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HE-500, LCD2, D5000, DT770, SR80, on a speaker amp (Emotiva mini-X A-100) Project - Page 147

post #2191 of 3660
Quote:
Originally Posted by Happy Camper View Post


For those having noise floor issues with the HE-500 cans, put a ten ohm/10 watt resistor across the positive and negative speaker post of each channel and that will bring the load closer to the normal 8 ohm rating of the amp. To see if it's a ground loop problem, you could use a three to two prong adapter at your power plug and see if it goes away. This is not recommended as a permanent solution (though many have) but can give you a quick verification if it's part of your electrical system or the amp.

The amp uses a two pin power plug.

post #2192 of 3660
Nevermind.

Edited by robrob - 11/4/13 at 5:00am
post #2193 of 3660

I got a chance to listen to the mini-x at a meet yesterday. I was quite impressed with it's performance. Can definitely say they are a bargain for under $200! 80% (conservative) performance to my Krell at 1/9 of the price.

 

I did hear hiss with my HE-6 with the loud meet environment, but that could have been because it used a tablet as a source.

post #2194 of 3660
Quote:
Originally Posted by ohhgourami View Post
 

I got a chance to listen to the mini-x at a meet yesterday. I was quite impressed with it's performance. Can definitely say they are a bargain for under $200! 80% (conservative) performance to my Krell at 1/9 of the price.

 

I did hear hiss with my HE-6 with the loud meet environment, but that could have been because it used a tablet as a source.

Thx for your honest evaluation.  I have lately had a chance to lag it around to a few friends' houses to compare.  They're still into home theater so quite a few have pretty $$$$$ amps.  I feel the same way when comparing the Mini-X to other more expensive amps, including my WA22. 


Edited by koiloco - 11/3/13 at 10:30pm
post #2195 of 3660

Instead of having a custom made XLR 4-pin cable I decided to get the TecNec Intercom Straight Extension Cable 4 Pin XLR M to XLR F 6Ft found on Markertek.com

TecNec Intercom Straight Extension Cable 4 Pin XLR M to XLR F 6Ft

http://www.markertek.com/Cables/Audio-Cables/XLR-to-XLR-Cables/TecNec/ICOMX4-MF-10.xhtml

This cable cost about $17.95 and it is one of the best cable construction I have ever seen. It uses  Canare Star Quad Cable with 4 Pin XLR Neutrik Connectors. Of course I had to cut off the male end and put on banana plugs. The shield on the Canare is braided and it took a bit of time to unravel it but with a bit of practice it can be done faster.  One thing to watch out in getting a 4-pin XLR extension cable is that many  4-pin XLR extension cables are used for power and have just two wires connected. The TecNec Intercom uses all four wires of the Canare Quad Cable to each of the four pins. It was not as easy to find the right cable but it work out in the end. I am going to have some interconnect cables made with Canare and it has one of the best RF interference rejection in the business.


Edited by john57 - 11/4/13 at 9:54am
post #2196 of 3660

I will let you know as soon as my unit come - unfortunately it got stuck at the customs clearance (emotiva did not put paypal invoice inside the package although I asked for that - thanks EMO now it's gonna take forever, so I'm a bit angry knowing the speed of customs people, sending them extra documents etc)

 

I think it might sound great with HE-4 directly from speaker taps, especially with bass and separation

 

damn, just can't wait for this amp


Edited by magicman - 11/3/13 at 11:14pm
post #2197 of 3660

As I understand correctly output of the emotiva can be used to connect another headphone amp to the chain in the same time not affecting the sound (input of emo->buffer->output of emo ?)

 

so I should be able to create safe audio chain like this:

 

DAC->input of emo->speaker taps of emo->HE-4 | output of emo->EF-5->let's say HE-500 at the same time and make some comparison in real time ? I guess this is nothing like preamp, just a copy (the same max rms voltage level) of signal from emo's input (buffer)

 

has anybody tried that yet ?


Edited by magicman - 11/4/13 at 9:44am
post #2198 of 3660
Quote:
Originally Posted by magicman View Post
 

As I understand correctly output of the emotiva can be used to connect another headphone amp to the chain in the same time not affecting the sound (input of emo->buffer->output emo ?)

 

so I should be able to create safe audio chain like this:

 

DAC->input of emo->speaker taps of emo->HE-4 | output of emo->EF-5->let's say HE-500 at the same time and make some comparison in real time ?

 

Yes indeed you can.

post #2199 of 3660
Quote:
Originally Posted by ohhgourami View Post
 

I got a chance to listen to the mini-x at a meet yesterday. I was quite impressed with it's performance. Can definitely say they are a bargain for under $200! 80% (conservative) performance to my Krell at 1/9 of the price.

