I received an email from Artisan Silver Cables which I have copied below:-
...or to put it another way: driving the hell out of your headphones (carefully!)...
So here's the story: we were recently contacted by a customer, who wanted us to make a pure silver adapter cable to connect the speaker outputs of his power amplifier to his headphones(!)
We were a little concerned about the potential to over-drive the headphones (or the customer's ears!), but we went ahead and made the cable, whilst advising him that he would need to be very circumspect with the volume control...
The cable was around 75cm in length and fitted with WBT's superb 0610-AG banana plugs (the same plugs we like to use on our speaker cables), going to a Neutrik 1/4 inch stereo jack socket.
Once the cable was made, it was tested in one of my personal systems, with a Red Rose amp, rated at around 30 watts per channel, driving my Sennheiser HD-650 headphones.
I was unprepared for the result.
The set-up absolutely trounced my usual headphone amp, which I had considered to be of decent quality - the music became extremely vibrant, pure, open & powerful, with far better resolution of very low-level information - just fantastic. In fact, the performance was far better than I had imagined was possible with HD-650s.
The way the amplifier uncompromisingly gripped and dominated the headphones - leading to fantastic sound - reminded me of reading Hi-fi News magazine back in 1985 (when I was first becoming interested in high-end hi-fi), with Ken Kessler's inspiring description of the way the fantastically muscular new Krell power amps exhibited "vice-like grip" over the speakers, forcing the speakers to sound better than you'd think possible...
Clearly, our customer's idea was excellent!
Caveats?
Yes, a few:
1. Clearly, great care is needed with setting low volumes - also the whole system will need to be of excellent quality and with very low noise.
2. The high sensitivity of the headphones may reveal previously unheard hiss and/or hum. For this reason, valve-based equipment may prove to be a problem, with it's lower signal-to-noise ratios.
3. Higher sensitivity headphones, designed to work with portable equipment will obviously be unsuitable. This is only going to work well with headphones that like to be driven and are expected to be used with dedicated headphone amps.
So, with the above provisos, this may be a great way of driving high-end headphones - and to my ears, superior to the great majority of specialist headphone amps.
Our customer simply had this to say:
"Hi Alister,
thank you very much for the adapter cable.
I got it last week and it has been running continuously since then.
It already sounded great right out of the box.
I can honestly say, that my headphone setup never sounded this good...
...Kind Regards, Jens"
The 1/4" stereo jack socket confused me so this is what he meant. http://www.neutrik.com/en/audio/plugs-a ... nj3fc6-bag
Headphones driven from speaker outputs.
- Dr Bunsen Honeydew
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Re: Headphones driven from speaker outputs.
That is what NVA headphone amps are but with a series resistor to drop volume and protect the headphones.
Re: Headphones driven from speaker outputs.
Many years ago I had a device called 'The Can Opener' which was driven from the speaker outputs; I suspect it worked in the same way as the NVA headphone amp. I didn't keep it because it was a PITA disconnecting it and re-connecting the speakers, and vice-versa. It was made in Bradford IIRC.
- Ithilstone
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Re: Headphones driven from speaker outputs.
I use to do that with my HE-6s now I use NVA amps to drive them so I dont have to as HP socket is directly connected to speakers taps (with small high quality resistor to drop volume)
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I am in the hi-fi trade
Status: Manufacturer
Company Name: NVA Hi-Fi
https://nvahifi.co.uk/
I am in the hi-fi trade
Status: Manufacturer
Company Name: NVA Hi-Fi
https://nvahifi.co.uk/
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Re: Headphones driven from speaker outputs.
Just discovered something interesting which reminded me of this thread. A while ago I started using my aged Sansui AU-217 (1978) as a headphone amp and was extremely impressed with the SQ. With only one input needed I plugged a DAC into the TAPE OUT sockets which bypasses the selector switch and effectively provides a direct input to the pre-amp.
Reading some online comments about these amps I discovered that this Sansui AU series have no dedicated headphone section but use the main speaker outputs routed via resistors to power cans. Which could explain why the performance is so good.
This really is a superb-sounding amp as are all in Sansui's AU-x17 series and truly excellent as a headphone amplifier.
Reading some online comments about these amps I discovered that this Sansui AU series have no dedicated headphone section but use the main speaker outputs routed via resistors to power cans. Which could explain why the performance is so good.
This really is a superb-sounding amp as are all in Sansui's AU-x17 series and truly excellent as a headphone amplifier.
Upstairs:
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NVA: Cube2 + LS6+ Sabaj A10a (2) + Little Bear MC2
Downstairs:
VinylLogic DM101 + Syrinx LE1 + Grado Sig MCX
DigiDenafrips Ares II + Volumio PC + Cambridge CXC
NVA: P50 (phono)Aiyima A07 MAX (2) + Arcam One
HP: Allo DigiOne + Sabaj A10d + AQ NightOwl
Office: Allo DigiOne SIG + SMSL M300se + Douk G4 (x2)
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- Ithilstone
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Re: Headphones driven from speaker outputs.
