Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: Souter on September 07, 2019, 07:21:00 AM

Title: Distortion in the upper bass/mid frequencies
Post by: Souter on September 07, 2019, 07:21:00 AM

Hi, I'm getting distortion (sounds like the music is breaking up) in the upper bass/mid frequencies when playing loudly.
It is not noticeable at low volumes.

I'm using a modded t50rp headphones for listening.

Any ideas anybody? Could it be the tubes? (stock)

Advice would be much appreciated.

Title: Re: Distortion in the upper bass/mid frequencies
Post by: Doc B. on September 07, 2019, 07:27:25 AM

The T50RP is  50 ohms impedance and the Crack is designed for headphones of 200 ohms or higher impedance. That mismatch is likely the root cause of the distortion you are hearing.

Title: Re: Distortion in the upper bass/mid frequencies
Post by: Souter on September 07, 2019, 07:49:04 AM

Thanks Doc, would you not recommend the HD700 or HD660s then? (both 150 ohms)

Title: Re: Distortion in the upper bass/mid frequencies
Post by: Paul Birkeland on September 07, 2019, 11:33:49 AM

Those will work well with the Crack as well.

Title: Re: Distortion in the upper bass/mid frequencies
Post by: Souter on September 07, 2019, 01:08:07 PM

Thanks a lot.