We all know what output transistors are used in the old Naim Old Classic DR amplifers and so forth, NA009. Though I am curious about the XS2, XS3, SN2, SN3 please? Or do the NAIT series use the same output transistor?
Just curious.
Warm regards,
Mitch in Regional Oz.
Bit of searching;
Thank you, Robert.
Warm regards,
Mitch in Regional Oz.
After some more of Dr. Google, I found a hit on diyAudio, and it stated that the XS2 uses the “TO3P types 2SC3519/2SA1386, not the MT200 types on the schematic.”
Data Sheets here:
https://alltransistors.com/transistor.php?transistor=14842
https://alltransistors.com/transistor.php?transistor=7435
They are rated at 130 watts and 15 amps. This leaves me wondering if the same output amplifier transistors are used in both the XS2 and SN2.
Can anybody shed some more light on this, please?
Warm regards,
Mitch in Regional Oz.
The supernait 3 and lower end integrateds use off the shelf sanken transistors, the same as the Hicap dr.
It should be the SK3519 and A1386 from Sanken for the supernait 3.
I’m curious as to your interest? I have only sought out transistor types and specs when thinking of constructing something.
Dear IB,
I am curious as the NA009 transistor is stated in the NOC amplifiers and was wondering what the difference was between the XS2, XS3, SN2 and SN3. If the same output transistors were used in all four of these integrated amplifiers, and if so, why would owners state that they experience more grip and bottom end if the same output transistors are used in all four of these integrated amplifiers?
In the interests of being subjective.
Warm regards,
Mitch in Regional Oz.
It’ll be interesting to learn of your conclusions. However I suspect that overall output stage circuit topography and power supply have as much or more to do with it than differences between power transistors per se, the output transistors mainly setting limits on maximum design supply voltage and maximum power capability.
Only the NAP 250 DR and above (300DR, 500DR) will use the NA009 transistor. The older NAP 200, 250.2 Non DR, and 300 Non dr would be using the NA007.
For the CB and olive series, naim has used I think a BDY 57 for the first nap 250s, then later switched to their NA001. They then went around with a few transistors up to the NA005.
In my opinion, the transistor choice does not make as much as a difference as compared to the power supply design, which was the main driving difference between the olive amplifiers. Naim had stated in the nait 1 that what they were looking for was a very fast switching transistor, with little regard to the other factors. The NA007 and NA009 were necessary as they could deliver 350 watts without needing a bridge pair.
Case in point is the Nait 50. It does not have DR technology, nor the NA009 transistors. Its sound however could be voiced to sound fast and detailed, similar to the new classic.
Dear IB,
I think you are on the money.
Warm regards,
Mitch in Regional Oz.
@ThatsMynamedude Dear Sir, I think I confused everyone with my grammar. I am only comparing the output transistors in the XS2/XS3, SN2/SN3. Naim has stated in their advertising and highlighting what transistors they use in their DR range amplifiers (loosely speaking), the NA009, and its advantages. This led me to wonder what is used in the XS and SN range of integrated amplifiers.
Now that that has been established, why do people say they experience more grip and better bass when going from an XS to an SN? There has to be more to be learned.
As IB has pointed out, power supply design and no doubt subtle changes to the input amplifier in the integrated amplifiers. (Naim Forum Friends, please jump in here).
I found lots of grip and bass responses from my experience running (74 dB nominal) and 87.1 dB SPL (max) output for my ears. Leaving a mathematical 14 dB further to go. The XS has satisfied my needs thus far, and I do not need to go further up the ladder towards OC separates. Or can not validate to do so. Though the listening might be in the hearing, the temptation has been taken away with the OC no longer available new, loosely speaking. My speakers have an efficiency of 84 dB SPL for added information. Running calculations from long ago, I believe my speaker’s max ability was to reach 101 dB SPL for 100 watts into 4 ohms. Though happy to be corrected, old calculations even older memory.
I hope I am not flaming anyone. I’m just trying to be happy where I am in heart, soul, mind and bank account 
Warm regards,
Mitch in Regional Oz.
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