Options and Custom work

High performance operational amplifiers are available as an upgrade for the XM1, XM9, XM16 and WM8. The suggested opgrades are listed below.
```
 XM1  IC1       BurrBrown OPA2134PA
      IC2,3     BurrBrown OPA2134PA
 XM9  IC1,2     BurrBrown OPA2134PA
      IC3,4     BurrBrown OPA2134PA
 XM16 IC1,2,3,4 BurrBrown OPA2134PA
      IC5,6     BurrBrown OPA2134PA
 WM8  IC1,2,3,4 BurrBrown OPA2134PA
 
```
All packages are 8 pin DIP. There are many other high performance op-amps available from many vendors. Please consult factory for compatibility information.
Balanced inputs and outputs with XLR connectors are available for the XM6, XM9L , XM16L, XM44, XM26 and XM126.
Stepped attenuators are available for all crossovers and the BASSIS, instead of the potentiometers that are normally installed. These attenuators are high quality devices, with 24 positions. We use metal film resistors only. The advantage of the attenuators over potentiometers is the high accuracy and the total elimination of any potentiometer distortion of the sound.
We can do custom modifications of existing products and design completely new products for you.