Warm Audio EQP-WA User Manual - page 6

HARDWARE CONTROLS — REAR PANEL

POWER

The EQP-WA requires a 3-pin, grounded IEC cord, and should ship 

with the power cord appropriate for the territory in which it is sold.  

Voltage is selectable between 115v and 230v operation, from the 

rear voltage selector switch.  Power input is via a standard fused 

IEC power receptacle with built in fuse access, chassis mounted on 

the rear of the unit.  Power is turned on and off  via the toggle switch 

labeled ‘ON/OFF’ on the right side of the unit’s front panel. 

AUDIO CONNECTIONS

The EQP-WA has both XLR and ¼ inch TRS balanced inputs and 

outputs, rear chassis-mounted, operating at line level.  Unbalanced 

connection is also possible via a ¼ inch TS cable.  It is not advised 

to connect both output connectors at once.

5

The rear panel

THE ‘BOOST AND CUT’ TRICK

Another phenomenon well known with this classic type of design is the ability to 

apply both boost and cut to a specifi c frequency at the same time.  The resulting 

eff ect is hardly the type of simple cancellation one might expect.  The cue shape 

of the boost and cut functions vary slightly, as do their gain potential; so even 

matching boost and cut levels by ear can produce a result quite diff erent from 

when boost and cut are returned to zero.  Some have described this eff ect as 

a gentle scooping of the area around the target frequency, with an emphasis 

added closer to the center frequency itself. Others describe it as a phase shift 

type of eff ect for the target frequency.  The result, by any name, is hardly subtle; 

and can be used to create emphasis or texture to a specifi ed frequency.    

USING THE EQP-WA IN BYPASS MODE

When in bypass mode, the audio signal is still routed through the Cinemag 

input transformer, dual vacuum tube stage line amplifi er, and Cinemag output 

transformer; and the EQP-WA will output at approximately unity gain relative 

to the input level (or within close margin, due to small variations in output 

gain from individual vacuum tubes).  This design allows the user to take 

advantage of an old ‘engineering trick’ known to many successful producers 

and recordists, whereby one uses a piece of gear with large transformers and 

high voltage tube stages as a ‘pass-through’ device or ‘tube buff er’ following 

a mic preamp, console send, or other piece of hardware, adding subtle sheen, 

richness, thickness, and harmonic content to an audio signal.   This technique 

can also be used on program material (complete mixes or subgroups).

10

ENGLISH

NOW LET’S GET STARTED

WARRANTY

TECHNICAL SPECS

A BIT OF HISTORY

WAXING PHILOSOPHICAL

HOOKUP DIAGRAMS

RECALL SHEETS