Bob Carver 180 Mono-blocks perform superbly

Hi Guys,
I have picked up a pair VTA 180 with GP volume pots and did bypass the attenuator found the sound open up a little more, more resolution with clarity. I however found the deep bass is lacking and thinking of upgrade the output tube to kt120 or kt150. Can anyone here with such experience with KT150 please advise?

How do you bias the tube sets without an attenuator turned full counter clockwise?

Lacking deep bass, compared to what (speakers and amplifiers)? According to the manual Velodyne Room Optimization program I'm getting almost the same frequency depth on my Avalon Eidolons as compared to a pair of Hypex nCore 400s. The trace for the VTA 180s is slightly fatter around the 30-50Hz region. I personally prefer the what the VTAs are doing for general listening. The nCore are relegated to my little recording studio were the overall presentation is more useful than tubes.

Keep in mind we're getting into the subjectivity of our differing rooms. My listening room is on the large size with a vaulted ceiling, using more reflective diffusers and little in the way of absorption

anyone compare these with the Rogue m-180? thx!

Happy hollidays fellas!

I have had my cherries for a couple of weeks now and love them! Mine are in black sn#130 and 131. I am very intrested in switching out the volume pot but need to find a local person to do it. I live near louisville KY if anybody as a suggestion. Has anybody tried any of the other things like fuses or power chords? Also I am curious for the opinions on adding the KT-120's. From another carver site it is said to take them up to 260 watts at 8 ohms.

Thanks

Keep the volume pot and upgrade it to a better one. It is useful to have as a feature. Lets you experiment with DAC directly too.