https://assets.peavey.com//literature/manuals/118110_26340.pdf
https://www.youtube.com/watch?v=S6sFp9X27JQ
PV®i 8500 400-Watt, 8-Channel Mixer Amplifier WITH SD CARD / USB MP3 /Bluetooth® PLAYER
If you're looking at an eight-channel powered mixer like the Peavey PVi 8500, chances are you're playing smaller venues and the small stages that come with them. And that would normally guarantee you're going to have feedback issues due to the close proximity of mics and speakers - unless you've got the Feedback Locating System in the PVi 8500. If feedback occurs, the FLS system will light up an LED on the Graphic EQ slider that you need to adjust. Get it dialed in during sound check, and you'll virtually guarantee a feedback-free performance.
Footswitchable effects for more control over your soundIf you're both mixing and performing, you'll appreciate the PVi 8500's footswitch input. Connect a standard momentary footswitch (not included), and you'll be able to defeat the built-in effects and also activate the Master Mute switch. It's an easy way to quickly mute your system for connecting another microphone, swapping out noisy cables, and other situations where you just need to kill all sound momentarily.
Peavey equipped the PVi 8500 with their patented Kosmos-C audio enhancement module to make sure your sound is never dull or boring. Peavey explains that Kosmos-C Low control "provides 'natural bass enhancement' by adding harmonically related bass signals that track envelope of the original signal". The High control adds clarity to dull signals. Used together, you can add punch and clarity to any source.
Peavey PVi 8500 8-channel Powered Mixer Features:
I connect my Harbinger LvL 12 Channel unpowered mixer MAIN OUT, to a pair of Alto Professional TX310 350W 10-inch Powered Speaker INPUT (as shown in the diagrams below). I'm using a pair of 1/4" to XLR cables but I'm getting a heavy buzzing sound on the speakers.
Without any input signal on the mixer and at 0db, I'm still getting a hum -However, if I use my iPhone and connect it directly to the speaker there is no hum, if I connect a CD player directly to the speaker there is no hum. I also noticed that from the Harbinger mixer "phone" (headphone jack) there is no hum.. and if I bypass the harbinger mixer and go directly from my Pioneer/Serato Mixing board output to the speaker .. no hum..
From the speaker's documentation - The speakers are expecting a "Line Level" Signal .. it seems like the Harbinger mixer "MAIN OUT" or CTRL RM OUT, it's not delivering a "line level" signal.. The hum sounds like an old guitar tube amp with defective capacitors. Is there any diagnostic checks for the Harbinger Mixer?
This mixing console is designed primarily for a sound reinforcement or “live sound” application. Mixer input channels feed the main fader, and that feeds the main outputs. Typically your main outs will feed an amp that drives your main house speakers (Floor Speakers).
The control room circuit, which includes the control room out jacks and the headphones jack, has some flexible functionality as far as it’s source or sources for you as the console operator to be able to monitor some different signal paths independent of the main mix outputs…OR you can monitor the main mix.
The control room outs are for connecting to the inputs of your monitor amplifier, so you can control volume without affecting the level of signal going out the main outs at the same time - such that you run you mix into you DAW (Digital Audio Workstation eg garage band, avid pro tool) or Recording Device - and then monitor it on your NearFileds and Headphones
The control circuit has a switch to source the main mix, or the cue mix. And then you have an analog two-track return, and that can be assigned to the main mix, or assigned to the cue buss and monitored by the control room circuit, and additionally you have a digital return with the USB input and that can be assigned to the main mix, or assigned to the control room circuit directly, independent of the position of the control room source switch.
Alto 10" PoweredSpeaker
A Line In is much higher level signal, designed for powered electronic devices to send signals to each other. So, for example, you might plug a CD player into a mixer using the Line Ins. In pro equipment, a Line In can be an XLR input, a mono quarter-inch (6.35mm) TRS input, or maybe a mono eighth-inch (3.5mm) TRS input, although that’s less common. On consumer electronics, a Line In will probably be an RCA input.
An XLR is a kind of plug. It’s used on some microphones.
These are the two ends of an XLR microphone cable. The one on the left connects to the microphone, the one on the right connects to a mixing desk, amplifier, or computer audio interface. The back of the microphone looks like the one on the right; you can connect two cables end-to-end if you need a longer one.
They have very secure clips so they won’t fall out by accident; the tab sticking out of the plug releases the clip so you can disconnect it.
The three pins are positive, negative and ground. The signal is measured between positive and negative, ignoring ground, which is called ‘differential signalling’, and reduces noise. You can, however, make a cable that will feed a non-differential ‘single ended’ signal into a differential input, by connecting negative to ground.
These can supply power for microphones and preamplifiers; that’s called ‘phantom power’, and is a 48V supply between the two active pins.
To use one, you need the right kind of audio interface, and if the microphone needs phantom power that needs to be switched on.
Interfaces and mixers have two reference signal levels, one for microphones and one for powered devices. These will be labelled either ‘mic/line’ or ‘pad’; you want it in mic position or with pad turned off to use a microphone.
