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Author Topic: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")  (Read 18849 times)

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Marvey

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #110 on: April 28, 2015, 04:15:50 PM »
Quote from: audiofrk on April 28, 2015, 04:06:43 PM
Purrin have you guys settled on the Imputs?  Will it have rca or just xlr

It's single-end. I'd be happy to make a balanced bridged version for you for $2000 though.
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audiofrk

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #111 on: April 28, 2015, 04:29:32 PM »
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zerodeefex

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #112 on: April 28, 2015, 04:32:29 PM »
Stop saying things like that Marv. i budgeted for one EC amp this year.

Audiofrk: this is how new amps are born
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CEE TEE

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #113 on: April 28, 2015, 05:29:47 PM »
Quote from: purr1n on April 28, 2015, 04:15:50 PM
It's single-end. I'd be happy to make a balanced bridged version for you for $2000 though.

How much for the balanced bridged bi-amped differential super grounded diamond buffered mercury rectified version with ALPS pot?
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audiofrk

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #114 on: April 28, 2015, 05:31:55 PM »
Alps pot? Why you so cheap cee tee?
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jacal01

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #115 on: April 28, 2015, 05:36:23 PM »
Quote from: purr1n on April 28, 2015, 03:12:11 AM
No tubes. We decided that going with a tube PS would have defeated the point of an EC SS amp. We wanted to meet a certain price point. Ended up with a shunt power supply. It easily sounded the best among the five we wired up in the past two weeks. We are sending a very proto PS along with a near production BW up to Zerodeefex tomorrow.

Maybe a little nitpicking, but aren't shunt regulators notorious for being inefficient (parallel current drain)?  Wouldn't that pretty double your power usage, or does it not matter for the BW load? 
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MisterRogers

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #116 on: April 28, 2015, 06:43:16 PM »
Quote from: jacal01 on April 28, 2015, 05:36:23 PM
Maybe a little nitpicking, but aren't shunt regulators notorious for being inefficient (parallel current drain)?  Wouldn't that pretty double your power usage, or does it not matter for the BW load? 


Usually a minor consideration if a circuit can benefit from shunt supplies :-) I have a DAC that dumps some 50W of heat - a viable heat source if you live in Siberia.
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Marvey

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #117 on: April 28, 2015, 08:04:58 PM »
Measurement results using switcher brick (more current limited than the external supply):

Output Impedance: 0.1 ohms (I need to double check this. It's definitely way way less than 1.)

With HD600 as the test load, nominal 300ohms (we use headphones instead of resistors, don't try this at home):
  • 1Hz to 300kHz -1db
  • 1.3 Watts
With LCD2r2 as the load, 58ohms:
  • 1Hz to 250kHz -1db
  • 3.6 Watts
BW with external power supply shipped to Zero for the tour.








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CEE TEE

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #118 on: April 28, 2015, 09:52:38 PM »
Quote from: audiofrk on April 28, 2015, 05:31:55 PM
Alps pot? Why you so cheap cee tee?
The only joke hidden in there.  Hahaha.  You win. :)  I will test out this BW on my desktop from PWD/TransDAC/Yggy. Thanks to Marv and ZD.
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audiofrk

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Re: Eddie Current Red Top Headphone Amplifier (Now "Black Widow")
« Reply #119 on: April 29, 2015, 01:44:03 AM »
Quote from: CEE TEE on April 28, 2015, 09:52:38 PM
The only joke hidden in there.  Hahaha.  You win. :)  I will test out this BW on my desktop from PWD/TransDAC/Yggy. Thanks to Marv and ZD.


cavalli just confirmed that the carbon will be at the SF meet, Jude is bringing it.  Your mission if you chose to accept it is to steal it for a bit find Anax and borrow his HD800 and A/b the black window.  :wheel:




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