i always look all the best amplifier 😀
From Aleph, AKSA, Audiosector, Aussie, BPA300,
Bora, DX, JLH, Krell, Leach, Symasym, To Quasy.
ECT
Theres a lot best solidstate amplifier for DIY
But i just saw bride of son of zen (Aleph 1.7)
But where the DIY Active Preamp ?
Is anybody can build this Preamp ?
Is difficult to make hi end Preamp ?
From Aleph, AKSA, Audiosector, Aussie, BPA300,
Bora, DX, JLH, Krell, Leach, Symasym, To Quasy.
ECT
Theres a lot best solidstate amplifier for DIY
But i just saw bride of son of zen (Aleph 1.7)
But where the DIY Active Preamp ?
Is anybody can build this Preamp ?
Is difficult to make hi end Preamp ?
The difficulty is getting everyone to agree.
gain or no gain.
active or passive.
chip or discrete.
balanced or unbalanced.
switched, wiped, solid state or led volume control.
switched, solid state, relay or reed source selection.
RCA, BNC, XLR or DIN connectors.
tone control or not.
channel balance, mono switch, stereo or multichannel.
Start computing the permutations and there is a different combination for every member of the Forum.
gain or no gain.
active or passive.
chip or discrete.
balanced or unbalanced.
switched, wiped, solid state or led volume control.
switched, solid state, relay or reed source selection.
RCA, BNC, XLR or DIN connectors.
tone control or not.
channel balance, mono switch, stereo or multichannel.
Start computing the permutations and there is a different combination for every member of the Forum.
Hi jeffry,
I think Andrew is right. To design and build is not so difficult, but everyone has different requirements.
I think Andrew is right. To design and build is not so difficult, but everyone has different requirements.
gain or no gain.
active or passive.
chip or discrete.
balanced or unbalanced.
switched, wiped, solid state or led volume control.
switched, solid state, relay or reed source selection.
RCA, BNC, XLR or DIN connectors.
tone control or not.
channel balance, mono switch, stereo or multichannel.
to add to the list:
voltage feedback, current feedback
no global feedback, global feedback
low impedance pot, high impedance pots
jfet , bipolar
pcb, point to point wiring
simple pre-amp , complex pre-amp
battery, mains supply
ARGHHHH~~~~~~~
active or passive.
chip or discrete.
balanced or unbalanced.
switched, wiped, solid state or led volume control.
switched, solid state, relay or reed source selection.
RCA, BNC, XLR or DIN connectors.
tone control or not.
channel balance, mono switch, stereo or multichannel.
to add to the list:
voltage feedback, current feedback
no global feedback, global feedback
low impedance pot, high impedance pots
jfet , bipolar
pcb, point to point wiring
simple pre-amp , complex pre-amp
battery, mains supply
ARGHHHH~~~~~~~
jeffry_widjaja said:
What is difficult and what is high end ?
I've started putting together a preamp design that has 300 active devices, 250 capacitors and 600 resistors in the amplification sections alone.
Likely very high-end, but do you care to do the same ?
Hi Jeffry,
I guess a true high end" preamp is one that sounds very good to many people who are familiar with this class of product, and has reasonable specifications. I would expect the finish to be presentable.
Can you build one? Probably. You just need to set your priorities and build it some how. An existing design is fair game.
Hey Jacco!,
-Chris 😉
I guess a true high end" preamp is one that sounds very good to many people who are familiar with this class of product, and has reasonable specifications. I would expect the finish to be presentable.
Can you build one? Probably. You just need to set your priorities and build it some how. An existing design is fair game.
Hey Jacco!,
You're smuggling parts again, aren't you!
-Chris 😉
Diy Solid State Preamp
Jacco
Any Stereo preamp that has 300 active devices,250 capacitors, and 600 resistors in the amplification section alone,
(unless of course, you are being facetious, and counting the internal bits inside a few integrated circuits !) is sure to be high end in price only.
I would have thought that you subscribed to the K.I.S.S. principle ? Smacks a bit of Dinosaurs and pink pigs , aimed squarely at some forum members!
Regards
SandyK
P.S. Sincere apologies in the unlikely event that you are being deadly serious.
