Hi Mike -
The DNA-1 was originally offered in a monoblock configuration (along with the usual stereo model) but only a few were built.
Conversion of the stereo amps to mono is among the various upgrades offered by SMc Audio - just check the information available on our website at www.SMcAudio.com. You are welcome to contact us directly for further details.
Best regards,
Steve McCormack
SMc Audio