PortaBrace AH-2HB Audio Harness The AH-2 is a rugged, compact and efficient harness that works with all field audio mixers. This popular harness and is lightweight and comfortable. The shoulder straps on the AH-2 are lightly padded and fully adjustable. The Harness also provides strong metal clips that attach securely to the field mixer bag. This harness is also a popular choice for audio mixers, recorders and also viewing monitors.