alexberger

Responses from alexberger

SET the best?
Hi @mozartfan , 845 tube needs ~10KOhm output transformer that has more narrow bandwidth compared to 3.5K transformer for 300B, 5K transformer for 45 or 2.5K transformer for 2A3 tube.  So, if you have high sensitive speakers in a small room I do... 
If a " system " cannot do this, I move on........
Hi @mrdecibel , Yes it is very important point you are talking about. The system which help you feel interpretation. But sadly most of audiophiles don’t care about it as well about natural instruments tone. Probably, because that, low sensitive... 
SET the best?
One of the first versions of Altec 604 from 40x.    
SET the best?
I want to add vintage speakers to the list, like: Altecs - VOT A5 A7, 19, Valencia, 604. Old Tannoy - Silver, Red. Old JBL L200. Used full range: Lowther, Klangfilm, Telefunken.   New full range drivers like: Audio Nirvana, Lowther, Fostex,... 
SET the best?
Hi @ron1264 , I'm not an expertise in Class D amplifiers. But all of them digital and PWM are very different from SET. For example, most of SET fans use high sensitive speakers like: horns or full range drivers. And they like these speakers not... 
SET the best?
As ASIC chip designer I can add. For any chip production you need to produce millions of chips of this particular model. Otherwise you will lose a lot of money. For example, companies like Chord who made FPGA based DACs use FPGA for their custom D... 
SET the best?
For me looks very weird that someone who was SET fan suddenly became digital amplifier fan. I can't say that SET are better or worth than digital amplifiers. But they are so different. These amplifiers topologies work best for completely different... 
Top resistors
I built n-1500 crossover for Altec 604E. DIY Altec N1500A (audioheritage.org) I use constant resistors instead of potentiometers 36 Ohm and 7.5 Ohm. I also use resistors 1.2 Ohm - 1.8 Ohm for super tweeter crossover. I tried Duelund Regular and... 
Horn speakers are really bright?
Here is a video with a new DIY n-1500 crossover:    
Acoustic Sounds Series
Mingus Mingus Mingus Mingus Mingus    
SET the best?
SET roll off highs ? My SET has bandwidth -3db from 7 Hertz to 95K Hertz.   
SET the best?
I'am agreed it is not good idea to use full range speakers in parallel with tweeter. Tweeters shouldn't play anything below 10KHz. That is the reason why most of famous producers like JBL, Harbeth, Tannoy use super tweeters with 3rd order high f... 
Horn speakers are really bright?
Hi @unreceivedogma, I use Altec 604E with original and Werner Jagusch crossovers.  The horn of 604E compression driver has an issue - ringing on 7.5KHz. Mastering Labs crossover filter out this frequency. It also suppresses upper bass and lower... 
Top resistors
What are the best resistors for horn compression driver crossovers?  
Horn speakers are really bright?