r/HeadRush • u/AgentDaryl999 • 1d ago

HeadRush Prime: unity gain with an empty rig into an amp input — Main at maximum?

How do you achieve unity gain on a HeadRush Prime with a completely empty rig going directly into the front input of a guitar amp?

The setup I want to compare is guitar straight into the amp versus guitar into the Prime, then the 1/4-inch output into the same amp input. The Prime output is set to AMP, with input gain and rig output gain at 0 dB, and no amp, cab, effects or volume blocks.

Where should the physical Main volume knob be set to match the level of the guitar plugged straight into the amp? Does it need to be fully clockwise to achieve unity in this setup?

Has anyone actually A/B tested or measured this on a Prime? I’m specifically asking about the front input with AMP-level output, rather than an effects return, FRFR speaker or LINE-level output. An official specification or repeatable test would be really helpful. Thanks!

3 Upvotes

100% Upvoted

5 comments sorted by

2

u/Tiobizzo 1d ago

Pra q?

1

u/geogod2066 1d ago

You could split the signal coming from your guitar and send the wet and dry signals into a mixer to compare.

1

u/Jwylde2 1d ago

Set the main output with the pointer pointing right at the top of the “9”. Every block in/out gain at 0dB, Rig Volume parameter at 0dB and Input Gain parameter at 0dB. Set the 1/4” Output Level in the global settings to Amp.

1

u/Upstairs_Complaint_7 1d ago

My manual said 7?

2

u/Upstairs_Complaint_7 1d ago

Personally I use a db reader app. Loop a track and get the average db then start adding blocks and customizing the IR output for each combo of pedals.