Jacco
Any Stereo preamp that has 300 active devices,250 capacitors, and 600 resistors in the amplification section alone,
(unless of course, you are being facetious, and counting the internal bits inside a few integrated circuits !) is sure to be high end in price only.
I would have thought that you subscribed to the K.I.S.S. principle ? Smacks a bit of Dinosaurs and pink pigs , aimed squarely at some forum members!
Regards
SandyK
P.S. Sincere apologies in the unlikely event that you are being deadly serious.
Hello sir,
I remember a PMA project called Dispre. Full of his favorites BJT.
diyAudio thread :
http://www.diyaudio.com/forums/showthread.php?s=&threadid=64843
BOM :
http://www.kubusmaximus.com/symasym/dokuwiki-2006-11-06/doku.php?id=dispre
The last one :
http://www.holgerbarske.com/news/index.php?shownews=209
If you can get DPA-111 schematic, send me a copy 😎
-----
EDIT : I've forgotten the schematics
I remember a PMA project called Dispre. Full of his favorites BJT.
diyAudio thread :
http://www.diyaudio.com/forums/showthread.php?s=&threadid=64843
BOM :
http://www.kubusmaximus.com/symasym/dokuwiki-2006-11-06/doku.php?id=dispre
The last one :
http://www.holgerbarske.com/news/index.php?shownews=209
If you can get DPA-111 schematic, send me a copy 😎
-----
EDIT : I've forgotten the schematics
Don't, it is over the top.
Its predecessor employed 16 transistors and LED current sources in each opamp board.
In the 2nd ed., the LEDs have been exchanged by BJT current sources, more than doubling the number of Q's.
Advantage is that this pre-amp design will drive anything on this planet, and with an OL bandwidth that is above 20KHz.
In professional terms a dinosaur/dinausor indeed, such a design has likely become way too expensive for serial manufacture, unless it's a limited edition with JC engraving.
These boards will go in a milled case similar to that of the CTC.
Its predecessor employed 16 transistors and LED current sources in each opamp board.
In the 2nd ed., the LEDs have been exchanged by BJT current sources, more than doubling the number of Q's.
Advantage is that this pre-amp design will drive anything on this planet, and with an OL bandwidth that is above 20KHz.
In professional terms a dinosaur/dinausor indeed, such a design has likely become way too expensive for serial manufacture, unless it's a limited edition with JC engraving.
These boards will go in a milled case similar to that of the CTC.
Hi Jacco,
250 Caps, 600 resistor...... wow
Are you already build your MONSTER pre amp?
How much cost for build those monster?
I think it will be deliver wonderful sound.
Cheers 😉
250 Caps, 600 resistor...... wow
Are you already build your MONSTER pre amp?
How much cost for build those monster?
I think it will be deliver wonderful sound.
Cheers 😉
This is the great thread
The simple way is what the basic need of preamp
for the buyer ( For drive two speaker only )
- Active Preamp,
- Discrete
- Good Sound Quality
- Volume Control ( with Remote will be the best )
- Minimum with RCA output and some RCA Input
For this the answer just good sound quality
Well, Jacco Vermeulen has one answer for this.
Wooow, posting with real PCB ... Nice Job JC
PMA has start with his concept in this forum too
http://www.diyaudio.com/forums/show...&threadid=64843
Another DIYER enlightment ?
AndrewT said:
The simple way is what the basic need of preamp
for the buyer ( For drive two speaker only )
- Active Preamp,
- Discrete
- Good Sound Quality
- Volume Control ( with Remote will be the best )
- Minimum with RCA output and some RCA Input
Hartono said:to add to the list:
voltage feedback, current feedback
no global feedback, global feedback
low impedance pot, high impedance pots
jfet , bipolar
pcb, point to point wiring
simple pre-amp , complex pre-amp
battery, mains supply
ARGHHHH~~~~~~~
For this the answer just good sound quality
Well, Jacco Vermeulen has one answer for this.
Wooow, posting with real PCB ... Nice Job JC
PMA has start with his concept in this forum too
http://www.diyaudio.com/forums/show...&threadid=64843
Another DIYER enlightment ?
One of the other big drivers in choosing what to put in a preamp is what other stuff it needs to connect to.
