Altec Model 19 Crossover - "Optimum" HF and MF settings

**polaris26** · July 4th, 2023, 06:54 AM

Could some kind person who has access to the Model 19 crossover please tell me what the MF and HF pots (rheostats) actually measure when the controls are set to the "optimum" settings as marked on the front panel? I am trying to run sims for a custom crossover. My estimates are around 2 ohms for the HF and maybe 10 to 15 ohms for the MF. I would like to confirm my ballparks with actual measurements and do not have access to that crossover.

Thanks!

Regards,
Dave

**RonSSS** · July 11th, 2023, 12:26 AM

I answered for you over on AK.

Ron

**Phil-G** · August 25th, 2023, 08:06 PM

Hi Ron, could you post this here too. Thanks,

**RonSSS** · August 28th, 2023, 12:30 PM

MF control 10-15 ohms in the optimum range. So 12.5 centered in that range. The range of that pot is 0-32 ohms.

HF control is 0-1.4 ohms in the optimum optimum range. 1 ohm centered. The range of the pot is 0 to 8 ohms.

They are linear.

I had a spare crossover here, so I measured them. The HF is across a coil, so had to unsolder one lead.