cleonjr
Super Member
Ok I am going to be doing another amp Project it is going to be 2 TDA7492 BTL boards done in parelel,I have never tried any of the tube Preamps ,But I am interested. here is the amplifier http://www.ebay.com/itm/Class-D-TDA...118?pt=LH_DefaultDomain_0&hash=item51bb7100b6
Work on wide range of voltage :support 10~26V DC,2~4A
Biger rate of power ,RMS:50W/per channel in 8Ohm speaker,or 100W*1 in BTL model.and very Quiet back noise,you almost can not hear it.
With 4 model GAIN parts.can auto work on different voltage.
This amplifier using TDK inductance filiter output.it's HiFi parts.clean and without any noise output.without BOOM...big noise when turn amplifier.
STMicroelectronics TDA7492 chip.low price.but with big power and good sound quality outout,
PCB size:70*57mm
And Here are my 2 preamps I need to choose one they both look good to me but I have no experience. http://www.aliexpress.com/item/6N3-...-include-transformer-110V-220V/936035666.html 6N3 + 6Z4 tube valve preamp amplifier ZERO noise inclu transformer 110V/220V UK (Size:24.5 * 12.5 * 6CM),Weight:1.45KG,
It's a very good preamp.it's new design version.better sound quality and beauty exterior,easy assembling it.all Electronic component are using professional units.
1:Fully shielded transformer,and the High voltage filter capacitor using Original Philips BC capacitor.then you can get a pure power from tranformer.this is the basis for pure music output.
2:All resistance using solid core resistance,Safety at Higher Power Resistance builds up as current flows through a wire. that resistance causes heat, which increases as the amount of power increases. Too much heat can cause a fire. Braid-stranded wire carries more power with less heat due to a greater surface area.
3:Audiophiler MKP pro audio coupling capacitor.and nichicon filtering capacitance , be sure the pure music output.almost without any back noise,when you turn volume to MAX.just can listen a little noise floor.
i test it with my other headphone amplifier and power tube amplifier(if you're interested in those amplfier.you can check it in my store) .the sound is very clear,person vocal very warm with magnetic.like that singer just face to you.Sound of breathing distinguish very clearly.
4,About the input and output interface.all using GOLD RCA interface.
(any ways.sorry for my bad english),i think it's will not let you down.
else.becaue is tube preamp.usually the amplifier need warm time about 5-10 minutes,after can work in perfact status.
and the other one, http://www.aliexpress.com/item/6J1-6P1-High-End-headphone-preamplifier-HIFI/1761312458.html 6J1 6P1 High End headphone preamplifier HIFI
Description
The biggest highlight of this machine is that it uses a high-quality beef output resistance of the United States military regulations, the Japanese ruby, ELNA, BC series of high-quality capacitors, and Taiwan producing high-quality potentiometers.
only with bovine bile output tube amp amp can really reflect the taste, this machine is very low overall distortion, high signal to noise ratio, music, good sense. With the tube, hailed as classics by foreign adopted with the 6J1 +6 P1 (the machine uses military grade duct), sound gorgeous, IF dense, wide dynamic overload strong, and the tube at home easy to buy, maintain very convenient. The machine has intimate retreated Headphone Impedance transform switches can be used with 32Ω, 120Ω, 300Ω, 600Ω different impedance headphones, is AKG, Beyerdynamic such a good partner in the high-end headphones
Most significant feature of this machine is the same as before the class to use bile, a dedicated preamp output RCA interface with any type of after-class with the use of music to enhance a sense of the original system, and dynamic. Friends are made, Swans, MP, three Connaught, Walkman and other active speaker upgrade good partner.
This machine replayability is very high, I push through K501, DT231, HD595 HD600 results are very satisfactory.
Particularly worth mentioning is that this machine both can be used as headphone amplifier, but also as a former level, whether it is active home stereo or PC, is a good choice, forward-looking even better after the stone quality is excellent value for money DIY Fine.