Some really basic questions:
1) What sources do you have?
2) What power amp(s) do you want to drive?
3) Do you have recording devices?
Then there are some practical questions:
1) Budget
2) Experience
3) Listening room constraints - do you need to drive long cables etc?
4) Do you need remote control?
Some really basic questions:
1) What sources do you have?
2) What power amp(s) do you want to drive?
3) Do you have recording devices?
Then there are some practical questions:
1) Budget
2) Experience
3) Listening room constraints - do you need to drive long cables etc?
4) Do you need remote control?
PREAMP ANSWER
FROM PRACTICAL TO BASIC
This is just my opinion,
I want to hear another opinion too
Budget
US $ 100 - For CD Only
US $ 200 - For CD with Remote
US $ 250 - For CD & MULTIMEDIA
US $ 500 - For CD & Phono
For the cable drive maybe 2.5 meter Max
Drive Solid State Amplifier like i mention in
first page
Cheers
FROM PRACTICAL TO BASIC
This is just my opinion,
I want to hear another opinion too
Budget
US $ 100 - For CD Only
US $ 200 - For CD with Remote
US $ 250 - For CD & MULTIMEDIA
US $ 500 - For CD & Phono
For the cable drive maybe 2.5 meter Max
Drive Solid State Amplifier like i mention in
first page
Cheers
Build DIY Preamp
Must be someone make this thread for me 😉
As i know, he decide to mods preamp because
there is no preamp build by DIY that time
I look for good preamp hi end sound quality
it is better if the preamp can drive with remote
so i can control the volume, still sit down
and eat my popcorn
crouch ... crouch ... crouch
Must be someone make this thread for me 😉
As i know, he decide to mods preamp because
there is no preamp build by DIY that time
I look for good preamp hi end sound quality
it is better if the preamp can drive with remote
so i can control the volume, still sit down
and eat my popcorn
crouch ... crouch ... crouch
I guess many of those preamps have been designed, built, published, shared. The difficulty is for somebody to find the right one with the "high-end" sound.
Actually, I am in the same boat. I built a 12B4A tube preamp with a gain about 3 (without cathod bypass) and found it superb. It was so good that it compared favourably with all other tube preamps it compared to, including an Audio Research preamp.
But it was difficult to build, comparatively expensive, and heavy. In those days, while my equipment was less than ideal, a tube preamp did sound better.
Now my equipment has been improved, mainly consisting of much lower distortion equipment, so I am very interested in how a simple SS preamp, perhaps even a single OPA627 opamp, would compare to the 12B4A preamp.
In theory, the distortion in the opamps is so low that it should sound better than anything else. In a tube preamp, the output caps or transformer would give higher distortions than an opamp preamp without them.
I designed and built my active XOs and am interested in adding only a small SS circuit into my XO box and eliminate a big, heavy preamp box, if it sounds as good.
Bill
Actually, I am in the same boat. I built a 12B4A tube preamp with a gain about 3 (without cathod bypass) and found it superb. It was so good that it compared favourably with all other tube preamps it compared to, including an Audio Research preamp.
But it was difficult to build, comparatively expensive, and heavy. In those days, while my equipment was less than ideal, a tube preamp did sound better.
Now my equipment has been improved, mainly consisting of much lower distortion equipment, so I am very interested in how a simple SS preamp, perhaps even a single OPA627 opamp, would compare to the 12B4A preamp.
In theory, the distortion in the opamps is so low that it should sound better than anything else. In a tube preamp, the output caps or transformer would give higher distortions than an opamp preamp without them.
I designed and built my active XOs and am interested in adding only a small SS circuit into my XO box and eliminate a big, heavy preamp box, if it sounds as good.
Bill
Hi Bill,
The other issue. There is always that undefined quality that measurements haven't caught up with. Otherwise it would be a simple matter to mass produce "perfect" components cheaply.
The search continues.
-Chris
That is the problem. The execution of a circuit is generally where you run into problems where the devices deliver less than their full potential.
The other issue. There is always that undefined quality that measurements haven't caught up with. Otherwise it would be a simple matter to mass produce "perfect" components cheaply.
The search continues.
-Chris
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