replytoken
500+ Head-Fier
- Joined
- Jul 6, 2004
- Posts
- 753
- Likes
- 10
I am trying to solve a noise floor issue that has come up in my home system. I have been using a Rega Mira3 integrated amp to power my 2 ch. home system. Its a wonderful solid state amp that puts out a very smooth and silky sound. When used as an integrated amp, the speakers are dead silent when the source is off. I recently purchased a Mapletree Audio EAR++ to use as both a tube headphone amp and as a preamp with the Mira3. In order to do so, there are two switches inside the Mira 3 that "uncouple" its preamp from its amp. Throwing these switches allows the EAR++ to connect directly to the Mira3's amplifier. Here's where things get a bit complicated.
When I power up the Mira3 in this configuration (amp and preamp uncoupled), my speakers have a slight, but constant, white noise sound (floor noise?). When a preamp is attached to the Mira3 and powered up, the noise is more pronounced. It is not specifically the EAR that is causing the noise, because I hooked up a HR Total Airhead as a substitute and I still had noise. Why would the Mira3 be absolutely silent when its preamp and amp are integrated, but it generates white (floor) noise when the amp and preamp are uncoupled? I do not believe it is a ground loop hum because it does not sound like a hum. I unplugged my other pieces of audio equipment (one at a time) to see if they were the cause, but had no success. I really like the Rega and the EAR, but I am at a loss as to how to eliminate this noise. Any suggestions?
When I power up the Mira3 in this configuration (amp and preamp uncoupled), my speakers have a slight, but constant, white noise sound (floor noise?). When a preamp is attached to the Mira3 and powered up, the noise is more pronounced. It is not specifically the EAR that is causing the noise, because I hooked up a HR Total Airhead as a substitute and I still had noise. Why would the Mira3 be absolutely silent when its preamp and amp are integrated, but it generates white (floor) noise when the amp and preamp are uncoupled? I do not believe it is a ground loop hum because it does not sound like a hum. I unplugged my other pieces of audio equipment (one at a time) to see if they were the cause, but had no success. I really like the Rega and the EAR, but I am at a loss as to how to eliminate this noise. Any suggestions?