VAC 160iSE integrated with NOLA speakers


Given the superb home audio that I have been enjoying recently thanks to my new VAC 160iSE integrated coupled with my NOLA Metro Grand Reference 2 speakers and Synergistic Research cabling/power, I thought I would post a few brief comments about my set up for those who might be looking into any of these products. When making my recent amplification changes the enormously talented team at VAC gave me open and very insightful advice, as I hear they always do to anyone trying to set up a system with products of his design. By the way I understand that there will be a very similar VAC/NOLA set up by Mike Oltz of Xtreme Fidelity (who sold me my VAC160iSE) will be exhibited at the upcoming September 2014 audio show in Brooklyn, so there is an opportunity for anyone interested to hear this set up for themselves.

VAC’s 160iSE integrated puts out 85 wpc just like the original 160i, differing from the original in having (as I understand) a superior transformer, and also a special phono stage (that I have yet to use). It uses trickle down technology from VAC’s statement products. I had and loved the VAC 300.1a and Renaissance Mk3 preamp before the 160iSE. Given that my 87dB NOLA Metro Grand Ref 2 speakers don’t need the extra power, I decided to trade them on Audiogon for the 160iSE especially after hearing from Kevin Hayes at VAC that the new integrated performs in some ways at the level of VAC Statement products.

Having had the VAC160iSE at home now for two or more months or so, I can only say that the sound it produces in my system is truly fabulous – superb, open, rich mid-range without any edge and full of presence, great clean high frequencies. And I never find myself missing anything in the bass area compared to what I got from my NOLAs using my old higher powered VAC electronics. By the way, the NOLA Metros reach down into the low 20 hz region. I should also say that my room measures about 21 feet X 14 feet X 8.5 feet, and I understand that for larger rooms I might need more power or more efficient speakers.

The VAC160iSE definitely outperforms in very gratifying ways my previous, already superb VAC separates. And while I don’t really know the ultra high-powered VAC Statement system, I have heard it with NOLAs similar to mine, and based on that I would tend to echo Kevin’s insight about the 160iSE relative to those amps, although of course there is a big difference in the wpc output which probably has an impact in some ways. Since it needs far fewer tubes and has all its tubes out front, it is friendlier both cost-wise and logistically for tube swapping.

I should also say that I also very much like my NOLA Metro Grand 2s, with their open, 3D and natural yet detailed sound, and their (from all that I have heard) unequalled way with vocals. They are an excellent match with VAC amps. I understand that NOLA has a brand new upgraded Metro Gold version (newer even than the Gold version he introduced last year) that is a significant advance over earlier Metros. So I am looking forward to hearing those in September at the Brooklyn show.

My cabling is SR Element Tungsten, and I also use SR’s PowerCell8 Mk 3 which is a very helpful thing in NYC. I have had extremely positive outcomes using SR’s innovative UEF technology based bullets, HFTs, FEQ, ECTs, XOTs, etc. Their excellent products definitely work very “synergistically” with the rest of my set up.

Perhaps those with similar audio set ups or preferences have suggestions of interest for me. Look forward to those.

Thanks
agriculturist

Thank you.

Unfortunately, I'm in France and the contact email on the website isn't responding at all... so I have to find the information myself ;-)

So I got a Valvo VO4 ECC83.

I also got the three drivers: VO5/06/07 in Philips Herleen ECC82.

And the ECC82 for the VO3 in Mullard Blackburn.

I hope I've chosen everything correctly :-)

Hello

Your tube selection sounds correct to me though I should qualify this by saying I am speaking on the basis of memory. I sold my VAC some years ago. 

Also the specific brands of vintage tubes you mention are to my knowledge among the best. 

FWIW my experience with the VAC 160iSE was that the best driver tubes in v05/v06/v07 were E80CCs rather than ECC82/12AU7s.  VAC confirmed that these tubes were OK to use but only as driver tubes in v05/v06/v07. I felt that I got more power and presence.

VAC was pretty quick in those days in responding to emails.  

I bought my Vac Sigma 160se after owning a more mid-tier integrated with similar tube set up. I rolled a lot of tubes in my first amp trial and error...so I had  accumulated several NOS tubes .  I wanted to do the same with my VAC…but it seems not much was written in this regard. So I had to experiment.

I researched what each tube’s function…through talking with Vac and AI. Vac told me V01-02 were for the phono-stage. V03&4 were for the line-stage and V05-07 were preamp tubes. They didn’t offer much advice on rolling except that they recommended V03 and V05 would most likely affect the sound the most.

 

AI told me….. In a line stage, 12AX7 tubes provide high-gain voltage amplification (gain factor ~100) for boosting input signals, while 12AU7 tubes operate as low-gain (gain factor ~20), high-current buffers or cathode followers, ensuring low output impedance and clean signal transfer. 12AX7s offer warm, rich tone via earlier distortion, whereas 12AU7s provide higher fidelity with more headroom and lower noise.

Looking further at the preamp stage I deducted the V05 is the driver tube. It drives the power tubes in the output stage of push-pull amplifiers. Its higher current handling allows it to "push" the power tubes effectively. The V06-07 are phase splitters. They split the input signal into two equal but opposite phases to drive push-pull amplifiers.

And of course V08-11 are the power tubes.

I should mention I am a long way from an expert on tube amps design and function. I will post what I am using in my next post