Is anyone using this combination? I have an Audio Valve RKV Mark II arriving on Wednesday and will be adding it to my system. I also just ordered a Stefan AudioArt K1000 headphone cable with a custom ¼" phone plug termination. It will arrive next week. John

Here is an article on tubes posted over at HTF John

Could I have some opinions on these PC phones? John

I purchased an Ear+ form Mapletree Audio Design a few weeks back. When the unit arrived after setting it up I plugged it into my BP-jr. It tripped the GFI circuit. I plugged it directly into the wall and the unit powered up. I also noticed the power switch did not have any affect. The unit...

How does an amplifiers power rating react when connecting the AKG K1000 rated at 120 ohms to the speaker outputs as recommended? Amplifier power and current demand rises when impedance drops, Correct? Will the 120 ohm load present a problem? Are most amplifiers rated at 8 and 4 ohms...

I am looking for a small chassis SS amp to drive the K1000. I can use one of my headphone amps with preouts to feed it. Would the ZAMP be an acceptable choice? John

I have owned the HA-1 for a couple of days now. I ma using it with the stock tubes in place. My source is a dedicated Sony DVD-S9000ES with direct connection. The amp starts distorting at about 10 o'clock on the volume dial and becomes excessive before reaching 12 o'clock. The volume is not...

I am fairly new to tube headphone amplifiers. I have had a Mapletree audio Ear + for about 2 weeks and a Wheatfield HA-1 for 4 days. My MG Head OTL arrived today thanks to daycart1, The amp is absolutely noise free, no hum no buzz. Dead quiet at max volume w/no source signal. I let the...

The HA-1 uses a new production JJ/Tesla 12AU7 and a pair of NOS 7044 tubes. Can I roll in a NOS 12AX7 OR 5751 without damage? What is the difference between the 12AU7 and 12AX7 I have read these tubes can be substituted on the MG Head. John

My HT setup is geared heavily towards movie playback. I am putting together a dedicated headphone system for music listening. It uses 3 separate headphone amplifiers being fed from one source player. I am currently using a Niles AXP-1 selector in a reverse input/output configuration. It is...

The player I am using has 2 pair of analog outputs. I have one pair connected to my HeadRoom amp. I am installing 2 tube amps in just a few days. Would adding quality Y-adaptors to the unused pair be the best choice for feeding both tube amps? Or should I add a line switcher in reverse...

I am new to tube amps. I have a MG Head OTL and a MapleTree Audio Ear + on the way. I have acquired a few tubes while waiting for my amps to arrive. Opinions please? Long black plate Raytheon 12AX7 late 50's NOS Siemans Germany 5751 Gold Grade w/Platinum 1% triode Raytheon 12B4A...

Will the MG Head OTL drive the RS1's properly? John

What are others opinions on this process? Freezing Process John

I am putting together a dedicated Head Phone system. Could I get some feedback on what I've done so far? AC Power: Dedicated circuit. BPT BP-Jr on the way. Source: Sony DVP-S9000ES DVD/SACD Player (I had one lying around and decided to put it to use) Amps: HeadRoom Maxed Out Home...