The same connectors are used for some other applications; certain kinds of theatre lighting system use these for control bus connections, for example. Logical, because a theatre will have large numbers of XLR cables and a supply of spare parts for them.
The Electro-Voice ZLX-15 is built from top-quality components. Its 15" woofer and 1.5" high-frequency titanium compression driver yield a 44Hz–20kHz frequency range with a maximum SPL of 126dB. This speaker's 250-watt continuous/1,000-watt peak power handling ensures that it pushes enough air to reach the back row of your venue, and a 90° x 60° coverage pattern ensures your entire audience experiences excellent sound.
Whether you use them as mains or as monitors, Electro-Voice's ZLX Series delivers best-in-class performance for musicians, DJs, and more. Custom drivers and a patented split-baffle design ensure superior driver time alignment and enhanced sonic impact and intelligibility. These lightweight speakers feature durable construction, as well as a unique grip design that makes transportation and pole mounting a breeze.
The IPR2 3000 is a member of Peavey's impressive IPR Series. Peavey went the extra mile in designing this exciting line of power amplifiers. For starters, each IPR Series power amp boasts an extremely light weight; the lightest IPR weighs under seven pounds! Adding to that, Peavey managed to increase output power, reliability, and thermal efficiency, so the IPR2 3000 and all the IPR Series power amps are ready for the most professional of rigs. Each is designed with a resonant switch-mode power supply as well as a high-speed class D topology, yielding incredibly high audio resolution and efficiency.
Peavey's DDT speaker-protection circuitry suiteOn top of all-out innovation, the Peavey IPR2 3000 also offers Peavey's exclusive DDT speaker-protection system, with multi-pint clip sampling as well as DC, Temp, Signal, and Active safeguards (all of which are referenced on the front panel via LED indicators).
Peavey IPR2 3000 Power Amplifier Features:
Over the years power amp technology has constantly been evolving, and the Behringer Europower PMP4000 power amps incorporate some of the the newest developments available. Thanks to the revolutionary Class-D technology with "near-zero" thermal buildup, the lightweight PMP4000 runs very cool, no more massive heat sinks or toroid transformers. You will love the punch and superior sound of these Class-D power amps. You can bridge the amps in the Behringer Europower PMP4000 for 1,600W of output, or deliver two 800W outputs for stereo or dual mono operation.
EffectsBehringer has provided 100 great sounding 24-bit stereo effects in the PMP4000. You can apply the effects to your main outs as well as your monitor mixes. You have the tools you need to create a great sounding mix with 100 presets featuring reverbs, echo, chorus, delays, and more.
Sound sculpting toolsTo give you the ultimate in flexibility the Behringer Europower PMP4000 has a strong set of tone sculpting tools. A 7-band graphic EQ lets you dial in exact tonal ranges. The built-in FBQ Feedback Detection System shows you the offending feedback frequencies so you can adjust them accordingly with the graphic EQ. You can create a huge, surround-like mix with the XPQ 3D stereo surround effect. The PMP4000 even includes a voice canceler function to remove the singer's voice from recorded music for karaoke use.
Europower PMP4000 Features:
Twin Triode
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2AU7 = ECC82, 5963, 5814, 6189
ECC81 (which will be somewhere between the '82 and the '83 in gain terms).
The ECC82 is a 12AU7 medium gain pre-amplifying double triode. Provides a very smooth sound with well-defined tones suitable for audio and guitar amplifiers.
ou can run a valve at any voltage below the recommended voltage .. the question is maximum performance in terms of gain factor.
The 2AU7 = ECC82, 5963, 5814, 6189 all give you a gain
GAIN
ECC82=12AT7=Gain of 70
ECC83=12AX7=Gain of 100.
ECC81 (which will be somewhere between the '82 and the '83 in gain terms).
GRID BIAS
ECC82 - recommended grid bias -8.5V
ECC83 - recommended grid bias - 2V .
The see how Anode voltage and types of tubes used impacts gain factor?
The current that flows through the 1k resistor in cathode, the tube and 100k resistor in anode causes voltage drop on 1k cathode resistor that is applied between cathode and the control grid that is at the zero volt potential through 47k grid stopper and 470k grid leak resistors.
From plate curves (anode curves) you can estimate the bias voltage, anode voltage, and current through the tube. Self bias works because the higher is the current, the higher is bias voltage (voltage drop on 1k resistor), and vice verse.
10K + 100K + 1K = 111K
I=v/r = 200/111K = 1.8miliamp
The current that flows through the 1k resistor in cathode, the tube and 100k resistor in anode causes voltage drop on 1k cathode resistor that is applied between cathode.
The control grid that is at the zero volt potential through 47k grid stopper and 470k grid leak resistors. From plate curves (anode curves) you can estimate the bias voltage, anode voltage, and current through the tube.
Self bias works because the higher is the current, the higher is bias voltage (voltage drop on 1k resistor), and vice verse