 

I did hear hiss with my HE-6 with the loud meet environment, but that could have been because it used a tablet as a source.

 

That's very strange, especially with the HE-6

post #2200 of 3660
Quote:
Originally Posted by john57 View Post
 

Instead of having a custom made XLR 4-pin cable I decided to get the TecNec Intercom Straight Extension Cable 4 Pin XLR M to XLR F 6Ft found on Markertek.com

TecNec Intercom Straight Extension Cable 4 Pin XLR M to XLR F 6Ft

http://www.markertek.com/Cables/Audio-Cables/XLR-to-XLR-Cables/TecNec/ICOMX4-MF-10.xhtml

This cable cost about $17.95 and it is one of the best cable construction I have ever seen. It uses  Canare Star Quad Cable with 4 Pin XLR Neutrik Connectors. Of course I had to cut off the male end and put on banana plugs. The shield on the Canare is braided and it took a bit of time to unravel it but with a bit of practice it can be done faster.  One thing to watch out in getting a 4-pin XLR extension cable is that many  4-pin XLR extension cables are for used for power and have just two wires connected. The TecNec Intercom uses all four wires of the Canare Quad Cable to each of the four pins. It was not as easy to find the right cable but it work out in the end. I am going to have some interconnect cables made with Canare and it has one of the best RF interference rejection in the business.

Excellent find. That is a great cable at a fantastic price. It cost me over $20 for 10 feet of raw cable and 2 connectors. They offer both a straight and coiled version both using the Canare Star Quad. I'm going to link to it from my balanced cable how-to.

 

[UPDATE It's such a great deal I ordered a 10 and 15 foot cable for future use.]

 

I did make the mistake of buying a 4-pin XLR extension power cable with only 2 conductors. Luckily I was able to re-sell it on ebay.

 

This is what the Canare Star Quad looks like when cut open:

After you cut the cable you'll need to identify which wires connect to the 4 pins using a multi-meter's continuity function. When I made my 4-pin XLR cables from Canare Star Quad I marked the negative wires with a sharpie and used the blue wires as the right channel. For a speaker terminal cable you have the option of connecting the amp chassis to the cable's metal shield to provide a ground which will help protect the cable from RFI noise.


Edited by robrob - 11/4/13 at 10:56am
post #2201 of 3660
Quote:
Originally Posted by preproman View Post
 

 

That's very strange [hiss], especially with the HE-6

 

It was probably a very RFI noisy environment with the meet going on. Using an unshielded balanced cable with a single ended amplifier like the Mini-X means absolutely no RFI noise protection for your headphone cable and it may have been acting as an antenna and picking up electronic noise. Even if the balanced cable had a shield it wasn't grounded for RFI protection unless the speaker tap adapter was grounded to the Mini-X's chassis.

 

Using a normal single ended headphone cable and speaker adapter with a female TRS plug is better than a balanced cable when used with a single ended amp. A single ended (unbalanced) cable doesn't need a separate ground like a balanced wire because a single ended cable's shield is connected to ground at the negative speaker terminal which provides RFI protection.

 

I connect my balanced line speaker adapter's cable shield to my amp's chassis:

Notice the blue spade ground terminal on the upper adapter cable.


Edited by robrob - 11/4/13 at 5:28am
post #2202 of 3660
Quote:
Originally Posted by magicman View Post
 

As I understand correctly output of the emotiva can be used to connect another headphone amp to the chain in the same time not affecting the sound (input of emo->buffer->output emo ?)

 

so I should be able to create safe audio chain like this:

 

DAC->input of emo->speaker taps of emo->HE-4 | output of emo->EF-5->let's say HE-500 at the same time and make some comparison in real time ? I guess this is nothing like preamp, just a copy (the same max rms voltage level) of signal from emo's input (buffer)

 

has anybody tried that yet ?


Yup, you can.  That's another bonus of the Mini-X.

post #2203 of 3660
Quote:
Originally Posted by laoziwudilo View Post
 

good info.thinking of doing the same thing with my HE 400, speaker-tapping to a Jolida FX10 tube amp.

vrt

 

Solid state amps handle headphone impedance much better than tube amps so your sound quality from the tube amp may suffer significantly.

post #2204 of 3660

Quoted about $275 shipped to Australia for these, still great value in you guys opinion? Or are there better options?

Also not factoring in costs of speaker taps (how much would decent quality speaker taps cost?)

post #2205 of 3660

 

Just got an update that my cable from Ted from http://headphonelounge.com has just shipped! Can't wait for them to arrive!

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