Everyone is probably familiar with the Mosquito test. I can definitely hear the 12 KHz but at 15 KHz, I can only tell that there is some sound like a long soft click is being made. (age 55)   My 16 and 17 year old children will scream in agony if the 17.4 KHz tone is played. It is absolutely...

I use lots of gaming and other headphones with this amp. They usually have 3.5 mm plugs so I use adapters. I also got different adapters with different impedances to change the sound.   My issue is that sometimes the headphone 3.5 mm plug had to be put in just perfectly or I would hear only...

I went ahead and used "Field Expediant" items. I cut an old stero rca patch cord in the middle. Stripped the wire ends and connected them to the speaker out posts. Then I found an old stereo combiner rca to 3 mm stereo adapter. Connected it together with RCA barrel connectors. Then I used a...

Can I use the stereo speaker out for the headphones?   To keep from opening up the amp there are two ways that I see to connect the speaker out terminals for the headphones.   I could get a Neutrik 1/4" stereo phone jack and then mount it in a small plastic box. Then feed to speaker...

I have had this nice headphone amplifier for a couple of years. Over time the headphone jack has become touchier.   I use a 3 mm headphone plug and put this into a 3mm to 1/4 inch stereo plug adapter. I have to fine tune it to get good stereo sound out of it. I have used both the 3 mm...

Others know more about tube sockets than I do but the more that I used the amp the tighter the fit got. At first it was real wobbly but the heat must have changed the shape and molded the pins. also I gently straightened some of them. Now it is the opposite. When I take the tubes out I am afraid...

SP Wild, awesome move floating off the grid and on car batteries. Is it an inverter that gets it back into AC and into the amp? Is the hum different if it is hooked straight to wall power? If it is an inverter, is there a ground pin? If so you could do a ground lift. Either the cheap and not...

I have owned this amp for several months. I have Mullard EL84's and RCA 12AX7's. I am listening and playing games with a Beyerdynamic MMX300 headset with a 75 Ohm headphone adapter. I got the amp pretty quiet but there was still a little hum. I made a ground cheater plug to work out a hum on...

I love this amp and have tube rolled extensively. But I just got a Beyerdynamic MMX 300 Headset. This is similar to the Beyerdynamic DT 770 except that the DT 770 has 32, 250 or 600 Ohm Impedance available but the MMX 300 only has 32 Ohm available. I am going to write an extensive review of...

Quote: Originally Posted by moodyrn No wonder you didn't have great success using it as a speaker amp. Remember, as a speaker amp this thing needs to be used with"efficient speakers". Those things have a sensitivity of *87dbs*. Those require much more than the 5 watts the ming da is...

I am definitely not pushing these speakers as the ones to get but they work for me. I had a wonderful set of Thiels but our new place could not handle giant floor standing speakers. I got the Infinity Model Three V only because they were small enough and look cool. Infinity - Home Audio...

This is a great Christmas present. One under reported attribute of this amp is that it does have speaker jacks. If you have a television in the same room where you are using this amp then try running "efficient" speakers on both sides of the television. My impression is that regular music...

Thank you very much for all of the suggestions. I am interested in the Beyerdynamic DT190. I do have a question about the entire "IFB" and cueing science. Can I just hook it up and use it as a regular headset? I also thought that the MMX 300 MANUFAKTUR was cool since you can design the colors...

Here is my situation: Auzentech X-Fi Forte 7.1 soundcard with added OPA 637AU opamps for the right and left channel. I use a Sennheiser PC166 headset with the 3.5 mm plugs. I use it primarily for gaming. I either use the headphone amp straight out from the X-Fi Forte or use the right and left...

If you are not looking for powered speakers then there is also NHT, Epos and PSB, etc. I got a set of NHT mini-monitors about eight years ago and they still sound good. But the big difference is that these speakers are not really "computer speakers" since they require a preamp/amp combo or a...

I used to have high end audio (Mark Levinson). But because of moving, etc. now I only have mid-fi level equipment (Parasound). In my experience the high end audio shops usually will have something cheaper and much better than you can find at Best Buy, etc. Also they may have some used audio that...

Thanks.

Skylab, what would you recommend to roll for the JJ Tesla EL84?

I have a Ming DA MC84C07 and switched from the stock China 12AX7 to the Sovtek 12AX7LPS and then switched back. The Sovtek had a noticeable hum at only moderate levels and sounded too harsh. The musical nature of the amp was better with the China 12AX7. The China ones are excellent for a very...

The LA Audio DBT+ is a device that will convert unbalanced RCA to balanced XLR. The guide shows how to do it. LA Audio Search B and H audio for "unbalanced to balanced" and you will come up with a lot of solutions. But as mentioned above, rather than add another device to the chain it...

Thanks again for all of the suggestions. I took the ferrite cores that I had around the power lead to the hdd's and could not pick up any paper clips with them. But I was able to make a compass spin. Probably just the ferrite in it. left it off the hdd power and did not notice any change. I...

Now, I am into some big ferrite cores! I was in that gullible era of past audiophiledom where there was no tweak that was questioned. I painted all of my contacts with stuff that eventually made them all gooey. I even had a Tice power conditioner. But the fact is that the best investment...

The final report is this: things are improved but not perfect. The standard was that the USB connection on the headset has essentially zero noise in 3-D but there still is some noise when connecting the headset to the sound card directly or indirectly through the Ming Da headphone amp. But...

Thank you leeperry and Gilly for your responses. I had no idea that ferrite shielding was being used on some of the power cables from the power supplies. It would seem that with these giant power supplies that could run a refrigerator that there may be some crazy emi/rfi from these loose wires...

What will follow is a lengthy discussion of my system for anyone interested in the parts and how it may apply to your situation. But, the conclusion will be first to spare everyone else the tedium. If you experience noise (hiss, etc.) when 3-D Gaming and do not experience this otherwise then...