Resistor in parallel with driver

[yankee]

What general effect does placing a resistor across the neg and pos terminals of a driver have?

 

[cowanaudio]

Flattens its impedance curve. Only useful in passive crossover designs.

 

[YSDR]

Additionally lowers the total impedance, and the resistor can heat up as hell, more easily than a series resistor (usually).

 

[yankee]

Does it also smooth out frequency response?

 

[Lojzek]

There is a couple of simulators easy to use which will make you understand the situation thoroughly. GI-GO applies.

 

[AllenB]

Does it also smooth out frequency response?

What amp do you use, what is its output impedance?

 

[Datsun]

What general effect does placing a resistor across the neg and pos terminals of a driver have?

First of all - the sound pressure of the driver will drop.

 

[YSDR]

First of all - the sound pressure of the driver will drop.

It will drop, but in the worst way. The lower the impedance (smaller value resistor) the lower the SPL will be.

 

[picowallspeaker]

First of all - What is a frequency response ?!

 

[YSDR]

Ahh, i checked, if you put a parallel resistor to a bare driver without additional passive elements, and the amplifier output impedance is negligible, then the sound pressure stays the same, and only the impedance gets lower.