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"Forever" on ABC, great show. Looks like a pair of Augspurgers.63861

Bikes in some ways are very much like hifi and many other products. Despite the current industry's best minds trying to make every possible improvement to their products, the stuff made in the past...

What is the rule of thumb for low cutoff of midrange tractrix horns? I wish for a crossover point of 500Hz, so should I consider what people claim to be 250Hz horns or will 400Hz be sufficient? I...

What are the numbers frequently written in magic marker on the top plate, which is what I am calling the silver ring typically visible around the driver under the cover? Typical values would be 0.2...

Anyone using this amp for powering compression drivers in an active crossover system for home use? I was wondering if it is very quiet as far as hiss, quiet as far as transformer hum as in standing...

After the price of the TAD drivers, I really should splurge a little on the amps. I always liked Crown, but right now I feel like an amp I didn't already own in 1980. D75's I think don't have turn...

Everyone seems to down rate Behringer, I guess what I liked was the display and the available microphone for short money. I find the RAT site a little confusing: I thought the reason Ashly went...

I thought the spectrum analyzer would be useful in flattening out the response, better than my ear. I always feel like there is a hole somewhere. And my repairman,...

Thanks for all the answers. The rest of the system is mostly TAD, 1601B and 1602 woofers, 1201H upper bass, 4002 w/tractrix horn, and JBL 2404,guass or yamaha tweeters. For amps, ab systems,...

I am using a Sony ta-e90es preamp to a KT410 eq to a Ashly 4001, and right now I use the RCA outs to another 4001. But I want to go balanced to both 4001's, to reduce the noise floor a little. (the...

Will fabricating another cable split off a balanced XLR cable, to run two balanced input crossovers from a balanced preamp out, cause any problems? Thanks.

I had 6 TAD 1601A woofers that came from Westlake Studio A, or perhaps B or C, I don't remember. I bought them from some sort of storage facility or perhaps liquidator in CA, it was off ebay, and...

Keep in mind 1601c drivers are no longer sold, and I have never seen them available lately. I have only seen one used pair online in 2 years. Most online sources that say they have them,...

Thanks everyone for the good advice. In the end I probably should have done more online research and could have spare you guys the effort.... I wasn't expecting the balanced verse consumer ...

Progress so far is leaning towards Bo's isolation transformer. The Klark doesn't seem to be the problem. Unbalanced preamp seems to be the source. With a balanced amp and the preamp ...

Hi Mike.
A little hiss, which seems normal for compression drivers.
The woofers have a grainy hum, perhaps centered at 240hz or lower, but not bassey sounding. Thanks, Malcolm

Will the balanced preamp need balanced sources such as Tuner, cassette, etc.? Thanks.

There is no other way besides a transformer? I would rather not get involved with those in the signal path. Nothing can be done using xlr to 1/4 and wiring it a certain way?

Correct this is the hookup.

Phase amp only - no hum. very very low noise.

Add the preamp directly connected to Phase -- tiny bit more noise, but only noise increase comes from turning the...

The preamp (DB-1A) is standard RCA affair, and the Phase runs very quite when directly connected. I don't think the Phase causes upstream damage. I noticed my Biamp 2400 makes all the other amps ...

Thanks for all the helpful responses. I have eliminated sources before the preamp as noise source. When preamp is directly hooked to 1/4" non TRS Phase A60 amp, the noise is the least. Also ...

My equipment chain is this: Preamp to a KT DN410 EQ (which has the balanced box checked off on it) with a RCA to XLR adaptor cable, to a XR4001 crossover with XLR-XLR cable. (I don't know if the KT...

Anyone have any favorite amps large and small for running high efficiency speakers including compression drivers with respect to background noise (hiss/hum) in a multiway active crossover system? My...