The model 3124+ utilizes the same microphone preamp circuit that is used in all API consoles. It uses the RE-115 K mic input transformer and the same output transformer that is used in all API equalizers. All four mic inputs of the 3124+ and the 3124M+ are powered by an internal 48 volt phantom power supply, front panel switchable for each channel. Also provided is a front panel 20 dB pad switch that effects both the Mic and Line in.
The model 3124+ can provide up to 65 dB of gain to an output clip level of +30 dBm. The Hi-Z front panel input goes directly to the op-amp, allowing a low level input such as a guitar or bass to be amplified without a matching transformer or direct box. This Hi-Z input can take input levels as high as +22, making it perfect for keyboards and other high level devices. The rear output is an XLR connector.
The model 3124M+ is a 3124+ with the addition of a complete stereo mixer. In conjunction with the gain control of the 3124+, the 3124M+ adds a stereo panner with a level control, and a post "fader" aux send. The stereo panners and the aux sends are bussed to master output controls and then to the rear panel jacks. A stereo AUX return is provided to return effects or cascade additional mixers for more inputs. The unique aux return pot acts like a panner to balance the left/right signal, yet staying stereo. It can also be used as a mono return. A standard 3124+ can be further expanded to an "m" at the factory. Several options for the "M" include a discrete unbalanced stereo output or a discrete balanced stereo output.
2 Year Warranty (labor) 5 Year Warranty (parts) We double the standard API one year warranty (parts and labor) on this item.
The model 3124MB+ is a 3124+ with the addition of a complete stereo mixer. In conjunction with the gain control of the 3124+, the 3124M+ adds a stereo panner with a level control, and a post "fader" aux send. The stereo panners and the aux sends are bussed to master output controls and then to the rear panel jacks. A stereo AUX return is provided to return effects or cascade additional mixers for more inputs. The unique aux return pot acts like a panner to balance the left/right signal, yet staying stereo. It can also be used as a mono return. A standard 3124+ can be further expanded to an "m" at the factory. Several options for the "M" include a discrete unbalanced stereo output or a discrete balanced stereo output.
The mixer has the distinctive look and feel that Manley fans have grown to love. From the military-grade knobs, switches and connectors to the oversized, lighted VU meters and hefty quarter-inch front aluminum panel, the mixer looks like it's ready for serious business. Designer ‘Hutch’ Hutchison has borrowed some ideas from their existing product line and added some nice new touches. For instance, the input stage is the same low-noise instrumentation amp that's used in their custom mastering console, and the summing amplifiers are similar to the make-up gain amps used in the Massive Passive. Other nice touches include the slick locking toggles used for the on/off and phantom power switches. These prevent accidental AC power up/down or phantom power up situations, which could be hazardous to speakers not to mention ribbon mics. They’ve also used some very cool looking and sturdy micro toggles, which are used to switch the relays for polarity reversal (no IC's here!) and the insert I/O function.
The inside of the mixer is just as impressive, using gold contact Grayhill rotary pots for the monitor switching and mic pre-amp gain, Tocos toggle switches, Bournes series 91 conductive plastic GT series pots and Siemens and Magnecraft relays. As the title alludes to, the mixer uses a tube stage at the stereo output utilizing two 12AT7WA and two 6414 tubes. This adds a very nice touch to anything you send to the stereo bus, making it perfect for those who want to add a touch of warmth to their mostly-digital signal path. The noise and distortion figures from channel input to channel output are an incredible THD+N of 0.0002 percent (-90dB) at unity gain (+4dBu). The channel input to mix output figures are not as good, but hey, a little tube distortion and noise is what imparts that much-needed love touch to a cold digital world. These figures are THD+N 0.05 percent (-65dBu) at unity gain (+0dBu).
Because you can have the mixer custom built to your specific needs, it's best to describe the 16x2 in modular form. From top to bottom a single mic pre-amp channel consists of a pan knob, a micro insert I/O toggle switch and LED, and a microphone gain knob, which is detented from zero to 60 in 5dB increments. Under that there is a micro polarity toggle switch and LED, the mix gain knob and the channel solo and mute buttons. The line input channel from top to bottom features a pan knob, an aux output gain control, the channel volume control and solo and mute buttons.
For each channel, buss assignment is done by a three way toggle meaning each channel can only go to one of three of the four busses. For Rob's console seen above, he chose to configure it so that channel 1-24 went to MAIN (the Tube stereo buss), A, or B and channels 25-32 went to MAIN, A, or C. The other mini toggle that's hard to see on each channel is a phase reverse switch. The top meter/monitor section is the same as the stock 16x2 which you can see explained in the owner's manual. The bottom section has a three way toggle to select A, B, or C to be displayed on the bottom meters, three master levels for the A, B, & C buss outs, as well as a master level for the EXT inputs. Finally there are four buttons at the bottom for A, B, C, and EXT subgroups to select them to be blended back into the MAIN tube Buss.
The PAN control is a standard stereo pan circuit with a center detent. The FX2 has a unique MUTE circuit that when pressed, the LED turns RED, but when the module is ON, the LED serves as a level presence indicator, illuminating green to show signal presence. This is very useful in live recording when you need to know quickly if a channel has signal or which has the loudest signal on it. It is also perfect for identifying which channel has the Kick and which has the Snare.
The FX2+ "AUX MSTR" is an OPTIONAL send master, which can be used in place of the SM1 or SM2 bus master when rack space is critical. It allows the rack to be filled with a full set of 16 modules, giving you 32 channels, including the masters, ALL IN ONE 3U RACK.
The rear panel feature connector provides for an external fader for the send master option on the FX2+.
The FX2 can be used by it self as a inexpensive dual stereo mixer for DAW or LIVE use when a simple stereo bus is all that is required.
When used with the MX2 series, the addition of FOUR FX2 modules will give you 8 returns and the masters for the FOUR sends on the MX2, saving you the space of having FOUR SM1 master modules.
The FX2 can also be used as an additional set of sends, fed from the direct output of the MX2, as the outputs of each panner can be internally set to feed any of the 16 available busses in the VRACK, allowing up to EIGHT sends from each MX2, including the onboard set of FOUR sends.
This module, when used as a simple external summing module, will bring the cost of a DAW external mixing system down considerably.
The FADER knob is the channel fader, with the ability to insert an external fader from the rear panel.
The PAN control is a standard stereo pan circuit with a center detent.
The INSERT button can act as a balanced insert for outboard equipment, or it can be used as a MIC PRE/TAPE PLAY switch for live recording to check the mic pre output and then the output of the machine for confidence checks or post recording playback without repatching anything.
The ST button turns on the stereo bus, which allows the module to send to the aux sends without going to the stereo bus.
The Polarity switch is a standard phase inverter for the main signal path.
The 4 sends are internally configurable for PRE or POST fader signal. The MX2 has an optional DIRECT transformer output.
The 5.1 switch turns on the signal to the surround bus, allowing the module to send signal to the aux sends without going to the surround bus.
The LCR button switches the PAN pot from stereo to LCR, and pans from left, through center, to right, or in 2 channel stereo, allowing phantom center.
The 2 sends are internally configurable for PRE or POST fader signal. One of the sends can be used as the LFE send for Surround Mixes.
The MX5.1 has an optional DIRECT transformer output.