SoundCraft Spirit Live 4 manual HI- Pass Filter, EQ Ualiser

							IN PUT
7.	HI- PASS FILTER
	Pressing this sw itch inserts a 12d B p er octave 100H z H i-Pass
	Filter in the signal p ath, im m ed iately after the inp u t am p lifier.
	This is		p articu larly	u sefu l on	live	vocals, and its u se is
	strongly recom m end ed , even on m ale vocals. It can also be
	u sed for filtering ou t low frequ ency hu m .
	Frequency Response Curves of the Hi- Pa ss Filter
		dB HI-Pass Filter
		4.0
		3.0
		2.0
		1.0
		0.0
		-1.0
		-2.0
		-3.0
		-4.0
		20	100	1k	10k	20k
			Frequency/Hz

8.EQ UALISER

The Equ aliser(EQ) com p rises three sections. The u p p er control p rovid es H .F.(treble) boost and cu t of +/ -15d B. The low er tw o p airs of knobs are arranged as a cu t/ boost control (low er knob) of +/ - 15d B, and a SWEEP(frequ ency) control w hich d eterm ines at w hich frequ ency the boost/ cu t action w ill be centered . The LF sections are essentially Sw ep t Low Frequ ency controls, covering a range from 40 to 400H z and p rovid ing m u ch greater flexibility than a conventional LF(bass) control. The MID section, w ith a frequ ency range from 250H z to 8kH z is p articu larly versatile for vocals, enabling p articu lar characteristics of the singer to be lifted or su p p ressed very p recisely.

Frequency Response Curves of the Equa liser

dB	LF Section
20.0
15.0
10.0
5.0
0.0
-5.0
-10.0
-15.0
-20.0
20		100	1k	10k	20k
			Frequency/Hz

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