Responses from scm

Class D Option For Bass  
Speakers 10 years old or older that can compete with todays best,
I don`t know about competing with "todays best" but my Revel F52`s sound pretty ok to me.    
Which has a greater influence on sound quality, the amp or the preamp?
@mbmi I get all of that using my passive (battery powered for pitch black backgrounds) with a tube phono stage and SS amps.   
Which has a greater influence on sound quality, the amp or the preamp?
@inna Yes, I agree most do, but that doesn`t mean much really. Can you explain the "less refined presentation" part ?  
Which has a greater influence on sound quality, the amp or the preamp?
@inna Not me, I'm very happy with my Tortuga Audio LDR Passive Preamp. It lets me hear what`s in the recording without adding any unneeded flavoring. Crystal clear sounding, never needs warming up either. Very easy to hear changes like rolling t... 
How often, and how, do you clean your stylus?
I use a thin sliver of ME and very, very lightly brush back to front one or two times  after each side. Been doing it this way for over 15 years now.    
Hsu has custom high pass filters
Yep, I`ve thought about getting that HSU crossover. I have two HSU 15" subs and maybe that crossover would work well for my Revel F52`s. I do use the 'Contour' setting on on the back of the Revels and it sounds pretty ok.    
Passive subwoofer amps help!
The problem with the Dayton Audio SA1000 amp, is, if it has a problem after the warranty expires you cant get parts for it. They still make the amp though 🙁 Mine stopped working and it now sits in a spare room. That`s a shame  
Passive subwoofer amps help!    
Limiting a full range driver
Funny..I`ve been running my Revel F52`s full range with subs from the start. I`ve just recently put the Revels closer to the front wall and put the switch in back to the 'Contour' setting and I`m liking what I hear. The three 'bass' drivers are ... 
Use of Y connector rather than passive preamp
The Tortuga Audio LDR has an adjustable impedance feature. The remote is pretty nice too.  My listening is about 99% vinyl  The Tortuga will allow you to hear what`s going on without adding anything to the mix. 😎   
Value of a preamp?
I have my phono stage plugged into my Tortuga Audio LDR attenuator then out from there to my amp. Very clean and transparent and it`s pretty easy to hear changes made to the system, like swapping cables/interconnects or rolling tubes. Plays as l... 
Amp — Leave on or turn off
My AT3002 amp has a standby mode feature. I think it keeps the amps circuitry charged up some. I usually turn it on about an hour before using.  
Value of a preamp?
 So then, an active preamp is actually 'adding something'  to the signal, (whatever that something is) but a passive attenuator is not. So when all the impedance values are matched up correctly with a passive attenuator, then a more true to the s... 
Does a turntable mat make any difference?
I`ve thought about trying a different matt on my P10, but I`ll just stick with the stock felt one.  Rega uses the same one on the new Naiad, so there must be a reason.