This poll is for educative reasons only. Meant as part of a project on preamplifiers.
1.What do you define as "preamplifier"?
a. part of the reproduction chain
b. gain/attenuation stage
c. signal control stage
d. other multiple answers possible
2.How many inputs/sources should a preamplifier accept?
a. 1
b. 2
c. 3
d. 4
e. >4
3.How many channels should a preamplifier have?
a. ...1
b. 2
c. 5.1
d. other
4.Should a preampifier have an IR control?
a. yes
b. no
5.If yes, what should it control?
a. input selection
b. volume control
c. both
d. other
TECHNICAL STAGE
6.What are the specs a preamplifier should fulfill?
a. low distortion
b. drive ability / high current
c. high gain
d. high bandwidth
e.other multiple answers possible
7.What should, according to your opinion, the active devices be?
a. semiconductors - BJT
b. semiconductors - fet
c. opamps
d. tubes
e. hybrid if hybrid, refer to which combination
f. none of the above
8.If you were to build a preamplifier, which would be the design you would use?
(describe briefly)
For statistical reasons, please include your age, and, if possible, occupation. Thanks!!
1.What do you define as "preamplifier"?
a. part of the reproduction chain
b. gain/attenuation stage
c. signal control stage
d. other multiple answers possible
2.How many inputs/sources should a preamplifier accept?
a. 1
b. 2
c. 3
d. 4
e. >4
3.How many channels should a preamplifier have?
a. ...1
b. 2
c. 5.1
d. other
4.Should a preampifier have an IR control?
a. yes
b. no
5.If yes, what should it control?
a. input selection
b. volume control
c. both
d. other
TECHNICAL STAGE
6.What are the specs a preamplifier should fulfill?
a. low distortion
b. drive ability / high current
c. high gain
d. high bandwidth
e.other multiple answers possible
7.What should, according to your opinion, the active devices be?
a. semiconductors - BJT
b. semiconductors - fet
c. opamps
d. tubes
e. hybrid if hybrid, refer to which combination
f. none of the above
8.If you were to build a preamplifier, which would be the design you would use?
(describe briefly)
For statistical reasons, please include your age, and, if possible, occupation. Thanks!!
1.What do you define as "preamplifier"?
c. signal control stage
2.How many inputs/sources should a preamplifier accept?
d. 4
3.How many channels should a preamplifier have?
b. 2
4.Should a preampifier have an IR control?
a. yes
5.If yes, what should it control?
c. both
6.What are the specs a preamplifier should fulfill?
a. low distortion
d. high bandwidth
and lowest possible noise
7.What should, according to your opinion, the active devices be?
c. opamps
or d. tubes(depending on the ressources and on the target system)
8.If you were to build a preamplifier, which would be the design you would use?
Standard opamp design, with conventional volume control. A 3 band tone control would be integrated with a defeat switch.
18Y-Student in EE
c. signal control stage
2.How many inputs/sources should a preamplifier accept?
d. 4
3.How many channels should a preamplifier have?
b. 2
4.Should a preampifier have an IR control?
a. yes
5.If yes, what should it control?
c. both
6.What are the specs a preamplifier should fulfill?
a. low distortion
d. high bandwidth
and lowest possible noise
7.What should, according to your opinion, the active devices be?
c. opamps
or d. tubes(depending on the ressources and on the target system)
8.If you were to build a preamplifier, which would be the design you would use?
Standard opamp design, with conventional volume control. A 3 band tone control would be integrated with a defeat switch.
18Y-Student in EE
But I'm not a Pole, I'm a skippy
a, c
b: attenuation, minimum gain
often unnessesary.
e
b
yes, provided it doesn't sound worse than doing it manually.
a
d: mute, abs phase
a: yes
b: absolutely
c: absolutely not
d: a decade above the audio band is nice. More can present RFI problems in some instances.
d
What I've built
2 seperate phono stages (soon 3) -> selector -> TVC -> poweramp
4 line level -> selector -> TVC
Buffered line out (for recording)
5 in dog years
bum.
If you use any of this info for your commercial advantage, I expect to get paid.
costiss said:
a, c
b: attenuation, minimum gain
often unnessesary.
e
b
yes, provided it doesn't sound worse than doing it manually.
a
d: mute, abs phase
a: yes
b: absolutely
c: absolutely not
d: a decade above the audio band is nice. More can present RFI problems in some instances.
d
What I've built
2 seperate phono stages (soon 3) -> selector -> TVC -> poweramp
4 line level -> selector -> TVC
Buffered line out (for recording)
5 in dog years
bum.
If you use any of this info for your commercial advantage, I expect to get paid.
1. feels kind of unfair. No option for just amplification. Obviously, a preamp that is attenuating, not amplifying, is not an amplifier per se. (Sorry 'passive preamp' guys, it's true.)
2. As many as needed. You might only need one for gain, or ten for mixing multiple instruments together in a recording.
3. b., 2 channels; but this again depends on needs...
4. b. unnecessary IMO, but convienient if you want to put in the trouble.
5. c. (if something's worth doing, it's worth doing right!)
6. a.
7. d., but I'm biased
(c). should be acceptable in theory.
8. I covered this in a thread on the tubes forum (My Preamp). - Am awaiting pots so I can get on with the project.
Tim
2. As many as needed. You might only need one for gain, or ten for mixing multiple instruments together in a recording.
3. b., 2 channels; but this again depends on needs...
4. b. unnecessary IMO, but convienient if you want to put in the trouble.
5. c. (if something's worth doing, it's worth doing right!)
6. a.
7. d., but I'm biased
(c). should be acceptable in theory.8. I covered this in a thread on the tubes forum (My Preamp). - Am awaiting pots so I can get on with the project.
Tim
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