Owner's Manual 444 Ampete 444 Owner's Manual Ampete Engineering GbR Gutenbergstrasse 48 50823 Cologne Germany fon fax 49 (0) 221 55 94 118 49 (0) 221 55 94 118 mail web engineering@ampete.com www.ampete.
Owner's Manual 444 __________________________ Ampete Engineering GbR, 2014 Ampete is a registered trademark copyright 2014, all rights reserved 2
Owner's Manual 444 We all... ... produce electronic waste! It's just a matter of time! We here at Ampete Engineering are not only consumers, like you yourselves, but also engineers of electronic products that we want to place into a modern world. Here it looks at first glance that everything has been invented already.
Owner's Manual 444 Table of Contents Foreword............................................................................... 3 Introduction........................................................................... 5 Features................................................................................ 5 Front panel............................................................................ 6 Rear panel............................................................................. 7 Hook up...............
Owner's Manual 444 Introduction The 444 is designed to combine guitar amplifiers, guitar cabinets and guitar effects! There have been Audio Loopers before, but there hasn't been the possibility to route one out of four amplifiers into one or two out of four cabinets. ... one out of two, two out of...
Owner's Manual 444 Front Panel 1. FEED THRU: Jack for an ungrounded direct signal connection from/to the backpanel FEED THRU. Use it for connecting tuners, wireless systems or any connection you need from back to front without using long cable connections. 2. BUFFER IN: Front Panel instrument input, which routes the instrument signal to your connected amplifier inputs via a high to low impedance buffer, for keeping signal clean and noiseless without coloring it. 3.
Owner's Manual 444 Rear Panel 1. PHANTOM POWER PEDAL Jack: Connect a DC power supply to provide phantom power for your MIDI pedal. By default the DC jack is connected to pin 1 (center pole) and 3 of the 7-pin MIDI connector. It can can be internally modified to serve pin 6 and 7. 2. AC JACK / AC VOLTAGE SELECTOR: When changing AC voltage for using the 444 in a different country, make sure fuse values are correct. 3. GROUND LIFT: Controls whether the 444s audio ground is connected to earth conductor or not.
Owner's Manual 444 10. FX IN: Connect the FX IN jack of the 444 to the input of your effect, whether it is a single unit like a delay pedal, a chain of pedals or rack units or another audio looper. This is exactly like you would connect it to your amp's FX Loop Send. When switching between amps on the 444, it automatically switches your effects to the currently selected amp. 11.
Owner's Manual 444 Controlling the 444 via the front panel Selecting Amplifiers and Cabinets / Switching rules & protection At this point you hooked up amplifiers and cabinets to the 444. Let's start switching! You should establish a certain operating process when operating the 444.
Owner's Manual 444 Controlling the 444 via MIDI Surely all the control functions of the paragraph 'controlling the 444 via front panel' (see page 10) pertain if you control it via Midi. But it offers some options beyond.... Checking and setting the MIDI Channel By pressing the MIDI CHANNEL button, the display will show the currently active MIDI channel.
Owner's Manual 444 If you are using a MIDI controller pedal with a let's say more simple software structure – meaning the controller pedal does not „know“ which amp or cabinet is currently in use - or if the number of CC messages in a preset is limited, it might work for you better using the 444s Control Change mode '1'. With that mode the 444 will process Control Change messages with value 127 („switch on“) only after switching off the previously selected amp or cabinet.
Owner's Manual 444 Troubleshooting Problem: No signal when an amplifier (AMP1-4) is chosen. Make sure all amp inputs and speaker outputs are properly connected. Never mix amp in- and outputs to different amplifiers! Problem: No effect signal when switching FX loop. Make sure the FX Loop of the chosen amplifier is connected correctly to the 444s matching FX Loop.
Owner's Manual 444 A word on impedances When it comes to impedances and matching of valve amplifiers and speaker cabinets, there have been written a lot of words and there have been told many opinions, myths and beliefs. And as it is so often in our world, all of them are in between the truth and the untruth. Some more, some less.
Owner's Manual 444 The diagram below shows some simple measurements (in that particular case taken with our Amp TWO, a 110 Hz, 150mV sine wave, which is similar to the 'A' strings first harmonic of a Humbucker guitar). The amp impedance switch has been set to either 4 (blue color), 8 (orange) and 16 (yellow) Ohm and in every of these settings a reactive load of 2, 4, 8 and 16 Ohm has been attached to the power amp. Let's point out only the two essential characters. 1.
Owner's Manual 444 But even if the power decreases by almost one third compared to a matching load, the subjective impression will be the volume is nearly the same (as long as the phases of the speaker cabinets are the same). This is simply because more speakers are now driven by the amplifier. You will notice a slightly different feel, which is caused by a different damping factor the power amp of your amplifier 'sees'.
Owner's Manual 444 _______________________________________________________________ Dimensions Front Panel: W 17,2“ (438mm), H 3,5“ (88mm), D 8,8“ (223mm) Front Panel: W 19“ (482mm) Weight 10 lbs (4,5kg) Power consumption 10W max. _______________________________________________________________ Ampete Engineering reserves the right to change specifications, wether it's technical, dimensional or in the owner's manual.
Owner's Manual 444 __________________________ Ampete Engineering GbR, 2014 Ampete is a registered trademark copyright 2014, all rights reserved 20
