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Thanks for your response and suggestion
Be careful when using speaker amps on headphones...
You can also use the ifi iesl to connect headphones to a speaker amp. It is designed for this as well as driving electrostats off speaker amps.
i do not get using a speaker amp with the TC when there are so many headphone amps without all the hassles and risks that drive the TC so well....formula s/powerman as an example
I plan on using my speaker amp for speakers and for headphones... I can't really afford or justify spending Summit-Fi money on two separate setups.
that is a different discussion....i am speaking of people only using HP's
Too much hassle to keep switching back and forth but that's just me. I have a hard time switching between my HPAs...lol...
I'm intrigued by the use of a speaker amp but in the end, it doesn't work for me as I do all my HP listening in my bedroom and I refuse to bring or buy a big heavy hot speaker amp into my bedroom for the sole purpose of listening to my headphones.
But, to each his/her own.
Back to the music...
I am intrigued by the prospect of using a speaker amp. I am afraid my hegel would be too much power at 250w into 8ohms. I do have an arcam a38 that might do the trick if I set it up in a second room with the ls50 again. It has two sets of speaker taps that are switchable.
Are you going to use a box lime the iesl or the one that hifiman makes? I am also pretty happy with the m.p monoprice Cavalli liquid platinum right now too.
For now I am planning on using a XLR to speaker tap adapter cable while I try out different amps... Specifically Simaudio Moon 600i...
But I will probably end up replacing the speaker tap adapter with something like this... https://www.olasonic.jp/product/?id=1526454029-697392
Take all due care of course, but for planar headphones in this category of sensitivity they're fine. I've hooked my HE-6 up to many, even 200W/channel monoblocks, no issues, no need for adapter boxes of any kind. There is far less reason to now with a lot more powerful headphone amps on the market than several years ago, but for a number of people for a variety of reasons they are still a consideration.
So would you say that an amp with these specifications would be suitable for the 47 ohm TC? how much power exactly would the cans be getting? and how much power is too much power for the TC? Sorry I'm very novice to the electricity side of things but I'm trying to learn.
Power Output: 120 wpc at 8 Ohms, 200 wpc at 4 Ohms
Frequency Response: +/-0.25dB from 10 Hz to 50 kHz
Signal-to-Noise Ratio: -103 dB, reference level: full power output
Total Harmonic Distortion (THD): <0.025% at 1 kHz, at 100 W, 8 Ohms
Gain 30 dB
Input Impedance: 50 kOhms
Damping Factor: 200, reference 8 Ohms nominal
Power Consumption: 350 Watts idle, 1000 Watts maximum
It's not so much the resistance of the Abyss as its sensitivity - 88 dB/mW (more sensitive than the HE-6 at 83.5 dB/mW, but still amongst the least sensitive production headphones). 120w/channel into 8ohm will significantly more power than is needed - the main thing will be volume control, as you will not have much play on the volume between silent and way too loud, so you'll want a good volume control with enough fine gradations to dial it in. With my HE-6 when I've connected to speaker amps I usually connect the speaker taps adapter with amp off, zero volume on amp, power on, double check volume is at zero, plug in headphones, play music and cautiously increase volume until at correct listening volumes (to disconnect zero volume, unplug headphones). I'd feel perfectly happy doing the same with the Abyss (I don't need to though, I've heard it on the CMA800R monoblocks that I currently use for my HE-6 and I won't be chasing other amplification for a very long time), but it's certainly a bit nerve racking at first until you're accustomed to it and not actively anxious about destroying your expensive headphones. If you're not careful enough then there is a real risk of damaging the drivers, and they would not be eligible for repair under warranty (and this is entirely reasonable to me, this is most definitely not a use the manufacturer intended). End of the day it's your headphones, your money, your risk. If it all goes wrong there is nobody to cry to, only you can decide if you want to try it (EDIT: Sorry if that comes across as harsh, I just want be clear about the risks rather than sugar coating anything or offering glib reassurances).
You may wish to check HE-6 and speaker amps for headphones posts to learn more.
One formula for power is voltage squared divided by resistance, P=V(2)/R. An amplifier is basically a voltage source that drives current into a resistance, or load, in this case speakers or a headphone. So power delivered is the inverse of any change in R. If resistance R goes up 2 times, power goes down 2 times.
For the AB1266 let's use 6 as the multiple (47/8= ~6). So an amp rated for 120 watts into 8 ohms is capable of 120/6= 20 watts into the AB1266. If you're going to play with speaker amps it would be sensible to stay under 60 watts into 8 ohms (or 10 watts into the AB1266) to help stay out of trouble, and as you go up beyond this the caution light turns to red...
Absolutely not harsh, its just the truth. & also very informative thank you. I've read some others having success with their speaker amps on the abyss, namely the Moon 600i for example which has a similar power rating to the one I've listed with 125 W into 8 ohm. Would this mean that I should be fairly safe with mine? From what I've gathered, I suppose it's about making sure the numbers are at least somewhat within limits, and also being very diligent with the process of connecting of the headphones and starting up the amp with careful volume control... problem is the amp (wells audio Innamorata) does not have a volume pot. It's preamp will be my Dave, so I'm hoping that process will remain the same?
Also a lot of the tapping adaptors I see around are terminated in a balanced xlr, is there a reason for that or can a 1/4 " TRS be used as well? I usually prefer to use my single ended lazuli cable with my abyss
I also came to ~20W in my calculations, so good to know my math is still OK.
Regards power - the more power, the more the risk. A lot of people have connected to amps with the same kind of output power you're talking. I have used my HE-6 on 200W per channel Merak monoblocks without incident (with Auralics pre-amp in front for volume control), of all the speaker amp setups I tried it was the most powerful... and my least favourite pairing, as it happened. Not familiar with the pre-amp on the Dave, so I cannot help you there I'm afraid.
Anyways, I think you're probably better served to head here for research and to seek specific advice - https://www.head-fi.org/threads/speaker-amps-for-headphones.649107/