Well exactly the same thing can be said about all NVA amps with HP socket...
p/s it was standard practise up till late 70s I believe so almost all amps ( or at lease Japanese ones)up to 80s didn't have dedicated HP amp build in
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I am in the hi-fi trade
Status: Manufacturer
Company Name: NVA Hi-Fi
https://nvahifi.co.uk/
I am in the hi-fi trade
Status: Manufacturer
Company Name: NVA Hi-Fi
https://nvahifi.co.uk/
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Re: Headphones driven from speaker outputs.
Good to know - thanks.
Upstairs:
VinylPro-Ject 1.2 + Grado Sig Jr + Cambridge Alva Duo
DigiVolumio PC + Kiss DP-500 + Sabaj A20d
NVA: Cube2 + LS6+ Sabaj A10a (2) + Little Bear MC2
Downstairs:
VinylLogic DM101 + Syrinx LE1 + Grado Sig MCX
DigiDenafrips Ares II + Volumio PC + Cambridge CXC
NVA: P50 (phono)Aiyima A07 MAX (2) + Arcam One
HP: Allo DigiOne + Sabaj A10d + AQ NightOwl
Office: Allo DigiOne SIG + SMSL M300se + Douk G4 (x2)
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- CN211276
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Re: Headphones driven from speaker outputs.
I can recall that Sansui amp being very well thought of before the NAD came on to the scene.
Main System
NVA BMU, P90SA/A80s (latest spec), Cube 1s, TIS, TISC(LS7)
Sonore OpticalRendu, Chord Mscaler & Qutest, Sbooster PSs
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DH Labs ethernet, BNC & USB cables, Lindy cat 6 US ethernet cable
Second System
NVA P20/ A20, Cubettes, LS3, SSP, SC
Sonore MicroRendu, Chord Mojo 2 MCRU PSs, AQ Carbon USB cable & JB FMJ
Headphones
Grado SR325e/Chord Mojo, Beyerdynamic Avetho/AQ DF Colbat
RIP Doc
NVA BMU, P90SA/A80s (latest spec), Cube 1s, TIS, TISC(LS7)
Sonore OpticalRendu, Chord Mscaler & Qutest, Sbooster PSs
Network Acoustics Eno, ifi iPurifier3, AQ JB FMJ, Cisco 2940 & 2960
DH Labs ethernet, BNC & USB cables, Lindy cat 6 US ethernet cable
Second System
NVA P20/ A20, Cubettes, LS3, SSP, SC
Sonore MicroRendu, Chord Mojo 2 MCRU PSs, AQ Carbon USB cable & JB FMJ
Headphones
Grado SR325e/Chord Mojo, Beyerdynamic Avetho/AQ DF Colbat
RIP Doc
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Re: Headphones driven from speaker outputs.
Iirc there are a couple of circuits out there for diy purposes so that cans can be driven by any amp in this way
I built one a few years ago for a set of sennys, havent got the cans any more but I might still have the box I built somewhere. Sounded better than the musical fidelity x cans I was using for them.
I have a set of audio technica ath7 electret cans now and they are driven off the speaker outlets off my pass f5 via a box, not sure if its got a resistor network or a set of transformers in it as I havent opened it up to look.
I built one a few years ago for a set of sennys, havent got the cans any more but I might still have the box I built somewhere. Sounded better than the musical fidelity x cans I was using for them.
I have a set of audio technica ath7 electret cans now and they are driven off the speaker outlets off my pass f5 via a box, not sure if its got a resistor network or a set of transformers in it as I havent opened it up to look.
Analogue: oracle delphi sme 309, jbe series 3 cx unipivot dv20x2l, roksan xerxes tabriz vm750, jvc ql-y5f rigb at440, jvc ql-y3f vm750, lenco 75, technics sl150
Phono stages: cole lcr, benedict audio hothead
Digital: cyrus cd7, wiim mini x2, topping e30, jds labs el dac 2+
Amplification: nelson pass b1, nelson pass f5
Speakers: 15" fane aperiodic wardrobes
Cans: myryad z40, hifiman sundara + deva, fostex t50rp, sennheiser momentum on ear +over ear, b&w p5 and p7
Phono stages: cole lcr, benedict audio hothead
Digital: cyrus cd7, wiim mini x2, topping e30, jds labs el dac 2+
Amplification: nelson pass b1, nelson pass f5
Speakers: 15" fane aperiodic wardrobes
Cans: myryad z40, hifiman sundara + deva, fostex t50rp, sennheiser momentum on ear +over ear, b&w p5 and p7
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Re: Headphones driven from speaker outputs.
I had a set of ATH-7 once, wore them out completely. Brilliant cans!
Upstairs:
VinylPro-Ject 1.2 + Grado Sig Jr + Cambridge Alva Duo
DigiVolumio PC + Kiss DP-500 + Sabaj A20d
NVA: Cube2 + LS6+ Sabaj A10a (2) + Little Bear MC2
Downstairs:
VinylLogic DM101 + Syrinx LE1 + Grado Sig MCX
DigiDenafrips Ares II + Volumio PC + Cambridge CXC
NVA: P50 (phono)Aiyima A07 MAX (2) + Arcam One
HP: Allo DigiOne + Sabaj A10d + AQ NightOwl
Office: Allo DigiOne SIG + SMSL M300se + Douk G4 (x2)
Mission 760 + Monolith 887 + German Maestro GMP 450