Mic Pre QPP
Our mic pre is the most important part of your signal chain. Each QPP features four all-discrete, all-iron mic pres with a simple and powerful two stage design. You get four channels of classic transformer-coupled mic preamplification with unmatched tone and flexibility at an absolutely unbeatable price.
The Jensen input transformer feeds a discrete operational amplifier for up to 64 dB of gain. An interstage trim control allows you to get the right amount of coloration or drive from the amp without using an inline pad. The output line amp uses a second discrete op amp by a custom-wound Cinemag output transformer. A 20 dB pad, polarity, mute, and 48V phantom power switchbank rounds out the feature set.
We use our own modern power supply design that produces a vanishingly quiet preamp with what feels like endless headroom and snappy transients.
The QPP comes standard with a pair of M2 op amps. These are our design with very high gain and low distortion, and produce dominant even-ordered harmonics at all levels. This gives a clear, warm sound with a soft top. The op amps are socketed in the industry standard footprint, so you can try out other op amp designs (our Flickinger inspired amp is very popular as well).
We offer a variety of input transformers, output transformers, and op amps to give you the sound you need.
Gain Range 28 - 64 dB (8-44 dB with PAD)
Maximum Input Level -3.5 dBu
Maximum Output Level +26 dBu
Input Impedance 1200 Ohms
Output Impedance <75 Ohms, transformer balanced
Frequency Response +0.1, -0.75 dB 20Hz-20kHz
Signal to Noise Ratio 120 dB
THD @ +15 dBu output 0.02% typical
Crosstalk (any channel) Better than -90 dB
Power Consumption 750 mA max