Although their speaker outputs behave similar to tube amps you can safely disconnect the speaker and play them without a speaker or load connected. Another new feature on the Powertone III is the OTS circuit. Both loops can be bypassed with an FS2 footswitch or a MIDI switcher. The OTS circuit should be considered as an on-board effect unit which you can turn-on or bypass with the footswitch. On the other hand, if you connect two speakers in parallel (see diagram below or, by plugging the second speaker in the extension output of you amp or speaker box), both speakers will draw current from the amp. The Recording/PA output offers you a Speaker Emulated sound coming from a microphone placed in front of your speaker cabinet. If you compare it with a tap water installation, voltage is the height of the water in a tank or the water pressure in the water system. Parts such as output tubes and output transformers are not able to withstand these high voltages which often results in severe damage to those parts. In a tap water installation resistance is determined by the tap. There is only one amplifier out there that can match the gristle and gravitas of the one and only Greg Koch. In a tap water installation this is the same as using a second tap next to the first tap. Whether recording, performing or rehearsing, let your amp run at its fattest juiciest and loudest level….and use the Loadbox to tame the output to a user friendly volume. Since the introduction of the first “Radiola” moving-coil loudspeakers in 1926, we use the word “impedance” to define how much a speaker loads an amplifier. From pristine clean tones all the way through to exciting high-gain tones with infinite sustain the Powertone III will amaze you. Finally, there is a balanced XLR DI output with line level signal, speaker emulation and ground-lift for connection to recording or mixing consoles, and a 1/4" output with switch-able levels for connection to any type of amp or monitor. Effects Loops Explained by Dolf Koch – Series vs. Nowadays, an effects loop is an integral part of almost any musical amplifier. The LB120 Loadbox II is available in a 4, 8 or 16ohm version. A speaker on the other hand has an ohm value that depends on the frequency, therefore this ohm value is called AC resistance or impedance (Z). With the footswitch you can switch from Rhythm to Solo volume giving you more power to make sure your solos will always be heard. As we saw above less current is the result of a higher resistance. Koch Jupiter 20 Watt Junior Combo Koch Amplifiers Dealer Canada "Shop Where The Pros Do" 604 682 4422. The high-gain and ultrahigh-gain tones will now give you a tighter, more complex and harmonically rich sound with lots of definition, depth and of course tons of power. However, with a tube amp this works differently. So keep this in mind if you have a tube amp; always connect a speaker or a dummy load to your tube amp, never play it without speaker or power attenuator/dummybox connected. Both taps together will supply twice the water current. The OTS circuit is a little tube amp that can be overdriven to create real power amp distortion at any volume level. You guessed it: it's "The Greg" by Koch Amplifier... 500 S Arthur Ave, Suite 700, Louisville… In the graph you can see that the 4 ohm (3.99) impedance of this speaker is an average (or nominal) value. The Koch Superlead also features both pre and post FX loops for adding tone shaping pedals before the pre-amp, and modulating pedals after the pre-amp. The Koch Superlead is the perfect tube powered preamp for rehearsal, recording, touring and fly-ins where you need to take 'your sound' with you. But why in ohms? Whether you use overdrive pedals to provide your gain, or you're looking for your amp to provide full bore distortion on its own, the amp you go for will determine the overall character your audience hears out front.. The only two effects available were reverb and tremolo and top of the line models had one or both effects built in. Later, when effect units became available (wah-wah, delay, chorus, flanger). As you might know, the output power of solid state amps varies with the load resistance of the speaker. The remote control input can be used with midi switchers or other external switching devices. This is one of the reasons that tube amps sound different than solid state amps, they react different to the speaker’s dependence of frequency. Building the best Combos, Heads, Cabinets and Powersoaks. In a tap water installation if you place a second tap behind the first tap (in series), the second tap lets only a part of the water through that comes from the first tap. Channel-1 offers a wide variety of sounds from sparkling cleans with tons of headroom all the way through moderately overdriven sounds. If you do that you will not damage anything. The only two effects available were reverb and tremolo and top of the line models had one or both effects built in. With the added Drive control Channel-1 offers a greater variety of tones while preserving the wonderful warm and crystal clear tone of the Powertone I and II. The Loadbox can also be used as a straight transformer balanced DI, or to convert almost any amp into a headphone amp for rehearsing. In order to create a more authentic sparkle and to allow the Presence control to operate on both the Clean and the Gain channels we’ve relocated the Presence control to the power amp section. Tube amps made in the 50s and 60s have no effect loops simply because there were no effect units. For both Live and Recording situations we’ve included a Recording/PA direct output on the back panel of the amp. As described above solid state amps lose their output power in a lineair way: the higher the impedance, the less output power. The lowest value is 3.47 ohm (at 400Hz) and the highest is 12 ohm (at 20 KHz). So the total water current gets less. A tube amp tries to maintain its output power and as a result of that it raises its output voltage if the impedance of the load gets higher. Koch's Jupiter combo is a hybrid design, which blends a pair of 12AX7 preamp valves with a clever solid-state output stage that promises to provide all the dynamic punch and sonic warmth of valves. A resistor has the same ohm value throughout the whole frequency area, this ohm value is called resistance (R). This current flows through the speaker and pushes it to create soundwaves. In addition to that, the new Depth control gives you an incredible boost in the low end. The more you open the tap, the lower the resistance gets for the water and the higher the water current becomes, and vice versa. If a tube amp gives full power at a 4 ohm load, it might generate even 70% or more of it’s power at 8 ohms (instead of 50%). Isn’t ohms used for resistors? ... Tube amps made in the 50s and 60s have no effect loops simply because there were no effect units. And isn’t a speaker a totally a different thing than a resistor? The output voltage increases when the load decreases. Although it just looks like it’s no more than just two jack inputs, a “Send” and a “Return”, there is so much more behind it!