Rothwell In-Line Attenuators?

I'm using a pair on one of my amps to lower the gain from the pre-amp. Can't tell they are in the loop.

I've used them with good results to lower gain.

I've used them, and they work as advertised, but I think they are no better than the less expensive FMOD attenuators, which come in a variety of attenuation levels (3,6,9,12 dB, I believe). You can get them from www.partsexpress.com.
Rich

Dare I put in a dissenting report? I tried a pair, and in my usage noted, as advertised, a reduction of gain. But I also noted a slight veiling of the sound, particualrly in the upper frequencies-- I was conscious of their presence in the system, and took them out. YMMV.

I'll have to agree with Swklein. Anything added to the signal path will degrade the sound