Altec 1689A Preamlifer Mixer

[Audio_by_Goodwill]

A few of these have shown up on Ebay pretty cheap. Would this work well for me, to run a DVD player through my 9444A? Currently, I have my DVD player connected directly to the amp, and it works okay, but I'd rather have a pre-amp. This is used for DVD and CD use in my living room.

[tomt]

most likely.

[Audio_by_Goodwill]

Here is the only copy of the spec sheet I could find online.

Altec Lansing Professional Amplifiers Microphone Specification List 1689A Mixer Preamplifier page 1

[Audio_by_Goodwill]

Hmmm, after careful reading, I think I'd need two of them, not one like I first assumed.

What is a "pre-amplified" signal called? ...... in other words the output from a pre-amp ready for a power amp.

[bowtie427ss]

Hmmm, after careful reading, I think I'd need two of them, not one like I first assumed.

What is a "pre-amplified" signal called? ...... in other words the output from a pre-amp ready for a power amp.

You're correct, single channel(mono) out.

"Mains send" or "Mains out" IMO is probably the most accurate term for your pre out signal, "send" sometimes implies the output of a loop, and "mains" is sometimes assumed to mean AC mains. So, i think you have to be careful about calling it anything other that what it is "preamp out" unless you're in familiar company.

[whitebroncoii]

The 1689A is a two-channel mixer. It has very good transformers on both inputs and a transformer on the main out (mono). There is an unbalanced line output for each input. I have successfully used these for stereo applications.

The bass and treble circuits are in the mono main output and will not affect the line outs.
The mic/line switch bypasses the input transformer.
Throughput gain can be as much as 54dB (selected with internal switches).

Maximum output is 18dB. Good gain structure through a 9444A would be with the amplifier's volume controls around 2 o'clock.

[Audio_by_Goodwill]

You're correct, single channel(mono) out.

"Mains send" or "Mains out" IMO is probably the most accurate term for your pre out signal, "send" sometimes implies the output of a loop, and "mains" is sometimes assumed to mean AC mains. So, i think you have to be careful about calling it anything other that what it is "preamp out" unless you're in familiar company.

I was thinking mainly about what equipment manuals might call it. Last night, reading the spec sheet I trying to evaluate exactly what the output connections where. I'll explain more in my response to whitebroncoii.