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Post by jhelms on Oct 9, 2016 3:12:02 GMT
A new product from G1217! Frans and I have talked about making this an actual product for ages (he has a great writeup on attenuation cables already) Here is a G1217 version Specs:- Presents 35ohm load to your amplifier - 3ohm output resistance - Best suited for headphones 12-64ohm (12-300ohm good with high sensitivity headphones) - -20dB reduction in output level - 6.3mm plug (to your amplifier) with 3.5mm jack for your IEM's or other (3.5 back to 6.3 adapter easy to source) Why it rocks:- Plug and play -20dB attenuation for sensitive headphones - Added protection for using sensitive headphones with high power amplifiers - Significantly lower background noise (if your amplifier has hiss or even some low level hum - this adapter will really knock it out) - Built with rugged pro-sound grade components (Neutrik 6.3mm gold plug / 3.5mm gold jack) with aluminum shell - VERY nice Mogami Neglex cable used - Precision Vishay / Dale resistors used Price will be $44.99. I really wanted to charge less for these but they are honestly a pain in the arse to build properly (taking time to ensure quality over quantity)
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Post by tommo21 on Oct 9, 2016 11:05:03 GMT
This looks nice, is it avaliable for order now? Can't find it on the website...maybe I'm just blind..
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Post by jhelms on Oct 9, 2016 16:35:05 GMT
It will be added to the site today! Shoot me an email for quick ordering - I can send you an invoice anytime!
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Rabbit
Administrator
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Post by Rabbit on Oct 9, 2016 16:50:36 GMT
That looks really smart Jeremy.
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Post by tommo21 on Oct 10, 2016 7:45:44 GMT
That looks really smart Jeremy. I put in the order on the website a few moments ago. Looking forward to use it. Looks much better thought out than those cheap impedance/load adapters. I'm sure the sound will be superb.
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jello
extremely active
Posts: 1,569
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Post by jello on Oct 10, 2016 10:15:02 GMT
Aye, looks very nice and good to finally see one of these cables terminated with a 6.35mm jack.
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Rabbit
Administrator
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Post by Rabbit on Oct 10, 2016 10:38:34 GMT
I'm typing with dirty hands ....... (roof on the go)
It also serves as a useful adapter from large to small jack. I fancy one myself since it won't get at the sound like some do with impedance problems while allowing lower impedance headphones to be driven properly.
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Post by jhelms on Oct 10, 2016 13:33:29 GMT
Thanks guys! First batch is going out in the AM!
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Post by ronzo56 on Oct 11, 2016 1:38:17 GMT
Looks great. I bought an antennuator over a year ago now. Never use it. Must have been some impedance mismatch or poor quality. This looks like a good deal. Can't wait to hear people's impressions.
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Post by jhelms on Oct 11, 2016 15:08:13 GMT
One note, on the production units - I shortened the cable lead up by about an inch. This helps keep the 3.5mm jack from bouncing around your desktop as much as it comes more directly out of the amplifier with some flex vs laying down... if that makes sense.
Ron, I think you will dig these. I find in many cases, SQ is improved. Background becomes ultra black (this can be a pro and con) and another side effect... You can change the distortion / sound of the amplifier by increasing input levels to the tube while achieving desired volume level. You can do this by removing any input attenuation. In short - it is like a new tweaking feature to dial in sound.
Looking forward to everyone's thoughts as well!
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Post by tommo21 on Oct 20, 2016 6:13:51 GMT
Got mine yesterday and am testing it out now. It attenuates quite a bit more than I expected, but no problem with that. What I heard of hiss and the little background noise has gone, and also without any noticeable change in sound profile of the few headphones/IEM's I've tried. If it has changed it's for the better because of the quiet background.
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solderdude
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measureutternutter
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Post by solderdude on Oct 20, 2016 6:29:17 GMT
about 20dB attenuation is about 4x less loud to the ears and a 10x reduction in actual voltage level.
It is only intended to connect it to very sensitive headphones (IEM's and high efficiency portable headphones) and when experiencing background noise of the amp itself or if you want more travel on the volume control when the only range you have is only at the beginning of the volpot range.
We could make attenuators with less reduction BUT the output resistance would rise and for some headphones the noise reduction might not be enough so -20dB it became.
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Post by tommo21 on Oct 20, 2016 7:03:06 GMT
Yeah, I've got a few IEM's that's very sensitive and at around 12-16 Ohms. It's for these I attended to use this.
I didn't think I noticed much noise in some of my headphones earlier, but with this adapter i noticed a little change. Not as much as on my iems though.
I think it's a good useful adapter/attenuator to help those who have sensitive iem's.
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Rabbit
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Post by Rabbit on Oct 20, 2016 7:54:45 GMT
That's the intended use really. Just very low impedance headphones that you notice amp noises. It also depends on the headphone sensitivity so for instance a 32 headphone that is sensitive is going to show more hiss than a less sensitive 32 ohm headphone. The k702 and k712 are lowish impedance but they aren't that sensitive so hiss doesn't show at all although they can both easily show hiss with their treble peaks!! My 24 ohm (?) Denons and th900 do show hiss. They are quite sensitive and show treble problems easily, so an adapter would make sense for them.
It does surprise me how many people use an amp with iem's though. I guess a good high end one would be worth it, but the limited aspect of so many of them makes an amp like an Ember seem like real overkill.
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Post by jhelms on Oct 20, 2016 14:41:38 GMT
Very cool - appreciate the review! Just completed another batch after a long build session last night. More available
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