Many thanks for the replies so far - all much appreciated.
Sorry - my typo. Yes, Configuration 2: Hi-CAP socket #3 to NAP-110 (not socket #4).
Following replies - I have tried Hi-CAP sockets #1 and #2. In these configurations, the NAC-32 red LED does not illuminate (it does if socket #3 used). Nevertheless, the result is the same: no output.
As for LEDs:
- Hi-CAP LED within switch illuminates when switched on
- NAP-110 LED within switch does not illuminate when switched on. However, NAP-110 must power-on for configuration 1 to work.
To summarise…
Without Hi-CAP:
- NAC-32 #4 (output) to NAP-110
- NAC-32 #5 (output to Hi-CAP) linking plug
- NAP-110 red LED not illuminated
- NAC-32 red LED illuminated
- Configuration works.
With Hi-CAP (Hi-CAP #3 to NAP-110):
- NAC-32 #4 (output) unused
- NAC-32 #5 (output to Hi-CAP) to Hi-CAP #4
- Hi-CAP #3 to NAP-110
- Hi-CAP red LED illuminated
- NAP-110 red LED not illuminated
- NAC-32 red LED illuminated
- No sound output
With Hi-CAP (Hi-CAP #1 and/or #2 to NAP-110):
- NAC-32 #4 (output) not used
- NAC-32 #5 (output to Hi-CAP) to Hi-CAP #4
- Hi-CAP #1 and/or #2 to NAP-110
- Hi-CAP red LED illuminated
- NAP-110 red LED not illuminated
- NAC-32 red LED not illuminated (does illuminated if using Hi-CAP #3)
- No sound output
To be honest, I am not a HiFi technical buff. I just fell in love with the sound quality!! So, this has me totally confused. See Technical Confusion below if interested.
As for my NAC:
Whether my NAC is a 32 or 32.5, I’m not sure - sorry. Both the original box and rear tag state 32 - not 32-5. However, the rear panel is as 32.5: 2xphono; tuner, 2xtape, output, output to Hi-Cap socket 4. Naim upgraded the 32 to the 32.5 in 1985, the year of my NAC. My serial number is 200xx so perhaps a very early 32.5. Maybe someone just forgot to add the “-5” ?!
Rear panel of my NAC vs NAC-32.5:
Technical Confusion
Without Hi-Cap:
- NAC-32 #4 is marked output: Ch1, Ch2, +24v, -ve.
- Ch1 and Ch2 are obviously signal output.
- However, despite socket being marked as output, I assume the +24v is a power input since the NAC-32 has no power supply (i.e., 240v mains).
- NAP-110 socket is marked input: Ch1, Ch2, +24v, -ve.
- Ch1 and Ch2 are obviously signal input from NAC-32, which is then output to speakers.
- However, despite socket being marked input, I assume the +24v is power output to NAC-32. The NAP-110 itself does not require a +24v input, deriving its power from its 240v main supply.
- If correct, his makes sense.
With Hi-CAP.
- NAC-32 #5 is marked output: Ch1, Ch2, +24v, +24v, -ve.
- Again, Ch1 and Ch2 are obviously signal output.
- However, again, despite socket being marked as output, I assume the 2 x +24v are power inputs since the NAC-32 has no power supply (i.e., 240v mains).
- Hi-CAP #4 socket is marked: Ch1, Ch2, +ve, +ve, -ve.
- Ch1 and Ch2 are obviously signal input from NAC-32, which I presume are then fed through to sockets 1, 2 and 3.
- Again, I assume the 2 x +ve are +24v power outputs to NAC-32.
Now this is where it gets interesting and confusing.
- Hi-CAP sockets #1 and #2 are marked: Ch1, Ch2, N/C, -ve.
- Whereas Hi-CAP #3 is marked: Ch1, Ch2, +ve, -ve.
- For #1, #2, #3, Ch1 and Ch2 are obviously the signal output fed through from socket #4.
- The NAP-110 powers itself and therefore, does not require a +24v supply.
- Therefore, Hi-CAP #1 and/or #2 should be the correct sockets to use to connect the Hi-CAP to the NAP-110. Sockets #1 and/or #2 will output the signal to the NAP-110 but not a +24v supply.
- However, on using #1 or #2, the NAC-32 red LED does not illuminate and there is no sound output.
- Whereas, on using #3, thereby providing a +24v feed to the NAP-110, the NAC-32 red LED does illuminate. Nevertheless, there is no sound output.
- This seems to suggest that the NAP-110 is lacking +24v power.
BUT, when the Hi-CAP is removed leaving only NAP-110 and NAC-32, the NAP-110 is clearly supplying a +24v feed to the NAC-32 as the NAC-32 red LED illuminates and the system works (i.e., sound is output from speakers).
As I say, I am no technical buff – so apologise if I am missing something here.
But - given the NAP-110 must supply +24v to NAC-32 in the configuration without Hi-CAP – then why does it need to be connected to Hi-CAP #3 to illuminate NAC-32 red LED when using Hi-CAP ?