Feature
orrent resister: AB DALE
SIZE: 165*105mm
Work on wide range of voltage :support 10~26V DC,2~4A
Biger rate of power ,RMS:50W/per channel in 8Ohm speaker,or 100W*1 in BTL model.and very Quiet back noise,you almost can not hear it.
With 4 model GAIN parts.can auto work on different voltage.
This amplifier using TDK inductance filiter output.it's HiFi parts.clean and without any noise output.without BOOM...big noise when turn amplifier.
STMicroelectronics TDA7492 chip.low price.but with big power and good sound quality outout,
PCB size:70*57mm
And Here are my 2 preamps I need to choose one they both look good to me but I have no experience. http://www.aliexpress.com/item/6N3-...-include-transformer-110V-220V/936035666.html 6N3 + 6Z4 tube valve preamp amplifier ZERO noise inclu transformer 110V/220V UK (Size:24.5 * 12.5 * 6CM),Weight:1.45KG,
It's a very good preamp.it's new design version.better sound quality and beauty exterior,easy assembling it.all Electronic component are using professional units.
1:Fully shielded transformer,and the High voltage filter capacitor using Original Philips BC capacitor.then you can get a pure power from tranformer.this is the basis for pure music output.
2:All resistance using solid core resistance,Safety at Higher Power Resistance builds up as current flows through a wire. that resistance causes heat, which increases as the amount of power increases. Too much heat can cause a fire. Braid-stranded wire carries more power with less heat due to a greater surface area.
3:Audiophiler MKP pro audio coupling capacitor.and nichicon filtering capacitance , be sure the pure music output.almost without any back noise,when you turn volume to MAX.just can listen a little noise floor.
i test it with my other headphone amplifier and power tube amplifier(if you're interested in those amplfier.you can check it in my store) .the sound is very clear,person vocal very warm with magnetic.like that singer just face to you.Sound of breathing distinguish very clearly.
4,About the input and output interface.all using GOLD RCA interface.
(any ways.sorry for my bad english),i think it's will not let you down.
else.becaue is tube preamp.usually the amplifier need warm time about 5-10 minutes,after can work in perfact status.
and the other one, http://www.aliexpress.com/item/6J1-6P1-High-End-headphone-preamplifier-HIFI/1761312458.html 6J1 6P1 High End headphone preamplifier HIFI
Description
The biggest highlight of this machine is that it uses a high-quality beef output resistance of the United States military regulations, the Japanese ruby, ELNA, BC series of high-quality capacitors, and Taiwan producing high-quality potentiometers.
only with bovine bile output tube amp amp can really reflect the taste, this machine is very low overall distortion, high signal to noise ratio, music, good sense. With the tube, hailed as classics by foreign adopted with the 6J1 +6 P1 (the machine uses military grade duct), sound gorgeous, IF dense, wide dynamic overload strong, and the tube at home easy to buy, maintain very convenient. The machine has intimate retreated Headphone Impedance transform switches can be used with 32Ω, 120Ω, 300Ω, 600Ω different impedance headphones, is AKG, Beyerdynamic such a good partner in the high-end headphones
Most significant feature of this machine is the same as before the class to use bile, a dedicated preamp output RCA interface with any type of after-class with the use of music to enhance a sense of the original system, and dynamic. Friends are made, Swans, MP, three Connaught, Walkman and other active speaker upgrade good partner.
This machine replayability is very high, I push through K501, DT231, HD595 HD600 results are very satisfactory.
Particularly worth mentioning is that this machine both can be used as headphone amplifier, but also as a former level, whether it is active home stereo or PC, is a good choice, forward-looking even better after the stone quality is excellent value for money DIY Fine.
Feature
orrent resister: AB DALE
SIZE: 165*105mm
. "only with bovine bile output tube amp amp can really reflect the taste". If nothing else, you're at least buying comedy gold 
