Thiel Owners

@tmsrdg https://www.audiosciencereview.com/forum/index.php?threads/did-you-audition-nc500-vs-nc500mp-or-nc50...

I just got my 3rd Convolution filter from AcousticSound.ca. I now have found the perfect frequency curve for my speakers and room. I lose 10 dB of gain by running the Convolution filter in ROON but my preamp (HPA4) has a 10 dB boost feature. ROON also has PROCEDURAL EQ which allows you to reclaim that lost gain. I decided to use my premps boost instead (I could use both).

Remember, my posts about the AHB2 not hitting hard enough. Well with the drivers and the wiring fixed. With the gain boosted and mainly with the Convolution filter. Things are really rocking. A big speaker in a small room sounding like it is now is incredible. No fatigue at all.

I also spoke with Benchmark technical support because my preamp had a glitch on the boost adjustment (we fixed with a factory reset of the GUI). They also said that 2 mono AHB2 can put out 700 watt at 2 Ohm. They cannot publish this because the amps cannot run like that for extended time. They also said the mono amp is stable to 1 Ohm. It also has the forward correction to stop clipping to get to the speakers. Just an FYI.

Wow, just so happy with what I am hearing today. The CS3.7 has never sounded this good in any dealer demo I went to with much more expensive gear.

I do not need more power, a single stereo AHB2 is great. That $700 I spent on the Convolution files creation saved me $3K or $6K on a new amp.

@yyzsantabarbara
Great to hear you find the single AHB2 so good with the 3.7s. So do I. Also, I don't know anything about Convolution filters, but my interest is tweaked here.
Gotta ask, how did you notice that boost adjustment glitch in the preamp? I have the LA4 -- essentially same as HPA4.

@tmsrdg I know you had a single AHB2 and are also a musician. I was thinking why does my system sound bad and yours so good with a single AHB2. There were hardware issues for sure but the room was still a big impediment for me.

Here is a link to a post I made that digs deep into what I did.
https://forum.audiogon.com/discussions/room-correction-roon-rew-room-eq-wizard/post?postid=2064340#2...

Here is a another post I made that has a bit more info.
https://forum.audiogon.com/discussions/speakers-good-for-close-to-wall-placement/post?postid=2065116...

The ComputerAudiophile.com site is were this advanced DSP stuff gets chewed around more than here on A’gon.

All I have to say is this Convolution engine in ROON is brilliant stuff. Just transformed my system. If you want to see some graphs send me PM and we can do that by email. Don’t tell anyone since email is not allowed.

@tmsrdg Oops, forgot to answer the question about the boost adjustment. My HPA4 had the boost disabled on XLR1. XLR2, RCA3, and RCA4 all worked. I worked it out with Benchmark tech support. We ended up doing the FACTORY RESET on the GUI. I lost some settings but not big deal to manually restore them. I think I may have seen this before.

It was important to get the 10 dB boost today because the Convolution adjustment took away 11 dB. I learned a about ROON DSP settings the past few days. There is boost in the ROON settings too but as of now I have disabled that.