|Phantom Power||24-48V DC, 2-4 mA typical|
|Frequency Response||20-20,000 Hz|
|Gain||Unity (0 dB), +0/-1.5 dB|
|Noise (A-Weighted)||-115 dBV typical|
|Weight||8.8 oz (250 g) typical|
|Dimensions||5.12" (130.0 mm) W x
2.36" (60.0 mm) D x
1.73" (44.0 mm) H typical
|Input Impedance||10,000 ohms|
|Output Impedance||250 ohms|
|Maximum Input Level||+15 dBV (1% T.H.D. at 1 kHz)|
|Maximum Attenuation||33 dB at 1 kHz|
|Notes||UniMix specifications measured at 48V phantom power, 150 ohms input load and 100,000 ohms output load.|
Do you have questions about this product?
Get answers from real customers and in-house experts with AnswerBox.
Q:We're using two identical condensor mics at our pulpit, requiring two channels/two cables. Will this effectively combine the two signals to one channel, eliminating additional cabling, etc.?
A:Yes, you may use the AT8681 for your situation.
Q:If one input is connected to a mic with an on/off switch, and that switch is moved to the 'off' position, will the volume of the second mic jump?
Q:Want to combine line level Stereo outs on a church organ and feed to mixing board. It does not like to have the channels combined and causes distortion. Are the inputs isolated and can the unit accept line level signals?
Q:I'm using the AT8681 UniMix to mix 2 mics, each placed on a seperate guitar cabinet.(i've run out of inputs on my desk)
A:Thank you for your inquiry.
Q:Will the AT8681 unit work as a completely passive mixer?
A:No it will not. The AT8681 2-to-1 Microphone Combiner requires phantom power (24 to 48V DC is acceptable) to operate. It also passes phantom power on to the microphones connected to it. Your microphones may not need phantom power, but they should also function without any problem if phantom power is applied. The exception would be a ribbon type microphone. Do not send phantom power to a ribbon type microphone unless it is stated specifically that phantom power is required.
Q:For simple live mic mixing..?
A:Yes, it sure will.
Q:Will a phantom power in the output power both input microphones? Only one of them or none?
A:Yes, the AT8681 UniMix Microphone Combiner does pass the phantom power provided to it on to both microphones.
Q:What can I expect when tracking cello with a ATM350 and a piezo mic comined with the AT8681?
Q:Will using 2 mics via AT 8681 require an additional inline phase switch on one when used with the focusrite ISA Pre?
A:Great question. The phase/polarity switch on the ISA-1 would flip the polarity of both microphones. However, the phasing between the microphones will be more-so related to the microphones placement (relative to the other microphone and the sound-source) than it will be to the electrical circuit of the AT8681. Also, since the AT8681 is a microphone combiner, you will not get a stereo image from the two microphones. If you believe there is a phase issue between your two microphones, you would need to get a polarity inverter (sometimes incorrectly labeled as a "phase" inverter) to correct for this issue. However, careful selection in microphone placement (X/Y or 3:1 Rule) should balance out the phasing properly which should reduce the need for a polarity inverter.