Op amp rolling: I had a BEL 1001 Mk IIIa for many years. Before this I used to own a Mk I. I finally got the urge to do some op amp rolling for the Mk IIIa. The BEL uses two dual op amps. I found the following combinations sound the best: first stage...

Here is a distorton measurement using my Pentium III 450 and Sound Blaster Live! sound card. At 1W with 4 ohms load, harmonic distortion is less than 0.003%. This is very low. Most solid state amplifiers have 0.02% at 1W with 8 ohms load. (Note: 8 ohms...

The BEL 1001 MkIV has been the perfect match for my KEF107/2 speakers. The bottom end is extended and controlled, and each instrument is clearluy portrayed without any harshness. Densely orchestrated classical music (Brahms, Schumann,Mahler,etc.) is...

I started with one BEL 1001 and liked it so well I upgraded it and bought another for a dual mono set up. Superb amps! Voices are extremely clear and lifelike. To the extent they are not transparent, they lend a slightly tubey quality. The base is...

I own the BEL 1001 MK 1. I have not listened to the MKIII. ButI did listen to the MK II in a store. Here is my opinion: