Reply to thread

Message

<blockquote data-quote="Art Welter" data-source="post: 130260" data-attributes="member: 52">Re: Ev fs212 processor settings using a drive rackShane,1) &quot;White noise&quot; is the sound of gain, without turning down individual components before the amp, hard to say where the gain is. Old DBX 1/3 octave EQs have lots of HF noise, I had to turn my amps down by 6-10 dB to get noise to an acceptable level when an engineer who didn&#039;t want to use the DriveRack EQs put them in series.2) Could be, the HF driver is a lot more sensitive than the LF drivers.3) No, DBX likes JBL, EV made it&#039;s own black box crossovers for these wedges.The EV DH1A on the HP64 constant directivity horn used in the wedge has a response that evenly falls off -15 dB from 2.5kHz to 15kHz, so a + 15 dB shelf &quot;CD&quot; boost is required, the HF crossover level then taken down somewhere around -10 dB relative to the LF output. There is one sharp peak in the response that can use a high Q notch somewhere up around 12.5kHz. The crossover should be 24 dB LR at around 1250 Hz. A very short delay is needed on the HF, without doing a null test can&#039;t say how much, but probably in the .25ms range.The 12&#039;s probably need around -4 dB at 400 Hz, about 1/3 octave band width.Art</blockquote>

[QUOTE="Art Welter, post: 130260, member: 52"] Re: Ev fs212 processor settings using a drive rack Shane, 1) "White noise" is the sound of gain, without turning down individual components before the amp, hard to say where the gain is. Old DBX 1/3 octave EQs have lots of HF noise, I had to turn my amps down by 6-10 dB to get noise to an acceptable level when an engineer who didn't want to use the DriveRack EQs put them in series. 2) Could be, the HF driver is a lot more sensitive than the LF drivers. 3) No, DBX likes JBL, EV made it's own black box crossovers for these wedges. The EV DH1A on the HP64 constant directivity horn used in the wedge has a response that evenly falls off -15 dB from 2.5kHz to 15kHz, so a + 15 dB shelf "CD" boost is required, the HF crossover level then taken down somewhere around -10 dB relative to the LF output. There is one sharp peak in the response that can use a high Q notch somewhere up around 12.5kHz. The crossover should be 24 dB LR at around 1250 Hz. A very short delay is needed on the HF, without doing a null test can't say how much, but probably in the .25ms range. The 12's probably need around -4 dB at 400 Hz, about 1/3 octave band width. Art [/QUOTE]

Verification