There are differences between The Truth and a passive attenuator based control

Posted by 1973shovel (A) on March 11, 2011 at 13:47:45

In Reply to: My first "zero gain preamp" posted by E-Stat on March 11, 2011 at 12:45:47:

The input and output impedance, and the resulting issues those impedances create, always kept me away from a passive volume control

Here's information I've lifted from the Horn Shoppe site:

"It has an input impedance too high to measure, output impedance is a couple ohms, bandwidth is to 60Mhz, slew rate is a couple hundred V/microsecond.

There are no capacitors or resistors in the signal path. There is no potentiometer in the signal path.

It uses photo cells to control the volume. It does not use optocouplers.

It is an "active" device and suffers none of the "problems" that "passive volume control/pre amps" have. It can drive long (30 feet) cables with ease."

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Follow Ups Full Thread

Topic - REVIEW: Horn Shoppe The Truth Preamplifier (SS) - carlsor 12:21:11 03/09/11 (12)

RE: (strong)REVIEW: Horn Shoppe The Truth Preamplifier (SS)(/strong) - jtsnead 09:02:36 03/13/11 (0)

What were other preamps it was compared to? N/T - carcass93 10:57:45 03/11/11 (0)

Some very fine SS preamps have had no gain. Like... - samtellig 06:34:46 03/10/11 (2)

"But what is it about the truth?... That no one wants to hear it?" ... Can't Handle The Truth! - Chris O 08:15:26 03/10/11 (1)

RE: "But what is it about the truth?... That no one wants to hear it?" ... Can't Handle The Truth! - clio09 12:15:02 03/13/11 (0)

RE: REVIEW: Horn Shoppe The Truth Preamplifier (SS) - clio09 06:30:17 03/10/11 (5)

My first "zero gain preamp" - E-Stat 12:45:47 03/11/11 (4)

There are differences between The Truth and a passive attenuator based control - 1973shovel 13:47:45 03/11/11 (3)

If you need to drive long cables - E-Stat 14:50:51 03/11/11 (2)

I agree... - clio09 12:11:02 03/13/11 (1)

It is all about - E-Stat 14:54:55 03/13/11 (0)

I've said if before, but I feel like a Stepford Wife - 1973shovel 06:20:24 03/10/11 (0)

Follow Ups

There are differences between The Truth and a passive attenuator based control - 1973shovel 13:47:45 03/11/11 (3)

If you need to drive long cables - E-Stat 14:50:51 03/11/11 (2)

I agree... - clio09 12:11:02 03/13/11 (1)

It is all about - E-Stat 14:54:55 03/13/11 (0)

There are differences between The Truth and a passive attenuator based control

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