This example was from 1998.  They are not made anymore - only the DSL401 is available.

We Power Scaled the amp which required us to build and fit a new bias supply.

The Power Scaling control was fitted beside the Master Volume control which left the amp looking almost standard.

A current sensing circuit was installed to enable safe and easy bias setting using a bias adjustment pot and meter jacks on the rear panel.

We also fitted an Eminence Legend speaker which made a vast improvement. 

This amp was used at the London International Music Show (LIMS) along with a Power Scaled™ Orange Tiny Terror and received many complimentary comments.