It's been some time since I last wrote in this thread and at the time I was awaiting for the Pass INT-150 to be delivered. I considered selling my HT system and going back to 2 channel but decided to keep the HT system and use the Pass for the front channels. Once I received the Pass I realized it didn't have a HT bypass as I was told by Reno-hifi. The amp sounded well with my Focals but I decided to send it back since it didn't have the HT bypass. I finally decided to sell the HT system last month and now it was time to purchase an integrated amp. Since I owned a Sim and heard the Pass, I decided to try the Modwright KWI-200. I called Dan at Modwright and he offered a great deal on a demo so I purchased it with his built-in DAC. Dan offered a 2 week trial period so it was a no brainer.
I received the amp a week later and noticed buzz coming from the speakers only when I switched to the built-in DAC. The buzz increased as the volumn increased. I tried trouble-shooting by unplugging the amp from the Richard Gray power supply and unplugging the rest of my equipment but the buzz was still there. I called Dan and discussed the different trouble-shooting that I tried. He suggested I return the amp and he offered to send another unit. So I packed it up and returned it. Dan tested the unit and didn't hear the buzz. So he tried to re-create my set-up by connecting an Oppo 95 into the DAC but still no buzz. After exchanging phone calls, Dan agreed to send the new unit so we can trouble-shoot over the phone if the second unit had the same problem. I received the second unit 2 days later and it had the same buzz. But before I called Dan I decided to unplug the Synergistic power strip I used for the cable power warts. The power strip was located directly behind the amp. Well low and behold, the buzz was gone. I called Dan and he deduced the electrical fields from the power strip and power warts were affecting the DAC since it was located right behind the amp. Once I relocated the power strip all was well. I have to commend Dan for working with me and also sending a new unit even though it turned out to be a problem with a power strip and not the amp. Dan is a great guy and if anyone is interested in his products, give him a call.
Now that the buzz was gone, it was time to listen. The unit comes with about 50 hours of break-in so it will need some more time to break-in especially the built-in DAC. I began by playing music from the Oppo's analog output. It sounded good but not great. I then plugged the Oppo into Mod DAC and wow, what a big difference. The sound was smoother and sound stage opened up. The Mod sounded more 3 dimensional than the previous amps I had. I can't wait to hear the Mod break-in further and report back my findings.
I received the amp a week later and noticed buzz coming from the speakers only when I switched to the built-in DAC. The buzz increased as the volumn increased. I tried trouble-shooting by unplugging the amp from the Richard Gray power supply and unplugging the rest of my equipment but the buzz was still there. I called Dan and discussed the different trouble-shooting that I tried. He suggested I return the amp and he offered to send another unit. So I packed it up and returned it. Dan tested the unit and didn't hear the buzz. So he tried to re-create my set-up by connecting an Oppo 95 into the DAC but still no buzz. After exchanging phone calls, Dan agreed to send the new unit so we can trouble-shoot over the phone if the second unit had the same problem. I received the second unit 2 days later and it had the same buzz. But before I called Dan I decided to unplug the Synergistic power strip I used for the cable power warts. The power strip was located directly behind the amp. Well low and behold, the buzz was gone. I called Dan and he deduced the electrical fields from the power strip and power warts were affecting the DAC since it was located right behind the amp. Once I relocated the power strip all was well. I have to commend Dan for working with me and also sending a new unit even though it turned out to be a problem with a power strip and not the amp. Dan is a great guy and if anyone is interested in his products, give him a call.
Now that the buzz was gone, it was time to listen. The unit comes with about 50 hours of break-in so it will need some more time to break-in especially the built-in DAC. I began by playing music from the Oppo's analog output. It sounded good but not great. I then plugged the Oppo into Mod DAC and wow, what a big difference. The sound was smoother and sound stage opened up. The Mod sounded more 3 dimensional than the previous amps I had. I can't wait to hear the Mod break-in further and report back my findings.