEB03 AUDIOPHILE AUDITION
		The reason stems from my moving from separate audio and home theater setups to a single all-in-one system, and from a tubed “hairshirt” preamp with all sorts of phono preamp options to a complex AV surround preamp which has only a so so moving magnet input.
		According to the Grado folks the technical challenges of designing this preamp were the biggest undertaking they had ever engaged in.
		While I didn’t any longer have around the top-rated Linn Linto preamp, I felt my long-term memory was good enough to grok that my personal taste leaned toward the richer and warmer sound of the Grado preamp.
	www.audaud.com /audaud/FEB03/EQUIP/equip3FEB03.html (990 words)

	Do You NEED a Preamp? Plus more Upright Bass, Guitar, Acoustic Musical Instrument Pickups, Preamps, Amplifiers, and ...
		In most cases, the need for a "preamp" isn't because the pickup needs a boost -- it's a matter of matching the impedance of the pickup to the amplifier's input.
		Even with an amp that seems to handle the ultra-high impedance of a piezo pickup, I like the buffering/matching effect of a preamp, and I think in most cases they are necessary for the best and most realistic-sounding results.
		Parametric Equalizer Preamp - Take a preamp with three powerful bands of parametric equalizer, add a feedback killing 2-band notch filter that won't drastically alter your sound, and you've got the Equinox.
	www.gollihur.com /kkbass/preamptalk.html (1488 words)

	Eric Wallin's Internet Homepage
		I have been thinking about designing a preamp for speaker testing, something that would take one of those Panasonic electret capsules and amplify its signal up to a line level.
		Note that the pc board pad layout is asymmetrical, that there are more of the "single" holes on the lower half of the board as shown here (three in a row on the bottom, two in a row on the top).
		Here is a picture of the preamp with a short microphone plugged into the input, and a cable plugged into the output.
	mysite.verizon.net /tammie_eric/audio/preamp/preamp.html (2138 words)

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