Difference between 9090db and 9090
- Thread starter TSWisla
- Start date
bobforapples
Angular banjos sound good
once the Dolby board is re-soldered the 9090db is pretty reliable, and both the 9090 and the 9090db have issues with the fusible resistors. The 9090db's are more desireable $-wise, and I've seen twice as many 9090dbs on flea-bay.
Comparisons:
No piont in the comparison. They are very close. If you play music loud, get the 9090db as it seems to handle the demands a little better than the 9090 (it is a little more power). The 9090db is also a little more quiet in between music tracks. The 9090 has a little hiss to it. From a technician standpoint, I would suggest the 9090 just because of the dolby issues with the 9090db.
No piont in the comparison. They are very close. If you play music loud, get the 9090db as it seems to handle the demands a little better than the 9090 (it is a little more power). The 9090db is also a little more quiet in between music tracks. The 9090 has a little hiss to it. From a technician standpoint, I would suggest the 9090 just because of the dolby issues with the 9090db.
Here we go again. The amplifiers in the 9090/8080 series and the 9090DB/8080DB series are completely different. Nothing is carried over, as Grateful has pointed out in an earlier post. Also, the DB models have a much more robust power supply with higher output transformers and much larger filter caps. There are other refinements as well.
The 9090 is a great receiver in it's own right and can often be had at bargain prices. But the DB models are definitely a step up.
- Pete
The 9090 is a great receiver in it's own right and can often be had at bargain prices. But the DB models are definitely a step up.
- Pete
CDFixer
Number 1 USC Trojan Fan
Here are all the differences that I know of in the two receivers
Tone and filter circuits, Identical on 8080/8080DB and 9090/9090DB, the 9090/9090DB versions have crossover selection switches on the tone board that the 8080/8080DB series do not have.
Dolby circuit only on the 8080/9090DB
Speaker selection 8080/9090 places the speakers in Parallel in A+B and A+C, the 8080/9090DB places them in series.
Tuner the 9090 has a noise canceller/multipath circuit incorporated in the tuner. the 8080 and 8080/9090DB receivers do not.
The 8080/9090 tuner lights are on only when the tuner is selected the 8080/9090DB they are on all the time. (Note the 8080/9090 can be modified to do this)
The 8080/9090 has one phono input, the 8080/9090DB has two.
The Amp section on the 8080/9090DBs is more robust, using a standard NPN/PNP complementary Push/pull amplifier. The 8080/9090 use a quasi complementary NPN only amplifier
The power supply on the 8080/9090DB is larger and has a much higher current capability. The filter caps on the 8080/9090 are 6700UF on the 8080/9090DB they are 12000UF.
The 8080/9090DB have two pre-out jacks, the 8080/9090 only one.
Tone and filter circuits, Identical on 8080/8080DB and 9090/9090DB, the 9090/9090DB versions have crossover selection switches on the tone board that the 8080/8080DB series do not have.
Dolby circuit only on the 8080/9090DB
Speaker selection 8080/9090 places the speakers in Parallel in A+B and A+C, the 8080/9090DB places them in series.
Tuner the 9090 has a noise canceller/multipath circuit incorporated in the tuner. the 8080 and 8080/9090DB receivers do not.
The 8080/9090 tuner lights are on only when the tuner is selected the 8080/9090DB they are on all the time. (Note the 8080/9090 can be modified to do this)
The 8080/9090 has one phono input, the 8080/9090DB has two.
The Amp section on the 8080/9090DBs is more robust, using a standard NPN/PNP complementary Push/pull amplifier. The 8080/9090 use a quasi complementary NPN only amplifier
The power supply on the 8080/9090DB is larger and has a much higher current capability. The filter caps on the 8080/9090 are 6700UF on the 8080/9090DB they are 12000UF.
The 8080/9090DB have two pre-out jacks, the 8080/9090 only one.
I'm aware of the differences, "sound" differences, to me, are what I was talking about. Jeez guys! LOL! I prefer the sound of a 9090 over a 9090db. It just sounds good to my ears. I have very sensitive speaks though. The 9090db used to be a fav of mine, but since I have gotten a few of the g-x700 receivers, it just does'nt sound as good as it used to. This is, of cource, my op.
nosirrah
RIP 11-19-2019
Sticky's
I agree it's a common question, and well answered here.
What say ye all?
The benefit is it can be referred to when another post comes in, because few ever read the sticky notes or do a search, the negative is that if we get too many stickys up there it detracts from the size of page one of the forum...
Opinions?
An update, we presently have more stickys on our front page than any other of the namebrands forums....
Casey:scratch2:
I agree it's a common question, and well answered here.
What say ye all?
The benefit is it can be referred to when another post comes in, because few ever read the sticky notes or do a search, the negative is that if we get too many stickys up there it detracts from the size of page one of the forum...
Opinions?
An update, we presently have more stickys on our front page than any other of the namebrands forums....
Casey:scratch2:
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My op is to leave it be. If not the differences in the 9090 or 9090db it will be something else. Not to hard to answer and give opinions. Also, new people = new opinions! That's what it's all about eh?
The physical and electrical difference. I guess that's all this thread was about. OOPS!!
